Atch-01 PWS Attachment 8.7. Short Stay Wastewater Treatment Facility O&M Manual Book 1.pdf

Operation & Maintenance Manual Short Stay Recreational Facility

Moncl<s Corner, SC

Pro System 11631-3 Columbia Park Drive Jacksonville, Florida 32258/ (904)

BOOK ONE

~Pro-Water ~ Systems, Inc. Process Equipment for Water and Waste Water Treatment

Short Stay Recreational Facility

Operational Manual

Book One

1. Operation & Maintenance Instructions for the Wastewater Treatment Plant

2. Operation & Maintenance Instructions for the Tertiary Filter

3. Specifications for the Wastewater Treatment Plant

4. Flow Equalization Chamber Control Panel Bill of Materials and Wiring

Diagram

5. Main Blower Control Panel Bill of Materials and Wiring Diagram

6. Tertiary Filter Control Panel Bill of Materials and Wiring Diagram

Book Two

1. Operation & Maintenance Instructions for the Blowers

2. Flow Equalization Chamber Blower Units Bill of Materials & Details

3. Main Aeration Blower Units Bill of Materials & Details

4. Tertiary Air Scour Blower Units Bill of Materials & Details

5. Operation & Maintenance Instructions for the Flow Equalization Chamber

Pumps

6. Operation & Maintenance Instructions for the Froth Pump

7. Operation & Maintenance Instructions for the Backwash Pumps

8. Operation & Maintenance Instructions for the Mudwell Pump

Book Three

1. Operation & Maintenance Instructions for the Flowmeter

2. Operation & Maintenance Instructions for the Tablet Feeders

Pro-Water Systems, Inc. File Number CT-5110

11631-3 Columbia Park Drive East ■ Jacksonville, Florida 32258 Phone: 904-288-0965 ■ Fax: 904-288-0966

E-mail: pws2@earthlink.net

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PREFACE

This instruction manual describes the operation and maintenance to provide an effluent that meets or exceeds the requirements for which this installation has been permitted.

The system that is on your project will provide many years of service if it is operated and maintained properly. The important thing to remember is that the process requirements are just as important as maintaining the mechanical equipment.

Periodic adjustments will be required due to seasonal changes, inflow fluctuations and sludge volume changes. Your Pro-Water Systems representative is well qualified in this system and will be glad to assist at any time you might need assistance in operational questions or in ordering parts.

We want to emphasize that failure to operate and maintain this equipment properly may not only negate the warranty and lead to premature equipment wear, but may endanger your discharge permit by not meeting your required effluent quality. This could also endanger the environment and public health and safety.

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SHORT STAY

Initial Start-Up Procedures

A. Start-up to begin at the flow equalization control panel

1.

2.

3.

4.

All breakers should be in the "off' position

Check voltage coming into panel. It should be the same voltage as shown on the wiring diagram for this equipment.

Turn main breaker on.

Tum H.O.A. switch for pump one to the hand position. Starter (MTl) should energize. Repeat this procedure for pumps 2 and 3. (The pumps will not run because the power breakers for these pumps have not been turned on yet.)

5. Turn all H.O.A. switches to off.

6. Pull float switches up from the tank and keep in a vertical position.

7. Tum all pump H.O.A. switches to auto.

8. Raise Float Switch #1 180° (the longest float switch) and nothing should happen.

9. Raise Float Switch #2 (the second longest float switch) and one equalization blower starter should energize.

10. Raise Float Switch #3 (the third longest float) and lead pump starter should energize.

11. Raise Float Switch #4 (Fourth longest switch) and one lag pump should energize.

12. Raise Float Switch #5 (fifth longest switch) and lag pump #2 should energize.

13. Raise Float Switch #6 (shortest float switch) and alarm light and horn should energize.

14. Push silencer switch on the side of the control panel to silence alaim horn. (The alarm light will continue to flash)

15. Reverse positions of float 6, and the alarm light will tum off.

16. Reverse positions of floats 5, 4, 3, & 2, and nothing should happen.

1 7. Reverse position of float switch # 1 and all pumps, the blower, and the alaim light should tmn off.

18. Make sure all air piping valves are in the "on" position.

19. Turn all equipment breakers to the "on" position.

20. Turn each pump and each blower one at a time and check rotation. If rotation is backwards turn the pump or blower off, turn the appropriate breaker off and switch pump leads going to the appropriate te1minal strip. Repeat pump or blower operation and check rotation. (This operation for three phase voltage only)

21. Set all switches to automatic operation .

22. Check inlet bar screen and rake debris to drying deck if necessary.

Once dried this debris needs to be removed.

B. Main Aeration Control Panel

1. All breakers should be in "off' position.

2. Check voltage coming into main breaker

3. Turn main breaker only to "on" position.

4. Tum each blower unit H.O.A. switch to hand position. The motor starter should energize.

5. Turn H.O.A. switch to automatic and tum the time clock until blower motor starter is energized. Continue to tmn the clock until starter is de-energized and the second blower staiier is energized. Return the time clock tot the correct time of day and the correct day setting. (See time clock instructions for setting time1:s.)

6. Turn the on/off switch to "on" for the fomih pump and repeat steps 4 and 5. Each time a blower starter is energized the fifth pump starter should energize.

7. Set everything to the automatic position and check the diffuser drop valves and make sure the valves are full open.

8. With the blower on set the valves supplying air to the airlift to allow flow through the airlift pumps. Set for a smooth retmn flow. Too much air will cause erratic retmn and waste of air.

9. Set effluent weir for discharge flow to go over the entire weir length evenly.

10. Set skimmer sleeve for correct flow to discharge to the aeration chamber.

C. Te11iary Filter Control Panel

1. All breakers should be in the "off' position.

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2. Tum main breaker only to the "on" position.

3. Turn each H.O.A. switch to hand (one at a time) and check to see if starter energizes.

4. After doing that for the backwash, mudwell pumps and the air scour blower units turn the H.O.A. switches to the automatic position.

5. Check mudwell pump operation by pulling the four switches in the mudwell to the top and hold vertically. First tum float switch #1 (longest) 180 °. While leaving this switch turn up tmn float switch #2 180 ° and one pump sta1ted should energize. While holding float switches #1 and #2 in the turned up position tmn float switch #3 180 ° and the lag pump starter should energize. While holding these three switches in the turned up position turn float switch#4 up and alarm light and bell should energize. While holding all four switches in the "up" position push the silencer button on the alarm and the alarm horn should turn off. Next tum float switch #4 vertical and the alann light should go off. Next turn float switch #3 and then #2 vertical and nothing should happen. Next turn float switch # 1 vertical and both pump starters should go off.

