以稻秆为固体碳源处理分散养猪冲洗水的试验研究
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2020-04-10 21:11:40
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中国环境科学2015,35(7):2052~2058ChinaEnvironmentalScience以稻秆为固体碳源处理分散养猪冲洗水的试验研究宋爱红,。,沈志强,周岳溪,,刘珊,肖宇,,.,苗莹,,(1.长安大学环境科学与工程学院,陕西西安710054;2.中国环境科学研究院水污染控制技术研究中心,北京100012;3.中国环境科学研究院环境基准与风险评估国家重点实验室,北京100012;4.兰州交通大学环境与市政工程学院,甘肃兰州730070)摘要:针对分散养猪废水经厌氧和人工湿地处理后存在C/N低的问题,以廉价的稻秆作为固体碳源和生物膜载体,研究反应器启动阶段运行性能、水力负荷的影响以及污染物沿程去除特性.结果表明NO3—N主要在反应器上部稻秆填充层被去除,去除率超过95%,且无明显NO2—N积累,反硝化速率为O.052mg/(g.h).稻秆本身会浸出释放有机物和氮(主要为NH4十一N),导致运行前期出水COD和NI-h—N高于进水,但仍远低于《畜禽养殖业污染物排放标准》(GB18596—2001)的排放限值,40d后COD逐步降至40mg/L左右.COD和NO3—N可在反应器下部的砖渣填充层被进一步去除.关键词:稻秆;固体碳源;反硝化;分散养猪废水中图分类号:X703文献标识码:A文章编号:1000—6923(2015)07—2052—07Researchontreatingdispersedpiggeryrinsewaterusingricestrawassolidcarbonsource.SONGAi-hong’,SHENZhi.qiang,ZHOUYue.xi,,LIUShan,XIAOyu2,。,MIAOYing,,。(InstituteofEnvironmentalScienceandEngineering,Chang’anUniversity,Xian710054,China;ResearchCenterofWaterPollutionControlTechnology,ChineseResearchAcademyofEnvironmentalSciences,Beijing100012,China;StateKeyLaboratoryofEnvironmentalCriteriaandRiskAssessment,ChineseResearchAcademyofEnvironmentalSciences,Beijing100012,China;InstituteofEnvironmentalandMunicipalEngineering,LanzhouJiaotongUniversity,Lanzhou730070,China).ChinaEnvironmentalScience,2015,35(7):2052~2058Abstract:AgainstthelowC/Nrationindispersedpiggerywastewaterafterthetreatmentofanaerobicandconstructedwetland,usinglow·costricestrawassolidcarbonsourceandbiofilmcarriertostudytheperformanceinstart-upstage,theefectofhydraulicloadingandpollutantsremovalprofilealongtheheightofthereactorwereinvestigated.TheresultsshowedthattheNO3一Nwasremovedmainlyinthetoplayerofthereactor,whichfilledwithricestraw.TheremovalrateofNO3-Nwasover95%andthedenitrificationratewasO.052mg/(g.h),theefluentwithoutobviousaccumulationofNO2一N,simultaneously.Inaddition,theCODandNH4+-Nofefluentwashigherthantheinfiuentattheearlystageowingtothericestrawitselfleachingorganicandnitrogensubstance(mainlyisNH4+-N),buttheconcentrationwasstillmuchlessthantheemissionlimitsofdischargestandardofpollutantsforlivestockandpoultrybreeding(GB18596—200
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