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Performance and Energy Utilization Efficiency of an Expanded Granular Sludge Bed Reactor in the Treatment of Cassava Alcohol Wastewater

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  • Guoqin Xu

    (School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, China
    College of Biological and Agricultural Science, Honghe University, Mengzi 661100, China
    These authors contributed equally to this work.)

  • Junlin Ji

    (School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, China
    These authors contributed equally to this work.)

  • Zhanyao Zheng

    (Ningjin County Agriculture and Rural Bureau, Dezhou 253400, China)

  • Hongchuan Song

    (School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, China)

  • Hong Yang

    (School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, China)

  • Jing Liu

    (School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, China)

  • Fang Yin

    (School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, China)

  • Wudi Zhang

    (School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, China)

  • Shumei Hao

    (School of Energy and Environment Science, Yunnan Normal University, Kunming 650500, China)

Abstract

In recent years, expanded granular sludge blanket (EGSB) reactor has been widely used in the treatment of high-concentration organic wastewater, but its research mainly focused on treatment efficiency and microbial community composition. There were few studies on the relationship of operation conditions and energy utilization efficiency. Therefore, the methanogenic characteristics and energy utilization efficiency of EGSB reactor were studied by using cassava alcohol wastewater (CAW) as a raw material at (36 ± 1) °C. The results show that the degradation of volatile fatty acids (VFAs) is an important step affecting methane generation compared to the hydrolysis stage. When organic load rate (OLR) was 12.73 gCOD/L·d, the chemical oxygen demand (COD) removal rate was above 95%, the methane production efficiency of raw material was 202.73 mLCH 4 / gCOD·d, the four-stage conversion efficiency was the highest, and the energy utilization efficiency was 62.26%, which was the optimal stage for EGSB reactor to treat CAW. These findings support high-efficiency bioenergy recovery from CAW in practice and highlight the potential wide application of high-performance anaerobic reactors for CAW.

Suggested Citation

  • Guoqin Xu & Junlin Ji & Zhanyao Zheng & Hongchuan Song & Hong Yang & Jing Liu & Fang Yin & Wudi Zhang & Shumei Hao, 2023. "Performance and Energy Utilization Efficiency of an Expanded Granular Sludge Bed Reactor in the Treatment of Cassava Alcohol Wastewater," Energies, MDPI, vol. 16(22), pages 1-15, November.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:22:p:7496-:d:1276525
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    References listed on IDEAS

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    1. Jay N. Meegoda & Brian Li & Kush Patel & Lily B. Wang, 2018. "A Review of the Processes, Parameters, and Optimization of Anaerobic Digestion," IJERPH, MDPI, vol. 15(10), pages 1-16, October.
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