SCI和EI收录∣中国化工学会会刊

›› 2016, Vol. 24 ›› Issue (10): 1369-1374.DOI: 10.1016/j.cjche.2016.05.022

• Separation Science and Engineering • 上一篇    下一篇

Treatment of compost leachate by the combination of coagulation and membrane process

Zengnian Shu1, Yaoping Lü1, Jian Huang1,2, Wenhui Zhang3   

  1. 1 College of Ecology, Lishui University, Lishui 323000, China;
    2 Institutes of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;
    3 Institute of Engineering and Design, Lishui University, Lishui 323000, China
  • 收稿日期:2015-11-04 修回日期:2016-05-11 出版日期:2016-10-28 发布日期:2016-11-19
  • 通讯作者: Jian Huang,E-mail address:huangjian@lsu.edu.cn.
  • 基金资助:
    Supported by the Natural Science Foundation of Zhejiang Province (LQ14B060001, Y14F030005), Foundation of Science and Technology Department of Zhejiang Province of China (2013C33019, 2015C33232), Science and Technology Project of Lishui City (2015RC23).

Treatment of compost leachate by the combination of coagulation and membrane process

Zengnian Shu1, Yaoping Lü1, Jian Huang1,2, Wenhui Zhang3   

  1. 1 College of Ecology, Lishui University, Lishui 323000, China;
    2 Institutes of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China;
    3 Institute of Engineering and Design, Lishui University, Lishui 323000, China
  • Received:2015-11-04 Revised:2016-05-11 Online:2016-10-28 Published:2016-11-19
  • Supported by:
    Supported by the Natural Science Foundation of Zhejiang Province (LQ14B060001, Y14F030005), Foundation of Science and Technology Department of Zhejiang Province of China (2013C33019, 2015C33232), Science and Technology Project of Lishui City (2015RC23).

摘要: This study describes the treatment of composting leachate by the combination of coagulation and nanofiltration process. Poly ferric sulfate (PSF) was used as coagulant, and the effect of pH value and PSF dosage on the coagulation performance was investigated. The results indicated that the chemical oxidation demand (COD) and turbidity removal efficiency could reach to 62.8% and 75.3%, respectively at an optimum dosage of 1200 mg·L-1 at pH 6.0. During the nanofiltration process, the operation conditions such as temperature and pressure were optimized, 89.7% of COD, 78.2% of TOC, 72.5% of TN, 83.2% of TP, and 78.6% of NH3-Nwere retained when tested at 0.6 MPa at 25℃. The final leachate effluent concentration of COD, BOD5, NH3-N, TOC, SS was 92 mg·L-1, 31mg·L-1, 21mg·L-1, 73mg·L-1 and 23mg·L-1, respectively, which reached the local discharge standard. The combination of coagulation-filtration is useful for composting leachate treatment.

关键词: Compost leachate, PFS coagulation, Nanofiltration

Abstract: This study describes the treatment of composting leachate by the combination of coagulation and nanofiltration process. Poly ferric sulfate (PSF) was used as coagulant, and the effect of pH value and PSF dosage on the coagulation performance was investigated. The results indicated that the chemical oxidation demand (COD) and turbidity removal efficiency could reach to 62.8% and 75.3%, respectively at an optimum dosage of 1200 mg·L-1 at pH 6.0. During the nanofiltration process, the operation conditions such as temperature and pressure were optimized, 89.7% of COD, 78.2% of TOC, 72.5% of TN, 83.2% of TP, and 78.6% of NH3-Nwere retained when tested at 0.6 MPa at 25℃. The final leachate effluent concentration of COD, BOD5, NH3-N, TOC, SS was 92 mg·L-1, 31mg·L-1, 21mg·L-1, 73mg·L-1 and 23mg·L-1, respectively, which reached the local discharge standard. The combination of coagulation-filtration is useful for composting leachate treatment.

Key words: Compost leachate, PFS coagulation, Nanofiltration