Alternating nitrogen feeding strategy induced aerobic granulation:Influencing conditions and mechanism

作     者：Chunli Wan Zhengwen Li Yanggui Shen Xiang Liu Chunli Wan;Zhengwen Li;Yanggui Shen;Xiang Liu

作者机构：Department of Environmental Science and EngineeringFudan UniversityShanghai 200438China College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150001China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2021年第33卷第11期

页      面：135-147页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China(No.42077213) the Natural Science Foundation of Shanghai(Nos.19ZR1403700 and 20ZR1406100) 

主　　题：Aerobic granule sludge Granulation Alternating nitrogen feeding Cultivation 

摘      要：Effective cultivation of stable aerobic granular sludge(AGS)is a crucial step in the successful application of this technology,and the formation of AGS could be facilitated by some environmental stress *** identical sequencing batch reactors(SBRs)were established to investigate the aerobic granulation process under the same alternating ammonia nitrogen feeding strategy superimposed with different environmental conditions(inorganic carbon source,temperature,N/COD).Although various superimposed conditions induced a significant difference in the size,settling velocity,mechanic strength of AGS,mature aerobic granules could be successfully obtained in all four reactors after 70 days’operation,indicating the alternating ammonia nitrogen feeding strategy was the most critical factor for AGS *** on the results of redundancy analysis,the presence of an inorganic carbon source could facilitate the cultivation of AGS with nitrification function,while the moderate temperature and fluctuant N/COD might benefit the cultivation of more stable *** addition,superimposed stress conditions could result in the difference in the microbial population between four reactors,but the population diversity and abundance of microorganisms were not the determinants of AGS *** study provided an effective method for the cultivation of AGS by using alternating ammonia nitrogen feeding strategy.