August 2018

Water Management

Options for meeting wastewater effluent selenium limits

Wastewater treatment units (WWTUs) in petroleum refineries are designed to meet effluent limitations incorporated into National Pollutant Discharge Elimination System (NPDES) permits for “conventional pollutants.”

Gerhardt, M., Steinwinder, T., Brown and Caldwell

Wastewater treatment units (WWTUs) in petroleum refineries are designed to meet effluent limitations incorporated into National Pollutant Discharge Elimination System (NPDES) permits for “conventional pollutants.” These pollutants include oil and grease, biochemical oxygen demand (BOD5), chemical oxygen demand (COD), chromium, sulfide, phenolic compounds, pH, ammonia and total suspended solids (TSS). The technology-based effluent limitations were originally promulgated by the US Environmental Protection Agency (EPA) for the Petroleum Refining Point Source Category [40 Code of Federal Regulations (CFR) Part 419] in 1974, with amendments in 1975, 1977, 1982 and 1985. Technology is well establi

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