Nitrogen and Phosphorus Removal in Lab-Scale Activated Sludge Systems

Abstract

The phenomenon of anoxic phosphate uptake with simultaneous denitrification was studied. Experiments have been carried out with biological nutrient removal in a single sludge system by using the activated slude samples from the modifications of nutrient removal activated sludge systems. The lab-scale reactor allows nitrification,
denitrification and phosphorus removal alternatively by adding
anaerobic, anoxic zone prior to activated sludge system. The aim
of the study was to evaluate the denitriication behaviour in biological
excess phosphorus removal activated sludge systems. Based on
experimental study, the performance of the system for the KOI,
NH₄ and phosphorus parameters was reported. The study indicates
that a significant fraction of the polyphosphorus organisms can be
used as an electron acceptor in the absence of oxygen for oxidation
of stored PHB and simultaneous uptake of phosphorus.