Combining biochar, zeolite and wood vinegar for composting of pig manure: The effect on greenhouse gas emission and nitrogen conservation
The research paper investigates the effects of combining biochar (B), zeolite (Z), and wood vinegar (WV) in the composting process of pig manure (PM) to assess their impact on greenhouse gas (GHG) emissions and nitrogen conservation. Conducted in a 130 L reactor, the study involved six treatments of PM mixed with wheat straw (WS) in a 2:1 ratio, including a control group and various combinations of B, Z, and WV at different concentrations. The composting process lasted for 50 days, during which the researchers monitored GHG emissions (CO2, CH4, N2O) and ammonia (NH3) emissions.
The results indicated that the combination of B, Z, and WV significantly improved compost maturity and reduced GHG emissions. Specifically, the addition of WV with B and Z led to a reduction in ammonia loss by 64.45–74.32% and a decrease in CO2, CH4, and N2O emissions by 33.90–46.98%, 50.39–61.15%, and 79.51–81.10%, respectively. The treatment with 10% B, 10% Z, and 2% WV exhibited the lowest carbon (9.16%) and nitrogen (0.75%) losses, suggesting it as the most effective combination for composting PM.
The study highlights the importance of managing PM effectively, especially in regions with intensive pig farming, where PM management is a significant environmental concern. The findings contribute to the ongoing discussions on sustainable waste management practices by demonstrating that the right combination of additives can enhance composting efficiency while mitigating environmental impacts.
This research paper is significant in the field of waste management and environmental science, particularly concerning agricultural waste. It addresses the pressing issue of PM management, which is crucial for reducing environmental pollution and enhancing soil fertility. The study contributes to ongoing discussions about sustainable agricultural practices by providing empirical evidence on how specific additives can improve composting processes. The findings offer practical benefits to farmers and waste management professionals by suggesting effective strategies for reducing GHG emissions and nitrogen loss during composting, thus promoting more sustainable agricultural practices.
