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活性污泥污水处理系统中胞外多聚物的作用及提取方法

李金璞,张雯雯,杨新萍*   

  1. (南京农业大学资源与环境学院环境科学与工程系, 南京 210095)
  • 出版日期:2018-09-10 发布日期:2018-09-10

The roles and extraction methods of extracellular polymeric substances in activated sludge wastewater treatment system.

LI Jin-pu, ZHANG Wen-wen, YANG Xin-ping*   

  1. (Department of Environmental Science and Engineering, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China).
  • Online:2018-09-10 Published:2018-09-10

摘要: 活性污泥污水处理系统依靠微生物代谢作用净化污水。活性污泥胞外多聚物(extracellular polymeric substances,EPS)对水中污染物的去除及污泥的絮凝、沉降、脱水性能都有着重要作用,从而影响活性污泥污水处理系统的稳定运行和性能改进。本文综述了活性污泥污水处理系统中EPS维持系统的功能作用,并对目前常见的多种活性污泥EPS提取方法进行了比较。不同的提取方法显著影响EPS的组成成分和数量,从而影响活性污泥的物理化学性质。最佳的EPS提取方法是指既能获得高的EPS数量又对污泥微生物细胞破坏最小的方法。EPS提取方法的标准化是研究活性污泥胞外多聚物的基础。根据研究目的选用适宜的EPS提取方法是阐明EPS在污水生物处理系统中的作用、改善活性污泥性能的基础。

关键词: 部分根区灌溉, 产量, 水分生产率, 棉花, 种植密度

Abstract: Activated sludge wastewater treatment system relies on microbial metabolism to clarify the sewage. Extracellular polymeric substances (EPS) of activated sludge play an important role in pollutants removal and the flocculation, settle ability and dewaterability of activated sludge, and thus affect the stability and improvement of the activated sludge process. Here, we review the role of EPS of activated sludge in wastewater treatment system and compare different extracting methods of EPS. The extraction methods can affect the EPS components and physicochemical properties of activated sludge. Researchers have tried to find the best compromise between high extraction yields and minimum cell lysis during the extraction procedure. Standardization of extraction methods is the foundation of the EPS related research. It is important to better understand the role of EPS in wastewater treatment system and improve the properties of activated sludge with research-specific extraction method of EPS.

Key words: cotton, yield, plant density, partial root zone irrigation, water productivity.