重金属对活性污泥系统影响的研究进展

Research progress in effect of heavy metal on activated sludge system

综述了常见重金属对活性污泥系统影响的研究,如碳、氮、磷的去除,胞外聚合物含量变化及微生物群落的影响,同时探讨了重金属的毒性机理。最后总结了该领域研究的不足,并对今后研究进行了展望。

Heavy metals are widely existed in industrial wastewater.Although trace heavy metals are essential for the growth and metabolism of microorganisms,they might have toxic effects on microorganisms when their concentration exceeds a certain limit.There are hardly comprehensive and systematic reports concerning the possible impacts of heavy metals on the activated sludge system.Therefore,this paper summarizes the potential influences of commonly used heavy metals on the activated sludge system,such as the removal of carbon,nitrogen and phosphorus,the changes of extracellular polymer substances content and microbial communities. Also,the toxicity mechanism of heavy metals is discussed.Finally,the shortages and development direction of researches on this field are analyzed.This review provides a theoretical basis on further investigation of the potential effects of heavy metals on the activated sludge system.