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Balancing phosphine in manure fermentation

F Eismann1, D Glindemann, A Bergmann

  • 1University of Leipzig, Institute for Animal Hygiene and Veterinary Public Affairs, Germany.

Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
|November 14, 1997
PubMed
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Phosphine gas in swine manure fermentation is mostly captured in solids, not released. Manure acts as a phosphine sink, with feed potentially being a primary source before treatment.

Area of Science:

  • Environmental Science
  • Agricultural Science
  • Biogeochemistry

Background:

  • Phosphine (PH3) is a gas of toxicological and environmental concern.
  • Understanding phosphine's fate during anaerobic digestion of swine manure is crucial for waste management.

Purpose of the Study:

  • To investigate phosphine gas evolution during anaerobic swine manure fermentation.
  • To correlate phosphine production with methane and hydrogen sulfide.
  • To determine phosphine's balance within the manure matrix.

Main Methods:

  • Anaerobic batch fermentation experiments with fresh swine manure.
  • Detection and quantification of phosphine, methane, and hydrogen sulfide.
  • Analysis of phosphine concentrations in biogas and solid manure constituents.

Related Experiment Videos

  • Seasonal monitoring in large-scale manure treatment plants.

    • Main Results:

    • A temporal link was observed between phosphine release and methane production.
    • Gaseous phosphine released is a small fraction; most is matrix-bound in solids.
    • Over 50% of matrix-bound phosphine was eliminated during fermentation.
    • Net phosphine loss occurred in both batch and large-scale fermentation.

    Conclusions:

    • Swine manure functions as a phosphine sink, not a primary source, during anaerobic digestion.
    • Phosphine residues in swine feed, potentially from grain fumigation, are a significant source.
    • This highlights the importance of feed management in phosphine levels in manure treatment.