摘要
以模拟城镇污水厂尾水作为试验用水,对比研究了采用自制的多孔轻质负荷陶粒滤料的生物滤池即新型轻质陶粒生物滤池与普通生物陶粒滤池在系统挂膜启动阶段的生物膜的形成情况及水处理效果,并通过高通量测序探究了该新型生物滤池挂膜启动阶段生物膜微生物群落结构的变化规律。试验结果表明:对比普通生物陶粒滤池(对照组),新型轻质陶粒生物滤池(试验组)能减轻约68.4%的滤层总重量;挂膜启动阶段两组COD_(Cr)和总氮的进水浓度均维持在75 mg/L和15～16 mg/L,试验组出水COD_(Cr)和总氮的平均去除率分别达76.5%和51%,均优于对照组5%左右,且试验组挂膜初期处理优势明显,挂膜启动第1 d时试验组尾水中COD_(Cr)、总氮的去除率分别为61.35%、35.1%,分别超出对照组22.96%、10.1%左右;试验组陶粒的附着生物量始终高于对照组陶粒约20%;微生物群落结构分析结果表明,多孔轻质负荷陶粒滤料生物膜群落结构以变形菌门和拟杆菌门为优势菌门,以黄杆菌纲、β-变形菌纲为优势菌群,挂膜约7 d后微生物群落组成开始趋于稳定,但仍存在缓慢变化,20～27 d生物种群相似度极高,以土壤杆菌属(Agrobacterium)、热单胞菌属(Thermomonas)、土地杆菌属(Pedobacter)、嗜氢菌属(Hydrogenophaga)等为主。文中结果可为城镇污水厂尾水处理出水水质的稳定达标及进一步的提标提供技术参考。
Taking simulated tail water of urban sewage treatment plant as test water,biofilm formation and water treatment of common bioceramic filter and new lightweight ceramic biofilter using lightweight porous composite ceramsite at the startup phase of the system were compared.The high-throughput sequencing were used to investigate the changes of biofilm microbial community structure during the startup phase of the biofilter.The test results showed that compared with common bioceramic filter(control group),new lightweight ceramsite biofilter(test group)could reduce total weight of the filter layer by about 68.4%;COD Cr and TN in the startup phase of the membrane.The influent concentration was maintained at 75 mg/L and 15~16 mg/L.The average removal rates of COD Cr and total nitrogen(TP)in the effluent of the experimental group were 76.5%and 51%,respectively,which were better than 5%of the control group,and the initial treatment advantages of the test group were obvious.On the first day of membrane initiation,removal rates of COD Cr and TN in the tail water of the test group were 61.35%and 35.1%,respectively,which were 22.96%and 10.1%;Attached biomass of the light filter material was always higher than the ordinary ceramsite by about 20%;According to the analysis of microbial community structure,biofilm community structure of light filter material was dominated by Proteobacteria and Bacteroidetes,and the dominant strains were Lactobacillus andβ-Proteobacteria.The composition of microbial community began to stabilize after about 7 days,but there was still a slow change,dominated by Agrobacterium,baconas,Pedobacter and Hydrogenophaga.It provided a reference for the stable compliance of the tail water treatment effluent quality of urban sewage treatment plants and further standardization work.
作者
操家顺
费罗兰
罗景阳
商凯航
姚博宇
姚永连
CAO Jiashun;FEI Luolan;LUO Jingyang;SHANG Kaihang;YAO Boyu;YAO Yonglian(Key Laboratory of Integrated Regulation and Resource Development Shallow Lakes,Ministry of Education,Hohai University,Nanjing 210098 ,China;College of Environmental Science and Engineering,Hohai University,Nanjing 210098,China;China Energy Construction Group Zhejiang Electric Power Design Institute Co.,Ltd.,Hangzhou 310012,China)
出处
《净水技术》
CAS
2019年第1期74-82,共9页
Water Purification Technology
关键词
新型轻质陶粒生物滤池
多孔轻质负荷陶粒
水处理效果
微生物群落
new lightweight ceramsite biofilter
lightweight porous composite ceramsit(LPCC)
water treatment effect
microbial community
