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Pretreatment of Slaughterhouse Effluent Treatment Plant Sludge Using Electro-Fenton Process for Anaerobic Digestion

Author

Listed:
  • Mohd Imran Siddiqui

    (Department of Civil Engineering, Zakir Husain College of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India)

  • Izharul Haq Farooqi

    (Department of Civil Engineering, Zakir Husain College of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India)

  • Farrukh Basheer

    (Department of Civil Engineering, Zakir Husain College of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India)

  • Hasan Rameez

    (Department of Civil Engineering, Zakir Husain College of Engineering and Technology, Aligarh Muslim University, Aligarh 202002, India)

  • Mohamed Hasnain Isa

    (Civil Engineering Programme, Faculty of Engineering, Universiti Teknologi Brunei, Tungku Highway, Gadong BE1410, Brunei)

Abstract

Sludge management is an integral process of an effluent treatment plant (ETP). This study aimed at using the electro-Fenton (EF) process for pretreatment of a cattle-based slaughterhouse ETP sludge to enhance biogas production from anaerobic digestion. EF-oxidation experiments were conducted in 0.5 L beakers with mild-steel electrodes, to study the effect of factors, viz., H 2 O 2 concentration, current density and reaction time on soluble chemical oxygen demand (sCOD) concentration, soluble extracellular polymeric substances (sEPS) concentration and volatile suspended solids (VSS) removal efficiency. This was followed by the quantification of biogas production from the raw and pretreated sludge in anaerobic digestion (AD). Experimental conditions for the EF process were optimized using response surface methodology (RSM). At optimized experimental conditions, EF pretreatment resulted in an increase in sCOD and sEPS concentrations, from 0.91 g/L to 6.1 g/L and 0.18 g/L to 1.4 g/L, respectively. VSS removal efficiency was 68.1%. Batch anaerobic digestion studies demonstrated an enhancement in the specific biogas yield, from 110 NmL/g-VS to 460 NmL/g-VS.

Suggested Citation

  • Mohd Imran Siddiqui & Izharul Haq Farooqi & Farrukh Basheer & Hasan Rameez & Mohamed Hasnain Isa, 2023. "Pretreatment of Slaughterhouse Effluent Treatment Plant Sludge Using Electro-Fenton Process for Anaerobic Digestion," Sustainability, MDPI, vol. 15(4), pages 1-19, February.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:4:p:3159-:d:1062869
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    References listed on IDEAS

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    1. Iwona Zawieja & Małgorzata Worwąg, 2021. "Biogas Production from Excess Sludge Oxidized with Peracetic Acid (PAA)," Energies, MDPI, vol. 14(12), pages 1-17, June.
    2. Zhen, Guangyin & Lu, Xueqin & Kato, Hiroyuki & Zhao, Youcai & Li, Yu-You, 2017. "Overview of pretreatment strategies for enhancing sewage sludge disintegration and subsequent anaerobic digestion: Current advances, full-scale application and future perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 69(C), pages 559-577.
    3. Jeong-Yoon Ahn & Soon-Woong Chang, 2021. "Effects of Sludge Concentration and Disintegration/Solubilization Pretreatment Methods on Increasing Anaerobic Biodegradation Efficiency and Biogas Production," Sustainability, MDPI, vol. 13(22), pages 1-13, November.
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