周期循环式活性污泥法工艺优化提升低碳氮比城镇污水脱氮效能研究  

Cyclic Activated Sludge System-based Process Optimization to Improve Denitrification Efficiency of Low C/N Municipal Wastewater

作　　者：庞维海[1,2] 李惠平 张琨 王曦 谢丽[1,2] PANG Weihai;LI Huiping;ZHANG Kun;WANG Xi;XIE Li(Key Laboratory of Yangtze River Water Environment,Ministry of Education,Tongji University,Shanghai 200092,China;College of Environmental Science and Engineering,Tongji University,Shanghai 200092,China;GUANGDONG GDH Water Co.,Ltd.,Shenzhen 518021,China;Tongji Architectural Design(Group)Co.Ltd.,Shanghai 200092,China)

机构地区：[1]同济大学长江水环境教育部重点实验室,上海200092 [2]同济大学环境科学与工程学院,上海200092 [3]广东粤海水务股份有限公司,深圳518021 [4]同济大学建筑设计研究院(集团)有限公司,上海200092

出　　处：《同济大学学报（自然科学版）》2021年第9期1257-1264,共8页Journal of Tongji University:Natural Science

基　　金：广东省应用型科技研发及重大科技成果转化专项(2017B020236004)。

摘　　要：碳氮比(C/N)是制约污水净化过程脱氮效率的重要因素之一。以周期循环式活性污泥法(CASS)工艺为基础,分别考察了排水比、曝气时间以及进水模式对C/N=1.8的低碳源生活污水脱氮效果的影响。研究结果表明,在低C/N值进水下,排水比是影响CASS脱氮效果的最主要因素。当排水比分别为30%、40%和50%时,CASS工艺出水的TN平均质量浓度分别为17.8 mg·L-1、9.5 mg·L-1和6.6 mg·L-1,TN去除效果随排水比增加而显著提升;因此,对于CASS工艺而言,排水比宜根据C/N进行适当调整,而不应该统一设置成30%。Carbon-to-nitrogen ratio(C/N)is one of the most important factors affecting aerobic denitrification effect. Based on the cyclic activated sludge system(CASS)process with low-carbon(C/N=1.8)influent,the effects of drainage ratio,aeration time,and water intake mode on denitrification effect are investigated separately.The results show that limited by the influent carbon source concentration,the drainage ratio is the main factor affecting the nitrogen removal efficiency. The average total nitrogen(TN)concentration of CASS effluent was17.8 mg·L-1,9.5 mg·L-1 and 6.6 mg·L-1 when the drainage ratio was 30%,40% and 50%,respectively;Therefore,for CASS process, the drainage ratio should be adjusted appropriately according to the carbon nitrogen ratio instead of being set to 30%.

关 键 词：低碳氮比 周期循环式活性污泥法 工艺优化 碳源分配 

分 类 号：X524[环境科学与工程—环境工程]