中文关键词厌氧折流板反应器(ABR)生活污水水力停留时间(HRT)挥发性脂肪酸(VFAs)污泥形态 英文关键词anaerobic baffled reactor (ABR)sewagehydraulic residence time(HRT)volatile fatty acids (VFAs)sludge morphology

作者	单位	E-mail
程诚	苏州科技大学环境科学与工程学院, 苏州 215009	896375932@qq.com
朱琳	苏州科技大学环境科学与工程学院, 苏州 215009
郭凯成	苏州科技大学环境科学与工程学院, 苏州 215009
汪倩	苏州科技大学环境科学与工程学院, 苏州 215009
宋家俊	苏州科技大学环境科学与工程学院, 苏州 215009
刘文如	苏州科技大学环境科学与工程学院, 苏州 215009 江苏省水处理技术与材料协同创新中心, 苏州 215009 江苏省环境科学与工程重点实验室, 苏州 215009
沈耀良	苏州科技大学环境科学与工程学院, 苏州 215009 江苏省水处理技术与材料协同创新中心, 苏州 215009 江苏省环境科学与工程重点实验室, 苏州 215009	ylshen@mail.usts.edu.cn

中文摘要 采用效果检测、粒径分布与电镜扫描等方法，研究厌氧折流板反应器（ABR）在不同水力停留时间（HRT）下污水中有机物（COD）的转化过程及污泥形态变化特征.结果表明，HRT从15 h到4 h的各运行阶段，COD去除率稳定在90.0%以上.沿程分析表明，当HRT为10、7.5、5和4 h时，ABR第一隔室分别承担约90%、78.56%、74.18%及58.91%的去碳比重，且承担COD去除的主要功能隔室由第一隔室过渡到第一、二隔室.随着HRT缩短，ABR第一隔室中挥发性脂肪酸（VFAs）总量显著上升.组成分析知，乙酸在总VFAs的比重由51.36%逐渐升高至58.77%，丁酸、丙酸含量相对较少，变化较小.随着运行时间推移，ABR中污泥形态发生显著变化，到111 d时，基本实现颗粒化；同时，沿水流方向颗粒化程度呈递减趋势.扫描电镜（SEM）观察显示，ABR一定程度上存在生物相分离现象，各隔室分别以丝状菌、甲烷多球菌、单球菌和杆菌为主. 英文摘要 The characteristics of organics transformation and sludge morphology of in an ABR(anaerobic baffled reactor) for sewage treatment with different HRTs were investigated based on reactor performance, particle size distribution, and scanning electron microscopy (SEM). Results showed that the COD removal rate was stably maintained above 90.0% when the HRT decreased from 15 h to 4 h. However, the first compartment of ABR contributed to 90%, 78.56%, 74.18%, and 58.91% of the total COD removal when the HRT was 10, 7.5, 5, and 4 h, respectively. When the HRT was reduced, the total amount of volatile fatty acids (VFAs) in the first compartment of ABR significantly increased, and the abundance of acetic acid, being the major constituent of VFAs, gradually increased from 51.36% to 58.77%; the concentrations of butyric acid and propionic acid were maintained and constituted a minority of the VFAs. The sludge morphology in ABR significantly changed in the wake of run time. On day 111, granulation of sludge was achieved. Additionally, the degree of sludge granulation showed a decreasing trend with the direction of water flow. SEM observations of granular sludge showed that the separation of biomass did occur in the ABR. Along the direction of water flow, filamentous bacteria, M. methane, monococci, and bacilli were the dominant microbes in each compartment of the ABR.

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