Fe3O4+NPs类芬顿预处理对活性污泥法处理阿莫西林废水的影响

CIESCJournal,2018,69(12):5237-5245·5237·化工学报2018年第69卷第12期|www.hgxb.com.cnDOI：10.11949/j.issn.0438-1157.20180624Fe3O4NPs类芬顿预处理对活性污泥法处理阿莫西林废水的影响宿程远1,2，郑鹏1，廖黎明1，邓秋金1，陈孟林1，黄智1（1广西师范大学岩溶生态与环境变化研究广西高校重点实验室，广西桂林541004；2广西师范大学环境与资源学院，广西桂林541004）摘要：以阿莫西林为研究对象，探讨了其经不同程度磁性纳米铁（Fe3O4NPs）多相类芬顿预处理后对活性污泥理化特性及其微生物群落结构的影响。结果表明，随着预处理程度（未经预处理、经40%H2O2预处理和经60%H2O2预处理）的升高，活性污泥对废水COD平均去除率由81.5%升高到89.1%，氨氮平均去除率由86.2%升高到95.6%，同时活性污泥中蛋白酶的含量由0.13mg·g−1升高到0.19mg·g−1。且随着阿莫西林预处理程度的升高，活性污泥溶性微生物产物（SMP）的三维荧光光谱（EEM）中可见光区类腐殖酸与类富里酸的吸收峰强度逐渐减小，表明活性污泥活性良好。对于微生物群落分布而言，在未经预处理、经40%H2O2、经60%H2O2预处理的条件下，变形菌门所占比例分别为73..81%、84.08%和77.08%，同时厚壁菌门所占比例为0.6%、0.82%与0.78%。变形菌门为优势菌种，诸多固氮细菌与聚磷菌属于变形菌门；而厚壁菌门可利用水解酶来分解蛋白质与糖类，两者所占比例的升高，为废水中污染物的高效去除提供了保障。关键词：阿莫西林；类芬顿预处理；活性；需氧；氧化中图分类号：X703.1文献标志码：A文章编号：0438—1157（2018）12—5237—09InfluenceofFe3O4NPsheterogeneousFenton-likepre-treatmentonactivatedsludgetechnologyfortreatmentamoxicillinwastewaterSUChengyuan1,2,ZHENGPeng1,LIAOLiming1,DENGQiujin1,CHENMenglin1,HUANGZhi1(1UniversityKeyLaboratoryofKarstEcologyandEnvironmentalChangeofGuangxi,GuangxiNormalUniversity,Guilin541004,Guangxi,China;2SchoolofEnvironmentandResources,GuangxiNormalUniversity,Guilin541004,Guangxi,China)Abstract:AmoxicillinwasusedastheresearchobjecttoinvestigatetheeffectsofheterogeneousFenton-likepre-treatmentonthephysicochemicalpropertiesandmicrobialcommunitystructureofactivatedsludgeafterdifferentdegreesofmagneticnano-iron(Fe3O4NPs).Theresultsshowedthatwithincreasingthepre-treatmentdegrees(withoutpre-treatment,with40%H2O2and60%H2O2),theaverageCODremovalrateincreasedfrom81.5%to89.1%,andtheaverageammonianitrogenremovalrateincreasedfrom86.2%to95.6%bytheactivatedsludge.Meanwhile,theproteasecontentincreasedfrom0.13mg·g−1to0.19mg·g−1intheactivatedsludge.Withtheincreaseofpre-treatmentdegrees,three-dimensionalexcitationemissionmatrix(EEM)spectrademonstratedthattheabsorptionpeaksofthefulvicacidsandhumicacidsinthevisibleregionweregraduallydecreasedinthesolublemicrobialproducts(SMP)oftheactivatedsludge.Itwasshowedthattheactiv