厌氧水解酸化-好氧氧化A1A2O工艺剩余污泥减量对系统运行效果的影响
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2020-04-29 12:56:43
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环境科学ENVIR0NMENTALSCIENCEVo1.28,No.6Jun.,2007厌氧水解酸化.好氧氧化A1/A2/O工艺剩余污泥减量对系统运行效果的影响杨波,陈季华,奚旦立,李方,田晴,许世梁(1.东华大学环境科学与工程学院,上海201620;2.上海市政工程设计研究院,上海200092)摘要:在碱减量印染废水A】,A2,0生物处理系统中,利用污泥回流可以实现对剩余污泥的有效减量.剩余污泥回流到Al段,增加了A1段中污泥的有机负荷,却提高了系统对COD的去除率.在Al段COD容积负荷2.54ks/(m3·d)、水力停留时间为9.45h和7.56h条件下,段COD的去除率分别由15.9%提升至23.9%,12.3%提升至22.8%.在进水COD浓度1000mg/L、A。段COD容积负荷2.54kg/(m3·d)、进水色度450倍、系统温度30℃条件下,段出水色度有污泥回流时较无污泥回流下降30%以上,系统出水的色度比无污泥回流时降低30%左右.回流剩余污泥使Al段出水pH略低于无污泥回流的情况,但对A2段和O段DH值影响不大.在有剩余污泥回流的系统中,系统各段出水的ss浓度均比无回流系统大.长期污泥回流会造成系统内难生物降解物质的积累,必须适时地进行排泥、气水冲刷等恢复系统污泥活性的措施.关键词:水解酸化;好氧氧化;污泥减量;A。,A2,0生物处理系统;碱减量印染废水中图分类号:X791:X705文献标识码:A文章编号:0250.3301(2007)06.1280.05RunningEfectsAfectedbySludgeReducingbyAnaerobicHydrolysis-acidificationandAerobicOxidationProcess0fA1/A2/oBio-treatmentSystemYANGBo‘,CHENji-hua,XIDan---li,LIFang,TIANQing,xuShi-liaIl(1.CollegeofEnvironmentalScienceandEngineering,DonghuaUniversity,Shanghai201620,China;2.ShanghaiMunicipleEngineeringDesignInstitute,Shanghai200092,China)Abstract:IntheAl/A2/Obio—treatmentsystemdealingwithalkaliminimizationanddyeing-printingwastewater,residualsludgecouldbereducedeffectivelybyrecyclingofsludge.TheCODremovalrateinAlsegmentcouldbeimprovedbyresidualsludgerecyclingtoA1segment.TheCODeliminationrateinAlsegmentwasraisedfrom15.9%to23.9%andfrom12.3%to22.8%whiletheCODvolumeloadingofAlsegmentwas2.54ks/(m3‘d)andtheHRTofA.was9.45hand7.56hrespectively.Therecyclingofsludgeisusefultocolorremovalofthesystem.WhentheCODofinfluxionwas1000mg/L,theCODvolumeloadingofA.was2.54kg/(‘d),thechromaofinfluxlonwas450andthetemperatureofthesystemwas30℃.thechromaremovalratewithsludgerecyclingdecreasedmorethan30%andabout30%comparedwiththesystemwithoutsludgerecyclinginAlsegmentandinthewholeprocessrespectively.ThepHinAlsegmentwithsludgerecyclingwasalittlelowerthanthatwithoutsludgerecycling,buttheperformanceofA2andOsegmentswasafectedlessseverelybysludgerecycling.TheSSineverysegmentwithsludgerecyclingwashigherthanthatwithoutsludgerecycling.Inertsubstancecouldbeaccumulatedbeca
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