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Optimization of up-flow velocity and feed flow rate in up-flow anaerobic sludge blanket fixed-film reactor on bio-hydrogen production from palm oil mill effluent

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  • Akhbari, Azam
  • Ibrahim, Shaliza
  • Ahmad, Muhammad Shakeel

Abstract

The present study aims to optimize key operational parameters of the up-flow anaerobic sludge blanket fixed-film (UASFF) reactor using response surface methodology (RSM). A central composite design (CCD) has been applied to accomplish thirteen experimental runs given two main variables, namely feed flow rate (Qf), and up-flow velocity (Vup). The maximum hydrogen content, hydrogen production rate (HPR), hydrogen yield (HY), and COD removal were achieved at 55%, 4800 mL H2/cycle, 321 mL H2/g-COD, and 24.33%, respectively at Qf 8 L/cycle (HRT = cycle = 10.5 h) and Vup 2.0 m/h. The performance of the parameters from the optimum identified area was assessed at Qf 5.5 L/cycle (HRT = 15.3 h), and Vup 1.8 m/h, resulted in a maximum hydrogen content, HY, and HPR of 72%, 340 mL H2/g-COD, and 5100 mL H2/cycle, respectively. At optimum conditions, Clostridium sensu stricto 1 was found to be the dominant hydrogen-producing bacteria in the system. The results of this study may provide a practical basis for developing a UASFF reactor prototype based on empirical data.

Suggested Citation

  • Akhbari, Azam & Ibrahim, Shaliza & Ahmad, Muhammad Shakeel, 2023. "Optimization of up-flow velocity and feed flow rate in up-flow anaerobic sludge blanket fixed-film reactor on bio-hydrogen production from palm oil mill effluent," Energy, Elsevier, vol. 266(C).
    • Handle: RePEc:eee:energy:v:266:y:2023:i:c:s0360544222033217
    DOI: 10.1016/j.energy.2022.126435
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    References listed on IDEAS

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    1. Abbasi, Tasneem & Abbasi, S.A., 2012. "Formation and impact of granules in fostering clean energy production and wastewater treatment in upflow anaerobic sludge blanket (UASB) reactors," Renewable and Sustainable Energy Reviews, Elsevier, vol. 16(3), pages 1696-1708.
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    Cited by:

    1. Wu, Zhihong & Guo, Zhigang & Yang, Jian & Wang, Qiuwang, 2023. "Numerical investigation of methane steam reforming in packed bed reactor with internal helical heat fins," Energy, Elsevier, vol. 278(PB).
    2. Akhbari, Azam & Ibrahim, Shaliza & Ahmad, Muhammad Shakeel, 2023. "Feasibility of semi-pilot scale up-flow anaerobic sludge blanket fixed-film reactor for fermentative bio-hydrogen production from palm oil mill effluent," Renewable Energy, Elsevier, vol. 212(C), pages 612-620.
    3. Zhang, Zexi & Ding, Ke & Ma, Xiaojun & Tang, Shuai & Wang, Zixin & Lu, Haifeng & Jiang, Weizhong & Si, Buchun, 2023. "Hydrodynamic design of down-flow packed bed reactor regulated the biohydrogen production and microbial enrichment," Energy, Elsevier, vol. 271(C).

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