6. Now tum the float switch in filter cell # 1 and the solenoid valve for that bed should open and the air scour blower starter should energize, sta1ting a backwash cycle. Repeat for the second filter bed.

7. While the controls are in a backwash cycle lift the float in the clearwell up and when it is in the vertical position neither backwash system should operate. This is the low water switch in the cleaiwell float and shuts the backwash system down when there is insufficient water for backwashing.

WASTEWATER TREATMENT PLANT

EXTENDED AERATION -PROCESS

OPERATIONAL INSTRUCTIONS

The wastewater treatment plant at your site is known as an extended aeration type system.

The extended aeration type system means the inflow is aerated for an extended amom1t of time, usually 24-hours, before entering the clarification zones. In this chamber the organic solids in the sewage are disposed by aerobic bacteria.

Biological waste treatment is a process which uses microorganisms to consume dissolved organic contaminants in domestic wastewater and convert them into additional :microorganisms and mix them with incoming wastewater containing organics. The organics are aerated for a pre determined amount of time. After aeration, the mixture of microorganisms and water is channeled to a clarification, or settling, zone where the solid organic contaminants and microorganisms settle, allowing the water to be removed through a baffle and weir trough arrangement. The organic contaminants (sludge) that settle by gravity to the bottom of the settling chamber is pumped back to the head of the aeration chamber for mixing with the incoming wastewater.

The extended aeration process usually consists of five basic parts:

1. Screening

2. Aeration Chamber

3. Clarifier of Settling Chamber

4. Chlorination Chamber

5. Aerobic Sludge Holding Chamber

Wastewater enters the aeration chamber where it is mixed and aerated with settled sludge from the clarifier. During the aeration cycle (remember in the extended aeration process this is generally 24 hours) dissolved organics in the wastewater are consumed by the biology and the solid organics are entrained in the biological sludge. Combined sludge and water (mixed liquor) flow from the aeration chamber into the settling chamber for separation. As a general rule, the settling time is designed for 4-hours ofretention of the average daily flow rate. In the settling chamber the sludge is allowed to settle to the bottom and the clean water is discharged over a weir to the chlorination chamber. The settled sludge is pumped back to the head of the aeration chamber to be mixed with the incoming wastewater.

When the volume of sludge becomes excessive, the sludge from the settling chamber can be diverted manually through valves to the sludge holding chamber. This is done periodically as excess sludge build up occurs over an extended period of time. The time will vary depending on incoming flow, strength of incoming wastewater, and temperature.

The waste sludge diverted to the sludge holding chamber is aerated for an extended period of time and occasionally allowed to settle in order to skim off the water. After a period of time, the sludge is reduced to a relative inert matter. Once a high concentrate is produced in the sludge holding chamber through periodic wasting and skimming the water from sludge, it will be necessary to have this chamber pumped out.

Mechanical equipment and devises normally furnished with the sewage treatment plant are as follows: •

1. BAR SCREEN- To prevent large trash from entering the aeration chamber. Solids collected in the bar screen may be disposed of in a trash can as it is inorganic waste material such as rocks, sticks, or other foreign material that has inadvertently entered the sewer line.

2.

3.

4.

5.

6.

AIR DIFFUSERS - To break the compressed air into small bubbles as it enters the aeration chamber thus allowing greater surface area as it rises to which the bacteria can attach itself

AIRLIFT PUMP - Used to transfer settled sludge from the settling chamber back to the aeration chamber. Also, used to skim off floating material from the surface of the settling chamber.

BLOWER UNITS - To provide compressed air for the treatment process.

CHLORINATION - Used to kill any disease carrying (pathogenic) bacteria which might be in the effluent.

FROTH CONTROL SPRAY - To retard foam sometimes created by the aeration mixing system. This consists of a submersible pump located in the settling chamber, discharging treatment sewage through spray nozzles spaced along the aeration chamber wall opposite the air diffusion equipment.

Aerobic waste treatment is a process in which solids in sewage are partially removed and partially changed by decomposition from complex, highly putrescible organic solids to minerals or relatively stable organic solids. The extent of this change is dependent on the treatment process.

Microorganisms remove wastewater contaminates by absorption and adsorption. Absorption involves taking contaminates into the cell. Materials absorbed are completely digested by the microorganisms. Adsorption involves adhering of contaminates to the cell surface. Materials entrapped in this manner are carried by the cell until it is completely digested and disposed of as waste sludge. In both cases, the end products of the process are CO2 and H2O. Sludge containing substances not readily degradable can eventually metabolize in the sludge holding chamber.

PLANT START UP

Before setting a time for start-up by a Pro-Water Systems, Inc. service representative, certain checks should be accomplished to insure the system is ready for start-up. These checks include the following:

1. TANK FILLING - All chambers in all tanks should be filled with water to proper levels prior to start-up. This should be already done as we advise tanks, especially those going below grade, to be filled as soon as they are set on their respective foundation pads. Be sure all drain plugs have been properly installed as they are shipped without being installed. This is done to insure rain water does not collect in the chambers prior to installation. The tanks can be filled with water, effluent from an existing plant or raw sewage in necessary. If raw sewage is pumped into the tanks then start-up should be planned within a week. One note of caution: while filling the tank, look for any chambers that do not have hydrostatic walls. Most chambers do

2.

3.

have hydrostatic walls, however, by design a wall may not be hydrostatic which will require filling both sides of the wall at the same time. If you have any questions in this area, please contact the factory for instructions.

Have all electrical services been completed with power to all control panels and motors? Has the electrical meter been installed?

Has all backfilling been completed? The service representative must have EASY access to all equipme~t.

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PLANT MAINTENANCE SCHEDULE

GENERAL

1. Be sure tanks are kept completely free of any mud, sand, gravel, rocks, board, etc.

2. Be sure that top of tank walls are always sufficiently above :finished grade to prevent surface water from entering plant.

