MBR于德爽, 李 津, 陆 婕(青岛大学化学化工与环境学院,山东青岛266071) : 采用MBR工艺处理含不同比例海水的污水,在进水COD为800~1000mg/L、NH3-N为80~100mg/L、pH值为7.0~8.5以及污泥浓度为7000mg/L、溶解氧为2~4mg/L、温度为20~25℃的条件下,当海水所占比例为30%、50%和70%时,对COD的去除率分别为93%、87%和75%;当海水所占比例为40%、60%和70%时,对氨氮的去除率分别为95%、91%和85%。随着盐度的升高则活性污泥的沉降性能变好,污泥颗粒由开放、疏松变得封闭、紧密。高盐度环境下微生物所分泌的大量胞外聚合物是造成膜污染的主要原因。 :(50678085) : 膜生物反应器; 含盐污水; 污泥体积指数; 膜污染; 胞外聚合物:X703.1 :A :1000-4602(2008)03-0005-04ExperimentalStudyonTreatmentofWastewaterContainingSaltbyMBRProcessYUDe-shuang, LIJin, LUJie(SchoolofChemicalandEnvironmentalEngineering,QingdaoUniversity,Qingdao266071,China) Abstract: MBRprocesswasusedtotreatwastewatercontainingdifferentcontentofseawaterundertheconditionsofCODof800to1000mg/L,NH3-Nof80to100mg/L,pHof7.0to8.5,MLSSof7000mg/L,DOof2to4mg/Landtemperatureof20to25℃.TheresultsshowthatCODremovalrateis93%,87%and75%respectivelywhentheseawatercontentis30%,50%and70%.NH3-Nre-movalrateis95%,91%and85%respectivelywhentheseawatercontentis40%,60%and70%.Fur-thermore,thesettleabilityofsludgeimproveswiththeincreaseofseawatercontent,andthesludgegran-ulesbecomecompact.Theextracellularpolymericsubstance(EPS)excretedbymicroorganismsunderhighsaltenvironmentismainlyresponsibleformembranefouling. Keywords: MBR; wastewatercontainingsalt; SVI; membranefouling; EPS ,,(),[1]。,A2/O、SBR、、、、,(MBR)。MBR,、、、[2]。MBR,COD、·5·第24卷 第3期2008年2月 中国给水排水CHINAWATERWASTEWATER Vol.24No.3Feb.2008,MBR。1 试验材料与方法1.1 1。1 MBRFig.1 SchematicdiagramofMBR 97cm×50cm×70cm,257L,8KMS。30cm×20cm,0.4μm,2.57m2。,,,,,,。,7min、3min。(MLSS)7000mg/L,DO2~4mg/L,20~25℃,(HRT)12h。1.2 (),、,COD800~1000mg/L,NH3-N80~100mg/L,pH7.0~8.5。,Cl-1。1 Cl-Tab.1 SalinityandCl-concentrationinwastewaterwithdifferentseawatercontents /%10203040506070/(g·L-1)3.5710.51417.52124.5Cl-/(g·L-1)1.93.85.77.69.511.413.31.3 COD,COD。,NaClMLSS,100mL,。[3]。1.4 ,,。,COD、NH3-N,,。2 结果与讨论2.1 ,:①,;②;③。MBR,,,2。2 CODFig.2 CODremovalinwastewaterwithdifferentseawatercontents 2,30%,,93%,(80%)[4]。,COD,,50%,87%,A/O()[5]。,·6·第24卷 第3期 中国给水排水 。,MBR,,:MBR、,;、、,。2.2 MBR,3。3 Fig.3 Ammonianitrogenremovalinwastewaterwithdifferentseawatercontents 40%,,95%;,,,60%,91%,,,70%,85%,A/O()[5]。,。,。,COD。,,,5%,。MBR,。,,(,),。MBR,,。2.3 ,SVI4。4 SVIFig.4 SVIinwastewaterwithdifferentseawatercontents ,SVI。,,。,,,。,,5。5 Fig.5 Sludgestructureinwastewaterwithdifferentseawatercontents 5,10%,,,;40%,;·7·于德爽,等:MBR工艺处理含盐污水的试验研究第24卷 第3期70%,。,,,,。()、、。,,。Na+,。,,,,,SVI。,,,Na+,SVI。2.4 ,MBR()()[6~9]。,,。,。(TMP),105TMP15.7kPa,。,pH=11~128h,8h。,TMP3.5kPa。,,,;,。,MBR,。3 结论① MBR,30%,,93%;50%,,87%;,,70%,COD75%。② COD。40%,,95%;60%,91%;70%,85%。③ ,,、、。④ 。,15.7kPa3.5kPa。:[1] ,,,.[J].,2005,25(10):1-5.[2] ,.[M].:,2006.[3] .(4)[M].:,2002.[4] ,,,.[J].,1999,15(9):4-6.[5] ,,.A/O[J].,2005,31(9):34-37.[6] ,,.MBR[J].,2006,32(10):80-83.[7] ,,.MBR[J].,2006,22(5):106-108.[8] ,,.MBR[J].,2005,21(2):50-52.[9] ,,,.[J].,2001,34(6):63-66.:(1964- ), , , , , 。E-mail:hgdyds@263.net:2007-10-16·8·第24卷 第3期 中国给水排水