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Relationships among Physicochemical, Microbiological, and Parasitological Parameters, Ecotoxicity, and Biochemical Methane Potential of Pig Slurry

Author

Listed:
  • María Eugenia Beily

    (Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Hurlingham 1686, Argentina)

  • Brian Jonathan Young

    (Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Hurlingham 1686, Argentina)

  • Patricia Alina Bres

    (Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Hurlingham 1686, Argentina)

  • Nicolás Iván Riera

    (Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Hurlingham 1686, Argentina)

  • Wenguo Wang

    (Key Laboratory of Development and Application of Rural Renewable Energy, Biogas Institute of Ministry of Agriculture and Rural Affairs, Chengdu 610041, China)

  • Diana Elvira Crespo

    (Instituto Nacional de Tecnología Agropecuaria (INTA), Instituto de Microbiología y Zoología Agrícola (IMyZA), Hurlingham 1686, Argentina)

  • Dimitrios Komilis

    (Department of Environmental Engineering, Democritus University of Thrace, 67100 Xanthi, Greece)

Abstract

Background: Pig slurry can negatively impact on the environmental, animal, and human health. Knowing the relationship between the organic and inorganic loads, pathogens, and toxicity allows identifying the main parameters to be removed or treated before final disposal. The aim of this study was to evaluate the relationships between the physicochemical properties, microbiological, and parasitological content, ecotoxicological effects, and biochemical methane potential (BMP) of pig slurries. Methods: Ten pig slurry samples at two production stages were characterized and a BMP test at two substrate/inoculum (S/I) ratios was conducted to compare the methane yields. Results: We found high content of Cu, Zn, quaternary ammonium, pathogenic microorganisms ( E . coli and Salmonella ), and parasites ( Trichuris and Trichostrongylus) . Toxicity on lettuce, radish, and Daphnia was observed with a slurry concentration greater than 1.35%. Positive correlations were found between toxicity on Daphnia and chemical oxygen demand (COD), sulfate, Zn, and Cu, as well as between phytotoxicity and COD, NH 4 , Na, K, and conductivity. The lowest S/I ratio showed 13% more methane yield. It was associated with high removals of COD and volatile fatty acids. Conclusions: We recommend using a low S/I ratio to treat pig slurry as it improves the efficiency of the anaerobic process.

Suggested Citation

  • María Eugenia Beily & Brian Jonathan Young & Patricia Alina Bres & Nicolás Iván Riera & Wenguo Wang & Diana Elvira Crespo & Dimitrios Komilis, 2023. "Relationships among Physicochemical, Microbiological, and Parasitological Parameters, Ecotoxicity, and Biochemical Methane Potential of Pig Slurry," Sustainability, MDPI, vol. 15(4), pages 1-16, February.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:4:p:3172-:d:1063063
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    References listed on IDEAS

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    1. Kafle, Gopi Krishna & Kim, Sang Hun, 2013. "Anaerobic treatment of apple waste with swine manure for biogas production: Batch and continuous operation," Applied Energy, Elsevier, vol. 103(C), pages 61-72.
    2. Niccolò Pampuro & Carlo Bisaglia & Elio Romano & Massimo Brambilla & Ester Foppa Pedretti & Eugenio Cavallo, 2017. "Phytotoxicity and Chemical Characterization of Compost Derived from Pig Slurry Solid Fraction for Organic Pellet Production," Agriculture, MDPI, vol. 7(11), pages 1-10, November.
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    Cited by:

    1. Tiago Miguel Cabrita & Maria Teresa Santos, 2023. "Biochemical Methane Potential Assays for Organic Wastes as an Anaerobic Digestion Feedstock," Sustainability, MDPI, vol. 15(15), pages 1-30, July.

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