Firmicutes primarily drive odor emission profiles in poultry manure treatments

作者：Longhai Chen, Han Meng, Jiaojiao Xu, Zhen Cao, Wenjun Chen, Boyu Jing, Guoliang Peng, Yan Wang, Xindi Liao, Yinbao Wu, Xin Wen · 发表于：Poultry Science · 年份：2024 · DOI：10.1016/j.psj.2024.104250 · 被引用次数：11 · 研究领域：Odor and Emission Control Technologies、Advanced Chemical Sensor Technologies、Fermentation and Sensory Analysis

Odor emission during livestock manure treatment poses a threat to the environment and human health. However, the odor emission profiles and related factors of commonly employed poultry manure treatments have rarely been studied. Here, we explored the odor emission profiles of 3 common poultry manure treatments in China, namely, ectopic fermentation beds (EFB), annular composting troughs (ACT) and air-drying rooms (ADR). The results revealed that the total odor concentrations in the EFB, ACT and ADR groups were 2407.67 ± 512.94, 13444.00 ± 1269.92 and 621.33 ± 59.27, respectively. The ACT had the greatest number of odorants (31), followed by the ADR (27) and the EFB (24). Methyl mercaptan, acetic acid, acetaldehyde, hydrogen sulfide, ammonia and acrolein were the key odorous compounds detected in all the treatments. ACT contained the greatest number of key odorants (11) and exhibited an extensive co-occurrence relationship with the bacterial community. The 3 poultry manure treatments exhibited significant differences in the beta diversities of the bacterial community. The phylum of most bacteria associated with key odorants was Firmicutes, and Enterococcus and Oceanobacillus were significantly positively correlated with methyl mercaptan. The bacterial functional groups were enriched in carbohydrate metabolism, amino acid metabolism and energy metabolism, and the functional genes shaped the odor emission patterns in the poultry manure treatments. Redundancy analysis demonstrate...