大型MBR再生水厂零碳源投加脱氮的探索与实践  

Exploration and practice of zero-carbon source dosege denitrification in large-scale MBR reclaimed water plant

作　　者：任天昊 程秋音[1] 阜崴 曹静 郭俊温[1] 张铁军 马文 REN Tianhao;CHENG Qiuyin;FU Wei;CAO Jing;GUO Junwen;ZHANG Tiejun;MA Wen(Beijing Drainage Group Co.,Ltd.,Beijing 100083,China)

机构地区：[1]北京城市排水集团有限责任公司,北京100083

出　　处：《给水排水》2021年第10期39-44,共6页Water & Wastewater Engineering

摘　　要：为提高大型MBR再生水厂生物脱氮效率,降低外加碳源成本,从物料平衡的角度出发,研究同步硝化反硝化、生物合成、缺氧反硝化等因素对于生物脱氮的贡献.并结合配水优化、水力负荷控制、内回流消氧等多种工艺管控手段,对某大型MBR再生水厂脱氮过程进行全面优化.结果表明,某水厂总氮的去除主要通过剩余污泥排放和缺氧反硝化两个方面实现;以氨氮为指示物并配合进水闸门改造工作,能够明显提高生物池配水均匀度;建立物料平衡模型,并结合运行管控手段,某水厂在进水BOD_(5)/TN均值为2.75的情况下,系统脱氮效率为77%,进水总氮去除率为89%,并实现了2021年零碳源投加脱氮.In order to improve the biological denitrification efficiency and reduce the cost of external carbon source in a large-scale MBR recycled water plant,the contribution of simultaneous nitrification and denitrification,biosynthesis,anoxic denitrification and other factors to biological denitrification was studied based on the perspective of material balance.The denitrification efficiency was optimized by combining various process control methods,such as influent distribution optimization,hydraulic load control,internal reflux oxygen control and,etc.The results show that the removal of total nitrogen is mainly through excess sludge discharge and anoxic denitrification.The ammonia nitrogen concentration at the end of anoxic zone can be used as the indicator of influent distribution among different series,and the operator can adjust the inlet gate opening degree for modification.The material balance model was established and combined with operational control methods.Under the condition that the average influent BOD_(5)/TN of the influent was around 2.75.the denitrification efficiency of the system was 77%,the total nitrogen removal rate of influent water was 89%,and the zero-carbon source dosage denitrification was accomplished in 2021.

关 键 词：生物脱氮 物料平衡 配水优化 零碳源 

分 类 号：TU992[建筑科学—市政工程]