区间内低有机负荷波动对好氧颗粒污泥的响应  

Response of aerobic granular sludge to fluctuation of low organic load in a limited range

作　　者：宋欣 孙士权[1,2,3] 商光琦 张伟 蒋昌波 周乐安[1,2,3] 高阳 张允宝 吴方同[1,2,3] SONG Xin;SUN Shiquan;SHANG Guangqi;ZHANG Wei;JIANG Changbo;ZHOU Lean;GAO Yang;ZHANG Yunbao;WU Fantong(School of Hydraulic Engineering,Changsha University of Science&Technology,Changsha,410004,China;Engineering and Technical Center of Hunan Provincial Environmental Protection for River Lake Dredging Pollution Control,Changsha 410114,China;Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province,Changsha 410114,China)

机构地区：[1]长沙理工大学水利工程学院,湖南长沙410114 [2]湖南省环境保护河湖污染控制工程技术中心,湖南长沙410114 [3]洞庭湖水环境治理与生态修复湖南省重点实验室,湖南长沙410114

出　　处：《环境保护科学》2021年第5期95-102,共8页Environmental Protection Science

基　　金：国家自然科学基金项目(51309032);湖南省交通运输厅科技进步与创新项目(201802);湖南省教育厅优秀青年基金项目(17B014);湖南省自然科学基金项目(2020JJ4612);湖南省研究生科研创新项目(CX2018B554);湖南省重点领域研发项目(2019SK2191)。

摘　　要：在低有机负荷区间(1.2~3.6 kg/(m^(3)·d))内升降有机负荷率(OLRs),探究其对好氧颗粒污泥(AGS)的形成及污染物的去除影响。结果表明:连续提高OLRs,可促进颗粒污泥形成系统生物量增加;AGS形成过程,TP与TN去除效果逐步提高至98.75%与91.40%,且COD与-N去除率均高于95%。连续降低OLRs时,大颗粒污泥出现裂解,TP与TN去除率降低;碎片再颗粒化时,TP去除率有上升趋势,而TN去除率随OLRs降低而降低。微生物多样性检测结果表明:OLRs波动系统培养出的优势菌为Paracoccus、Meganema,而其他类菌属相对丰度缩小,反应器内的生态系统变得脆弱。The organic load rate(OLRs)was raised or reduced within the limit of 1.2~3.6 kg/(m^(3)·d)to explore its influence on the formation of the aerobic granular sludge(AGS)and the removal of pollutants.The results showed that the persistent increase of OLRs could promote the particle formation and enrich the biomass.During the formation operation,the removal efficiency of TP and TN gradually elevated to 98.75%and 91.40%,and the removal efficiency of COD and NH_4)^(+)were both greater than 95%.When OLRs was continuously reduced,large particles were cracked and the removal rates of TP and TN were decreased.When the fragments were granulated,the TP removal rate showed a positive trend,while the TN removal rate decreased with the decrease of OLRs.The microbial diversity test results showed that the dominant bacteria cultivated by OLRs were Paracoccus and Meganema,while the relative abundance of other bacteria decreased,resulting in a fragile ecosystem in the reactor.

关 键 词：有机负荷率 颗粒结构 污染物 含氮化合物 微生物多样性 

分 类 号：X192[环境科学与工程—环境科学]