SPECS-Final-DI Water Treatment System Spec Sheet_Jul2020.docx

Specification Sheet Portable Ultrapure Deionized (DI) Water Purification System for Shipboard Use

NOAA requires a DI Water treatment system. Requirements include:

1) Capable of producing 100 L/day of Type I ultrapure 18.2 MΩ⸱cm water at 25 °C at a rate of 2L per minute using shipboard water supplied at 20-60 psi. Final product water must be on-demand with no storage tank required. Final resistivity needs to be measured and displayed accurately and precisely (0.01 cell constant for resistivity and 0.1 sensitivity for temperature) and meet United States Pharmacopeia (USP) requirements.

2) The system needs to be able to purify the shipboard drinking water (typically made from seawater by reverse osmosis or evaporators). Shipboard drinking water quality varies from ship to ship and often contains a higher level of residual silicate and other salts as well as high levels of chlorine or bromine that quickly exhaust the expensive final purifying resin packs. For this reason, a pre-treatment system to supply the final purifier, consisting of active charcoal to address the bromine or chlorine and dissolved organic material and high capacity DI resin to address the high silicate and other residual seawater salts/ions is required. This pre-treatment must supply water on-demand with not tank at a rate equal to or above that outlined in #1 above. The resin packs, charcoal pack and any filters must be easily and quickly replaceable and a monitoring system or warning light must provide feedback to alert the user when it is time to replace the expendable components.

3) The pre-treatment and final systems must not produce waste water byproduct as the fresh water supply onboard the vessels is limited. This requirement eliminates using Electronic Deionization (EDI) or Reverse Osmosis (RO) as a strategy to address point #2 above to produce feed water for the final purifier because those methods produce a significant fresh water waste stream of up to 90% of the shipboard feedwater used depending on ship water quality.

4) The system must have a 0.22 µm point of use filter (microorganisms <0.01 cfu/mL).

5) The system must produce pH neutral water.

6) The system must have the ability to add on or upgrade to ultrafiltration or post filtration (such as the point of use EMD-Millipore Biopack) to reduce RNases and DNases for specific projects requiring this type of water. This requirement is not necessary for all research cruises, so it should be an optional add-on or temporary upgrade that can be removed when not needed.

7) The system must have a remote dispenser that facilitates filling different container sizes away from the main unit.

8) The system must recirculate the internal water when not in use to maintain high water quality.

9) Include expendable supplies for 1-3 years (6-24 weeks of yearly operation of ~20-100 L/day).

10) The system needs to be portable and easily installed, removed and reinstalled on various different ship platforms in under 1-3 hours by scientists aboard and used continually for 2-8 weeks. The installation and removal process must not require any engineering modification aboard the vessel.

11) The system must be able to log water volumes passed through the final resin packs, alert the user when expendables need to be replaced and be able to provide volumetric dispensing for different size containers or carboys.

12) Total Organic Carbon (TOC) must be reduced to <5ppb and measured.

13) Must use Mercury Free UV lights.

14) Final purifier weight: not to exceed 50 lbs.

15) Electrical requirements: capable of using 100-240 V at 50-60 Hz.

16) Dimensions: the main unit (not including remote dispenser) should not exceed 12” x 15” x 24” (W x D x H) to allow it to fit on a shipboard laboratory benchtop or be mounted on a wall over a bench.

17) Demonstrated history of company reliability, longevity, service and support.