畜禽粪便好氧发酵过程中挥发性气体排放差异研究

为有针对性地控制与治理不同畜禽粪便好氧发酵中产生的挥发性气体,设计了猪粪、牛粪和鸡粪好氧发酵试验,对畜禽粪便好氧发酵中产生的挥发性有机物(VOCs)以及NH₃、H₂S等挥发性气体进行分析研究。实验结果表明:畜禽粪便好氧发酵中挥发性气体的排放主要集中在好氧发酵前期,不同粪便好氧发酵产生的VOCs均有所区别,猪粪产生9种VOCs,牛粪产生4种VOCs,鸡粪产生8种VOCs;不同畜禽粪便好氧发酵中排放的主要VOCs均有二甲二硫、二甲三硫和甲硫醚,故在畜禽粪便好氧发酵中应针对这3种VOCs进行重点监控与治理。畜禽粪便好氧发酵中猪粪排放H₂S浓度最高,牛粪最低;鸡粪高浓度(> 200 μL·L^-1)排放NH₃持续时间最长,牛粪最短。

Volatile Gas Emissions from Different Types of Animal Manure During Aerobic Fermentation Process

Understanding volatile gases emitted from different types of animal manure is critical for effectively controlling them during aerobic fermentation of livestock and poultry manure. An experiment with pig manure, chicken manure and cow dung was conducted to examine volatile organic compounds(VOCs), NH₃, and H₂S produced during aerobic fermentation. The emissions of volatile gases occurred mainly at the earlier stage of aerobic fermentation. Different livestock and poultry manure produced different VOCs. The pig manure produced 9, the cow dung 4, and the chicken manure 8 kinds of VOCs. However, the major compounds of the VOCs included dimethyl disulfide, dimethyl trisulfide and dimethyl sulfide, indicating the importance of monitoring and managing these three VOCs. The emissions of H₂S were the highest from the pig manure, but the lowest from the cow dung. The emissions of NH₃ lasted the longest time from the chicken manure, whereas the shortest from the cow dung.