改良倒置A^2/O工艺处理低温生活污水技术  

Nitrogen and phosphorous removal for low temperture waste water with inverted A^2/O technology

作　　者：李思强[1] 张雷[2] 姜安玺[3] 

机构地区：[1]大庆石油学院校办产业处,黑龙江大庆163318 [2]大庆石油学院地球科学学院,黑龙江大庆163318 [3]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090

出　　处：《化工进展》2009年第11期2068-2071,共4页Chemical Industry and Engineering Progress

摘　　要：生物脱氮除磷系统中磷的去除通过排放剩余污泥实现,需要短泥龄微生物;而硝化细菌为自养菌,需要较长的生长时间。在低温(≤10℃)条件下,硝化污泥泥龄一般为15～20d,而聚磷菌泥龄为4～5d,这种巨大的泥龄差距导致现有A2/O在低温下很难实现同时脱氮除磷。本文利用改良的倒置A2/O工艺,研究了低温条件下的生物脱氮除磷效果。结果显示:该工艺低温条件下COD的去除率在85%以上,氨氮去除率低温条件下可达到85%,磷的去除率低温条件下为80%,出水能够达到国家二级排放标准。The phosphorus removal by the biological nutrient removal system depends on the exclusion of excess sludge, which requires short SRT micro-organisms; while the nitrifying bacteria is autotrophic, its growth requires a longer time. At low temperature （≤10℃）, the nitrification sludge age is generally 15--20 d, and PAOs sludge age is 4--5d, this enormous gap resulted in the difficult to achieve simultaneously nitrogen and phosphorus removal at low temperature with the A2/O process. Thus, the effect of nitrogen and phosphorus removal using improved inverted A2/O process is studied, through which the COD removal rate of higher than 85%, NH4＋-N removal of 85% and T-P removal efficiency of 80 % were achieved at low temperature conditions. With this improved inverted A2/O process, the effluent can reach the national emission standards for secondary water.

关 键 词：倒置A2/O工艺 固定化 耐低温硝化细菌 低温 

分 类 号：X703[环境科学与工程—环境工程]