Title

In situ adaptation of activated sludge by shock loading to enhance treatment of high ammonia content petrochemical wastewater

Document Type

Article

Date of Original Version

1-1-1988

Abstract

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.

Publication Title

Journal of the Water Pollution Control Federation

Volume

60

Issue

7

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