张耀斌

239

  • 教授     博士生导师   硕士生导师
  • 性别:男
  • 毕业院校:大连理工大学
  • 学位:博士
  • 所在单位:环境学院
  • 学科:环境科学与工程. 环境工程. 环境科学
  • 办公地点:环境楼B301
  • 电子邮箱:zhangyb@dlut.edu.cn

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开通时间:2017.4.27

最后更新时间:2017.4.27

Enhancement of sludge granulation in a zero valence iron packed anaerobic reactor with a hydraulic circulation

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论文类型:期刊论文

发表时间:2011-02-01

发表刊物:PROCESS BIOCHEMISTRY

收录刊物:Scopus、SCIE、EI

卷号:46

期号:2

页面范围:471-476

ISSN号:1359-5113

关键字:Zero valent iron; Anaerobic; Granulation; Mass transfer

摘要:Considering that Zero valent iron (ZVI) is expected to create a favorable environment for methanogenesis, we developed a ZVI packed anaerobic reactor system with a hydraulic circulation to enhance the anaerobic granulation. The reactor was operated without the circulation first, but it displayed slow granulation and low stability as increasing influent COD. When the hydraulic circulation around the ZVI packing bed was conducted, the average size of granule grew from rapidly 247 mu m to 814 mu m in the following 15 d, while the granule growth was unobvious in a reference reactor without ZVI. The reason for the enhanced granulation with the circulation was ascribed that the reaction of ZVI was intensified, which was confirmed by the results that the circulation increased Fe2+ leaching and decreased the oxidation-reduction potential in the reactor. Meantime, Fe2+ increased production of extracellular polymeric substances, which benefited sludge aggregation. Fluorescence in situ hybridization test revealed that the abundance of methanogens of the sludge increased with applying the circulation. (C) 2010 Elsevier Ltd. All rights reserved.