Study on Partial Nitrification-Anaerobic Ammonium Oxidation-Nitrification Coupled Technology for the Treatment of Coking Wastewater

Abstract

Partial nitrification-anaerobic ammonium oxidation-nitrification coupled technology was used for removing nitrogen from coking wastewater. Through continuous optimization of the nitrogen removal technology, NH4+-N, NO2--N and NO3--N concentrations in the effluent stabilized at 0~3, 0~0.5 and 5~20 mg/L, COD<100 mg/L, the effluent quality could meet the primary standard of “Integrated wastewater discharge standard (GB8978-1996)”. The removal efficiencies of NH4+-N and COD reached up to 99.5% and 96.1% respectively. The novel technology performed well for treating coking wastewater, nitrogen and organic pollutants were simultaneously removed efficiently.