Biodegradation of skatole by Bacillus subtilis GDAAS-A32 and its inhibition for odor emissions from swine manure

文献类型： 外文期刊

第一作者： Hu, Jing-Yi

作者： Hu, Jing-Yi;Han, Xue-Ying;Luo, Xiao-Chun;Hu, Jing-Yi;Han, Xue-Ying;Chen, Hong-Pin;Wang, Zhi-Lin;Deng, Jun-Jin;Li, Jia-Zhou;Li, Jia-Zhou;Deng, Jun-Jin

作者机构：

关键词： Manure deodorization; Skatole degradation; Bacillus subtilis; Microbial community

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）

ISSN： 2213-2929

年卷期： 2025 年 13 卷 2 期

页码：

收录情况： SCI

摘要： Odor emissions from livestock production represent a significant environmental challenge, arising from the release of a complex mixture of malodorous compounds. Among these compounds, skatole is particularly notorious for its pungent and offensive odor. However, efforts to address this issue have been hindered by the lack of effective skatole-degrading bacterial strains that are both suitable for application in animal husbandry and capable of operating under real-world conditions. This study introduces a novel strain of Bacillus subtilis, designated GDAAS-A32, which carries a unique plasmid conferring exceptional skatole-degrading capabilities not previously observed in other strains of B. subtilis. In M9-skatole medium, GDAAS-A32 degraded 200 mg/L skatole within just 40 hours. Remarkably, GDAAS-A32 demonstrates the ability to thrive in low-oxygen environments characteristic of swine manure accumulation, where it exhibits exceptional deodorization properties. When applied to swine manure, GDAAS-A32 reduced skatole emissions by more than 67 %, while ammonia (NH3) and hydrogen sulfide (H2S) emissions were decreased by 89.1 % and 87.7 %, respectively. These results were accompanied by significant alterations in the fecal microbiota, including the suppression of odor-producing microorganisms, which in turn mitigated the production of ammonia and hydrogen sulfide. Further metabolomic analysis confirmed that GDAAS-A32 enhances skatole degradation within swine manure through the activation of specific metabolic pathways. These findings underscore the potential of GDAAS-A32 as a promising candidate for odor mitigation in animal husbandry. By simultaneously degrading skatole and suppressing odor-producing microorganisms, GDAAS-A32 offers a safe, easily producible, and efficient solution to fecal odor management, contributing to sustainable and environmentally friendly livestock practices. Short synopsis statement: The management of odor is a challenge in animal husbandry. This study reports an efficiently skatole-degradation Bacillus subtilis with an excellent deodorization effect on swine manure.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序