跌水曝气高度流量与复氧量关系研究李杰

:2007-12-16:(1984-),,,。、StudyonRelationshipamongWaterfallAerationHeight,FluxandReoxygenationContent李　杰1　钟成华2　邓春光3(1.西南大学化学化工学院　重庆　400715);(2.重庆工商大学　重庆　400067);(3.重庆市环境科学研究院　重庆　400020)　人工湿地床体内部缺氧是限制其去污效果的关键因素,而跌水曝气是改善人工湿地床体内溶解氧状况的有效措施之一。跌水曝气复氧效果和跌水高度及跌水流量有关。通过增大跌水高度增加曝气时间,从而使复氧量增加。但复氧量的增加趋势随跌水高度的增加而逐渐平缓,在2.5m左右能达到较好的跌水曝气效果。此外,设置更多更细的出水管道湿地出水变细流可以增加复氧面积,也有利于复氧。　　　Abstract　Theavailabilityofoxygeninthebedmatrixisoftenassumedtobethekeyfactorrestrictingtheremovalratesofpollutantsinconstructedwetland.Waterfallreoxygenationisoneeffectiveoperationsincreasingdissolvedoxygenlevelsofthewastewater.Thewaterfallheightandfluxinfluenceoxygentransferrate.Increasingreoxygenationtimebyraisingwa-terfallheightcanenhancereoxygenationefficiency.Butthetendencyofreoxygenationincreasinggraduallysmoothdownwhilewaterfallheightraising.2.5meterisasuitableheightforagoodreoxygenationefficiency.Increasingreoxygenationsurfaceareabysplittingstreamalsocanenhancereoxygenationefficiency.Keywords　WaterfallAeration　Height　Flux　　、、、、。--、,、、、、、、、-、、、,[1]。、、、、、。。,,,。。,,,、。1　,1。,16.8℃。MO128,C:C=Ct-C0Ct:(mg/L)C0:(mg/L)30mL/s,0.6、0.8、1.0、1.3、1.6、2.0、2.5、3.0m,。—39—、　　DOI:10.16803/j.cnki.issn.1004-6216.2008.05.0131　1.6m,5、10、15、20、25、30、40、50、60、80、100mL/s,。2　,,,[2]。。、。,,[3]。、。2。2　,。[4],2.8m,2.2m1.7m,6.59、5.605.27mg/L。,,,。,h,,h。,,:1nDDα=-K×tD:,9.84-CtDα:,9.84-2.35=7.49mg/Lt:(S)K:Ct:(mg/L)9.84:(mg/L)2.35:(mg/L),。t∝h1/2,th。h1/2,1n(9.84-Ct),1n(9.84-Ct)=-0.0272h1/2+2.0034(R2=0.9837)3。3　1n(9.84-Ct)h1/2,,,,,。,,,、。。,h2.5m,Ct5.07mg/L,h60%,4.0m,Ct6%,5.38mg/L。,2.5m。—40—　34　5　2008104。4　V,。。2r,r,。,,,,。,。K。。V1/2,1n(9.84-Ct),1n(9.84-Ct)=0.0657V1/2+1.2295(R2=0.9811)5。5　1n(9.84-Ct)V1/2　　,“”,,、。3　(1),。,、。,,、、,,。(2)。。,,,。(3),。:1n(9.84-Ct)=-0.0272h1/2+2.00341n(9.84-Ct)=0.0657V1/2+1.2295。　　　1..[J].,1996,8(3):268-272.2.,,.[J].,2002(2):180-181.3.,.:、、[M].:,2004.4..[D].,,2006.(上接第35页)(3),。　　　1.,,,..,1996(4):255-257.2.FontR,FullanaA,ConesaJA,etal.[J].JournalofAnalyti-calandAppliedPyrolysis,2001(1):927-941.3.XiaogeChen,JeyaseelanS,GrahamN.[J].WasteManagement,2002,22(7):755-760.4.CampbellEnvironmentalPtyLtd,Upgradingandevaluationofsludgederivedoilasadieselfuel.ChemistryCentre,1990.5.AustralianWaterandWaste-WaterAssociation.NineteenthFederalConference,Canberra;1989.6.,,,.[J].,2004,24(2):36-387.Khanbilvardi.ByR.,Afshari.S.Sludgeshaasfineaggreageforconcretemisture.JournalofEnvironmentalEngineering,1995,121(9):633-638.8.,.[M].:,2002.—41—、