摘要
厌氧氨氧化是一种新型自养生物脱氮反应,具有节能、脱氮负荷高、无需外加碳源、污泥产生量小等优势,因而对低碳高氮废水的处理具有应用价值。然而,厌氧氨氧化菌生长速率低,常通过污泥颗粒化提升反应器的生物量。胞外聚合物(EPS)在颗粒污泥的形成和稳定方面起着至关重要的作用。为此,综述了EPS在anammox颗粒形成过程中,促进污泥聚集和维持稳定的作用,并阐明了EPS主次要成分及作用,分析了anammox颗粒污泥自身粒径大小、水质条件(有机物、氮浓度和负荷),以及外加介体(矿物质或金属离子等)对EPS含量及成分的影响,并提出未来应在anammox颗粒污泥EPS结构和成分的微观解析、强化EPS分泌以促进颗粒污泥快速形成等方面进一步开展研究,旨在为anammox颗粒污泥的大规模工程化应用提供参考。
Anaerobic ammonia oxidation(anammox)is a lithoautotrophic biological nitrogen removal process with inherent advantages of low energy consumption,high nitrogen removal loading rate,no external carbon source and low sludge generation,which can be applied for treating wastewater with low C/N ratios.However,due to the slow growth rate of anammox bacteria,biomass is commonly increased by sludge granulation in the anammox reactor.The extracellular polymer substances(EPS)play a vital role in the formation and stabilization of anammox granular sludge.Here,we reviewed the role of EPS in promoting sludge aggregation and maintaining stability during formation of anammox granular sludge,and clarified the major components and functions of EPS.In addition,the particle size of anammox particle sludge,the water quality such as organic matter,nitrogen concentration and nitrogen loading,and the additional mediators such as minerals or metal ions were evaluated on the concentration and composition of EPS of anammox granular sludge.Future research is needed in the field of the micro-analysis of the EPS structure and composition of anammox granular sludge and the enhancement of EPS secretion to promote the rapid formation of granular sludge should be carried out.The ultimate goal of this review is to provide a reference for applying anammox granular sludge technology at large scale.
作者
陈重军
曹茜斐
邹馨怡
谢军祥
谢嘉玮
常尧枫
CHEN Chongjun;CAO Qianfei;ZOU Xinyi;XIE Junxiang;XIE Jiawei;CHANG Yaofeng(School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China;Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment,Suzhou University of Science and Technology,Suzhou 215009,China;National&Local Joint Engineering Laboratory for Municipal Sewage Resource Utilization Technology,Suzhou University of Science and Technology,Suzhou 215009,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2022年第2期381-389,共9页
Chinese Journal of Environmental Engineering
基金
中国博士后科学基金(2020M671400)
江苏省自然科学基金面上项目(BK20201450)
江苏青蓝工程
江苏省环境科学与工程重点实验室开放基金(Zd1804)
江苏省研究生科研与实践创新计划(SJCX21-1397)。
关键词
厌氧氨氧化颗粒污泥
胞外多聚物
组成成分
影响因素
脱氮
anaerobic ammonia oxidation granular sludge
extracellular polymer
composition
influencing factors
nitrogen removal
作者简介
第一作者/通信作者:陈重军(1984-),男,博士,副教授,cjchen@mail.usts.edu.cn。
