稳定段曝气时间对高负荷接触稳定法碳捕获影响及微生物群落结构分析  

Effect of aeration time in stabilization phase on carbon capture by high intensity contact stabilization method and analysis of microbial community structure

作　　者：孙剑平[1] 王奥乾 李绍峰 于明远 SUN Jianping;WANG Aoqian;LI Shaofeng;YU Mingyuan(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang Liaoning 110168;School of Materials and Environmental Engineering,Shenzhen Polytechnic University,Shenzhen Guangdong 518055)

机构地区：[1]沈阳建筑大学市政与环境工程学院,辽宁沈阳110168 [2]深圳职业技术大学材料与环境工程学院,广东深圳518055

出　　处：《环境污染与防治》2024年第6期829-835,共7页Environmental Pollution & Control

基　　金：广东省教育厅项目(服务乡村振兴重点领域专项)(No.2020ZDZX1078);深圳市科技创新委员会项目(No.20220811103716001、No.KCXFZ20201221173203010、No.20220815163819003)。

摘　　要：为探究高负荷接触稳定法(HiCS)中稳定段曝气时间(ts)对废水碳捕获的影响,分析不同ts下HiCS系统的碳捕获率及污泥性质的差异,同时分析微生物群落结构差异。结果表明:当ts为1.0、2.0、3.0 h时,碳捕获率分别为43.0%、42.4%、39.2%,显著高于ts为0.5、4.0 h的20.3%和25.3%;污泥粒径较小且分布集中、微观结构粗糙多孔,有利于污泥和有机物接触絮凝。微生物群落结构分析表明,与接种污泥相比,ts为0.5 h的HiCS污泥中变形菌门(Proteobacteria)和拟杆菌门(Bacteroidetes)的相对丰度由24.7%、25.8%上升至40.0%、30.8%。FAPROTAX功能预测结果显示,与碳循环代谢相关的微生物丰度最高,占比达到60%以上,其相对丰度受ts影响显著,在1.0~3.0 h时高于0.5、4.0 h时。In order to explore the effect of aeration time(ts) in stabilization phase on carbon capture of wastewater in high intensity contact stabilization(HiCS),the differences in carbon capture rate and sludge properties of HiCS system under different ts were analyzed,and the differences in microbial community structure were analyzed.The results showed that when ts was 1.0,2.0 and 3.0 h,the carbon capture rates are 43.0%,42.4% and 39.2%,respectively,which were significantly higher than 20.3% and 25.3% when ts was 0.5 and 4.0 h.The sludge particle size was small,the distribution was concentrated,the microstructure was rough and porous,which was conducive to the contact flocculation of sludge and organic matter.The results of microbial community structure analysis showed that compared with the inoculated sludge,the relative abundance of Proteobacteria and Bacteroidetes in the HiCS sludge with ts of 0.5 h increased from 24.7% and 25.8% to 40.0% and 30.8%.The results of FAPROTAX functional prediction showed that the microbial abundance related to carbon cycle metabolism was the highest,reaching more than 60%,and its relative abundance was significantly affected by ts,which was higher at 1.0-3.0 h than at 0.5 and 4.0 h.

关 键 词：高负荷接触稳定法 稳定段曝气时间 碳捕获 

分 类 号：X703[环境科学与工程—环境工程] X172