水生植物滤床技术改善富营养化水体水质的研究

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1、东南大学博士学位论文水生植物滤床技术改善富营养化水体水质的研究姓名：宋海亮申请学位级别：博士专业：环境工程指导教师：吕锡武20050501东煎大学博：t学位论文StudyonAquaticPlantF：dterBedSystemforEutrophicatedWaterQualiqlmproVementSoNGHai一1iangSuperVisol‘：LUXi—wuD印a九mentofEnVlronmentalScIence＆Englneerlng．CollegeofClvlIEnglneenng．SoutheastUnlverslQ，．NarLl}ngChinaAbStraCtA

2、quaticplantnlterbed(APFB)isanewtypeoftecllnjquecombiningplantpuri打cationandphysical6ltrationf．orconstructedwetlandswithoutanysubstratethatappliedmain】ytopurincationofhype卜eutrophicsurfacewater．ApilotscaleAPFBestablishedatthe】akefrontofTajhuLakewastestedtotreatp01lutedriVerwater．Thef0110wingres

3、ultswereobtained：ZpD7”DP臼臼g“口f七口ando已”口”砌e，口Va"耙口areidenti6edasthemostsuitableedibleaquaticvegetablespeciestransplantedinAPFBduringsummer／autumnandwinter／springseparately．ThecharacteristicsofAPFBforni廿ogenandphosphomswerefullymallifested．Undertheoptimaloperationconditionswithhydraulic10adingra

4、te(HLR)of4．0m5／(m2·d)andwatersurf．acelevelof1Ocm，theremoVal10adingratesoftotalnitrogen(1N)、totalphosphoms(TP)are1．539g／(m2。d)a11d0．232∥(m2·d)respectiVelyforall—yearaVerage，theremoVale伍ciencyareaccordin91y17．3％a11d24．1％．Theremovale伍cienciesfor1Na11dTParebetterthandissolvedni仃ogena11ddissolvedph

5、osphoms．ThereIn0Valloadingrateofnitrogenandphospholllsarealsoinnuencedbythef}equencyofh￡Irvesting，andtheproperfrequencyofharvestingfor珍DmDP口口9“口，记口isonceamonth．TheAPFBcanoutputeconomicprofita砸mativelywhenoperationundertheHLRbetween3．0to4．0m3／(m2·d)．BythedynamicseValuationofnitri打cationanddenit

6、TjficationpotentialforsedimentaccumulatinginthebottomofAPFB，itisfoundthatthemaXimumnitrmcationa11ddenitrincationpotentialappearsinthemiddlepanand行ontpanofAPFBseparately．Thisdistributioncausesunfavorableen’ectonmicroorganismdenitri6cationpmcess．Itisfoundthatthedistributionofnitrificationpotenti

7、alaccordswiththe锄monium。oxidizingbacteriadensityusingfluorescencef，?si，甜hybridization(FISH)todetectingammonium—oxidizingbactenaandni仃ite—oxidizingbacteriadensityinsedimentThesumofnitrogenremoValloadingratebydenitrificationandplantuptake