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Effects of Increasing Concentrations of Enrofloxacin on Co-Digestion of Pig Manure and Corn Straw

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  • Qihang Shu

    (Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China)

  • Hongkuan Cheng

    (Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China)

  • Xiaxia Chen

    (Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China)

  • Jie Wang

    (Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China)

  • Zunqing Du

    (Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China)

  • Jun Hong

    (Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China)

  • Zheng Zheng

    (Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China)

  • Xingzhang Luo

    (Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, China)

Abstract

Enrofloxacin (ENR) is one of the most commonly used antibiotics in pig farms. In this study, using fresh pig manure and corn straw powder as substrates, the effects of different concentrations of ENR (2.5, 10, and 20 mg/L) on anaerobic digestion in completely mixed anaerobic reactors were investigated. A relatively low concentration of ENR (2.5 mg/L) increased methane production by 47.58% compared with the control group. Among the volatile fatty acids (VFAs) in the reactors, the propionic acid content was the lowest, and the concentrations of acetic acid kinase and coenzyme F420 were highest in the first seven days during peak gas production. However, methane production in the reactors with 10 mg/L and 20 mg/L ENR decreased by 8.59% and 20.25%, respectively. Furthermore, the accelerated hydrolysis of extracellular polymeric substances causes a significant accumulation of VFA levels. The microbial community in anaerobic reactors was analyzed by 16S rRNA sequencing. Proteiniphilum was the dominant bacterial genus. In addition, ENR at 2.5 mg/L effectively increased the abundance and diversity of anaerobic microorganisms, whereas a high concentration of ENR (10 and 20 mg/L) significantly decreased these parameters. This study demonstrated that different concentrations of ENR had significantly different effects on anaerobic digestion.

Suggested Citation

  • Qihang Shu & Hongkuan Cheng & Xiaxia Chen & Jie Wang & Zunqing Du & Jun Hong & Zheng Zheng & Xingzhang Luo, 2022. "Effects of Increasing Concentrations of Enrofloxacin on Co-Digestion of Pig Manure and Corn Straw," Sustainability, MDPI, vol. 14(10), pages 1-14, May.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:10:p:5894-:d:814473
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    References listed on IDEAS

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    1. Izabela Koniuszewska & Monika Harnisz & Ewa Korzeniewska & Małgorzata Czatzkowska & Jan Paweł Jastrzębski & Łukasz Paukszto & Sylwia Bajkacz & Ewa Felis & Paulina Rusanowska, 2021. "The Effect of Antibiotics on Mesophilic Anaerobic Digestion Process of Cattle Manure," Energies, MDPI, vol. 14(4), pages 1-19, February.
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