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Journal of Chemistry Volume 2018 ,2018-10-10
Leachate Recirculation for Enhancing Methane Generation within Field Site in China
Research Article
Lei Liu 1 , 2 , 3 Huan Xiong 2 Jun Ma 1 , 4 Sai Ge 1 , 3 Xiao Yu 5 Gang Zeng 6
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DOI:10.1155/2018/9056561
Received 2018-03-23, accepted for publication 2018-08-12, Published 2018-08-12
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摘要

Leachate recirculation is a critical element in the evaluation of the availability of methane production enhancement in bioreactor landfills. Field experiments in leachate injection were conducted in horizontal wells at a landfill in Hubei Province in China. The experiments included the long-term test of methane concentration and production in three cells; the test was operated with nonrecirculation (NR), continued recirculation (CR), and descending recirculation (DR). The average methane concentration in CR is 54.8%, which is higher than that in the NR and DR sites. The average biogas flow rate in the CR site was 2.2 times that in the NR site. The recirculation loading should be determined with the specific conditions, to effectively improve the methane production in field site. The position of the gas collection well was also very important, coordinating with the distribution of the leachate injection well and influence area of the liquid injection. The long-term monitoring of injection volume and gas production is essential to determine the reliability of recirculation for methane reuse.

授权许可

Copyright © 2018 Lei Liu et al. 2018
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

图表

Design of the horizontal and vertical well within landfill.

The distribution of the methane concentration and biogas flow rate in cell 1.

The distribution of the methane concentration and biogas flow rate in cell 2.

The distribution of the methane concentration and biogas flow rate in cell 3.

The distribution of the leachate injection volume and COD in cell 2.

The distribution of the leachate injection volume and COD in cell 3.

The variation of the pH in three cells.

The variation of the COD in three cells.

The BOD/COD ratio in leachate from cell 1.

The BOD/COD ratio in leachate from cell 2.

The BOD/COD ratio in leachate from cell 3.

通讯作者

Lei Liu.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China, cas.cn;School of Architecture & Civil Engineering, Shenyang University of Technology, Shenyang 110870, China, sut.edu.cn;Hubei Key Laboratory of Contaminated Clay Science & Engineering, Wuhan 430071, China.lliu@whrsm.ac.cn

推荐引用方式

Lei Liu,Huan Xiong,Jun Ma,Sai Ge,Xiao Yu,Gang Zeng. Leachate Recirculation for Enhancing Methane Generation within Field Site in China. Journal of Chemistry ,Vol.2018(2018)

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