解偶联代谢对活性污泥工艺中剩余污泥的减量化作用

Reduction of Excess Sludge Production by Uncoupled Metabolism in Activated Sludge Process

为了有效减少活性污泥法中剩余污泥的产生,采用解偶联剂对活性污泥工艺中的剩余污泥进行减量化研究。研究比较了5种化学解偶联剂对活性污泥系统的污泥减量化短期效应以及对基质去除率的影响,并对影响其作用的因素和解偶联剂在水和污泥中的分布进行了研究。结果表明:不同的解偶联剂,减量化效果差异明显,硝基类化合物比含氯类化合物的污泥减量化效果好。所有解偶联剂在对微生物进行解偶联的过程中并不影响微生物对基质的降解去除效果。污泥产率随着解偶联剂浓度的增加而减少,随着污泥浓度的增加而增加;在实验所选择的温度范围内(20℃～30℃),温度对解偶联作用的影响甚小;酸性条件能提高解偶联剂对污泥的减量效果。

Reduction of excess sludge production in activated sludge process was examined by utilizing different uncouplers.Effects of various parameters such as uncouplers concentration,sludge concentration,temperature and pH were investigated.The experimental data show that sludge yield was different with different uncouper,and the performance of nitrophenols were better than that of chlorophenols.The organics removal rate was not affected after the uncouplers being added into the system.The Yobs were decreased with the increasing of the concentration of uncouplers,and increased with the increasing of the concentration of sludge.The temperature has little effect on reducing sludge yield at the experimental temperature range（20 ℃～30 ℃）.And acidic conditions can improve performance of uncouper on reducing sludge yield.