温度对复合厌氧折流板膜生物反应器处理生活污水效能的影响

将新型CAMBR反应器（厌氧折流板反应器（ABR）与膜生物反应器（MBR）优化组合）用于处理生活污水，研究温度对该反应器处理效能的影响。实验水力停留时间7．5h，混合液回流比设置为200％，pH值为6．5～8．5，溶解氧3mg／L左右。控制3个温度梯度：高温（32～37％），中温（20～25℃），低温（5～10％），每个温度运行35d。结果表明，在高温条件下，系统出水COD、NH4．N、TN和TP平均浓度分别为25、0．5、12．5和0．7mg／L。在中温条件下，系统出水COD、NH4＋-N、TN和TP浓度分别30、1．2、12．5和0．4mg／L。在低温条件下，COD和TP分别经过15d和20d调整适应，出水可恢复至35mg／L和1mg／L。由于低温（10％以下）对硝化细菌产生强烈抑制，出水NH4＋-N去除率最终稳定在35％，TN去除率为40％。低温条件下，该反应器应用于污水处理中需注意适当保温，以保证出水水质。

Effect of temperature on complex anaerobic baffled membrane reactor for domestic sewage treatment

The effect of temperature on CAMBR（combined ABR and MBR）for domestic sewage treatment was investigated. The operational conditions of HRT, recycle ratio, pH and DO were 7.5 h, 150% , 6.5 ℃8.5 and 3 mg/L, respectively. Three temperature gradients were controlled： high temperature （32 - 37℃ ） , temper- ature （20 -25℃ ）, low temperature （5 - 10℃）. Each temperature operated for 35 days. The results show that the average effluent concentration of COD, NH4 -N, TN and TP were 25, 0.5, 12.5 and 0.7 mg/L at high tem- perature, respectively. The effluent of COD, NH4-N, TN and TP were 30, 1.2, 12.5 and 0.4 mg/L at medi- um temperature, respectively. At low temperature, the effluent concentration of COD and TP recovered to 35 mg/L and 1 mg/L after 15 d and 20 d, respectively. Nitrifying bacteria were inhibited strongly at low tempera- ture （10℃） , NH4-N removal rate was only 35% and TN removal rate was 40%. So, the CAMBR should be kept warm to ensure good effluent quality at low temperature.