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PHYSICAL-CHEMICAL TREATMENT OF A MUNICIPAL WASTEWATER USING POWDERED CARBON. NO. II
Citation:
Burns, D., R. Wallace, AND D. Cook. PHYSICAL-CHEMICAL TREATMENT OF A MUNICIPAL WASTEWATER USING POWDERED CARBON. NO. II. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-76/235.
Description:
Salt Lake City municipal wastewater was treated in a nominal 100 gpm pilot plant by chemical coagulation-precipitation, powdered activated carbon adsorption and granular media filtration. Chemical-primary sludge was gravity thickened and vacuum filter dewatered. Spent carbon was gravity thickened, vacuum filter dewatered and thermally regenerated in a fluidized bed furnace. Solids-contact units were used for chemical treatment and carbon contacting. Soluble organic materials were found to be removed by a combination of chemical coagulation, anaerobic biological activity and adsorption on powdered carbon. Spent powdered carbon was effectively regenerated with an average fixed carbon recovery of 90 percent. Lime and alum-primary sludges were effectively dewatered by vacuum filtration. A high quality effluent was consistently produced, similar to that expected for conventional biological treatment followed by tertiary treatment for phosphorus and suspended solids removal.