3. It is recommended that a fence, grating, or some type of protective measure be installed

4. Be sure that blower rotation is correct before starting up plant.

5. Check oil level before starting up. (Blower may or may not be shipped with oil)

6. Do not tum on spray pump until plant is completely :filled and water is.running out of discharge line. Tum on only when foaming is excessive.

7. Scum return pipe should be adjusted so that water is about % 11 to ½" deep in the pipe.

Adjust air valve so that water discharges about 113 full.

DAILY

1. Thirty minute settling test - collect one sample from aeration tank and one from the effluent from the settling tank.

2. Fill out checklist. (See typical report form)

3. Clean accumulated solids from inlet sewer and screening devices.

4. Clean the grease and floating solids from walls and water surface of aeration and settling tanks.

5. Check all equipment to see if it is operation properly.

6. Clean the growths and accumulated solids from weirs and pipe inlets.

7. Check to see if diffusers and aerators are all working properly and not plugged.

8. Check to see if air lift sludge return pump or skimmer is clogged or about to clog.

9. Check chlorine supply.

10. Run pH and residual chlorine tests and run dissolved oxygen test.

WEEKLY

1. Check oil level in blower (See Lubrication Section)

2. Check time and settings on time clocks.

3. Scrape wall and hoppers of settling tank (See Special Maintenance Section)

4. Clean trash and weeds from around plant and equipment.

MONTHLY

1. Lubricate blower bearings. (See Lubrication Section)

2. Check V belts for proper tension and wear. Replace when necessary.

3. Check air filter and clean when necessary.

ANNUALLY

1. Wire-brush and paint all rusted metal.

LUBRICATION SECTION

1. BLOWER - Before starting blower, be sure to check to see if oil has been put in the gear housing. The recommended lubrication oil is listed in the blower operation and maintenance manual. To add oil or check oil level, be sure oil level petcock is open and then add oil slowly until it begins to dribble from open petcock, preferable when unit is idle. Leave petcock open until it has stopped dripping. This avoids over lubrication as too much oil causes heating and oil leakage. Close petcock after checking oil or filling. Change or add oil as needed.

2. BLOWER BEARINGS - Bearings at gear end are lubricated by splash from gears but bearings at drive end are packed with grease prior to shipment. Renew this grease as needed with best grade, high temperature, ball bearing grease. (NOT ordinary cup grease) about once a month.

3. BLOWER MOTOR- Bearings are packed with grease prior to shipment and need no further lubrication.

OPTIONAL EQUIPMENT

4. FOAM CONTROL PUMP - The foam control pump is a sealed unit and requires no additional lubrication.

5. CO:MMINUTOR GEAR BOX - Should be checked weekly since it rum, all the time; use #90 oil to refill housing. Top bearing has grease fitting for lubrication.

6. CO:MMINUTOR MOTOR BEARINGS - No lubrication required.

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SPECIAL MAINTENANCE

(particularly during start-up period)

During the first few weeks of a plant's operation, one of the most common problems is the accumulation of sludge on the hopper slopes of the clarifier or settling tank. However, this problem, like many other problems, may be almost completely eliminated by proper care and maintenance procedures.

The purpose of the settling tank is to settle out and return the solids that pass through from the aeration treatment chamber. One of the characteristics of activated sludge is that it is likely to be stringy or sticky during the early weeks of plant operation. As it settles toward the bottom of the tank, the sludge will cling to the hopper slopes and will not be returned by the 'airlift pump.

After a week or so the continuous build-up of sludge will become a spongy mass completely filling the lower half on the tank. After a short tin1e, this spongy mass will form a gas and break up the mass into chtmks of sludge that float to the surface and be discharged with the treated water.

Naturally this solid sludge condition prevents the equipment in the clarifier from performing properly.

The skimmer, the froth control pump, and the final discharge weir are all hampered in their operation.

In addition, the sludge mass gives off a very strong odor which is almost unbearable to surrounding areas.

It is possible for a sludge return pipe to be discharging clear water while there are three or four feet of sludge in the hopper. (Sec figure 1.) This occurs when soft sludge packs solid almost to the hopper bottom except for a narrow clear channel running dmvn through the mass to the pump intake. Clear surface water is pulled down through this channel and up through the pump without disturbing the sludge mass. Therefore, visual checking of the sludge return discharge is not sufficient.

Every day during the first few weeks of operation the operator or some responsible person should visit the plant to sec that all equipment is mnning and to check the clarifier. The factory serviceman will provide a small scraper to be used to keep the hopper slopes free from sludge build

up. The hopper slopes begin about three to five feet below the water level. The operator should GENTLY scrape all around the hopper in a slow, easy, downward motion just enough to help move the sludge toward the bottom of the hopper where it can be picked up by the sludge pump. DO NOT

STIR OR AGITATE SLUDGE ROUGHLY OR IT 'WILL BREAK UP AND RISE TO THE

WATER LEVEL. If this happens, lhe chunks must be dipped back into the aeration tank for fi.trlher treatment.

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F~lPro-Water· • ~ Systems, In.c. . Process Equipment for Water and Viaste Water Treatment

AIRLIFT PtTh1P OPERATION _ Sltidge accumulation as shown in top view must he gently scraped toward hopper bottom so that sludge return pump will pick it up as in bottom view. Watch discharge pipe to determine correct flow. Pipe should nm about "1/3 of a pipe full" in most cases. Continue scraping procedme at short intervals to allow sludge to be broken up. with a stick or paddle into small pieces for the skimmer to pick up and return to ·aeration tanks. When scraping the clarifier, open the air line valves to the sJdmmei: and _slu~~~-!e.~ pump.

Figure 1

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WITHOUT MAINTENANCE

AIR SlF..: !.:.i.t

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After the plant begins to "work," this procedure may be reduced to weekly or even monthly • as the operator may determine from experience.

II.

Another common condition is a plugged sludge pump. Sludge being heavier than water will normally settle to the hopper bottom. If the sludge is not returning at least "one-third of a pipe full" into the aeration tank, the slower movement of sludge will tend to allow the sludge to pack in the one foot square area at the hopper bottom and pump intake. Finally the sludge begins to build up inside the pump tube until it is blocked completely. This may be remedied by shutting off the air supply to all other equipment and opening the air control valve to the sludge pump. In the absence of a valve on the sludge discharge line, a pipe plug must be installed in the end of the discharge pipe. The air forced downward through the vertical pump tube should break up the solid mass at the pump intake.

