Wang Yue, Guo He, Wang Shunli, Zhang Jianan, Zhu Zhiping, Li Xinrong, Dong Hongmin
Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences, Beijing 100087, China.
Urban Construction School, Beijing City University, Beijing 100083, China.
J Hazard Mater. 2021 Feb 5;403:123954. doi: 10.1016/j.jhazmat.2020.123954. Epub 2020 Sep 13.
Animal slurry storage is an important source of NH emission which has raised a high attention regarding its influence on air quality and environment health. There is an urgent need to develop an efficient, green and safe technology for reducing NH emission. This study introduced a novel method of reducing NH emission from dairy slurry storage using HSO modified expanded vermiculite cover (HSO-VM1). Results showed that NH mitigation of 87% was achieved in the treatment of HSO-VM1 during 77 days of slurry storage, which could be mainly caused by conversion of free NH to NH in acidified slurry surface and vermiculite layer, the cover barrier for gases emissions, NH adsorption by vermiculite cover, and direct adsorption of free NH in the vermiculite layer. The NH mitigation of HSO-VM1 was comparable to that (90%) of the traditional method of HSO acidification for slurry storage (HSO-AC1). The NO emission, HS emission, and HSO consumption in HSO-VM1 were 28, 93 and 39% lower than those in HSO-AC1, respectively. Economic cost calculated based on material input in HSO-VM1 method was 0.40 USD m slurry. It's suggested that HSO-VM1 can be a possible alternative for reducing NH emissions from animal slurry storage.
动物粪便储存是氨排放的一个重要来源，其对空气质量和环境健康的影响已引起高度关注。迫切需要开发一种高效、绿色且安全的技术来减少氨排放。本研究介绍了一种使用硫酸氢盐改性膨胀蛭石覆盖物（HSO-VM1）减少奶牛粪便储存中氨排放的新方法。结果表明，在粪便储存77天期间，HSO-VM1处理实现了87%的氨减排，这主要可能是由于酸化粪便表面和蛭石层中游离氨转化为铵，气体排放的覆盖屏障，蛭石覆盖物对氨的吸附，以及蛭石层对游离氨的直接吸附。HSO-VM1的氨减排效果与传统的粪便储存硫酸酸化方法（HSO-AC1）的氨减排效果（90%）相当。HSO-VM1中的一氧化氮排放、硫化氢排放和硫酸氢盐消耗分别比HSO-AC1中的低28%、93%和39%。基于HSO-VM1方法的材料投入计算的经济成本为每立方米粪便0.40美元。建议HSO-VM1可作为减少动物粪便储存中氨排放的一种可能替代方法。
