通过将硫酸盐添加到液体乳制品便中来减少甲排放
Filipe Matos Pereira Lima1, Mélodie Laniel1, Hambaliou Balde1
1Agriculture and Agri-Food Canada, Ottawa, Ontario, Canada.
Journal of environmental quality
|February 17, 2025
概括
奶农可以使用低成本的硫酸盐添加剂来减少便的甲排放. 石膏 (硫酸) 和硫酸显示有望显著抑制甲,提供替代昂贵的消化器.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 动物科学动物科学
背景情况:
- 奶牛养殖旨在减少其碳足迹,而便中的甲 (CH4) 是一个重要的来源.
- 目前的甲减排技术,如无氧消化器,由于成本和基础设施,面临采用障碍.
- 为了短期减少甲排放,需要低成本,易于采用的替代方案.
研究的目的:
- 评估不同基于硫酸盐的添加剂和酸化策略的有效性,以抑制乳制品便的甲排放.
- 为了比较硫酸 (H2SO4),酸 (H3PO4) 和硫酸 (CaSO4) 在减少肥甲中的有效性.
主要方法:
- 在24°C的157天实验室研究中,对比了CaSO4,H2SO4和H3PO4对便甲排放的影响.
- 对H2SO4和H3PO4进行了测试,测试了CaSO4的不同速率和两个酸化水平 (pH>7和pH<7).
- 随着时间的推移,监测累积的甲 (CH4) 排放,以评估抑制的有效性.
主要成果:
- 使用H2SO4和H3PO4的酸化显示出早期的甲抑制 (分别在40天内达到65%和54%).
- 硫酸盐化合物在50天后表现出抑制增加,最终累积抑制高达CaSO4的63%和H2SO4.4的91%.
- H2SO4是最有效的,可能是由于酸度和硫酸盐含量相结合;CaSO4比H3PO4.4更有效.
结论:
- 硫酸盐基添加剂,特别是石膏 (CaSO4),显示出减少乳制品便甲排放的巨大潜力.
- 这些添加剂提供了一个有希望的,低成本的,易于采用的替代无氧消化器,用于近期的甲减少.
- 对硫酸盐添加剂的进一步研究可以为奶牛场提供可扩展的解决方案,以减轻温室气体排放.
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