In situ adaptation of activated sludge by shock loading to enhance treatment of high ammonia content petrochemical wastewater
Date of Original Version
A modified activated sludge process that includes both carbonaceous and nitrogenous oxidation to reduce high levels of ammonia in petrochemical wastewater was studied in a pilot plant design. Dissolved oxygen, pH, temperature, and sludge age were controlled and measured. Ammonia concentration in the petrochemical wastewater used as the influent waste to the pilot plant was maintained up to 390 mg/L. Adaptation of the activated sludge biomass to the influent was accomplished with step-function shock loading. Subsequently, operation in the zero sludge wasting mode resulted in a low excess sludge production rate and the minimization of nitrifier washout and high percentage removals of ammonia, COD, BOD, and sulfide were measured.
Journal of the Water Pollution Control Federation
Thiem, L. T., and E. A. Alkhatib. "In situ adaptation of activated sludge by shock loading to enhance treatment of high ammonia content petrochemical wastewater." Journal of the Water Pollution Control Federation 60, 7 (1988): 1245-1252. https://digitalcommons.uri.edu/cve_facpubs/370