强化好氧颗粒污泥稳定性的研究进展
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摘要
系统回顾了有关好氧颗粒污泥稳定性方面的研究进展,简要介绍了好氧颗粒污泥的形成机理,主要包括"丝状菌假说"、"胞外聚合物假说"、"选择压驱动假说"、"自凝聚假说";着重分析了影响好氧颗粒污泥稳定性的主要因素有温度、pH值、有机负荷率与氨氮浓度、溶解氧与颗粒粒径、饱食-饥饿期、水力剪切力、污泥龄和有毒有害物质等;详细论述了抑制丝状膨胀、促进胞外聚合物的分泌、富集慢速增长的微生物和强化颗粒内核等措施可以强化好氧颗粒污泥的稳定性,并提出了对好氧颗粒污泥的形成机理以及功能菌群进行更深入的研究将会是今后的研究重点,进而为好氧颗粒污泥的工业化应用作铺垫。
This paper reviewed recent advances in aerobic granular sludge stability.The granulation mechanisms were introduced,including "fungi-enwind","EPS enhanced granulation","Selective pressure driven hypothesis","microbial self-immobilization".The effects of temperature,pH,organic loading rate,influent ammonia nitrogen concentration,dissolved oxygen,particle size,feast-famine,hydrodynamic shear force,sludge retention time,toxicant were analyzed for aerobic granule stability.The aerobic granules stability enhancements including suppressing filamentous outgrow,enriching the content of EPS,promoting slow-growing organisms and strengthening granule core were discussed,Finally,future study on the granulation mechanism and the main functional strains were proposed for industrial application.
This paper reviewed recent advances in aerobic granular sludge stability.The granulation mechanisms were introduced,including "fungi-enwind","EPS enhanced granulation","Selective pressure driven hypothesis","microbial self-immobilization".The effects of temperature,pH,organic loading rate,influent ammonia nitrogen concentration,dissolved oxygen,particle size,feast-famine,hydrodynamic shear force,sludge retention time,toxicant were analyzed for aerobic granule stability.The aerobic granules stability enhancements including suppressing filamentous outgrow,enriching the content of EPS,promoting slow-growing organisms and strengthening granule core were discussed,Finally,future study on the granulation mechanism and the main functional strains were proposed for industrial application.
引文
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[18]Liu Y,Yang S F,Tay J H,et al.Cell hydrophobicity is a triggeringforce of biogranulation[J].Enzyme.Microb.Technol.,2004,34:371-379.
[19]Tay J H,Liu Q S,Liu Y.The role of cellular polysaccharides in theformation and stability of aerobic granules[J].Letters in AppliedMicrobiology,2001,33:222-226.
[20]蔡春光,刘军深,蔡伟民,等.胞外多聚物在好氧颗粒化中的作用机理[J].中国环境科学,2004(5):112-115.
[21]王惠卿,徐颖,岳瑞校.SBR反应器结构对好氧颗粒污泥形态的影响及其动力学分析[J].工业水处理,2011(7):42-45.
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[23]Liu Y,Wang Z W,Qin L,et al.Selection pressure-driven aerobicgranulation in a sequencing batch reactor[J].Applied Microbiology andBiotechnology,2005,67:26-32.
[24]Yang S F,Tay J H,Liu Y.Respirometric activities of heterotrophic andnitrifying populations in aerobic granules developed at differentsubstrate N/COD ratios[J].Current Microbiology,2004,49(1):42-46.
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[29]暴瑞玲,于水利,王玉兰,等.温度对好氧颗粒污泥脱氮性能及颗粒稳定性的影响[J].中国环境科学,2009(7):697-701.
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[31]De Kreuk M K,Pronk M,Van Loosdrecht M C M.Formation ofaerobic granules and conversion processes in an aerobic granular sludgereactor at moderate and low temperatures[J].Water Res.,2005,39:4476-4484.
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