The chunks that rise to the top must be dipped back into the aeration tank or broken up into small pieces to be returned by the skimmer.

m.

During construction and initial flow, very often mud is allowed to flow into the plant. When mud gets into a plant, the mud that reaches the clarifier will naturally sink to the hopper bottoms. The mud then mixes with the sludge and fo1ms a heavier, more solid mass than sludge alone. The sludge return pump will not pump heavy mud. Mud may be detected by pushing scraper all the way to the bottom and gently removing scraper. If mud is present, it can be seen on the scraper. Its depth or density may be determined by probing with the scraper. If the mud is not too heavy, it may be removed by stirring at the hopper bottom trying to mix mud with tank water. The pump may pump it out as muddy water. However, if mud is too deep or too heavy, the clarifier may have to be pumped with a power pump and mud cleaned out by hand. If the vertical pump tube becomes clogged with mud, it may be necessary to remove the three-inch pipe plug at the top tee and rod out the mud. Care should be taken to see that the air lines to pumps do not become clogged or restricted by sludge or mud that might back up through the pump tube into the air lines. • If this occurs, the air lines and fitting must be removed and cleaned out. After any cleaning or stopping of operation be sure to set air valves for nom1al operation.

REMEMBER: A clean, properly cared for plant means less repairs a:nd maintenance and more efficient ope1·ation.

DAILY OPERATIONAL OBSERVATIONS AND TESTS

In addition to the daily mechanical maintenance of the treatment plant, daily observations and test of the degree of treatment being given to the sewage should be made. Not less than once per week, a report should be completed.

By visual observation of a few key indicators and the use of a few simple tests, an operator can usually determine if an e>..1:ended aeration plant is functioning properly and providing good treatment. Close observation should be given to the aeration tank, the settling tank, and the effluent.

The aeration tank of a properly functioning plant will appear medium to dark brown in color with little or no loam, or floating material on the surface. If the color is black or gray, the bacteria ( or "bugs") are either not receiving enough air or they are receiving too much sewage or a waste which is toxic to them. Foaming may occur in this tank when the plant is first put into operation and there is not enough sludge or when the plant is over-aerated; the foam control system will usually relieve this.

I. ACTIVATED SLUDGE

One test which gives an indication of the degree of treatment being received is the sludge solids volume test. This test is a measure of the amount of "bugs" or activated sludge present to digest the sewage and the condition of the sludge.

The test is largely a matter of experience and becomes a more useful tool after many samples have been observed. A sample is collected from the aeration tank in a one liter graduated cylinder while the plant is operating and then allowed to stand for thirty minutes.

If a set oflmhoff cones or graduated cylinders is not available to perform the test in the standard manner, relatively satisfactory test vessels may be made from any tall straight sided clear glass containers of at least one quart volume, such as a milk bottle, quart fruit jar, etc. A uniformly divided scale from O to 10 (0% to 100%) should be finnly affixed to the side of each container and coated with wax or shellac to prevent its being readily washed off. The :finished jar will look

• something like the following illustration (See :figure 2.)

~Pro-Water ~ Systems, Inc. -;

I E_Xl-1MPLE

( SLUDGE SOLIDS VOLU_ME TEST

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Figure 2

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SETTLED SLUDGE

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1 • The sludge solids volume is the percentage of the total sample volume which is then occupied t

I I by the sludge volume. A well functioning plant will possess a sludge volume of thirty percent to fifty percent which has the appearance of very small particles of dark brown sponge. A low solids volume would usually indicate a newly installed plant or a previous major loss of sludge in the effluent;

aeration time should be cut to the minimum amount required for proper operation. A high solids volume may indicate a high or excess sewage loan; this can possibly be corrected by a slight increase in aeration time or by wasting sludge to the sludge holding tank.

The settling tank of a properly operating plant should appear clear to a depth of 18 inches to 36 inches below the water surface with a blanket of sludge visible below this level; there should be little floating material on the surface. The effluent liquid should appear almost crystal clear with no murkiness or solid particles. If there are large pieces of floating sludge on the surface and in the effluent, it is caused by either supplying too much air or by not scraping the hopper bottom of the settling tank.

If the plant has fine particles of sludge floating just below the surface in the effluent, it may be slightly under aerated or be receiving toxic material in the income sewage. An excessive amount of grease or cooking oil will cause this condition and may cause the sludge to become yellow in color and produce foam. If large amounts of grease collect on the surface of the settling tank, this should be removed and disposed of; then investigate and correct the problem at the source of the grease.

II. DISSOLVED OXYGEN

Another test which is a useful indicator of plant operation is the dissolved oxygen test. This test is performed by testing a sample of the effluent or the aeration tank liquid with a dissolved oxygen test kit (Hack Chemical Company, Model OX-2 or similar). The results are expressed as parts per million of dissolved oxygen. This is a measure of the oxygen or air available for use by the ''bugs." A normally operating plant should have a dissolved oxygen content of at least 1.0 ppm in the effluent and one to two ppm in the aeration tank.

m. pH

Technically, pH is the logarithm of the reciprocal of the hydrogenion concentration. Basically, it is a measure of the acidity or causticity of the liquid being measured. The pH range is from 1 to 14; a pH of 1 indicating completely acidic conditions and a pH of 14 indicating completely caustic conditions. The pH is measured by using a color comparator (Taylor Model HS or similar).

A normally operating domestic sewage treatment plant should have a pH of between 6.5 and

8.0. The bacteria responsible for the digestion of sewage cannot live and grow if the pH is not in this range. A pH reading outside this range indicates either (1) that the plant is septic; this can be corrected by the methods listed in the first section of the manual; or (2) acidic or caustic wastes are being emptied into the plant; these should be stopped before they enter the plant.

IV. CHLORINATION

The principal reason for chlorination of sewage effluent is for disinfection. Sewage treatment cannot completely remove the pathogenic ( disease causing) bacteria which may be present. The chlorine residual is measured by using a color comparator, the same instrument used to measure pH.

(Taylor Model HS or similar)

When effluents are discharged to bodies of water which are or may be used as a source of public water supply for recreational purposes, in order for chlorination to kill these harmful bacteria (disinfection) a chlorine residual of greater than 0.5 ppm must be maintained in the effluent. If the test results are less than this, increase the rate of chlorine feed or the strength of the solution (for hypochlorinator). A dose of 8 ppm free chlorine should produce a chlorine residual of 0.5 ppm or more.

