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Treatment of leachate from domestic landfills with three-stage physicochemical and biochemical technology

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Abstract

Because domestic landfill leachate concentrates complex organic pollutants, effective treatment of landfill leachate has gained increasing attention in recent years. In this paper, three-stage physicochemical and biochemical technology for treatment of domestic landfill leachate is presented. Based on an eight-month pilot operation, over 96% of the main pollutants, for example CODCr, BOD5, SS, NH4 +–N, coliform, and chrominance, can be removed, among which the removal efficiency of CODCr was 89.5, 8.6, and 1.7% in stages 1, 2, and 3, respectively, and the removal efficiency of BOD5 was 90.3, 8.3, and 1.4%. In the treatment, the biochemical process played a principal role on the removal of pollutants from the leachate. The treatment efficiency depends on how the syntheses of physicochemical, anaerobic, and hydrolytic procedures pave the way for biochemical treatment. Application of a combined efflux and mixed-flow aerator enhanced the removal efficiency during each procedure.

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Authors and Affiliations

  1. Institute of Environment and Biogeochemistry, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, People’s Republic of China

    Huan-Xin Weng, Feng Zhang, Yang-Ming Zhu, Ya-Chao Qin & Zhong-qiang Ji

  2. California Regional Water Quality Control Board San Diego Region, 9174 Sky Park Court, Suite 100, San Diego, CA, 92123-4340, USA

    Charles Cheng

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  1. Huan-Xin Weng
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  2. Feng Zhang
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  3. Yang-Ming Zhu
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  4. Ya-Chao Qin
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  5. Zhong-qiang Ji
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  6. Charles Cheng
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Correspondence to Huan-Xin Weng.

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Weng, HX., Zhang, F., Zhu, YM. et al. Treatment of leachate from domestic landfills with three-stage physicochemical and biochemical technology. Environ Earth Sci 64, 1675–1681 (2011). https://doi.org/10.1007/s12665-010-0677-1

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  • DOI: https://doi.org/10.1007/s12665-010-0677-1

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