关键词: 活性污泥法, 污泥减量, 寡毛类蠕虫

Abstract: Advances in sludge reduction induced by oligochaetes and their growth kinetics are thoroughly reviewed. Stable presence, growth and reproduction of oligochaetes in activated sludge system, both affecting their predation on sludge and their capacity of sludge reduction, are significantly influenced by such factors as substrate characteristics, environmental conditions, population density of oligochaetes, except for their different species. Based on direct weighing, the observed sludge yield coefficient is not considered as suitable to evaluate the real capacity of sludge reduction of biomass by oligochaetes, because this method can be easily affected by lots of factors in activated sludge process. Whereas, isotope tracing provides a new way to more effectively evaluate the capacity of sludge reduction and screen worms suitable for sludge reduction of biomass. In addition, worms can improve the sludge settling, and should be considered in sludge reduction of volume.

Key words: activated sludge process, sludge reduction, oligochaetes