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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