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Optimizing NH3 mitigation in poultry litter: Enhanced performance through pelletisation of oxychar
Bowen Li1, Xiangyu Li1, Kimberley Tilbrook2
1Key Laboratory for Farmland Eco-environment of Hebei Province, Hebei Collaborative Innovation Center for Green and Efficient Vegetable Industry, College of Resources and Environmental Science, Hebei Agricultural University, Baoding, 071000, PR China.
Chemosphere
|March 1, 2025
Summary
Pelletized oxychar (OC) significantly reduces ammonia (NH3) emissions from poultry litter (PL). This study shows pelletized OC offers improved handling and a 77.6% reduction in NH3 volatilization.
Area of Science:
- Agricultural Science
- Environmental Science
- Materials Science
Background:
- Poultry litter (PL) is a major source of ammonia (NH3) emissions, impacting health and the environment.
- Powdered oxychar (OC) shows potential for NH3 mitigation but faces handling challenges.
Purpose of the Study:
- To investigate the efficacy of pelletized OC for reducing NH3 volatilization from PL.
- To assess the physical and chemical improvements of pelletized OC compared to powdered OC.
Main Methods:
- High-pressure compression was used to produce OC pellets from agricultural waste.
- Comparative analysis of pelletized vs. powdered OC for dust content, self-heating, bulk density, and NH3 uptake.
- Assessment of NH3 volatilization reduction when 5% w/w OC pellets were incorporated into PL.
Main Results:
- Pelletized OC demonstrated significantly reduced dust (PM2.5 and PM10), lower self-heating risk, and enhanced bulk density.
- NH3 uptake by pelletized OC increased by 393.6% (volumetric basis) compared to powdered OC.
- Incorporation of 5% w/w OC pellets into PL reduced NH3 volatilization by 77.6% through amine and amide bond formation.
Conclusions:
- High-pressure compression is an effective method for producing practical OC pellets for NH3 mitigation.
- Pelletized OC offers environmental benefits and improved handling for reducing ammonia emissions in the poultry industry.
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