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Toxicity Evaluation of Pig Slurry Using Luminescent Bacteria and Zebrafish

Author

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  • Wenyan Chen

    (School of Environmental and Safety Engineering, Changzhou University, No. 1 GeHu Road, Wu Jin District, Changzhou 213164, Jiangsu,China
    Yangtze Delta Region Institute of Tsinghua University, No. 705, Yatai Road, Nanhu District, Jiaxing 314006, Zhejiang, China)

  • Qiang Cai

    (Yangtze Delta Region Institute of Tsinghua University, No. 705, Yatai Road, Nanhu District, Jiaxing 314006, Zhejiang, China
    Water Science and Technology Lab, No. 705, Yatai Road, Nanhu District, Jiaxing 314006, Zhejiang, China)

  • Yuan Zhao

    (School of Environmental and Safety Engineering, Changzhou University, No. 1 GeHu Road, Wu Jin District, Changzhou 213164, Jiangsu,China)

  • Guojuan Zheng

    (Yangtze Delta Region Institute of Tsinghua University, No. 705, Yatai Road, Nanhu District, Jiaxing 314006, Zhejiang, China)

  • Yuting Liang

    (Institute of Soil Science, Chinese Academy of Science, No. 71, Beijing East Road, Nanjing 210008, Jiangsu, China)

Abstract

Biogas slurry has become a serious pollution problem and anaerobic digestion is widely applied to pig manure treatment for environmental protection and energy recovery. To evaluate environmental risk of the emission of biogas slurry, luminescent bacteria ( Vibrio fischeri ), larvae and embryos of zebrafish ( Danio rerio ) were used to detect the acute and development toxicity of digested and post-treated slurry. Then the ability of treatment process was evaluated. The results showed that digested slurry displayed strong toxicity to both zebrafish and luminescent bacteria, while the EC 50 for luminescent bacteria and the LC 50 for larvae were only 6.81% ( v/v ) and 1.95% ( v/v ) respectively, and embryonic development was inhibited at just 1% ( v/v ). Slurry still maintained a high level of toxicity although it had been treated by membrane bioreactor (MBR), while the LC 50 of larvae was 75.23% ( v/v ) and there was a little effect on the development of embryos and V . fischeri ; the results also revealed that the zebrafish larvae are more sensitive than embryos and luminescent bacteria to pig slurry. Finally, we also found the toxicity removal rate was higher than 90% after the treatment of MBR according to toxicity tests. In conclusion, further treatment should be used in pig slurry disposal or reused of final effluent.

Suggested Citation

  • Wenyan Chen & Qiang Cai & Yuan Zhao & Guojuan Zheng & Yuting Liang, 2014. "Toxicity Evaluation of Pig Slurry Using Luminescent Bacteria and Zebrafish," IJERPH, MDPI, vol. 11(7), pages 1-15, July.
    • Handle: RePEc:gam:jijerp:v:11:y:2014:i:7:p:6856-6870:d:37785
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    References listed on IDEAS

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