V. ULTRA VIOLET

In streams that are sensitive to chlorination ultraviolet disinfection is another way to completely remove pathogenic bacteria. If your plant has this system, look at the index for a section on this equipment.

VISUAL CHECK LIST

EQUIPMENT AERATION SETTLING EFFLUENT COMMENTS&

OPERATION TANK TANK CORRECTIONS

1. Air bubbles rising Surface clear to a depth Clear, sparkling All good - continue same All equipment Chocolate color of 18 or more inches. No solids operation.

operating properly Little or no foam More than 1 ppm D.O.

20% - 50% solids.

More than 1 ppmD.O.

2. Few or no air bubbles Dark and murky Murky, Odor Check for major air leaks.

Same nsmg. High Solids Clean diffusers and/or air

Black color lines. When corrected, aerate NoD.O. continuously until brown color and D.O. return. Then return to time clock operation.

3. Same Same Same Check for: power outages, Equipment not fuses blown, replace. Reset operating: Check time circuit breaker. Motor clock first; may be on overloaded; push reset button.

"off'' cycle Check overload heaters if reset does not start motor.

Check ''V" belt drive

4. Air bubbles rising. Murky, No visible Murky, High Solids. Over aeration, plant is running All equipment operating Light muddy color . . sludge blanket. · - too much . . Reduce mnoiog

Too much foam Floating sludge in some time to minimum necessary to 5%-15% solids. areas maintain brown color.

Murky Supernatant, Common during start-up poor separation of liquid period. Use commercial and solids. defoamer if necessary.

EQUIPMENT AERATION SETTLING EFFLUENT COMMENTS&-

OPERATION TANK TANK CORRECTIONS

5. Air bubbles rising Murky, large chunks of Murky, high solids Probably due to inadequate All equipment operating Chocolate or gray color floating sludge. sludge return. Scrape tank properly 10% - 25% solids more often; check return

1-3 ppmD.O. pump - should be returning 1/3 full. See special maintenance section. Also see Item 4 on checklist.

6. Air bubbles rising Clear at surface, visible Not murky, excessive May be due to excessive Same Chocolate color. sludge blanket 12 inches solid particles. D.O. sludge return and/or

20% - 50% solids or so below surface approximately 1 ppm skimming. See Special 1-3 ppmD.O. Maintenance Section.

Possibly due to inadequate return (see Item 5). Also check BOD and flow- plant may be overloaded

7. Same Much floating Clear, no solids. May be due to clogged or All equipment operating D.O. more than 1 ppm improperly set skimmer;

properly except skimmer adjust or unclog. (See

Special Maintenance Section)

8. Same Same as Item 5 Same as Item 5 Possibly due to clogged All equipment operating sludge return; check air properly except sludge supply lines (See Special return pump Maintenance Section)

EQUIPMENT AERATION SETTLING EFFLUENT COMMENTS&

OPERATION TANK TANK CORRECTIONS

9. Same as Item 2 Same as Item 2 Same as Item 2 Possible failure of time Equipment will work on clock; have electrician manual but not on check. Overload may be automatic released. Push reset button.

10. Same as Item I Same as Item 1 Same as Item 1 Possible spray pump not All equipment operating operating. Check power properly except spray supply and push reset.

system Possible pump plugged;

removed pump and clean intake. Possible clogged nozzles; clean.

11. Air bubbles rising Murky. Brownish yellow Murky. Possible excessive All equipment operating Light muddy color floating greasy sludge. Excessive solids. amounts of grease coming properly Yellow foam, grease balls Excessive grease into plant; check grease

NoD.O. trap. Remove grease before it gets to the plant.

SEWAGE TREATMENT WORKS OPERATING REPORT

(Small Extended Aeration)

Name of Plant: _________ ___ _ ___ ___ County: _ ______ _ Address: Date: -------Design Population: _ _ ___ Connected Population: ___ __ No. of Houses:. _____ _ Daily Flow from Recorder: GPD or Height on Weir: ___ _ inches, _____ GPD Air Temperature: Degrees F.

RAW SEWAGE

COLOR: Black_ Gray_ ODOR: Septic_ Fresh_ SETTLING TEST: Volume __ % or -~M1/l. pH: _ _ _

AERATION TANK

BOD: __ Mg/1

TEMPERATIJRE: __ F

COLOR: Black_ Lt. Brown_ Dk. Brown_ ODOR: Dishwater __ Greasy_ Earthy_ FLOATING SOLIDS AND/OR FOAM (Describe) _ _____ ___ ________ _ SETTLING TEST: SLUDGE VOLUME ___ % DENSITY: Thick_ Thin_ Some Floating_ CLARITY OF SUPERNATANT: Clear__ Turbid__ Very Turbid __ DISSOLVED OXYGEN: ______ MG/L pH: _ _____ _

SETTLING TANK

COLOR: Clear_ Dark_ Turbid_ Milky_ ODOR: Septic_ Greasy_ Earthy _ _ FLOATING SOLIDS and/or FOAM ______________________ _

FINAL EFFLUENT

COLOR: Clear_ Dark_ Turbid_ Milley_ ODOR: Septic_ Greasy_ Earthy _ _ SETTLING TEST: SLUDGE VOLUME - Trace to ¼" __ ; ¼" to ½" __ ; ½" or more __ ;

Some Floating __ ; or (Imhoff cone ) __ ml/I DISSOLVED OXYGEN: __ Mg/1 pH:__ CHLORINE __ mg/1 TEMPERATURE_----'F BOD ___ mg/1 or RELATIVE STABILITY ___ days

ADDITIONAL REMARKS: DESCRIBE ANY UNUSUAL OBSERVATIONS, PROBLEMS, AND EXPERIENCES WITH

PLANT ON REVERSE SIDE OF 1HIS SHEET.

SUBMITTED BY:

NAME _________ _

TITLE. _________ _

I ~Pro-Water .

I~ Systems,Inc.

