城市污水侧流特性及其氮磷回收技术研究进展

Research Progress on Side Flow Characteristics and Nitrogenand Phosphorus Recovery Technology of Municipal Wastewater

针对城市污水处理系统中存在的3种侧流(初级污泥浓缩侧流、生物污泥浓缩侧流、厌氧消化污泥上清侧流)的特性进行了全面的分类总结和对比分析,探讨了侧流特性对整个污水处理系统效能的影响,指出了水、能源和营养物的回收是实现污水处理厂向水资源回收设施转变的关键,并在此基础上对城市污水处理系统侧流中氮、磷的主要回收技术进行了归纳总结,分析了不同技术在对应应用场景中的优势和限制,指明了侧流氮、磷资源回收技术在未来的研究和应用中需要考虑的重点。

A comprehensive classification,summary,and comparative analysis are conducted on the characteristics of three types of side flows(primary sludge concentration side flow,biological sludge concentration side flow,and anaerobic digestion sludge supernatant side flow)in municipal wastewater treatment system.The impact of side flow characteristics on the efficiency of the entire wastewater treatment system is discussed,and it is pointed out that the recovery of water,energy,and nutrients is the key to realizing the transformation of wastewater treatment plants into water resources recovery facilities.Based on it,the main recovery technologies for nitrogen and phosphorus in the side flow of municipal wastewater treatment system are summarized,and the advantages and limitations of different technologies in corresponding application scenarios are analyzed.The key points that need to be considered in the future research and application of side flow nitrogen and phosphorus resource recovery technology are identified.