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The granulation process and pollutant removal performance of aerobic granular sludge (AGS) under conventional and micro-nano aeration modes were investigated, with focus on the roles of extracellular polymeric substances (EPS) and microbial community succession in mediating microstructural responses. Compared to conventional aeration, the micro-nano aeration exhibited superior oxygen mass transfer efficiency and higher hydroxyl radical (·OH) generation, leading to significantly enhanced pollutant removal. Ammonia and chemical oxygen demand (COD) removal efficiencies consistently exceeded95%, while total nitrogen removal remained at a high level of 78.81%. Micro-nano aeration also accelerated AGS granulation, with mean particle sizes surpassing300 μm within20days. XDLVO-based interaction energy calculations indicated favorable aggregation behavior under both aeration regimes. Due to the biofilm-promoting effects of micro-nano aeration system, AGS developed contained higher EPS content under this mode, with Hydrophobic TB-PN playing a key role in forming protein-based hydrophobic networks that promoted AGS granulation. In contrast, AGS stability in the conventional system was primarily maintained via ionic bridging by Ionic TB-PS. Distinct microbial community structures were observed between the two aeration modes. Conventional aeration favored typical denitrifying bacteria, whereas the intensified of micro-nano aeration system led to a proliferation of filamentous taxa, notably Neomegalonema, Thiothrix, and norank_f_Saprospiraceae. These filamentous bacteria contributed to EPS secretion and AGS structural integrity while maintaining stable nitrogen removal performance.

, authors=Xin ZHANG1, Kai-wen HUANG1, Qian ZHAO1, Li-wen XIAO1, Shuo WANG1, 2, *, Ji LI1, 2, authorsList=Xin ZHANG, Kai-wen HUANG, Qian ZHAO, Li-wen XIAO, Shuo WANG, Ji LI, authorCompany=null, correspAuthors=Shuo WANG, authorNote=null, correspAuthorsNote=null, copyrightStatement=null, copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, fund=null), CN=ArticleExt(id=1314917733800706569, articleId=1314917731636445703, tenantId=1146029695717560320, journalId=1234093305789726721, language=CN, title=微纳米曝气促进好氧颗粒污泥形成的微观机制解析, columnId=1234106386565624579, journalTitle=中国环境科学, columnName=水污染与控制, runingTitle=null, highlight=null, articleAbstract=

通过研究常规曝气与微纳米曝气模式下好氧颗粒污泥(AGS)的颗粒化进程与污染物的去除效果,同时结合胞外聚合物(EPS)与微生物群落演替,分析不同曝气模式下AGS的微观响应特征.结果表明,相较于常规曝气模式,微纳米曝气体系具有更高的氧气传质效率与羟基自由基(·OH)产生量,可以显著提升AGS对污染物的去除效果,氨氮、化学需氧量(COD)的去除率始终稳定在95%以上,总氮去除率则能维持在78.81%的较高处理水平.微纳米曝气还可促进AGS的快速颗粒化,平均粒径在20d后超过300μm.且XDLVO理论计算结果表明两种曝气模式下AGS均具有良好的聚集性能.由于微纳米气泡具有促进生物膜生长的作用,微纳米曝气体系中的AGS具有含量更丰富的EPS,主要依靠Hydrophobic TB-PN形成蛋白质结构的疏水网络促进AGS形成,而常规曝气体系更多是依靠Ionic TB-PS的离子架桥作用增强AGS的稳定性.两种曝气体系中的微生物群落存在较大差异,常规曝气体系中多是常见的反硝化优势菌属,而微纳米曝气体系由于存在较高的曝气强度,导致丝状菌属出现了激增现象,优势菌群以Neomegalonema、Thiothrix和norank_f_Saprospiraceae为主,在为AGS分泌EPS形成骨架的同时,也能保证系统脱氮性能的稳定.

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张欣(2000-),女,江苏常州人,硕士研究生,主要研究方向为污水处理技术与好氧颗粒污泥研究.发表论文1篇..

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张欣(2000-),女,江苏常州人,硕士研究生,主要研究方向为污水处理技术与好氧颗粒污泥研究.发表论文1篇..

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张欣(2000-),女,江苏常州人,硕士研究生,主要研究方向为污水处理技术与好氧颗粒污泥研究.发表论文1篇..

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微纳米曝气促进好氧颗粒污泥形成的微观机制解析
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张欣 1 , 黄凯文 1 , 赵倩 1 , 肖丽雯 1 , 王硕 1, 2, * , 李激 1, 2
中国环境科学 | 水污染与控制 2025,45(8): 4275-4285
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中国环境科学 |水污染与控制 2025 , 45 (8) : 4275 -4285
微纳米曝气促进好氧颗粒污泥形成的微观机制解析
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张欣(2000-),女,江苏常州人,硕士研究生,主要研究方向为污水处理技术与好氧颗粒污泥研究.发表论文1篇..

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张欣(2000-),女,江苏常州人,硕士研究生,主要研究方向为污水处理技术与好氧颗粒污泥研究.发表论文1篇..