FlLENO .. _______ _

SERVICE CHECK LIST

JOB NAME. ____________ _

I I

LOCATION ____________ _

DATE CHECKED BY

·~1r-:1~: :~~~.:I.r,.1;~~1:, r~~~,\ .i";~~~~1···t~1:~~r~: ,.,-~;_J~~1~ -.: .. ~;-~1 .. t~~{f/&:.®"""',:';~~~;.~~;-r~~~--,r'"'i' I "•I, ,•.-;;,0,~" 1~,· ,,, ,,,,, tljl ,fl!,l(c,,•;'&;-·,,,, -~-,-~' ,: ·, '"·'\I .,,,:,, ,,,\illi~",,7 .,, .-·· (:1,f) A~A 1.~,.~~1¥;; ~ ~.li.:lli..w."~:L:1!.~~t::...i.£~'.0w:.,,.,.,. ,rr:ireii:.~~_:\j;:ll_- ~..:.i:~~~ ~l!t!.t:.!~~~ :;..u~~--,..,tr, ··- .. ,~~1f;;j,'.:J~~

1. GENERAL PLANT OPERATION

(a) Diffuser Action

(b) Color of Aeration Water

(c) Color of Clarifier Water ( d) Sludge Condition

(e) Foam Condition

(f) Manual Controls

(g) Automatic Controls {h) Visual Electrical Check

(i) Visual Effluent Check G) Time Cloe~ Correct Time ~) Time Clock Opera~g Time

(1) D.O. Test

{m) Solids Test By Volume

2 . GENERAL PLANT APPEARANCE

. (a) Condition of Tank & Components

(b) Condition of Plant Area ( c) Condition of Gratings ( d) Condition of General Maintenance

3. BLOWER & MOTOR

(a) Air Filter

(b) Oil Level

(c) Belts ( d) Air Pressure & Gauge

(e) ReliefValve

I

(f) Blower & Motor Operation

4. SPRAY PUMP

(a) Nozzles or Impeller

(b) General Condition

(c) Is Pump in Use

5. AIR LIFT PUMPS :

(a) Operation - Return Flow

(b) Skimmer

6. FLOW-EQUALIZATION PUMPS

(a) Operating

(b) Water Level ( c) General Condition

7. CHLORINATOR

(a) Operating

(b) Chlorine Solution ( c) General Condition

8. SLUDGE HOLDING CHAMBER

(a) Liquid Level .

(b) Color ofLiquid

(c) General Condition (d)Solids by Test Volume

I ~Pro-Water ~ Systems, Inc.

I FlLENO. _______ _

SERVICE CHECK LIST

JOB NAME ____________ _

LOCATION ____________ _

DATE CHECKED BY

1. . GENERAL PLANT OPERATION

(a) Diffuser Action

(b) Color of Aeration Water

(c) Color of Clarifier Water.

(d) Sludge Condition

(e) Foam Condition

(f) Manual Controls

(g) Automatic Controls

(h) Visual Electrical Check

(i) Visual Effluent Check G) Time Clocks Correct Time

(k) Time Clock Operating Time

(1) D.O. Test

I

(m) Solids Test By Volume

2. GENERAL PLANT APPEARANCE

(a) Condition of Tank & Components

I (b) Condition of Plant Area ( c) Condition of Gratings

(d) Condition of General Maintenance

I 3. BLOWER & MOTOR

(a) Air Filter

(b) Oil Level

I (c) Belts ( d) Air Pressure & Gauge

(e) ReliefValve

I

(f) Blower & Motor Operation

4. SPRAY PUMP

I (a) Nozzles or Impeller

(b) General Condition

(c) Is Pump in Use

5. AIR LIFT PUMPS

(a) Operation - Retwn Flow

(b) Skim.mer

6. FLOW-EQUALIZATION PUMPS

(a) Operating l

(b) Water Level ( c) General Condition

7. CHLORINATOR

(a) Operating

(b) Chlorine Solution

(c) General Condition

8. SLUDGE HOLDING CHAMBER

(a) Liquid Level

(b) Color of Liquid ( c) General Condition

I .WI Pro-Water .

~ Systems, Inc.

I Fn..ENO.

SERVICE CHECK LIST

-------- JOB NAME _ ______ ____ _ _

LOCATION ____________ _

DATE CHECKED BY

1. GENERAL PLANT OPERATION

(a) Diffuser Action

(b) Color of Aeration Water

(c) Color of Clarifier Water

(d) Sludge Condition

(e) Foam Condition

(f) Manual Controls

(g) Automatic Controls

(h) Visual Electrical Check

(i) Visual Effluent Check G) Time Clocks Correct Time

(k) Time Clock Operating Time

(1) D.O. Test

(m) Solids Test By Volume

2. GENERAL PLANT APPEARANCE

(a) Condition of Tank & Components

(b) Condition of Plant Area

(c) Condition of Gratings ( d) Condition of General Maintenance

I 3. BLOWER & MOTOR

(a) Air Filter

(b) Oil Level

I (c) Belts ( d) Air Pressure & Gauge .

(e) Relief Valve

(f) Blower & Motor Operation

4. SPRAY PUMP

(a) Nozzles or Impeller

(b) General Condition

(c) Is Pump in Use

5. AIR LIFT PUMPS

(a) Operation - Return Flow

(b) Skimmer

6. FLOW-EQUALIZATION PUMPS

(a) Operating l

(b) Water Level ( c) General Condition

7. CHLORINATOR

I (a) Operating

(b) Chlorine Solution ( c) General Condition

8. SLUDGE HOLDING CHAMBER

(a) Liquid Level

(b) Color of Liquid

(c) General Condition rLUVV v�. Mt:AU UA I A DATA

TRIANGULAR WEIR 833.306

FLOW IN MILLIONS OF GALLONS PER DAY (MGD)

i J.

