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Enhanced Biogas Production of Cassava Wastewater Using Zeolite and Biochar Additives and Manure Co-Digestion

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  • Chibueze G. Achi

    (Department of Environmental Science & Technology, University of Maryland, College Park, MD 20742, USA
    Department of Civil Engineering, University of Ibadan, Ibadan 200284, Nigeria)

  • Amro Hassanein

    (Department of Environmental Science & Technology, University of Maryland, College Park, MD 20742, USA)

  • Stephanie Lansing

    (Department of Environmental Science & Technology, University of Maryland, College Park, MD 20742, USA)

Abstract

Currently, there are challenges with proper disposal of cassava processing wastewater, and a need for sustainable energy in the cassava industry. This study investigated the impact of co-digestion of cassava wastewater (CW) with livestock manure (poultry litter (PL) and dairy manure (DM)), and porous adsorbents (biochar (B-Char) and zeolite (ZEO)) on energy production and treatment efficiency. Batch anaerobic digestion experiments were conducted, with 16 treatments of CW combined with manure and/or porous adsorbents using triplicate reactors for 48 days. The results showed that CW combined with ZEO (3 g/g total solids (TS)) produced the highest cumulative CH 4 (653 mL CH 4 /g VS), while CW:PL (1:1) produced the most CH 4 on a mass basis (17.9 mL CH 4 /g substrate). The largest reduction in lag phase was observed in the mixture containing CW (1:1), PL (1:1), and B-Char (3 g/g TS), yielding 400 mL CH 4 /g volatile solids (VS) after 15 days of digestion, which was 84.8% of the total cumulative CH 4 from the 48-day trial. Co-digesting CW with ZEO, B-Char, or PL provided the necessary buffer needed for digestion of CW, which improved the process stability and resulted in a significant reduction in chemical oxygen demand (COD). Co-digestion could provide a sustainable strategy for treating and valorizing CW. Scale-up calculations showed that a CW input of 1000–2000 L/d co-digested with PL (1:1) could produce 9403 m 3 CH 4 /yr using a 50 m 3 digester, equivalent to 373,327 MJ/yr or 24.9 tons of firewood/year. This system would have a profit of $5642/yr and a $47,805 net present value.

Suggested Citation

  • Chibueze G. Achi & Amro Hassanein & Stephanie Lansing, 2020. "Enhanced Biogas Production of Cassava Wastewater Using Zeolite and Biochar Additives and Manure Co-Digestion," Energies, MDPI, vol. 13(2), pages 1-13, January.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:2:p:491-:d:310616
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    References listed on IDEAS

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    1. Hagos, Kiros & Zong, Jianpeng & Li, Dongxue & Liu, Chang & Lu, Xiaohua, 2017. "Anaerobic co-digestion process for biogas production: Progress, challenges and perspectives," Renewable and Sustainable Energy Reviews, Elsevier, vol. 76(C), pages 1485-1496.
    2. Roopnarain, Ashira & Adeleke, Rasheed, 2017. "Current status, hurdles and future prospects of biogas digestion technology in Africa," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 1162-1179.
    3. Jiraprasertwong, Achiraya & Maitriwong, Kiatchai & Chavadej, Sumaeth, 2019. "Production of biogas from cassava wastewater using a three-stage upflow anaerobic sludge blanket (UASB) reactor," Renewable Energy, Elsevier, vol. 130(C), pages 191-205.
    4. Paolo S. Calabrò & Filippo Fazzino & Adele Folino & Emilia Paone & Dimitrios Komilis, 2019. "Semi-Continuous Anaerobic Digestion of Orange Peel Waste: Effect of Activated Carbon Addition and Alkaline Pretreatment on the Process," Sustainability, MDPI, vol. 11(12), pages 1-11, June.
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    Cited by:

    1. Amro Hassanein & Freddy Witarsa & Stephanie Lansing & Ling Qiu & Yong Liang, 2020. "Bio-Electrochemical Enhancement of Hydrogen and Methane Production in a Combined Anaerobic Digester (AD) and Microbial Electrolysis Cell (MEC) from Dairy Manure," Sustainability, MDPI, vol. 12(20), pages 1-12, October.
    2. Joseph Yankyera Kusi & Florian Empl & Ralf Müller & Stefan Pelz & Jens Poetsch & Gregor Sailer & Rainer Kirchhof & Nana Sarfo Agyemang Derkyi & Francis Attiogbe, 2025. "An Evaluation of Biogas Potential of Cassava, Yam and Plantain Peel Mixtures Using Theoretical Models and Hohenheim Biogas Yield Test-Based Experiments," Energies, MDPI, vol. 18(4), pages 1-17, February.
    3. Joseph Yankyera Kusi & Florian Empl & Ralf Müller & Stefan Pelz & Jens Poetsch & Gregor Sailer & Rainer Kirchhof & Nana Sarfo Agyemang Derkyi & Francis Attiogbe & Sarah Elikplim Siabi, 2024. "Evaluation of Energetic Potential of Slaughterhouse Waste and Its Press Water Obtained by Pressure-Induced Separation via Anaerobic Digestion," Energies, MDPI, vol. 17(22), pages 1-20, November.
    4. Jessica Quintana-Najera & A. John Blacker & Louise A. Fletcher & Andrew B. Ross, 2023. "Understanding the Influence of Biochar Augmentation in Anaerobic Digestion by Principal Component Analysis," Energies, MDPI, vol. 16(6), pages 1-18, March.
    5. Cristian Bernabé Arenas Sevillano & Marco Chiappero & Xiomar Gomez & Silvia Fiore & E. Judith Martínez, 2020. "Improving the Anaerobic Digestion of Wine-Industry Liquid Wastes: Treatment by Electro-Oxidation and Use of Biochar as an Additive," Energies, MDPI, vol. 13(22), pages 1-17, November.

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