低温下城市生活污水处理厂的调试运行  

Operation of Municipal Sewage Treatment Plant in Low Temperature

作　　者：尉国红 侯巧玲[1] 罗国强[1] 关云峰[1] 张璐[1] 

机构地区：[1]北京城建环保投资发展股份有限公司,北京100022

出　　处：《安全与环境工程》2010年第5期8-11,共4页Safety and Environmental Engineering

摘　　要：以河北大城县污水处理厂为例,探讨了低温对城市生活污水生物处理效果的影响,结果表明:在温度为20～25℃的范围内,经过2个月的培养驯化,该生物处理系统运行稳定,出水中各项指标均达到国家一级A排放标准;低温对COD的去除率没有显著影响,但降温对硝化菌有较大的影响,当水温降至10℃时,硝化效率降至85%;采取维持较高的污泥浓度、降低污泥负荷、适当增大溶解氧、延长泥龄等措施,当水温进一步降低至6℃时,NH3-N去除率基本可维持在75%以上,但是当水温降至5℃以下时,硝化反应几乎停止。The operation of Dacheng Sewage Treatment Plant in Hebei Province is introduced.In the temperature range of 20～25℃,the biological system is running in a stable way and all indicators reach A discharge standards after 2 months＇s cultivation and domestication.Low temperature has no significant impact on COD,but it has considerable impact on nitrifying bacteria.When the water temperature drops to 10℃,the nitrification efficiency drops to 85%.By maintaining high sludge concentration,lowering sludge load and increasing dissolved oxygen,the NH3-N removal rate can be basically maintained at 75% when the water temperature is further reduced to 6℃.But when the water temperature drops to 5℃,the nitration reaction almost stops.

关 键 词：生活污水 低温 硝化菌 硝化效率 

分 类 号：X703[环境科学与工程—环境工程]