Reducing Methane, Carbon Dioxide, and Ammonia Emissions from Stored Pig Slurry Using Bacillus-Biological Additives and Aeration

• Published in: Environments (Basel, Switzerland) Switzerland), 2024-08, Vol.11 (8), p.171
• Main Authors: El bied, Oumaima, Turbí, Martire Angélica Terrero, Garrido, Melisa Gómez, Cano, Ángel Faz, Acosta, José Alberto
• Format: Article
• Language: English
• Subjects: Acidification; Additives; Aeration; aerobic treatment; Agricultural runoff; Agricultural wastes; Air quality management; Alternative energy sources; Ammonia; ammonia emissions; Animal wastes; Bacillus; Bacteria; Biogas; biological additives; By-products; Carbon dioxide; Carbon dioxide emissions; Circular economy; Climate change; Contamination; Denitrification; dynamic chamber; Effectiveness; Emissions; Emissions control; Environmental aspects; Environmental conditions; Environmental impact; Eutrophication; Farm buildings; Farms; Fertilizers; Greenhouse gases; Industrial plant emissions; Livestock; Livestock farms; Livestock industry; Manures; Methane; Microorganisms; Mixtures; Nitrogen dioxide; Nutrients; Outdoor air quality; Pathogens; Phosphorus; Pig manure; pig slurry; Slurries; Statistical analysis; Storage conditions; Sustainable agriculture; Swine; Waste management
• ISSN: 2076-3298; 2076-3298
• DOI: 10.3390/environments11080171

This study delves into the innovative application of a novel bacterial and enzyme mixture alone or combined with aeration in mitigating emissions from pig slurry storage and explores their impacts on the methane (CH4), carbon dioxide (CO2), and ammonia (NH3) emissions from stored pig slurry. A dynamic chamber was used in this research to assess the efficacy of the treatments. Biological additives (HIPO-PURÍN) of specific microbial strains were tested (a mixture ofof Bacillus subtilis, Bacillus megaterium, Bacillus licheniformis, Bacillus amyloliquefacien, and Bacillus thuringiensis) alone and combined with an aeration system (OXI-FUCH). Controlled experiments simulated storage conditions, where emissions of ammonia, methane, and carbon dioxide were measured. By analyzing the results statistically, the treatment with HIPO-PURÍN demonstrated a significant reduction in CH4 emissions by 67% and CO2 emissions by 60% with the use of biological additives, which was increased to 99% and 87%, respectively, when combined with OXI-FUCH aeration, compared to untreated slurry. Ammonia emissions were substantially reduced by 90% with biological additives alone and by 76% when combined with aeration. The study was driven by the need to develop sustainable solutions for livestock waste management, particularly in reducing emissions from pig slurry. It introduces techniques that significantly lower greenhouse gases, aligning with circular economy goals and setting a new standard for sustainable agriculture. Furthermore, there is a need to validate that farmers can independently manage pig slurry using simple and effective treatments techniques with profound environmental benefits, encouraging broader adoption of climate-conscious practices.