Pig barns ammonia and greenhouse gas emission mitigation by slurry aeration and acid scrubber

Monitoring the Dynamics in Nitrogen and Phosphorus Contents during Aerobic Digestion of Swine Slurry

“…Additionally, Bicudo and Svoboda [30] indicated that a significant portion of N (approximately 10.5%) was denitrified by the end of intermittent aerobic digestion, which may also account for the observed losses in both TN and NH 4 + -N. In a comparison of N fractions in FSS and MSS, the dominant N fraction was NH 4 + by 73.4% in FSS while NO 3 − was dominant in MSS by 65.7%. The observed loss in TN and NH 4 + -N was a result of gaseous emissions under alkaline pH and aeration over three digestion processes, especially NH 3 and N 2 O, as reported by Calvet et al [42] and Mostafa et al [43,44], but also by the mineralization of the latter to NO 3 − . The studies on aeration that consider the fate of N in SS revealed that continuous or intermittent aeration achieves high nitrogen removal as emissions of NH 3 , N 2 O, and N 2 [42].…”

An overview of the interactions between food production and climate change

“…This study confirmed that the use of chicken manure biochar and chicken manure-integrated microbial consortium reduced the emission of nitrous oxide and methane. Mostafa et al (2020) showed that using slurry aeration as an approach to reduce gaseous emissions from pig manure reduced gas emissions of nitrous oxide and ammonia by over 10 %, and methane by over 50 %. Im et al (2020) confirmed the potential of lowering the temperature of cattle manure as a catalyst to reducing the level of methane emissions.…”

Improvement of human health and environmental costs in the European Union by air scrubbers in intensive pig farming

“…Therefore, in our vision, its implementation should be increasingly encouraged by EU and/or national policies, especially in countries other than northcontinental ones, where its use is currently uncommon. (Mostafa et al, 2020); -The water discharged contains high nitrogen concentration (3-9% according to Sigurnjak et al, 2019) and can be used as fertilizer with good agronomic performances (Martin et al, 2018); -Currently represents the most suitable air cleaning technology in economic (Santonja et al, 2017) and environmental (De Vries & Melse, 2017) terms. Confirming the latter, the WAS does not promote N2O formation, which instead occurs for bioscrubbers as side effect of the NH3 abatement reaction, causing an environmental trade-off with climate change (Dumont, 2018); -Can be designed for specific target substances according to the needs; can be combined with other technologies to form multi-stage scrubbers (Van der Heyden et al, 2015).…”