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1、华东理工大学硕士学位论文第I页生物坝技术处理受污染河水的研究摘要本论文研究了上海市西南地区北新径、潜河}l,张家塘和华东理工大学校内青春河等四条中小河流的水质特征,分析结果表明这四条河流均受到子不同程度的污染,COD,BOD和NH3一等水质指标均处于国家地表水1Y-劣V类水质,尤其是NH3-N指标是国家地表水水质标准的6倍以上。通过BOD/COD得出,北新经和潜河径河水的可生化性较好,可以采用生物处理:而张家塘和青春河水的可生化性较差,但是利用生物处理可以去除大部分NH3-N。本论文还研究了Lantec填料的各项性能,并与另外一种球型填料作了充氧性能对比,结果表明,在穿孔曝
2、气条件下,600/0该充率时氧传递系数较高,Lantec填料充氧性能优于用以对比的填料。在此基础上,以潜河径桂林公园段为试验对象,作了现场模拟试验。采用60%填充率L知捷c填料,布置方式采用折流式和截流式两种,现场模拟试验表明,生物坝技术处理受污染河水是可行的。折流式生物坝HR7,为3.3h,气水比为6-7:1时,COD,BOD和NH3一去除率分别为41.6%,87,3%,42.7%>截流式生物坝HRT为2.2h,气水比为8-Id:1时,COD,BOD和NH3一去除率分别为38.6%,76.2%,14.4%e受水温影响,折流式生物坝和截流式生物坝的去除效果没有解显差别。但折
3、流式可减少填料用量和投资成本。关键词:生物龚物憾污染河流:生物膜A交株第I页华东理工大学硕士学位论文Studyonbio-damtechnologyfortreatingpollutedriverwaterAbstractInthispaperthewaterqualityoffourriverslocatedinsouthwestofShanghai,i.e.,Beixinjing,Caohejing,ZhangjiatangandQingchunRiveroncampusofECUST,wasinvestigated.Theresultsshowedthatthefou
4、rriverswerepolluted.COD,BODandNH3-Ninthemwerehigherthanthenationalstandardforsurfacewaterquality.Especially,NH3-Nconcentrationwas6timeslargerthanthestandard.BycalculatingBOD/COD,thepollutantsinBeixinjingandCaohejingriverwaterwereeasytobebiodegradedandthoseinZhangjiatangandQingchunRiverwate
5、rwerenot,however,themostofNH3-Ninthelatercouldberemoved衍biodegradation.ThecharacteristicofLantecpackingwasinvestigatedanditsefectonaerationeficiencieswascomparedwithanotherlightsphericalpacking.Theresultsindicatedthattheaerationeficiency勿employingLantecpackingwashigherthantheotherunderthec
6、onditionsof60%offillingrate.Thenon-the-spotsimulatingexperimentwascarriedoutnearthereachofGuilinParkofCaohejingriverundertheconditionof60%offillingrate,andthecurrentstylesinthebio-damweresemi-blockingandblocking.Theresultsshowedthatbio-damwasfeasibletotreatpollutedriverwater.Whensemi-block
7、ingbio-damwasusedtotreattheriverwater,theHRTwas3.3h,air/waterratiowas6-7:1,theremovalrateofCOD,BOD,NH3-Nwas41.6%,87.3%,42.7%,respectively.Whenblockingbio-damwasuse氏theHRTwas2.2h,air/waterratiowas8-10:1,theremovalrateofCOD,BOD,NH3-Nwas38.6%,76.2%,14.4%respectiv