Facing new OCPSF (organic chemicals, plastics, and synthetic fibers) requirements for effluent discharge, the Nalco Chemical Co. plant at Garyville, LA, had to make changes in its wastewater treatment operation.

Three isolated waste streams are generated in the manufacturing of specialty chemicals Nalco supplies to the water treatment chemical markets, and contain various monomers.

While they represent only 10 percent of the hydraulic flow, TOC (total organic carbon) levels can range from 1,000 parts per million to 10,000 ppm. The streams are also odorous.

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