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Optimizing Anaerobic Acidogenesis: Synergistic Effects of Thermal Pretreatment of Composting, Oxygen Regulation, and Additive Supplementation

Author

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  • Dongmei Jiang

    (Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
    These authors contributed equally to this article.)

  • Yalin Wang

    (Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
    These authors contributed equally to this article.)

  • Zhenzhen Guo

    (Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China)

  • Xiaoxia Hao

    (Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China)

  • Hanyu Yu

    (Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China)

  • Lin Bai

    (Laboratory of Animal Ecology and Environmental Control, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, China)

Abstract

Anaerobic acidogenic fermentation presents a promising approach for sustainable carbon emission mitigation in livestock waste management, addressing critical environmental challenges in agriculture. This study systematically investigated the synergistic effects of composting-assisted pretreatment coupled with micro-aeration and methanogenesis suppression to enhance volatile fatty acid (VFA) production from swine manure supplemented with wheat straw, valorizing agricultural waste while reducing greenhouse gas emissions. The experimental protocol involved sequential optimization of pretreatment conditions (12 h composting followed by 10 min thermal pretreatment at 85 °C), operational parameters (300 mL micro-aeration and 30 mmol/L 2-bromoethanesulfonate (BES) supplementation), and their synergistic integration. The combined strategy achieved peak VFA production (5895.92 mg/L, p < 0.05), with butyric acid constituting the dominant fraction (2004.42 mg/L, p < 0.05). Enzymatic analysis demonstrated significantly higher activities of key hydrolytic enzymes (protease, α-glucosidase) and acidogenic enzymes (butyrate kinase, acetate kinase) in the synergistic treatment group compared to individual BES-supplemented or micro-aeration-only groups ( p < 0.05). This integrated approach provides a technically feasible and environmentally sustainable pathway for circular resource recovery, contributing to low-carbon agriculture and waste-to-value conversion.

Suggested Citation

  • Dongmei Jiang & Yalin Wang & Zhenzhen Guo & Xiaoxia Hao & Hanyu Yu & Lin Bai, 2025. "Optimizing Anaerobic Acidogenesis: Synergistic Effects of Thermal Pretreatment of Composting, Oxygen Regulation, and Additive Supplementation," Sustainability, MDPI, vol. 17(14), pages 1-15, July.
    • Handle: RePEc:gam:jsusta:v:17:y:2025:i:14:p:6494-:d:1702506
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    References listed on IDEAS

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    1. Yao, Yao & Huang, Gordon & An, Chunjiang & Chen, Xiujuan & Zhang, Peng & Xin, Xiaying & Jian Shen, & Agnew, Joy, 2020. "Anaerobic digestion of livestock manure in cold regions: Technological advancements and global impacts," Renewable and Sustainable Energy Reviews, Elsevier, vol. 119(C).
    2. Wang, Hui & Zeng, Shufang & Pan, Xiaoli & Liu, Lei & Chen, Yunjie & Tang, Jiawei & Luo, Feng, 2022. "Bioelectrochemically assisting anaerobic digestion enhanced methane production under low-temperature," Renewable Energy, Elsevier, vol. 194(C), pages 1071-1083.
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