三氯苯酚对A^2／O工艺污泥产率的影响

应用2，4，5-三氯苯酚（TCP）作为化学解偶联剂投加到A2／O工艺中进行试验，在A^2／O连续流工艺中研究TCP不同投加方式对试验的影响，结果表明：在保持TCP总投加量相同的情况下，采用大剂量一次性投加的污泥减量效果比小剂量分次投加的效果好。即每两天投加240mg TCP，污泥产量比对照下降了67．10％，而每天投加120mg TCP，污泥产量比对照仅下降了35．90％。A^2／O工艺中COD的去除能力有所下降，当一次性投加240mgTCP时，COD的去除率比对照下降了26．80％，但出水氨氮和总氮的浓度未受多大影响，磷的去除率有些下降，SVI有所上升，但是没有严重影响污泥的沉降性能。

Effect of 2,4,5-Trichlovophenol on A~2/O Process Sludge Yields

2,4,5 -triehlovophenol（TCP）, served as metabolic uncoupler, was added to A^2/O process, and was studied in different dosage mode. The results showed that： while maintaining the total dosage of the TCP, large - dosage one - time addition is better than small - dosage split addition. TCP was able to reduce sludge yield by 67.10% when the TCP dosage was 240 mg ·（2d）^-1, but sludge production was only reduced by 35.90% if TCP was added 120 mg every day. The COD removal capability was decreased by 26. 80% when dosed 240 mg TCP every other day, but effluent nitrogen concentration was not affected adversely by the presence of TCP regardless of any dosage mode, the removal efficiency of phosphorus was slightly decreased, SVI of sludge were slightly increased by addition of TCP, but did not seriously affect the sludge settleability.