溶解氧对高负荷生物絮凝-膜反应器的影响  

Effects of Dissolved Oxygen on High-Load Biological Flocculation-Membrane Reactor

作　　者：万立国[1,2] 熊玲 林巧 张丽君[1] 张文华[1,2] 刘红波[1,2] WAN Liguo;XIONG Ling;LIN Qiao;ZHANG Lijun;ZHANG Wenhua;LIU Hongbo(School of Water Conservancy&Environment Engineering,Changchun Institute of Technology;Jilin Provincial Key Laboratory of Municipal Wastewater Treatment(Changchun Institute of Technology),Changchun 130012,China)

机构地区：[1]长春工程学院水利与环境工程学院 [2]吉林省城市污水处理重点实验室(长春工程学院),吉林长春130012

出　　处：《水处理技术》2020年第9期123-127,共5页Technology of Water Treatment

基　　金：吉林省自然科学基金项目(20180101317JC);吉林省省级产业创新专项资金项目(2019C055);国家科技重大专项(2012ZX07202-009-01);吉林省重点科技攻关项目(20160204006SF);长春工程学院种子基金项目(320180027)。

摘　　要：为了优化高负荷生物絮凝-膜反应器的工艺参数,进行了不同DO含量对反应器膜污染和微生物群落的影响的平行对比实验,采用在线跨膜压差监测、死端过滤膜阻力分析和扫描电镜观察等手段考察膜污染状况,采用高通量测序检测细菌群落。结果表明,DO的质量浓度在6~8 mg/L时,反应器膜污染程度比DO的质量浓度为1~2 mg/L时更严重,该现象可能缘于过高的DO含量造成反应器内污泥絮体颗粒解絮凝,细小颗粒增多;DO的质量浓度在6~8 mg/L时,反应器内上清液和底泥中物种差异比DO的质量浓度为1~2 mg/L时更大,DO含量的变化引起反应器内底泥和上清液中物种的相对丰度变化,上清液中的浮游物种可能会造成更严重的膜污染,而存在底泥中的物种可能会有效缓解膜污染。In order to optimize the technological parameters of high load of bioflocculation-membrane reactor,the parallel contrast experiment was carried out to study the effect of different dissolved oxygen(DO)content on reactor membrane fouling and microbial community,using transmembrane pressure difference online monitoring,dead end filtration membrane resistance analysis and scanning electron microscope to investigate the membrane pollution,and high-throughput sequencing to test bacterial community.The results showed that when mass concentration of DO was 6~8 mg/L,the membrane fouling degree was more serious than that when mass concentration of DO was 1~2 mg/L,this phenomenon might be due to the excessively high DO content causing the deflocculation of the sludge floc particles in the reactor and the increase of fine particles.When mass concentration of DO was 6~8 mg/L,the difference of species in the supernate and the bottom sediment in the reactor was greater than that when mass concentration of DO was 1~2 mg/L.The change of DO content caused the change of relative abundance of species in the bottom sediment and the supernate in the reactor.Plankton species in the supernate might cause more serious membrane fouling,while species in the bottom sediment might effectively alleviate membrane fouling.

关 键 词：膜反应器 生物絮凝 溶解氧 膜污染 微生物群落 

分 类 号：TQ028.8[化学工程]