垂直潜流人工湿地中有机物去除动态规律研究叶建锋

1,2,1(1.,　200233;2.,　200092):,,.,,10cm,,;、≤0.5m3(m2·d),60cm;10cm,,;(cin-cout)×q=1107.02-2.96cin×q.:;;;;:X52　:A　:0250-3301(2008)08-2166-06:2007-08-09;:2007-10-24:(863)(2003AA601020);“”(2006BAC01A14):(1976～),,,,E-mail:[e-mail]tterRemovalinVertical-FlowConstructedWetlandYEJian-feng1,XUZu-xin2,LIHuai-zheng1(1.ShanghaiAcademyofEnvironmentalSciences,Shanghai200233,China;2.SchoolofEnvironmentalScienceandEngineering,TongjiUniversity,Shanghai200092,China)Abstract:Basedupontheanalysisoftheremovalrateandformchangeoftheorganicpollutantswiththedifferentheightofthevertical-flowconstructedwetland,itcomestotheconclusionoftheaveragelongitudinalremovalrateofvariantformsorganicsandpresentstheinfluentconcentrationandthehydraulicloadcurve.Theresultsindicatedthat:Underthisexperimentalcondition,thereductionoftheorganicsintheverticalsubsurfaceflowconstructedwetlandmainlyoccurredwithinthe0-10cmsubstratebelowthepipedistributor.Inthemeantime,thesmallerthehydraulicloadofinfluent,thehighertheremovalratiooftheorganicpollutantsinthesubstratesection.Undertheconditionthattheverticalsubsurfaceflowconstructedwetlandusedthecoarsesandsasthesubstrateandkepttheinfluenthydraulicloadlessthanorequalto0.5m3(m2·d),theeffectiveheightoftheorganicsremovalwas60cm.Italsoshowedthattheaveragedegradationrateofdifferentkindsoftheorganicpollutantshasamaximumvalueinthe0-10cmsubstratesectionbelowthepipeline.Moreover,thedegradationratioofdifferentkindsoftheorganicsisinsignificantdecreasingtendencywithincreasingthedepthofthelongitudinaldirectionalongthepipe.Usingsandsasthesubstrateintheverticalsubsurfaceflowconstructedwetland,therelationshipoftheinfluentconcentrationandinfluenthydraulicloadcanbeexpressedbyformula:(cin-cout)×q=1107.02-2.96cin×q.Keywords:constructedwetland;organicmatter;dynamicrule;removal;vertical-flow　　2070,、、[1,2],[3,4].,,,,,[5].,BODCOD85%～95%80%[6～16],,、.,,,、.1　1.1　2(A、B),1.5m×0.5m,1.4m,1.(120cm),10cm,2.529820088　　　　　　ENVIRONMENTALSCIENCEVol.29,No.8Aug.,2008DOI:10.13227/j.hjkx.2008.08.014cm,1～5,10、20、40、60、80cm(0cm).,4m2.,1.d10、d500.25mm0.60mm,(Cu)3.2,1.27×10-2cms.1　Table1　Sizedistributionofgrainintheexperimentsystemsmm%56.545～1.2522.201.25～0.6317.710.63～0.31535.830.315～0.1615.790.161.931　Fig.1　Schematicdiagramofvertical-flowconstructedwetlandsystems　1.2　,2.,A0.5m3(m2·d),66.5～136g(m2·d);B0.3m3(m2·d),39.9～81.6g(m2·d).2　Table2　Waterqualityofinfluentinthevertical-flowconstructedwetlandsystemspH7.0～7.97.3SSmg·L-164～192113CODmg·L-1133～310225TPmg·L-11.2～2.71.8NH+4-Nmg·L-113.0～39.725.01.3　