Research Progress on Side Flow Characteristics and Nitrogen and Phosphorus Recovery Technology of Municipal Wastewater
A comprehensive classification,summary,and comparative analysis are conducted on the charac-teristics 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 sys-tem.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 appli-cation scenarios are analyzed.The key points that need to be considered in the future research and applica-tion of side flow nitrogen and phosphorus resource recovery technology are identified.
municipal wastewaterside flowcharacteristicnitrogen and phosphorusresource recovery