UNSPSC 47101545: Rotating biological contactor RBC

A device that disintegrates and processes the impure substances in waste water by delivering the oxygen in the air when it is exposed to the atmosphere and consuming the organic material by the inorganic materials when the circular plate is rotated to wet the reaction vessel.

UNSPSC 47101545 Rotating biological contactor RBC is a Commodity code that names equipment used in wastewater and water treatment aeration systems. State and local governments procure RBC units, aeration equipment components, diffusers, and related parts and services to support municipal treatment plant operations, though the code shows little direct purchasing activity in recent solicitations. Instead, state and local procurement under related aeration and treatment equipment codes clusters around diffuser replacement, membrane diffuser supply and maintenance contracts, treatment plant upgrades incorporating advanced oxidation and membrane technologies, chemical treatment systems, and comprehensive facility rehabilitation projects that integrate aeration or secondary treatment systems as components of larger capital improvements.

The most active recent buyers are city water and wastewater departments, county water utilities, special districts, and regional treatment authorities across Florida, Georgia, Texas, Arizona, and California. Representative recent solicitations include the City of Phoenix's IFB-26-0382 for Sanitaire membrane diffusers (offers due July 2, 2026) serving two wastewater treatment plants with 11 aeration basins and approximately 10,000–12,000 diffusers per basin, and the City of Winter Park's single-source procurement for Sanitaire dome diffuser replacement parts ($75,000 FY2026 budget). Broader treatment plant upgrade and construction projects—such as Collier County's $3.29 million South County Regional Water Treatment Plant lime softening improvements (bids due July 15, 2026), Orange County's $11.008 million Eastern Regional Water Supply Facility VFD and tank improvements (bids due June 9, 2026), and the City of Calhoun's CMAR construction manager at risk procurement for reverse osmosis and microfiltration pretreatment systems at two drinking water facilities (proposals due July 30, 2026)—frequently include aeration, oxidation, or secondary treatment as subordinate system components rather than standalone RBC procurements. The code itself generates minimal standalone opportunities; procurement activity is concentrated in regional wastewater districts in Florida and Georgia and in large municipal systems in Texas and California. Geographic concentration appears strongest in Florida (Collier County, Tampa, Winter Park, Palm Bay, Seminole County), Georgia (Gwinnett County, Athens-Clarke County, Effingham County, Columbia County, LaGrange), and Texas (Waxahachie, Huntsville). Activity is widespread but thin; most RBC-related purchasing is embedded in larger water quality or treatment plant modernization solicitations rather than appearing as discrete equipment buys.