活性污泥法脱氮工艺改进_王明星

活性污泥法脱氮工艺改进王明星　张洪林　蒋林时　冯志力(辽宁石油化工大学环境工程系　辽宁抚顺113001)　　摘　要　用生物膜法对锦州石化公司A/O2活性污泥法脱氮工艺进行改进,考察了工艺各段对总氮去除率的影响。研究结果表明:挂膜后一级好氧池内COD及NH3-N的去除率分别达到78.5%和94.3%;将二级好氧池改为缺氧池挂膜,并加入适量甲醇,可使NO-3-N去除率达到80%以上。　　关键词　脱氮　膜法　硝化ImprovementonDenitrificationProcessbyActivatedSludgeWangMingxing　ZhangHonglin　JiangLinshi　FengZhili(Dept.ofEnvironmentEngineering,LiaoningUniversityofPetroleum&ChemicalTechnology　Fushun,Liaoning113001)Abstract　ThebiofilmprocessisconductedinthewastewatertreatmentatJinzhouPetrochimicalCompanyinsteadofA/O2activatedsludgeprocess.Theeffectsofdifferentstageintheprocessontotalnitrogenremovalarestudied.Theresultsshowthataftercarryingoutbiofilminthefirstaerobictank,theremovalofCODandNH3-Ncomesupto78.5%and94.3%respectively.substitutingtheanoxicbasinforthesecondaerobictankandsupplementingmoderatemethanol,theremovalofNO-3-Nwillbeover80%.Keywords　denitrification　biofilmprocess　nitrification　　A/O2活性污泥法处理含氮废水是一种比较有效的方法,但在有些污水处理厂其脱氮效果却不尽人意,以锦州石油六厂水处理车间为例,长期的运行结果表明:该工艺对COD去除效果较好,而在硝态液回流比为100%的情况下