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Effects of Sludge Concentration and Disintegration/Solubilization Pretreatment Methods on Increasing Anaerobic Biodegradation Efficiency and Biogas Production

Author

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  • Jeong-Yoon Ahn

    (Department of Environmental Energy Engineering, College of Creative Engineering, Kyonggi University, 94 San, Suwon-si 16227, Korea)

  • Soon-Woong Chang

    (Department of Environmental Energy Engineering, College of Creative Engineering, Kyonggi University, 94 San, Suwon-si 16227, Korea)

Abstract

It is urgent to determine suitable municipal sludge treatment solutions to simultaneously minimize the environmental negative impacts and achieve sustainable energy benefits. In this study, different sludge pretreatment techniques were applied and investigated to enhance the sludge solubility and, subsequently, facilitate the anaerobic biodegradation performance of the mixed sludge under different sludge concentrations and pretreatment techniques. The sludge characteristics before and after pretreatment and batch experiments of anaerobic digestion of sludge samples under different conditions were analyzed and discussed. The results showed that the mechanical pretreatment method, alone and in combination with low-temperature heat treatment, significantly improved the sludge solubility, with the highest solubility at 39.23%. The maximum biomethane yield achieved was 0.43 m 3 /kg after 10 d of anaerobic digestion of a 3% sludge sample subjected to mechanical and thermal pretreatment prior to anaerobic biodegradation. In comparison, it took more than 28 d to achieve the same biomethane production with the unpretreated sludge sample. Mechanical pretreatment and subsequent heat treatment showed a high ability to dissolve sludge and, subsequently, accelerate anaerobic digestion, thereby providing promising prospects for increasing the treatment capacity of existing and new sludge treatment plants.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:22:p:12887-:d:684466
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    References listed on IDEAS

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    Cited by:

    1. Joanna Kazimierowicz & Marcin Dębowski & Marcin Zieliński, 2023. "Technological, Ecological, and Energy-Economic Aspects of Using Solidified Carbon Dioxide for Aerobic Granular Sludge Pre-Treatment Prior to Anaerobic Digestion," IJERPH, MDPI, vol. 20(5), pages 1-21, February.
    2. Matevž Zupančič & Valerija Možic & Matic Može & Franc Cimerman & Iztok Golobič, 2022. "Current Status and Review of Waste-to-Biogas Conversion for Selected European Countries and Worldwide," Sustainability, MDPI, vol. 14(3), pages 1-25, February.
    3. Walczak, Justyna & Karolinczak, Beata & Zubrowska-Sudol, Monika, 2023. "Effect of co-digestion and hydrodynamic disintegration on the methane potential of sewage sludge and organic fraction of municipal solid waste with consideration of the carbon footprint," Energy, Elsevier, vol. 282(C).
    4. 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.
    5. Shashi Kant Bhatia, 2023. "Biorefinery for the Sustainable Biochemicals Production: Process Design and Technological Advances," Sustainability, MDPI, vol. 15(10), pages 1-3, May.

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