HEAOIN INCHES

lr:LOW IN 221/1" 30" 45• so· 90"

• MGD WEIR WEIR WEIR WEIR WEIR

TRIANGULAR WEIR

0.01 2.B4 2.55 2.17 1.97 1.57

0.02 3.78 3.39 2.B7 2.59 2.08

FLOW IN GALLONS PER MINUTE (GPM)

HEAD IN INCHES

0.03 4.47 4.00 3.39 3.05 2.44

0.04 5.03 4.50 3.81 3.42 2.74

0.05 5.51 4.92 4.17 3.74 3.00

0.06 5.94 5.31 4.49 4.03 3.22

FLOW IN 221/i 0 30° 45• 60" 90• 0.07 6.33 5.65 4.78 4.28 3.43

GPM WEIR WEIR WEIR WEIR WEIR 0.08 6.68 5.97 5.05 4.52 3.62

r l

0.09 7.01 6.26 5.29 4,74 3.79

0.10 7.32 6.54 5.52 4.94 3.96

0.15 8.65 7.71 6.51 5.81 4,65

0.20 9.74 8.68 7.32 6.52 5.22

0.25 10.67 9.50

8.02 7.13 5.71

0.30 11.50 10.24 8.63 7.67 6.14

0.40 12.95 11.52 9.70 8.60 6.89

0.50 14.19 12.62 10.62 9.40 7.53

0.60 15.29 13.59 11.44 10.12 8.10

0.70 16.29 14.47 12.18 10.76 8.61

0.80 17.21 15.29 12.86 11.35 9.09

0.90 18.06 16.04 13.49 11.90 9.52

1.00 18.86 16.74 14.08 12.41 9.93

1.10 19.62 17.41 14.63 12.89 10.32

1.20 20.33 18.04 15.16 13.35 10.69

1.30 21.01 18.64 ' 15.66 13.78 11.03

1.40 21.66 19.21 16.14 14.20 11.37

1.50 22.28 19.76 16.60 14.59 11.68

1.60 22.88 20.03 17.04 14.98 11.99

1.70 23.46 20.80 17.46 15.34 12.28

1.80 24.01 21.29 17.87 15.70 12.57

1.90 24.55 21.76 18.27 16.04 12.84

2.00 25.08 22.22 18.65 16.37 13.11

2. 10 25.58 22.67 19.03 16.70 13.37

2.20 26.08 23.11 19.39 17.01 13.62

2.30 26.56 23.53 19.74 17.31 13.86

2.40 27.03 23.94 20.09 17.61 14.10

2.50 27.48 24.35 20.42 17.90 14.33

2.60 27.93 24.74 20.75 18.18 14.56

2.70 28.37 25.12 21.07 18.46 14.78

2.80 28.79 25.50 21.38 18.73 15.00

2.90 29.21 25.87 21.69 19.00 15.21

:1.00 29.62 26.23 21.99 19.26 15.42

3.10 26.58 22.29 19.51 15.62

3.20 26.93 22.58 19.76 15.82

3.30 27.27 22.86 20.00 16.02

3.40 27.60 23.14 20.24 16.21

3.50 27.93 23.41 20.48 16.40

3.60 28.26 23.68 20.71 16.58

3.70 28.57 23.95 20.94 16.77

3.80 28.89 24.21 21.17 16.95

3.90 29.20 24.46 21.39 17.12

4.00 29.50 24.72 21.60 17.30

4.10 24.97 21,82 17.47

• 4.20 25.21 22.03 17.64

4.30 25.45 22.24 17.B0

4.40 25.69 22.44 17.97

4.50 25.93 22.65 1B.13

4.60 22.85 18.29

4.70 23.04 18.45

4.BO 23.24 18.61

4.90 23.43 18.76

5.00 23.62 18.91

10 3.JO 2.96 2.51 2.28 1.82

20 4.39· 3.93 3.33 3.00 2.40 30 5.19 4.64 3.93 3.53 2.83.

40 5.84 5.22 4.42 3.96, 3.17 50 6.40 5.72 4.83 4.33 3.47 60 6.90 6.16 5.21 4.66 3.73 70 7.35 6.56 . 5.54 4.96 3.97 80 7.76 6.93 5.85 5.23 4.19 90 8.15 7.27 6.14 5.48 4.39

100 8.51 7.59 6.41 5.72 4.58 150 10.05 8.95 7.55 6.72 5.38 200 11.31 10.07 8.49 7.54 6.04 250 12.40 11.03 9.29 8.25 6.60 300 13.36 11.88 10.01 8.87 ' 7.10 350 14.23 12.66 10.66 9.43 7.55 400 15.04 13.37 11.25 9.95 7.97 450 15.78 14.02 11.80 10.43 8.35 500 16.48 14.64 12.32 10.88 8.71 550 17.14 15.22 12.80 11.30 9.05 600 17.76 1s.n 13.26 11.70 9.37 650 18.36 16.30 13.70 12.08 9.68 700 18.92 16.80 14.12 12.45 9.97 750 19.47 17.28 14.52 12.80 10.25 800 19.99 17.74 14.91 13.13 10.51, 850 20.50 16.19 15.28 13.45 10.77 900 20.98 18.61 15.64 13.76 11.02 950 21.45 19.03 15.99 14.07 11.26

1000 21.91 19.43 16.32 14.36 11.49 1100 22.79 20.21 16.97 14.91 11.94 1200 23.62 20.93 17.58 15.44 12.36 1300 24.40 21.63 18.16 15.95 12.77 1400 25.16 22.30 18.71 16.43 13.15 1500 25.88 22.93 19.24 16.88 13.52 1600 26.58 23.55 19.76 17.33 13.87 1700 27.25 24.14 20.25 17.75 14.21 1800 27.90 24.71 20.72 18.16 14.54 1900 28.52 25.26 21.18 18.56 14.86 2000 29.13 25.79 21.63 18.94 15.17 2100 26.31 22.06 19.32 15.47 2200 26.82 22.48 19.68 15.76 2300 27.31 22.89 20.03 16.04 2400 27.79 23.29 20.38 16.31 2500 28.26 23.68 20.71 16.58 2600 28.71 24.06 21.04 16.85 2700 29.16 24.43 21.36 17.10 2800 29.59 24.80 21.67 17.35 2900 25.15 21.98 17.60 3000 25.50 22.26 17.84 3100 25.84 22.57 18.07 3200 26.18 22.86 18.30

3300 23.15 18.53 3400 23.42 18.75 3500 23.70 18.97

NOTE: Conversion Formula Million Gallons Per Day (M.G.O.) = C.F.S. x .646

•• [ilEf\N\MLT

... .- · � WALLACE E TIENNAN

- .. .-., -------------DIVISION----------------------

25 MAIN STREET. BELLEVILLE. NEW JERSEY 07109 CAT. NO. 833.306

Printed in USA

~[fIE SUTORBILT

POSITIVE DISPLACEMENT CYCLE

INTAKE

, \ L'\\I ISi ;II \I ,·,1li1111c nl g;-1.., ,.., drawn 1111<' the t'1·l i11dc 1 hv 1lie