1.3.1　“+”,:,1molL,60～80℃30min,.:,0.45μm,105℃30min,.,550℃15min,.1.3.2　(TCOD),(DOC)0.45μm,(POC)=(TCOD)-(DOC).2　2.1　[0.5m3(m2·d)0.3m3(m2·d)],TCOD、POCDOC2.2.1.1　2,POCDOC10cm.0.5m3(m2·d),10cm,TCOD、POCDOC59.05%、75.90%50.88%;10～110cm,35.58%、30.00%36.90%.0.3m3(m2·d),10cm,TCOD、POCDOC21678:2　Fig.2　Variationofthemorphologyandconcentrationoforganicmatteralongthevertical-flowconstructedwetlandsystems　70.07%、100%51.46%;10～110cm,TCODDOC30.26%49.39%.2:①,POCDOC　　　10cm,POC;②,,10cm.2.1.2　2TCOD、POCDOC,3.0.5m3(m2·d),TCOD10cm,10～60cm,60cm;DOCTCOD,60cm;POC20cm(86.75%,99%),20cm.3　Table3　Removalsituationmapofdifferentformsoforganicmatterinvertical-flowconstructedwetlandsystemscm0.5m3(m2·d)0.3m3(m2·d)TCODPOCDOCTCODPOCDOC0～1010～2020～4040～6060～11059%10%(4%)86%(3%)50%25%(4%)70%7%(1%)100%5%(4%)64%13%(1%)　　0.3m3(m2·d),TCOD10cm,10～40cm,40cm;DOC60cm;POC10cm,10～20cm,.2.1.3　3,0.5m3(m2·d),TCOD、POCDOC60、2060cm;0.3m3(m2·d),TCOD、POCDOC40、2060cm.,、≤0.5m3(m2·d),60cm.2.2　2.2.1　DOC3　Fig.3　Averagedegradationrateofdissolvedorganicmatteralongtheverticaldistance　(4),,3.2168　　　　　　294　、mg·mL-1Table4　Organicmatterremovalefficiencyalongthedistanceandtheaverageconcentrationofbio-filmandvolatilebio-filmineachlayermg·mL-1cmcm0.5m3(m2·d)0.3m3(m2·d)DOCDOC0～1010870.010100.00140880.012250.0025510～201000.011200.00235210.008800.0009520～4020170.009250.0022520.007800.0008540～602090.007000.00065210.007250.0014060～802060.00605020.005500.0009080～1103010.00485000.004450　　3,10cm,,310.71kg(kg·d)[0.5m3(m2·d)]172.55kg(kg·d)[0.3m3(m2·d)];,,0～69.23kg(kg·d)[0.5m3(m2·d)]11.11～110.53kg(kg·d)[0.3m3(m2·d)],40～60cm,10cm,5.2.2.2　TCODPOC2:,;.4.4　、Fig.4　Averageremovalrateoftotalorganicmatterandparticulateorganicmatteralongtheverticaldistance　4,10cm,,5.63kg(m·d)2.36kg(m·d)[0.5m3(m2·d)]、6.68kg(m·d)3.38kg(m·d)[0.3m3(m2·d)],,、.10cm,,1.05kg(m·d)[0.3m3(m2·d),20～40cm],0.98kg(m·d).2.3　(60cm),(5).5　Table5　Averageremovalrateoftotalorganicmatteranditsfittingcurvealongthedistancecm127g·(m2·d)-176g·(m2·d)-1(x、y)0～105.636.68y=8.24-0.021x10～200.26-0.34y=-1.23+0.012x20～400.411.05y=2.00-0.016x40～600.300.19y=0.026+0.0022x　　,:(cin-cout)×q=∑4i=1vihi×103(1),cin,mgL;cout,mgL;q,m3(m2·d);vii,kg(m·d);hii,m.5,(1):(cin-cout)×q=1107.02-2.96cin×q(2)　　《》(GB21698:18918-2002),,、60cm5.5　Fig.5　Variationcurveofconcentrationandhydraulicloadofinfluentinvertical-flowconstructedwetlandsystems　3　(1),10cm,POC;,10cm.(2)、≤0.5m3(m2·d),60cm.(3)DOC10cm,0.5m3(m2·d)0.3m3(m2·d)310.71kg(kg·d)172.55kg(kg·d);POC10cm,22.36kg(m·d)3.38kg(m·d).(4),:(cin-cout)×q=1107.02-2.