Application of energy spilling mechanism by para-nitrophenol in biological excess sludge reduction in batch-activated sludge reactor

Abstract

Reduction of biomass production coefficient is an ideal solution for the reduction of excess sludge especially in industrial wastewater treatment plants. Studies were carried out in two sequencing batch reactors, which were controlled online. After presenting a stable situation in reactors, during 24 months of the study, sampling and examining of chemical oxygen demand (COD), biochemical oxygen demand, pH, sludge volume index (SVI), specific oxygen uptake rate (SOUR), remaining p NP, and biomass yield (Y) were implemented.