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Nitrogen and phosphorous removal for low temperture waste water with inverted A2/O technology

LI Siqiang,ZHANG Lei,Jiang AnxiLI Siqiang,ZHANG Lei,Jiang Anxi

  

  1. The School Property Agency Department,Daqing Petroleum Institute;The Earth Sciences Department,Daqing Petroleum Institute;School of Municiple and Environment Engeering,Harbin Insitute of Technology

  • Online:2009-11-05 Published:2009-11-05

改良倒置A2/O工艺处理低温生活污水技术

李思强,张 雷,姜安玺

  

  1. 大庆石油学院校办产业处;大庆石油学院地球科学学院; 哈尔滨工业大学市政环境工程学院

Abstract: The phosphorus removal by the biological nutrient removal system depends on the exclusion of excess sludgewhich requires short SRT micro-organismswhile the nitrifying bacteria is autotrophicits growth requires a longer time. At low temperature (10)the nitrification sludge age is generally 1520 dand PAOs sludge age is 45dthis enormous gap resulted in the difficult to achieve simultaneously nitrogen and phosphorus removal at low temperature with the A2/O process. Thusthe effect of nitrogen and phosphorus removal using improved inverted A2/O process is studiedthrough 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 processthe effluent can reach the national emission standards for secondary water.

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15~20 d,而聚磷菌泥龄为4~5 d,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。

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