State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Innovation Base of Groundwater & Environmental System Engineering, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
College of Life Science, Northeast Agricultural University, Harbin 150030, China.
Bioresour Technol. 2020 Oct;314:123765. doi: 10.1016/j.biortech.2020.123765. Epub 2020 Jul 2.
Microbial metabolism of complex organic components can drive different microbial communities, which is significant to the process of dry anaerobic digestion (AD). However, possible mechanisms between organic components and the corresponding microbial communities during the process of dry AD is poorly investigated. Results showed that the microbial species affecting the degradation of organic components were 69 nodes (13.3%) in the hydrolysis stage, hemicellulose was mainly degraded by Methanobacterium (2.3%), with a degradation rate of 35.0%. In the acetogenesis stage, the microbial species were 27 nodes (10.3%), hemicellulose was mainly degraded by LK-44f (0.1%) and Treponema (0.3%), with a degradation rate of 52.2%. In the methanogenesis stage, the microbial species were 10 nodes (4.8%), polysaccharide was mainly degraded by Ureibacillus (0.1%), with a degradation rate of 46.9%. The study provides theoretical support for the rapid degradation of complex components by segment-oriented regulation.
复杂有机成分的微生物代谢可以驱动不同的微生物群落，这对干厌氧消化（AD）过程具有重要意义。然而，在干 AD 过程中，有机成分与相应微生物群落之间的可能机制尚未得到充分研究。结果表明，在水解阶段影响有机成分降解的微生物种类为 69 个节点（13.3%），其中产甲烷菌（Methanobacterium）主要降解半纤维素，降解率为 35.0%。在产乙酸阶段，微生物种类为 27 个节点（10.3%），其中 LK-44f（0.1%）和螺旋菌属（Treponema）主要降解半纤维素，降解率为 52.2%。在产甲烷阶段，微生物种类为 10 个节点（4.8%），其中 Ureibacillus（0.1%）主要降解多糖，降解率为 46.9%。该研究为采用分段定向调控实现复杂成分的快速降解提供了理论支持。