:1: •1io11111 dw 1m11111g 1111prlk rs

Aeration Blower

DISCHARGE

.-\ (u11s1 ,1111 1·ulu111r ,ii gas ,,, fmn-d 1.1111 1 h 1, ll 1gli

1hc disd1a1gt' pun

TRANSFER

, \ L'<llbl<llll \'llllllllt' n r 1rnp11t·tl ga:-. '" m111:-.k11nl

,11\ 1111HI d1t: ,·yli11dn 1,1 ilw dis,·h;ugL' p, 11'1

Two specially designed figure-eight impellers turn in opposile directions within a rnochined housing, transferring a consta nt volume of gas from the inlet to the discharge with every rotation of the b lower drive shaft. No lubricatio n within the cylinder is requ ired os the rotating con,ponen ts are held in close tolerance to each other and do not make contact. The irnpeller positioning is rnaintained by precision timing gears affixed lo each impeller shaft. All essential gear and bearing lubrication occurs externally to the cylinder assuring clean, o il - free gas delivery under all operating cond itio ns. Compressio n occurs after the gas leaves the blower and encounters system resistance in performing its intended work.

OPERATION OF TERTIARY FILTER

FILTRATION CHAMBER

An influent trough shall be constructed as part of the filter to allow the influent to go to both filter beds. There shall e an opening to each filter bed with a valve to adjust the rate of flow into each bed equally. This design will allow complete bypassing of either filter for maintenance, which allowing the other to remain in service. The chamber above each filter bed shall be of sufficient capacity to entrap and hold floating, suspended and settleable solids until such time as the solids are backwashed into the holding chamber designed to pump this wastewater back to the head of the sewage treatment plant for re-treatment.

The flow shall pass through the filter bed into the clearwell and discharge into the outlet weir box.

There shall be provided a bypass trough around the filter chambers to flow directly into the outlet box in the clearwell if the incoming flow is not suitable to filter or repairs need to be made to the filter beds. A slide gate is provided to prevent flows from entering the bypass under normal operation.

FILTER CHAMBER

There shall be provided two filter chambers each with a surface area of21 square feet to insure a filtration rate of not more that one GPM square foot. The chamber above each filter bed shall be of sufficient capacity to entrap and hold, floating suspended and settleable solids until such time as the solids are backwashed into the wastewater chamber.

Filtrate shall percolate through he filter bed and filter nozzles to a false bottom.

From the false bottom, filtered water shall flow to the clearwell chamber. Each filter chamber shall be accessible for :jnspection and maintenance of the filter nozzles.

During normal operation of the filter a maximum of 2' -6" of water shall be maintained over the filter media.

FORM 360

I l

FILTER MEDIA

The filter media shall be furnished in sealed bags not to exceed 100 pounds each. The filter media shall be packed on shipping skids and shipped to the jobsite for installation after installation of the filter system. Before the installation of the filter media by the contractor, the filter nozzles should be inspected to insure that no filter nozzles have broken from shipment or installation. Replacement of any broken nozzles must be perfonned before any media is placed into the chamber.

The contractor shall position the filter media in the filter cells as shown o the plans. The filter media shall consist of twelve inches of sand, 0/80 to 1.20mm effective size with ah uniform coefficient of 1.42. He filter nozzles shall have slots of .5mm width and shall be placed on the false bottom of the filter chamber. Refer to nozzle detail at the back of this section.

AIR SCOUR

An air scour system shall be provided in each filter bed to air scour the filter media prior to backwash. The air scour airheader shall be removable from the filter. The air scour distribution system consisting of a perforated pipe manifold shall be installed below the filter cones to allow even distribution of the air into the filter media. Air scour shall be controlled by a solenoid valve mounted in the airheader to each filter bed. The operation of the air scour system shall be such to allow either automatic or manual air scour prior to backwash. The air system for the air scour is detailed under the section titled AIR SCOUR BLOWER.

BACKWASH OPERATION

AUTOMATIC BACKWASH

When the resistance of the flow through the filter media allows the water level to rise in the filter chamber to a predetermined level, a liquid level switch shall initiate the automatic backwash cycle. This system will activate only of the backwash hand-off-auto switch is in the automatic position.

When the automatic backwash system has been initiated by the liquid level switch the following sequences occur in the electrical control panel. First, a relay is closed and the cam timer calls for an air scour of the filter bed to break up the solids on top of the bed. The air scour time is adjustable and is set at the factory for a four-minute air scour cycle. After the level returns to a normal operating level in the filter bed. The delay time is also adjustable. If after the time delay the liquid level sensor is still energized by a higher-than-normal water level over the filter media, the bed is automatically backwashed for a predetermine time, usually four to ten minutes. After the backwash cycle is complete, a delay in the cam times allows sufficient time for the filter cell to resume normal operation before automatically resetting to the start position.

FORM 360-1

PROGRAMMED BACKWASH

A 24-hour time clock shall be provided that can be programmed to automatically initiate the backwash sequence one or more times during the day. The tin1e clock shall include a time of day indicator and shall be easily set by hand.

MANUAL BACKWASH

A hand-off-auto (HOA) switch shall be provided for each filter chamber. Manual backwashing of each filter bed may be initiated by turning the HOA switch to the hand position. The backwash system shall stay activated as long as this switch stays in the hand position.

SAFETY GUARD

To insure safe operation of the backwash pumps there is installed a differential float switch in the clearwell. During backwashing if insufficient water is in the clearwell the backwash pumps will automatically shut down and remain inoperable until sufficient water has been collected in the clearwell the allow backwashing to continue.

WASTEWATER PUMP OPERATION

There shall be furnished and installed in the wastewater chamber, three float switches to initiate operation of the wastewater pumps. The function of each float switch shall be as follows when the HOA switch for each pump is in the auto position:

Float switch # 1 :

Float switch #2:

Float switch #3:

Float switch #4:

switches all pumps off switches lead pump on switches both pumps on activates alarm and shuts backwash operation down

The setting of these switches shall be as shown on the attached drawings.

The wastewater pumps may also be operated manually by turning the HOA switch to hand position. The pump(s) shall remain activated as long as the switch remains in the hand position.

SURGE CONTROL

To prevent surge of the secondary sewage treatment plant if a surge control system is not part of the system, a surge control valve is located in the…