浮床植物净化生活污水中NP的效果及N2O的排放张志勇

2710200710ACTAECOLOGICASINICAVo.l27,No.10Oc.t,2007“”(2002AA601012):2006-08-25;:2007-05-29:(1977～),,,,.E-mail:[e-mail]*CorrespondingAuthor.E-mail:[e-mail]:TheprojectwasfinanciallysupportedbyNationalImportantTechnologyofChina(No.2002AA601012)Receiveddate:2006-08-25;Accepteddate:2007-05-29Biography:ZHANGZhi-Yong,Ph.D.candidate,mainlyengagedintreatmenttechnologyofnone-pointsourcespollution.E-mail:[e-mail]、PN2O张志勇,冯明雷,杨林章*(,　210008):,(Loliummutliflorum)、(Oenanthejavanica)(VetiveriaZizanioides)3N、PN2O。,TN、NH+4-NTP。,、TN26.2%,22.9%,4.1%;NH+4-N31.4%,14.5%,3.0%;TP33.1%,54.2%,15.5%。,TN、NH+4-NTP,NO-3-N;N2O,、、N2O174.44μg/(m2h),82.19μg/(m2h),112.49μg/(m2h)44.81μg/(m2h)。N2O,,N2O。:;;;;;N2O:1000-0933(2007)10-4333-09　:Q142,X171,X703　:ANitrogenandphosphorusremovalandN2Oemissionfromdomesticsewageinfloating-bedplantsystemsZHANGZhi-Yong,FENGMing-Lei,YANGLin-Zhang*InstituteofSoilScience,ChineseAcademyofSciences,NanJing210008,ChinaActaEcologicaSinica,2007,27(10):4333～4341.Abstract:Removalefficiencyofnitrogen,phosphorusandN2Oemissionfromdomesticsewageinfloating-bedsystemwithLoliummutliflorum,OenanthejavanicaandVetiveriaZizanioideswereinvestigatedingreenhouse.Resultsshowedthatallthreeplantshadgoodremovalefficienciesoftotalnitrogen(TN),ammonia-nitrogen(NH+4-N)andtotalphosphorus(TP)fromdomesticsewageinthefloating-bedsystem.Incomparisonwiththenone-plantsystem,thethreeplantsincreasedaveragelytheTNremovalrateby26.2%,22.9%and4.1%,theNH+4-Nremovalrateby31.4%,14.5%and3.0%,andtheTPremovalrateby33.1%,54.2%and15.5%,respectively.Withretentiontimeprolonged,theconcentrationsofTN,NH+4-NandTPofdomesticsewagewereobviouslyreducedinallfloating-bedsystems,howevertheNO-3-Nconcentrationsweregraduallyaccumulatedduetothestrongernitrificationthandenitrification.Theplantsinfloating-bedsystemincreasedsignificantlytheN2Oflux,whichwas174.44μg/(m2h),82.19μg/(m2h),112.49μg/(m2h)and44.81μg/(m2h),respectively,fortheLoliummutliflorum,Oenanthejavanica,VetiveriaZizanioidesandnone-plant:floating-bedplantsystems;domesticsewage;removalrate;nitrification;denitrification;N2Oflux,[1～4]。2080,[5～8],。,、、、、[4,6～12],,、、[7,9,11～14]。,。N2O[15,16],。N2O[17～19]、[20]、、[21,22][23]。N2O,,N2O,2.1Tg/aN2O[22]。N,,N-N2O,,N2O。,、,、N2O,N2O。1　1.1　、3。,。、8～10cm(15cm)。1.2　,pH。1。　　