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Impact of Fe and Ni Addition on the VFAs’ Generation and Process Stability of Anaerobic Fermentation Containing Cd

Author

Listed:
  • Huayong Zhang

    (Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing 102206, China)

  • Yanli Xu

    (Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing 102206, China)

  • Yonglan Tian

    (Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing 102206, China)

  • Lei Zheng

    (Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing 102206, China)

  • He Hao

    (Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing 102206, China)

  • Hai Huang

    (Research Center for Engineering Ecology and Nonlinear Science, North China Electric Power University, Beijing 102206, China)

Abstract

The effects of Cd, Cd + Fe, and Cd + Ni on the thermophilic anaerobic fermentation of corn stover and cow manure were studied in pilot experiments by investigating the biogas properties, process stability, substrate biodegradation, and microbial properties. The results showed that the addition of Fe and Ni into the Cd-containing fermentation system induced higher cumulative biogas yields and NH 4 + –N concentrations compared with the only Cd-added group. Ni together with Cd improved and brought forward the peak daily biogas yields, and increased the CH 4 contents to 80.76%. Taking the whole fermentation process into consideration, the promoting impact of the Cd + Ni group was mainly attributed to better process stability, a higher average NH 4 + –N concentration, and increased utilization of acetate. Adding Fe into the Cd-containing fermentation system increased the absolute abundance of Methanobrevibacter on the 13th day, and Methanobrevibacter and Methanobacterium were found to be positively correlated with the daily biogas yield. This research was expected to provide a basis for the reuse of biological wastes contaminated by heavy metals and a reference for further studies on the influence of compound heavy metals on anaerobic fermentation.

Suggested Citation

  • Huayong Zhang & Yanli Xu & Yonglan Tian & Lei Zheng & He Hao & Hai Huang, 2019. "Impact of Fe and Ni Addition on the VFAs’ Generation and Process Stability of Anaerobic Fermentation Containing Cd," IJERPH, MDPI, vol. 16(21), pages 1-16, October.
    • Handle: RePEc:gam:jijerp:v:16:y:2019:i:21:p:4066-:d:279315
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    References listed on IDEAS

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    1. Yonglan Tian & Huayong Zhang & Lei Zheng & Shusen Li & He Hao & Hai Huang, 2019. "Effect of Zn Addition on the Cd-Containing Anaerobic Fermentation Process: Biodegradation and Microbial Communities," IJERPH, MDPI, vol. 16(16), pages 1-17, August.
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    Cited by:

    1. Kumar, Vikas & Kieft, Brandon & Devi, Parmila & Hallam, Steven J. & Eskicioglu, Cigdem, 2022. "Two-step activated carbon cloth enhances microbial interactions and methane production during anaerobic digestion of municipal sludge," Renewable Energy, Elsevier, vol. 196(C), pages 366-374.

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