低碳源污水深度脱氮除磷工艺的经济性分析及优化策略
Economic Analysis and Optimization Strategy of Advanced Denitrification and Dephosphorization for Low Carbon Source Wastewater Treatment
田海成 1杨红红 1焦文海 1王磊 1梁瑜海 2吕育锋3
作者信息
- 1. 济南市市政工程设计研究院<集团>有限责任公司,山东济南 250001
- 2. 华南农业大学资源环境学院,广东广州 510642
- 3. 中国水利水电科学研究院,北京 100038
- 折叠
摘要
我国污水处理厂普遍面临进水低碳源问题,同时各地区越来越严格的污水深度脱氮除磷排放标准也使得碳源投加成本日益增加.AAO工艺中的生物除磷与反硝化脱氮之间存在碳源争夺矛盾,采用生物除磷方式去除 1 mg/L磷所消耗的BOD5 药剂成本为 0.154 元/(m3 污水),反硝化脱氮去除 1 mg/L氮所消耗的BOD5 药剂成本为 0.038 元/(m3 污水).因此,采用生物除磷方式去除 1 mg/L磷所消耗的BOD5 可供反硝化去除 4 mg/L的氮.而采用化学除磷方式去除 1 mg/L磷所消耗的混凝剂药剂成本以及污泥增加量产生的处理与处置成本合计为 0.040 元/(m3 污水),因此,采用生物除磷的成本相当于化学除磷成本的 3.85 倍.对于低碳源污水的深度脱氮除磷,采用化学除磷代替生物除磷的AOAO+化学除磷工艺具有运行成本低的优势.
Abstract
The wastewater treatment plants(WWTPs)are facing the problem of low carbon source at home,and the cost of adding carbon source is increasing due to the increasingly strict discharge standard of deep nitrogen and phosphorus removal from wastewater in different regions.In AAO process,there is competition for carbon source between biological phosphorus removal and denitrification nitrogen removal.The cost of BOD5 reagent to remove 1 mg/L phosphorus by biological phosphorus removal is 0.154 yuan/m3,the BOD5 cost of denitrifying nitrogen removal is 0.038 yuan/m3,so the BOD5 consumption of biological phosphorus removal can be used for denitrifying nitrogen removal of 4 mg/L.The total cost of coagulant reagent and the treatment and disposal cost of the increased amount of sludge for chemical phosphorus removal is 0.040 yuan/m3,therefore,the cost of biological phosphorus removal is 3.85 times of that of chemical phosphorus removal.For advanced nitrogen and phosphorus removal from low carbon source wastewater,AOAO+chemical phosphorus removal process,which uses chemical phosphorus removal instead of biological phosphorus removal,has the advantage of low operation cost.
关键词
低碳源/深度脱氮除磷/生物除磷/化学除磷/AOAO/运行成本Key words
low carbon source/advanced denitrification and dephosphorization/biological phosphorus removal/chemical phosphorus removal/AOAO process/operation cost引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据