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TREATING WOOD PRESERVING PLANT WASTEWATER BY CHEMICAL AND BIOLOGICAL METHODS
Citation:
White, J., T. Bursztynsky, J. Crane, AND R. Jones. TREATING WOOD PRESERVING PLANT WASTEWATER BY CHEMICAL AND BIOLOGICAL METHODS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-76/231.
Description:
A completely mixed activated sludge system was designed for a wood preserving plant with an average daily wastewater flow of 27,000 l/day (7,150 gal/day), a BOD concentration of 1,100 mg/l, and a phenol concentration of 120 mg/l. Included in the design were capabilities for pre- and post-chlorination. The activated sludge system alone was capable of removing 90 percent BOD, 75 percent COD, 99 percent phenol, and 76 percent pentachlorophenol. Post chlorination dosages of over 50 mg/l resulted in 50 and 52 percent reductions of phenol and pentachlorophenol, respectively. Laboratory pre-chlorination studies showed removal of phenol and pentachlorophenol at chlorine dosages in excess of 250 mg/l.