PVA退浆废水预处理研究盛季陶

PVA盛季陶(,,200051)　PVA(聚乙烯醇)是一种高分子合成浆料,它广泛用于纺织、染整行业中,由于其可生化降解性差,会影响到废水处理,为此研究了化学絮凝、微滤和超滤对废水中高浓度PVA的预处理技术,并评价了三种预处理工艺的效果。:PVA浆,絮凝剂,微滤,超滤:X131.2　　PVA/,。PVA,PVA,PVA,PVA,CODCr3000mg/L,BOD5/CODCr0.20,。PVA,,,,,。PVABOD5/CODCr0.200.30,[1]。PVAPVA,,。1　化学混凝法试验1.1　PVA::PAC(),2(),,;:PVM(),P26,P30。1.2　。1.3　、COD、。1.4　pH,pH6.5～7.5;,,,;30min。1.5　,PAC2,,,,CODCr40%,CODCr60%。1.6　CODCrCODCr(%)=[CODCr]-[CODCr][CODCr]×100%[CODCr]:[CODCr];[CODCr]:[CODCr]。PAC2PVACODCr12。:2001061128120022()JOURNALOFDONGHUAUNIVERSITYVol.28,No.1Feb.20021　PACPVACODCr　　1P301.0mg/LPAC;(a)CODCr;(b)CODCr;(c)CODCr。2　2PVACODCr　　2P301.0mg/L2;(a)CODCr;(b)CODCr;(c)CODCr。12,CODCr,2,PAC,PAC750mg/L,、PAC500mg/L;22000mg/L。1.7　PVA,,,Mn+[—OH※M]n+;,,,,,,,,,,[2]。2　微滤试验2.1　,,。,PVA,,;。,500、106;[3]。2.2　,、、,,10-1～10μm,。(1),0.3～0.7MPa。(2)PVA,[CODCr]7500mg/L,,[CODCr]4575mg/L,CODCr39%。3　超　滤10-3～10-1μm,102　　()28,Hagen-Poiseuille:Jv=(ξr2/8ητl)Δp:Jv;ξ;r;η;τ;Δp、;l。3.1　(NEWLOGIC)VSEP,,pH7.4,60℃,0.7MPa。3.2　80kg([CODCr]7033mg/L)。3.3　“”(3),,2～4h,,,8～10h[COD]。1。1AF5,CODCr90%。3　1　/mL·min-1/mL·min-1/MPa[CODCr]/mg·L-1CODCr(%)AF5190.1187.20.7706.090DS5108.2106.80.7323.495NTR741092.823.610.7451.093NF45100/0.7180.497　　AF5:;DS5:;NTR,NF:4　预处理方法比较与结论2,,,,,,,PVA。2　3　　/21000010000002500000/·m-30.353.7418.80CODCr(%)39.540～5090　　　　,,,,,,,,1:PVA103　　　　　1　,,..:,2001.10～112　,,,..:,1983.38～393　..:,1998.211～215ResearchonthePretreatmentofPVA-sizeWasteWaterShengJitao(CollegeofChemistryandChemicalEngineering,DongHuaUniversity,Shanghai,200051)Abstract　PVAisakindofmacromoleculesize,whichiswidelyusedintextileindustry.Butitispoorbiochemicaldecompo-sitionandaffectestheefficiencyofthetreatmentofwastewater.Inthispaper,threekindsofpretreatmenttechnologyinhighconcentrationPVAwastewater,chemicalcoagula,microfiltrationandultrafiltrationwerestudied,andcomparisonofthethreemethodswasmade.Keywords:PVAsize,coagulater,microfiltration,ultrafiltration(上接100页)PropertiesofComplexModifyingStarchasPrintingPasteMinJie(CollegeofChemistryandChemicalEngineering,DongHuaUniversity,Shanghai,200051)Abstract　Inthispaper,therheologicalpropertyofcomplexmodifyingstarchisstudied.Theexperimentsshowthatsodiumalginatecanbeallorpartlyreplacedbythecomplexmodifyingstarchinthereactivedyeprinting.Keywords:starch,modification,printing,paste,rheological104　　()28