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Impact of Organic Load on Methane Yields and Kinetics during Anaerobic Digestion of Sugarcane Bagasse: Optimal Feed-to-Inoculum Ratio and Total Solids of Reactor Working Volume

Author

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  • Amal Babu Puthumana

    (School of Engineering and Built Environment, Nathan Campus, Griffith University, Brisbane, QLD 4111, Australia)

  • Prasad Kaparaju

    (School of Engineering and Built Environment, Nathan Campus, Griffith University, Brisbane, QLD 4111, Australia)

Abstract

The effect of increasing organic load on the specific methane yields (SMYs) and kinetics of methane production during the anaerobic digestion (AD) of sugarcane bagasse (SB) was investigated in batch experiments at 37 °C. The organic load of the batch AD system was increased based on an increase in the feed-to-inoculum (F/I) ratio (T1–T5) and increase in the Total Solids (TS)% of the working volume (T6–T10). The results show that in both the treatment sets, an increase in organic load led to a decrease in SMY. Higher organic loads in terms of F/I ratio (T4 and T5) were inhibited due to Volatile Fatty Acid (VFA) accumulation. On the other hand, higher organic loads (T8, T9 and T10) in terms of the higher TS% of the working volume was inhibited by the accumulation of NH 4 -N. Thus, an organic load of 50 gVS/L at an F/I ratio = 1.0 and TS = 10% (T3) was found to be the highest organic load that had no significant inhibitions among the tested treatments. The results from the kinetic studies show that the first-order kinetic model is the best fit for the SMY data, with average differences% of 2.32% and 3.13% for treatments T1–T5 and T6–T10, respectively.

Suggested Citation

  • Amal Babu Puthumana & Prasad Kaparaju, 2024. "Impact of Organic Load on Methane Yields and Kinetics during Anaerobic Digestion of Sugarcane Bagasse: Optimal Feed-to-Inoculum Ratio and Total Solids of Reactor Working Volume," Energies, MDPI, vol. 17(20), pages 1-18, October.
    • Handle: RePEc:gam:jeners:v:17:y:2024:i:20:p:5083-:d:1497502
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    References listed on IDEAS

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    1. Spyridon Achinas & Yu Li & Vasileios Achinas & Gerrit Jan Willem Euverink, 2019. "Biogas Potential from the Anaerobic Digestion of Potato Peels: Process Performance and Kinetics Evaluation," Energies, MDPI, vol. 12(12), pages 1-16, June.
    2. Kaparaju, Prasad & Rintala, Jukka, 2005. "Anaerobic co-digestion of potato tuber and its industrial by-products with pig manure," Resources, Conservation & Recycling, Elsevier, vol. 43(2), pages 175-188.
    3. Shubham Dilip Sarode & Deepak Kumar & Divya Mathias & David McNeill & Prasad Kaparaju, 2023. "Anaerobic Digestion of Spoiled Maize, Lucerne and Barley Silage Mixture with and without Cow Manure: Methane Yields and Kinetic Studies," Energies, MDPI, vol. 16(17), pages 1-20, August.
    4. Aakash Khadka & Anmol Parajuli & Sheila Dangol & Bijay Thapa & Lokesh Sapkota & Alessandro A. Carmona-Martínez & Anish Ghimire, 2022. "Effect of the Substrate to Inoculum Ratios on the Kinetics of Biogas Production during the Mesophilic Anaerobic Digestion of Food Waste," Energies, MDPI, vol. 15(3), pages 1-16, January.
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    6. Divya Joslin Mathias & Thiago Edwiges & Napong Ketsub & Rajinder Singh & Prasad Kaparaju, 2023. "Sweet Sorghum as a Potential Fallow Crop in Sugarcane Farming for Biomethane Production in Queensland, Australia," Energies, MDPI, vol. 16(18), pages 1-17, September.
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