COD对生物流化床法降低污泥回流液中氮磷的影响_李萍
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2020-02-24 10:15:51
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EffectofCODontheremovalofnitrogenandphosphorusinthereductionofconcentrationofsludgerefluxingliquidbybiologicalfluidizedbedLiPing1,LinHai1,HeJianmin2,ChenSongmei3(1.DepartmentofEnvironmentalEngineering,UniversityofScienceandTechnology,Beijing100083,China;2.ChongqingSteelGroupDesigningInstitute,Chongqing400082,China;3.YantaiXinhaiDesignandResearchInstituteofMiningMachineryCo.,Ltd.,Yantai265500,China)COD对生物流化床法降低污泥回流液中氮磷的影响李萍1,林海1,何建敏2,陈松梅3(1.北京科技大学环境工程系,北京100083;2.重钢集团设计院,重庆400082;3.烟台鑫海矿山机械有限公司设计研究院,山东烟台265500)[摘要]以市政污水处理厂污泥回流液为研究对象,研究了不同碳、氮、磷水平条件下生物流化床法脱氮除磷的情况,分析了COD/TN与COD/TP对生物流化床脱氮除磷的影响。结果表明,COD对脱氮影响不大,而对除磷具有较大影响。在COD为500mg/L,进水TN为115mg/L时,TN的去除率最大值为72.05%,此时,COD/TN为4.35。在COD为480mg/L,进水TP为11.25mg/L时的去除率较高为36.98%,此时COD/TP为42.67。生物流化床法对高浓度氮磷污泥回流液具有一定的脱氮除磷效果,TN去除率可达56.35%,TP去除率为28.96%。[关键词]生物流化床;污泥回流液;脱氮除磷[中图分类号]X703.1[文献标识码]A[文章编号]1005-829X(2009)09-0019-03Abstract:Thesludgerefluxingliquidinthemunicipalsewagetreatmentplanthasbeeninvestigationandthesituationthatremovingnitrogenandphosphoruswithbiologicalfluidizedbedunderdifferentlevelsofcarbon,nitrogenandphosphorushasbeenstudied.TheeffectsofCOD/TNandCOD/TPontheremovalofnitrogenandphosphorusbybiologicalfluidizedbedareanalyzed.TheresultsshowthatCODhaslittleeffectontheremovalofnitrogen,buthasbettereffectontheremovalofphosphorus.WhenCOD=500mg/LandtheTNininfluentwateris115mg/L,theremovalrateofTNreaches72.05%.Atthistime,theCOD/TNis4.35.WhenCOD=480mg/LandtheTPininfluentwateris11.25mg/L,theremovalrateis36.98%.Atthistime,theCOD/TPis42.67.Thebiologicalfluidizedbedhascertainremovaleffectonthereductionofsludgerefluxingliquidwithhighlyconcentratednitrogenandphosphorus.TheremovalrateofTNcanbeashighas56.35%andtheremovalrateofTPis28.96%.Keywords:biologicalfluidizedbed;sludgerefluxingliquid;removalofnitrogenandphosphorus试验研究[基金项目]“十一五”国家科技支撑计划重大项目(2006BAC19B01)第29卷第9期2009年9月工业水处理IndustrialWaterTreatmentVol.29No.9Sep.,2009由氮磷导致的水体富营养化问题已引起公众的普遍关注。污泥回流液作为市政污水处理厂污泥处理过程中产生的废水,尽管产量较小,但其氮磷负荷较高,其中TP约45.5mg/L、TN约150mg/L。目前,这部分废水通常被回流至污水处理厂进水
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