Anaerobic co-digestion of yard waste, food waste, and pig slurry in a batch experiment: An investigation on methane potential, performance, and microbial community

Pongsopon, Mattana; Woraruthai, Thamonwan; Anuwan, Piyanuch; Amawatjana, Thanyaphat; Tirapanampai, Charndanai; Prombun, Photchanathorn; Kusonmano, Kanthida; Weeranoppanant, Nopphon; Chaiyen, Pimchai; Wongnate, Thanyaporn

doi:10.1016/j.biteb.2023.101364

Cited by 5 publications

(2 citation statements)

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“…In the second week, significant differences were found with respect to the control, probably due to the fact that the bacterial formulations present in the additive reduce the anaerobic habitat present in pig slurry. This is because they promote the digestion of organic sludge, with a consequent inhibition of the anaerobic bacteria that carry out methanogenesis [46,47]. However, during the third week, there was a significant increase in CH 4 emissions in the pond with biological additives compared to the control pond.…”

Section: Methane (Ch 4 ) Emissionsmentioning

confidence: 99%

“…From the fourth week, there was a tendency towards reduced methane emissions in the pond with additives; once the temperature stabilized, the processes of the digestion of organic sludge and inhibition of methanogenesis due to the reduction in anaerobic bacteria began again [46,47]. Additionally, a pH below 5.5 or above 8 could reduce the gene abundance or activity of most enzymes involved in methanogenesis, such as acetate kinase, formylmethanofuran dehydrogenase, and tetrahydromethanopterin S-methyltransferase [49].…”

Section: Methane (Ch 4 ) Emissionsmentioning

confidence: 99%

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Mitigating Ammonia, Methane, and Carbon Dioxide Emissions from Stored Pig Slurry Using Chemical and Biological Additives

El bied,

Turbí,

García-Valero

et al. 2023

Water

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This study addresses the challenge of mitigating ammonia and greenhouse gas (GHG) emissions from stored pig slurry using chemical and biological additives. The research employs dynamic chambers to evaluate the effectiveness of these additives. Chemical agents (sulfuric acid) and biological additives (DAB bacteria) containing specific microbial strains are tested (a mixture of Rhodopseudomonas palustris, Bacillus subtilis, Bacillus amyloliquefaciens, Bacillus licheniformis, Nitrosomona europea, Nictobacter winogradaskyi, and nutritional substrate). Controlled experiments simulate storage conditions and measure emissions of ammonia, methane, and carbon dioxide. Through statistical analysis of the results, this study evaluates the additives’ impact on emission reduction. Sulfuric acid demonstrated a reduction of 92% in CH4, 99% in CO2, and 99% in NH3 emissions. In contrast, the biological additives showed a lesser impact on CH4, with an 8% reduction, but more substantial reductions of 71% for CO2 and 77% for NH3.These results shed light on the feasibility of employing these additives to mitigate environmental impacts in pig slurry management and contribute to sustainable livestock practices by proposing strategies to reduce the ecological consequences of intensive animal farming.

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Section: Methane (Ch 4 ) Emissionsmentioning

confidence: 99%