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张欣1 , 黄凯文1, 赵倩1, 肖丽雯1, 王硕1, 2, * , 李激1, 2
作者信息
  • 1.江南大学环境与生态学院,江苏省厌氧生物技术重点实验室,江苏 无锡 214122
  • 2.江苏省高校水处理技术与材料协同创新中心,江苏 苏州 215009
通讯作者:
* 责任作者,副教授,
作者简介:

张欣(2000-),女,江苏常州人,硕士研究生,主要研究方向为污水处理技术与好氧颗粒污泥研究.发表论文1篇..

Analysis of the microscopic mechanism of micro-nano aeration to promote the formation of aerobic granular sludge
Xin ZHANG1 , Kai-wen HUANG1, Qian ZHAO1, Li-wen XIAO1, Shuo WANG1, 2, * , Ji LI1, 2
Affiliations
  • 1.Jiangsu Key Laboratory of Anaerobic Biotechnology, School of Environment and Ecology, Jiangnan University, Wuxi 214122, China
  • 2.Jiangsu College Water Treatment Technology and Material Collaborative Innovation Center, Suzhou215009, China
出版时间: 2025-08-20
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通过研究常规曝气与微纳米曝气模式下好氧颗粒污泥(AGS)的颗粒化进程与污染物的去除效果,同时结合胞外聚合物(EPS)与微生物群落演替,分析不同曝气模式下AGS的微观响应特征.结果表明,相较于常规曝气模式,微纳米曝气体系具有更高的氧气传质效率与羟基自由基(·OH)产生量,可以显著提升AGS对污染物的去除效果,氨氮、化学需氧量(COD)的去除率始终稳定在95%以上,总氮去除率则能维持在78.81%的较高处理水平.微纳米曝气还可促进AGS的快速颗粒化,平均粒径在20d后超过300μm.且XDLVO理论计算结果表明两种曝气模式下AGS均具有良好的聚集性能.由于微纳米气泡具有促进生物膜生长的作用,微纳米曝气体系中的AGS具有含量更丰富的EPS,主要依靠Hydrophobic TB-PN形成蛋白质结构的疏水网络促进AGS形成,而常规曝气体系更多是依靠Ionic TB-PS的离子架桥作用增强AGS的稳定性.两种曝气体系中的微生物群落存在较大差异,常规曝气体系中多是常见的反硝化优势菌属,而微纳米曝气体系由于存在较高的曝气强度,导致丝状菌属出现了激增现象,优势菌群以Neomegalonema、Thiothrix和norank_f_Saprospiraceae为主,在为AGS分泌EPS形成骨架的同时,也能保证系统脱氮性能的稳定.

好氧颗粒污泥  /  微纳米曝气  /  XDLVO理论  /  胞外聚合物  /  微生物群落

The granulation process and pollutant removal performance of aerobic granular sludge (AGS) under conventional and micro-nano aeration modes were investigated, with focus on the roles of extracellular polymeric substances (EPS) and microbial community succession in mediating microstructural responses. Compared to conventional aeration, the micro-nano aeration exhibited superior oxygen mass transfer efficiency and higher hydroxyl radical (·OH) generation, leading to significantly enhanced pollutant removal. Ammonia and chemical oxygen demand (COD) removal efficiencies consistently exceeded95%, while total nitrogen removal remained at a high level of 78.81%. Micro-nano aeration also accelerated AGS granulation, with mean particle sizes surpassing300 μm within20days. XDLVO-based interaction energy calculations indicated favorable aggregation behavior under both aeration regimes. Due to the biofilm-promoting effects of micro-nano aeration system, AGS developed contained higher EPS content under this mode, with Hydrophobic TB-PN playing a key role in forming protein-based hydrophobic networks that promoted AGS granulation. In contrast, AGS stability in the conventional system was primarily maintained via ionic bridging by Ionic TB-PS. Distinct microbial community structures were observed between the two aeration modes. Conventional aeration favored typical denitrifying bacteria, whereas the intensified of micro-nano aeration system led to a proliferation of filamentous taxa, notably Neomegalonema, Thiothrix, and norank_f_Saprospiraceae. These filamentous bacteria contributed to EPS secretion and AGS structural integrity while maintaining stable nitrogen removal performance.

aerobic granular sludge  /  micro-nano aeration  /  XDLVO theory  /  extracellular polymer  /  microbial community
张欣, 黄凯文, 赵倩, 肖丽雯, 王硕, 李激. 微纳米曝气促进好氧颗粒污泥形成的微观机制解析. 中国环境科学, 2025 , 45 (8) : 4275 -4285 .
Xin ZHANG, Kai-wen HUANG, Qian ZHAO, Li-wen XIAO, Shuo WANG, Ji LI. Analysis of the microscopic mechanism of micro-nano aeration to promote the formation of aerobic granular sludge[J]. China Environmental Science, 2025 , 45 (8) : 4275 -4285 .
  • 国家自然科学基金资助项目(52470036)
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  • 接收时间:2025-01-22
  • 首发时间:2026-10-08
  • 出版时间:2025-08-20
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  • 收稿日期:2025-01-22
基金
国家自然科学基金资助项目(52470036)
作者信息
    1.江南大学环境与生态学院,江苏省厌氧生物技术重点实验室,江苏 无锡 214122
    2.江苏省高校水处理技术与材料协同创新中心,江苏 苏州 215009

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* 责任作者,副教授,
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2种不同金属材料的力学参数
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属
Genus
种数
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species
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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