大理石加工废水

242Vol.24No.220114JOURNALOFPETROCHEMICALUNIVERSITIESApr.2011:1006-396X(2011)02-0062-04金珊,孙杰(,113001):采用孔径为0.8m的陶瓷膜处理大理石生产过程中产生的废水,研究了操作压差和膜面流速等对膜性能的影响结果表明,合适的操作条件是操作压差0.07MPa,膜面流速1.0m/s,滤出液中固体颗粒的截留率在99.2%~99.8%,膜微滤过程对废水的pH值和COD值的影响不大运行中膜通量稳定平均值为400L/(m2h),料液的固体质量浓度大于55g/L时,膜通量明显下降对污染膜用清水清洗20min和体积分数为1%的HNO3溶液清洗30min,膜通量可以得到完全恢复渗透液返回生产工序循环使用,截留液进入沉降池:陶瓷膜;微滤;大理石;废水:TQ174.9:Adoi:10.3696/j.issn.1006-396X.2011.02.016TreatmentofMarbleProcessingWastewatersbyCeramicMicro-FiltrationMembraneJINShan,SUNJie(SchoolofChemistryandMaterialsScience,LiaoningShihuaUniversity,FushunLiaoning113001,P.R.China)Received27December2010;revised28February2011;accepted7March2011Abstract:Treatmentofmarbleprocessingwastewatersbyceramicmicro-filtrationmembranewithporesizeof0.8mwasperformed.TheeffectsofthetransmembranepressureandcrossflowvelocityontheMFperformancewereinvestigated.Theexperimentalresultsshowthatthefeasibletransmembranepressureis0.07MPaandcrossflowvelocity1.0m/s.Thesolidrejectionsofthepermeatesampleswerefrom99.2%to99.8%.TheMFprocesshasnoremarkableeffectonthewastewaterpHandCOD,themembranefluxremainedconstantthroughouttheexperiment,theaveragevalueis400L/(m2h).Thefluxwasremarkabledeclinewhenthesolidconcentrationoffeedliquidisover55g/L.Themembranefluxcanberecoveredcompletelyaftercleanedbythewaterwith20minutesandnitricacidsolution(volumefraction1%)with30minutes.TheMFprocessallowedthetreatedwatertoberecycledintotheprocess,whereastheconcentratedstream(richinparticulatematter)turnedintosedimentationpool.Keywords:Ceramicmembrane;Micro-filtration;Marble;WastewaterCorrespondingauthor.Tel.:[phone];e-mail:[e-mail],,60%,,,,[1]:2010-12-27:金珊(1957-),女,辽宁抚顺市,教授,博士,[2],,,,,,,[3-5],,,1实验部分1.11,,,,K3K15,,Fig.1Schematicdiagramoftheexperimentalapparatus10.8m19Al2O3,24cm,4mm,0.0573m21.2pHpH,,(Mastersizer2000),CODGB/T11914-19891.3,,6g/L,pH9,COD38mg/L,1m10%,3m60%,5m90%,2.5m2结果与讨论2.1,,2.5m,1m10%,,0.8m6g/L,,43,0.07MPa,1.0m/s,10min2Fig.2Variationofpermeatefluxwithtime22,0.8m,456L/(m2h)421L/(m2h),,,,0.8m2.2,,,,2g/L1.0m/s0.07MPa,,3Fig.3Variationofpermeatefluxwithtemperature33,,2.340,0.07MPa,1.0m/s,2,4,6,8,10g/L,:R=1-100%,632.pHCOD,11Table1Effectofmembraneprocesstreatwithmarblewastewaters水样pHCOD/(mgL-1)固体/(gL-1)原料液8.4~9.510~502~10渗透液8.9350.0161,pHCOD,,99.2%~99.8%2.440,6g/L,1.0m/s,,,4Fig.4Variationofpermeatefluxwithtimeunderdifferenttransmembranepressure44,,0.07MPa,,0.10MPa,0.15MPa,0.07,0.10,0.15MPa,428,543,732L/(m2h),,,[6],,2.5,,,40,6g/L,,,5Fig.5Variationofpermeatefluxwithtransmembranepressureunderdifferentcross-flowvelocity55,(1.0m/s),,(0.5m/s),(0.06MPa),,,,,,[7],,,,,,,[8],1.0m/s0.07MPa,,2.6,,,0.07MPa,40,1.0m/s,,66424Fig.6Effectoffeedconcentrationonthepermeateflux66,0~55g/L,,;55g/L,,6g/L,92.7,,,,,,(6m/s)(0.05MPa)20min,1%HNO330min,40,0.07MPa,1.0m/s,CaCO3,10min,5,22,2Table2Membranescleaningbeforeandafterflux实验次数纯水通量/(Lm-2h-1)污染膜通量/(Lm-2h-1)清洗后膜通量/(Lm-2h-1)膜通量恢复率,%142626542599.82416258418100.5343124942799.1442425342299.5[1]李小梅,吴春山,庄一庭,等.石板材加工行业的水环境污染特征研究[J].福建师范大学学报:自然科学版,2006,22(4):67-79.[2]徐微,吕锡武,朱光灿,等.三级混凝/沉淀工艺处理大理石加工废水[J].中国给水排水,2007,23(6):53-54.[3]芦艳,于水利,孙鸿,等.超滤膜处理油田采出水及污染膜的微观分析[J].化工环保,2009,29(2):139-143.[4]支天一,王磊,张岩,等.纳滤膜深度处理饮用水的中试研究[J].辽宁石油化工大学学报,2009,29(2):24-27.[5]衣海英,王树涛,趁淑清.陶瓷微滤膜深度处理炼油污水二级出水的效能及膜清洗研究[J].环境科学与管理,2006,31(3):102-105.[6]Ould-DrisA,JaffrinMY,Si-HassenD,etal.Analysisofcakebuild-upandremovalincross-flowmicrofiltrationofCaCO3,suspensionsundervaryingconditions[J].J.membr.sci.,2000,175(2):267-283.[7]赵宜江,邢卫红,徐南平.陶瓷微滤膜澄清钛白废酸研究[J].化学工程,2003,31(5):58-61.[8]金珊.颗粒体系错流微滤过程临界点研究[J].石油化工高等学校学报,2006,19(3):27-30.(Ed.:SGL,Z)652.