1　、(mg/L)　　Table1　ConcentrationsofnitrogenandphosphorusintesteddomesticsewageTNNH+4-NNO-3-NTP26.0±2.923.1±3.61.8±0.71.6±0.41.3　,200651()(624),55d。,17.0～33.0℃,26.9℃。(48cm×38cm×3cm),12cm×15cm9。(56cm×46cm×35cm)。3,,3。。6d,,8。35L,45L,20cm。,1、3、5、6d,TN、NH+4-N、NO-3-NTP。。3、,,513624334　　　　　　　27　。N2O(25cm×25cm×100cm),。1,,30min1,0、30、60min3,、、,8:00～10:00。N2O,4h1。N2O2,N2ON2O。1.4　:TN、NH+4-N、NO-3-N、TP。TNK2S2O8;NH+4-N;NO-3-N;TPK2S2O8。N2ONi63(HP5890Ⅱ)。:(%)=(C0V0-C1V1)÷(C0V0)×100%,C0;V0;C16;V16。N2O[24]:F=ρ×H×△c/△t×273/(T+273)FN2O;ρN2O,1.25kg/m3;H;△c/△tN2O;T。2　2.1　、,。,3216.7～367.0g/m2(2),,。,6,(525.8℃,628.4℃),,,。2　Table2　Growingstatusofplantsinfloating-bedsystemPlantsAbovegroundbiomass(DW,g/m2)Undergroundbiomass(DW,g/m2)Totalbiomass(DW,g/m2)Growthrates(cm/6d)5May6JuneLoliummutliflorum367.0±26.7*99.4±8.7466.4±27.8*16.6±6.99.1±3.5Oenanthejavanica358.2±18.514.1±1.0372.3±17.66.7±1.24.3±1.0VetiveriaZizanioides216.7±15.943.8±2.40260.5±8.46.2±2.19.9±2.7　　*51363Thevaluesincludeabovegroundbiomass(dryweight)harvestedonMay13thandJune3rd2.2　、2.2.1　TN、NH+4-N、NO-3-NTN、NH+4-N,TNNH+4-N,(1,8)。NH+4-NTN,3。TNNH+4-N,,、。,NO-3-N,,4335　10　　　　:N、PN2O　　TN、NH+4-N、NO-3-N　　Fig.1　DynamicchangesofTN、NH+4-N、NO-3-Nconcentrationsinfloating-bedplantsystems2　TP　Fig.2　DynamicchangesofTPconcentrationinfloating-bedplantsystems　NH+4-N,NH+4-NNO-3-N,NO-3-N。NO-3-N,,,NH+4-NNO-3-N。NO-3-N,NH+4-N。2.2.2　TPTP,TP3,TP,(2,TP8)。,,TP,TP(1.6mg/L±0.4mg/L)TN(26.0mg/L±2.9mg/L)、NH+4-N(23.1mg/L±3.6mg/L),TP。2.3　、2.3.1　TN、NH+4-N、NO-3-NTN、NH+4-N(3),TN、NH+4-N,TN、NH+4-N。3TN、NH+4-N:。、TN、NH+4-N:54.2%,76.4%;50.9%,59.5%;32.1%,48.0%,26.2%,31.4%;22.9%,14.5%;4.1%,3.0%。TN、NH+4-N,TN、NH+4-N。(51363),,TN、NH+4-N。4336　　　　　　　27　　TNNH+4-NFig.3　RemovalratesofTNandNH+4-Nfromdomesticsewagebyfloating-bedplantsystemsTN、NH+4-N,,(2),NH+4-N[10];,TN、NH+4-N(45.0%),。4　NO-3-N　Fig.4　RemovalratesofNO-3-Nfromdomesticsewagebyfloating-bedplantsystemsNO-3-NTNNH+4-N(4)。NO-3-N,NO-3-N,-384.87%。NO-3-NNO-3-N。2.3.2　TP、TP56.0%,77.1%38.4%(5)。,TP。TP22.9%,。TP,TPTNNH+4-N。2.4　N2ON2O(6),N2O。N2O174.44μg/(m2h)()、112.49μg/(m2h)()82.19μg/(m2h)(),44.81μg/(m2h)(),N2O,Wu[25]Tsuruta[26]N2O。N2O[23,27～30],N2O,NH+4-NNO-3-N,N2O。2.5　N2ON2O(7),N2O,。N2O,4337　10　　　　:N、PN2O　。[17～18]。,N2O,N2O。N2O,。7　N2O　Fig.7　DailychangesofN2Ofluxfromdomesticsewageinfloating-bedplantsystems3　,[2,3]。,。5、625.8℃28.4℃(,),(2),N、P。TN、NH+4-NTP。TN、NH+4-NTP,26.0,23.1mg/L1.6mg/L13.7～19.2mg/L,6.9～12.8