连续曝气SBR快速培养AGS及反应器流态的CFD解析  

Rapid Cultivation of AGS by Continuous Aeration SBR and CFD Analysis of Reactor Flow Pattern

作　　者：肖飞 王维红[1] XIAO Fei;WANG Wei-hong(College of Water Conservancy and Civil Engineering,Xinjiang Agricultural University,Urumqi,Xinjiang 830052,China;College of Water Resources and Architectural Engineering,Tarim University,Aral,Xinjiang 843300,China)

机构地区：[1]新疆农业大学水利与土木工程学院,新疆乌鲁木齐830052 [2]塔里木大学水利与建筑工程学院,新疆阿拉尔843300

出　　处：《环境监测管理与技术》2022年第6期64-68,共5页The Administration and Technique of Environmental Monitoring

基　　金：国家自然科学基金资助项目(51968071)。

摘　　要：配制模拟番茄酱废水,在高径比为10的SBR反应器中,考察连续曝气条件下好氧颗粒污泥(AGS)的除污性能和微生物特性的变化。建立流体动力学模型,模拟反应器中气-液-污泥三相流的流态,以了解其对污泥颗粒化的影响机理。结果表明:污泥完全颗粒化后,对番茄酱废水中COD、NH_(3)-N和PO_(4)^(3-)-P的去除率分别为94.37%、93.55%和90.92%;绿弯菌门(Chloroflexi)、拟杆菌门(Bacteroidetes)和厚壁菌门(Firmicutes)丰度显著提高,假丝酵母菌(Candidatus saccharibacteria)为除磷功能微生物;反应器内的流态结构呈环流和旋涡流,水力剪切力的大小与颗粒粒径呈正相关,颗粒形态与流态分布有关。Simulated tomato paste wastewater was prepared in a SBR reactor with a height to diameter ratio of 10,the decontamination performance and the change of microbial characteristics of aerobic granular sludge(AGS) were investigated under continuous aeration condition.A fluid dynamics model was established to simulate the three-phase flow pattern of gas-liquid-sludge in the reactor to understand the influence mechanism on sludge granulation.The results showed that the removal rates of COD,NH_(3)-N and PO_(4)^(3-)-P in tomato paste wastewater were 94.37%,93.55%and 90.92%,respectively after the sludge was completely granulated.The abundance of Chloroflexi,Bacteroidetes and Firmicutes increased significantly.Candida saccharibacteria was phosphorus removal microorganism.The flow pattern structure in the reactor was circulatory and vortex.Hydraulic shear force was positively related to particle size,and particle shape was related to flow pattern distribution.

关 键 词：好氧颗粒污泥 流体动力学 除污性能 连续曝气 微生物特性 

分 类 号：X703[环境科学与工程—环境工程]