黄河微污染水源饮用水生物预处理研究

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1、摘要黄河微污染水源饮用水生物预处理研究学科名称环境工程作者姓名周卫军作者签名导师姓名党志良导师签名导师职称教授答辩日期2005.3摘要通过建立生物陶粒滤池与常规工艺相结合的饮用水处理试验模型对以有机物+NH4-NNO2N藻类等为主要污染物的黄河微污染原水进行处理确立了工艺各单元运行参数考察了生物陶粒预处理工艺去除黄河原水中微污染物的效果影响因素以及对后续常规工艺的影响结果表明32(1)在气水比0.251水力停留时间23.6min水力负荷5.1m/mh的试验条件下,生物陶粒预处理工艺对黄河微污染原水中的CODMn有一定

2、的去除效果,平均去+除率为14.4%对NH4-NNO2N藻类有较好的去除效果平均去除率分别为73.5%83.8%33.8%生物陶粒对黄河水质的季节性变化有较好的适应性(2)生物陶粒除微污染的效率随水温的升高有所提高,低温时各项污染物的去除32率未受到显著影响生物滤池仍具有良好的生物活性将水力负荷由5.1m/mh降低32+至3m/mhCODMnNH4-NNO2N去除率无明显提高但藻类去除率有了明显提高达到54%(3)生物陶粒对后续常规净水工艺除污染具有明显的强化作用使后续常规工艺中混凝剂和消毒剂的用量分别减少了21.5

3、%和18%在改善水质的同时具有一定的经济效益本试验为以黄河水为水源的水厂生物预处理工艺的设计和运行提供试验数据为其它类似水源水的处理提供参考和借鉴关键词生物陶粒预处理微污染原水黄河I西安理工大学硕士学位论文EXPERIMENTALRESEARCHONBIO-CERAMICFILTERPRETREATMENTFORYELLOWRIVERMICRO-POLLUTEDWATERAUTHOR:ADVISOR:ENVIRONMENTENGINEERINGDIRECTOR:TITLE:PROFESSORAbstractInthi

4、sresearch,bio-ceramicfilterwasstudiedforpretreatmentofmicro-pollutedsourcewaterfromYellowRiver.Furthermore,severalprocessparameterssignificantlyaffectingtheperformanceofbio-pretreatmentanditseffectsonthesubsequentconventionaltreatmentprocessweretested.Theresult

5、softhisresearchwerelistedasfollows:321whengas/waterratiois0.25:1andthehydraulicloadis5.1m/mh,bio-ceramic+—filtercaneffectivelyremovemicro-pollutantssuchasCODMnNH4-NNO2Nandalgae,Theaverageremovalefficiencyis14.4%73.5%83.8%33.8%respectlyanditwelladaptedtodifferen

6、twaterqualitiesduetoseasonalchange.2Themicro-pollutantsremovalefficiencywasimprovedbyincreasingoperationaltemperature,whilethereisnosignificanteffectonremovalefficiencyunderlowotemperature:thebiomassactivitywasstillhighevenbelow5C.Theresearchresults32showedthat

7、whenhydraulicloadreducedto3m/mh,bio-ciramicfiterhadnoeffecton+—removalefficiencyofCODMnNH4-NNO2N,butitenhancedthealgaeremovalefficiency.3Thebio-ceramicfilterpretreatmentsignificantlyenhancedtheremovalefficiencyofmicro-pollutantsinitssubsequenttreatmentprocess.T

8、hecoagulationanddisinfectionchemicalconsumptioninsubsequenttreatmentreducedby21.5%18%respectly.Therefore,apartfromimprovingsubsequenttreatmentefficiency,thebio-ceramicpretre