铜离子与解偶联剂协同下的污泥减量作用

采用间歇式活性污泥培养装置,以2,6-二氯苯酚（DCP）作为解偶联剂,浓度为20 mg/L,Cu^2＋浓度为1 mg/L,加入到间歇式活性污泥反应器中.通过30　d的连续运行发现,COD去除效率相比对照实验下降7％,污泥减量达75％,且出水中DCP的平均浓度为0.28 mg/L,Cu^２＋的去除率达到90％以上,但污泥沉降性和污泥对N、P的去除率下降,污泥活性也降低.镜检发现,污泥中丝状菌增多,原生动物和后生动物数量和种类减少.结果表明,Cu^２＋和DCP对污泥减量有明显的协同作用,在活性污泥工艺中运用铜离子和解偶联剂联合来限制污泥产率是可行的.

Reduction of excess sludge production by cooperation action of Cu2+ and uncoupler

This research was on sequencing batch reactor activated sludge system, using 2,6-dichlorophenol as uncoupler with the concentration of 20(mg/L),using Cu~(2 ) with the concentration of 1(mg/L),adding into the SBR activated sludge system.Through 30 days continuously operation,we discovered that the removal efficiencies of COD was 7% lower than the control experiment,and sludge reduction would reach 75%,while the average concentration of 2,6-dichlorophenol was 0.28 (mg/L) in the effluent,and the removal efficiency of Cu~(2 ) was over 90%.But the sludge settleability and the removal efficiencies of nitrogen and phosphorus dropped,as well as sludge activity.According to the microscope examine,we discovered filamentous bacteria in the sludge increased,while quantity and type of protozoon and metazoa reduced.The result indicated that Cu~(2 ) and 2,6-dichlorophenol had the obvious cooperation to the sludge reduction,so using Cu~(2 ) and uncoupler to limit the sludge yield in the activated sludge system was feasible.