|本期目录/Table of Contents|

[1]蒋心茹,姬高升,刘杨,等.市政污泥胞外聚合物(EPS)的形成过程与解聚方法研究进展[J].应用与环境生物学报,2020,26(05):1282-1289.[doi: 10.19675/j.cnki.1006-687x.2019.10014]
 JIANG Xinru,,et al.Overview of extracellular polymeric substance (EPS) generation and disaggregation in municipal sewage sludge[J].Chinese Journal of Applied & Environmental Biology,2020,26(05):1282-1289.[doi: 10.19675/j.cnki.1006-687x.2019.10014]
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市政污泥胞外聚合物(EPS)的形成过程与解聚方法研究进展()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
26卷
期数:
2020年05期
页码:
1282-1289
栏目:
综述
出版日期:
2020-10-25

文章信息/Info

Title:
Overview of extracellular polymeric substance (EPS) generation and disaggregation in municipal sewage sludge
作者:
蒋心茹姬高升刘杨房俊楠许力山谢炎东闫志英
1中国科学院成都生物研究所,中国科学院环境与应用微生物重点实验室 成都 610041 2中国科学院大学 北京 100049 3环境微生物四川省重点实验室 成都 610041 4广西师范大学 桂林 541004
Author(s):
JIANG Xinru1 2 3 JI Gaosheng1 2 3 LIU Yang1 2 3 FANG Junnan1 2 3 XU Lishan1 3 XIE Yandong4 & YAN Zhiying1 3?
1 Laboratory of Environmental and Applied Microbiology, Chengdu Institute of Biology, Chinese Academy of Science, Chengdu 610041, China 2 University of Chinese Academy of Science, Beijing 100049, China 3 Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu 610041, China 4 Guangxi Normal University, Guilin 541004, China
关键词:
城市污泥厌氧消化细胞外聚合物预处理
Keywords:
municipal sludge anaerobic digestion extracellular polymeric substance (EPS) pretreatment
DOI:
10.19675/j.cnki.1006-687x.2019.10014
摘要:
市政污泥厌氧发酵能将污泥所含有机质转化为能源物质甲烷,使污泥实现“减量化”、“无害化”、“资源化”,但发酵效率与污泥胞外聚合物(extracellular polymeric substance,EPS)的降解程度密切相关. 综述了EPS的形成机理、解聚方法及其组分检测技术. 主要结论为EPS由多聚糖类、脂质、蛋白质、DNA以及某些小分子类物质相互结合、聚集而成. 根据物质之间结合的紧密程度,EPS可分为4个层次,因此EPS解聚方法通过对其结构破坏程度不同而表现出不同的EPS溶解率. 解聚方法大致可分为物理、化学和生物3种,其中生物法效果显著、反应条件温和、反应过程能耗低且对环境无二次污染,具有巨大的应用前景. EPS组分检测技术通过监测EPS中金属离子、腐殖质、水分等的迁移以及污泥结构变化,评价EPS降解程度,为理解污泥厌氧发酵过程、提高污泥厌氧发酵效率提供新的视角和观点,同时为实现污泥厌氧发酵沼渣农林化利用提供理论支撑. 最后提出EPS作为有机聚合体,生物预处理法优势明显,能在提高EPS溶解率的同时减少厌氧反应抑制物生成,实现污泥生物质资源的高效安全利用. (图4 表2 参67)
Abstract:
Municipal sewage sludge anaerobic digestion can turn sewage sludge organics into methane, which makes it reduction, harmless, and recyclable. This previous studies demonstrated that the reaction efficiency is strongly linked with extracellular polymeric substance (EPS) degradation. The paper introduces the formation mechanism, disaggregation methods, and detection technologies of EPS. The main ideas include the following: EPS consists of polysaccharides, lipids, proteins, DNA, and smaller molecules bound together. According to the strength of the binding substances, EPS can be classified into four layers from the outside to the center. Therefore, the dissolution rate of EPS is determined by the different destroying degrees for the structure. Disaggregation methods can be classified into three types: physical, chemical, and biological. Biological methods have features that are advantageous. These include significant degradation, mild reaction conditions, low energy consumption, and no secondary pollution. Developing detection technologies evaluate the EPS degradation level by monitoring the migration of metal ions, humics, water, and EPS components, and changes in the sludge structure. These technologies offer new perspectives on the process of sewage sludge anaerobic digestion and how to improve the efficiency of anaerobic digestion. At the same time, they provide theoretical support for the agricultural and forestry utilization of biogas residues. Finally, we propose that, as EPS consists of organic polymers, it can be used more effectively after biological pretreatments because of enhanced dissolution and a reduction in the generation of inhibitors for anaerobic digestion. Only in this way can we utilize sewage sludge biomass appropriately and safely.

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更新日期/Last Update: 2020-10-25