好氧颗粒污泥处理低碳氮比实际生活污水的运行效能  

Performance and analysis of aerobic granular sludge treating actual domestic sewage with low C/N ratios

作　　者：宋昀达 张丽丽 苏本生[1] 薛晓飞 李鑫玮 刘晓琳 任钦毅 陈翰 SONG Yunda;ZHANG Lili;SU Bensheng;XUE Xiaofei;LI Xinwei;LIU Xiaolin;REN Qinyi;CHEN Han(College of Chemical Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Beijing Enterprises Water Group(China)Investment Limited,Beijing 100102,China)

机构地区：[1]北京化工大学化学工程学院,北京100029 [2]北控水务(中国)投资有限公司,北京100102

出　　处：《环境工程学报》2020年第11期2999-3006,共8页Chinese Journal of Environmental Engineering

摘　　要：以低碳氮比实际生活污水为基质,在不外加碳源的前提下,在序批式活性污泥反应器(SBR)内培养好氧颗粒污泥(AGS)。结果表明:经过30 d的连续运行可成功培养出好氧颗粒污泥,成熟的好氧颗粒污泥SVI约为50 mL·g-1,MLSS为4.5 g·L-1左右,平均粒径达到608.3μm;反应器连续运行超过180 d,在整个运行过程中,以C/N为2~6的实际生活污水为基质,COD平均去除率为89.5%,TN平均去除率为78.5%,TP平均去除率可达70%以上。好氧颗粒污泥脱氮除磷的沿程实验结果显示,其可实现同步高效脱氮除磷,氮的去除主要源于同步硝化反硝化,其独特的分层结构能够保证在外部较高的溶解氧环境下颗粒污泥内部同时完成反硝化过程。In this study, actual domestic sewage with low C/N ratios was taken as substrate, aerobic granular sludge(AGS) was cultivated in a sequence batch reactor(SBR) without adding extra carbon source. The results showed that AGS was successfully cultivated within 30 d. The MLSS and SVI of mature AGS were about4.5 g·L-1 and 50 mL·g-1, respectively, and its average size was 608.3 μm. The SBR was continuously operated for longer than 180 d. During the running period, the average removal rates of COD, TN and TP were 87.5%,78.5%, and higher than 70% when the substrate of actual domestic sewage with the C/N ratio of 2~6,respectively. The nitrogen and phosphorus removal experiments for AGS along the typical cycle showed that the simultaneous and high efficient nitrogen and phosphorus removals could be achieved. Nitrogen removal was mainly attributed to the simultaneous nitrification and denitrification. The unique layered structure of AGS could ensure the progress of the denitrification process inside the granular sludge with a high external dissolved oxygen environment.

关 键 词：实际生活污水 好氧颗粒污泥 低碳氮比 脱氮除磷 

分 类 号：X703[环境科学与工程—环境工程]