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Article Navigation >  Journal of Environmental Engineering Technology  > 2020  >  10(1): 85-90
GONG Zheng, WANG Hui, CHEN Xuemin, TIAN Weiping, FU Xiaoyong. Impacts of vermicompost on degradation of municipal sludge[J]. Journal of Environmental Engineering Technology, 2020, 10(1): 85-90. doi: 10.12153/j.issn.1674-991X.20190036
Citation: GONG Zheng, WANG Hui, CHEN Xuemin, TIAN Weiping, FU Xiaoyong. Impacts of vermicompost on degradation of municipal sludge[J]. Journal of Environmental Engineering Technology, 2020, 10(1): 85-90. doi: 10.12153/j.issn.1674-991X.20190036
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Impacts of vermicompost on degradation of municipal sludge

doi: 10.12153/j.issn.1674-991X.20190036
  • 1.

    School of Environmental and Municipal Engineering, Lanzhou Jiaotong University

  • 2.

    Lanzhou Xingrong Environment Development Co., Ltd.

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  • Corresponding author: Xuemin CHEN E-mail: 851194457@qq.com
  • Received Date: 2019-03-11
  • Publish Date: 2020-01-20
    Abstract
  • In order to accelerate the stabilization process of municipal sludge, the effect of vermicompost on the sludge degradation process was studied. Sludge and vermicompost were mixed with mass ration of 2:1 as the treatment group (WF), and the sludge without vermicompost was used as the control group (W). The comparison tests were conducted at (20±1)℃ for a total of 50 days. The results showed that the concentration of organic matter (OM) in the treatment group with vermicompost (WF) was 4.2% lower, the electrical conductivity (EC) and the content of N H 4 + -N were elevated by 79.0% and 110.0%, respectively, and the content of N O 3 - -N was declined by 83.5%. The varied range of pH value in the treatment group was lower than that in the control group during the whole experimental process. The results showed that vermicompost could promote sludge ammoniation and stabilize the pH value. Moreover, the inoculation of vermicompost could reach the purposes of a higher degree of organic matter decomposition and a faster rate of mineralization, which contributed to the rapid stabilization of municipal sludge. Vermicompost can be used as an additive to accelerate municipal sludge degradation.

     

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