电化学水处理新技术问世_钱伯章

SLUDGECHARACTERISTICSINASUBMERGEDDOUBLE-SHAFTROTARYANAEROBICMEMBRANEBIOREACTORBaiLing1,LiuChao2,HuKan1,WangShenxiang1（1.CollegeofNaturalScience，JiangxiAgriculturalUniversity，Nanchang330045,China；2.CollegeofComputerScienceandTechnology,JiangxiNomalUniversity，Nanchang330027,China）Abstract:Thesludgecharacteristicswasstudiedtreatmentforsyntheticbrewerywastewaterbysubmergeddouble-shaftrotaryanaerobicmembranebioreactor（SDRAnMBR）.Theresultsshowedthatsludgehadhighactivity,rotaryshearstresscannotdisruptanaerobicbio-solids,andhadwellsludgeflocs.Thesecharacteristicscoulddecreasetheeffectonsludgeactivityandparticlesizecomefromtheshearstressexcessbigness，restrainspeedinessaccumulationofextracellularpolymericsubstances(EPS)insludgemixedliquorduetoMLSSaccretion，aswellasrestrainspeedinessaccretionofsludgedynamicviscositytoo.Therebymembranefoulingwasreducedconsumedly.ItwasrealizedsteadyrunningwhenoperatedatbiggishMLSS（be-tween18to19.5g·L-1）,higherEPS（between50.9to63.9mg·gMLSS-1）,smallsludgeparticlesize（between4.00to36.54μm）andlargersludgevis-cosity（between6.6to7.5mPa·s-1）.ThefingingwasidentifiedthatthewellactivitysludgeinSDRAnMBRandstrengthenedanti-contaminationperfor-manceofmembranemodulecanbeexplainedbycharacteristicsofhydraulicsdynamicsofthree-staterotatingflowandsynergeticeffectwithanaerobicgranulessludge.Keywords：submergeddouble-shaftrotaryanaerobicmembranebioreactor;brewerywastewater;sludgecharacteristics3结论SDRAnMBR的污泥特性是污泥活性高，旋转剪切力没有对厌氧颗粒污泥的性质造成破坏，具有性能良好的絮体。能有效减轻污泥浓度、EPS、污泥粘度、污泥颗粒粒径的变化对膜污染的影响。污泥浓度、EPS、污泥粘度均随运行时间的增加、COD容积负荷的提高逐渐增大，但增大的程度不大；污泥颗粒粒径随膜旋转速度的提高逐渐下降，但下降的幅度不大。在试验的操作条件下，膜过滤阻力保持不变。并能在较高质量浓度的MLSS（19g·L-1左右）、较高的EPS浓度（50.9～63.9mg·gMLSS-1）、较小的污泥颗粒粒径（4.00～36.54μm）和较大的污泥粘度（6.6～7.5mPa·s-1）时稳定运行。因此，由膜旋转形成的三相旋转流和厌氧颗粒污泥的协同作用，使SDRAnMBR具有性能良好的活性污泥，同时强化了膜组件的抗污染性能。参考文献：[1]WilliamP,BarberandDavidC,Stuckey.Theuseoftheanaerobicbaffledreactorforwastewatertreatment:areview[J].WatRes.,1999,33(7):1559-1578.[2]ElmalehS,AbdelmoumniI.Experimentaltesttoevaluateper-formanceofananaerobicreactorpr