家庭厌氧消化池中的微生物群落结构揭示了潜在的不同废物转化途径

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2023-11-01 DOI:10.1089/ees.2023.0038

Heidi L. Gough, Abigail Kargol, David A.C. Beck, Benjamin G. Therrien, Bed Mani Dahal, Michael D. Marsolek

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引用次数: 1

摘要

家庭规模的农村沼气池在尼泊尔广泛实施，用于分散社区的废物管理、资源回收和环境管理。然而，关于现实世界家庭农场消化器中微生物群落结构的文献很少。这项工作将四个家庭消化器中的微生物群落结构与附近的市政消化器进行了比较。家庭蒸煮器包括位于尼泊尔Mosi珠穆朗玛峰(海拔2634米)的高海拔家庭蒸煮器。群落结构的差异包括深海古菌MGC-6在家庭消化器中的患病率。MCG-6是一种古细菌种群，据推测参与自养醋酸盐的生成和纤维素向糖的转化。此外，Rikenellaceae DMER64，一个被认为可以降解糖的种群，在家族消化器中更为普遍。产甲烷菌与氢营养型产甲烷菌的比例在家族沼气池中较高。此外，共生产氢菌的优势种也存在差异。在废物活性污泥消化池中有重要作用的共生细菌和共生单胞菌未被检测到。综上所述，观察到的微生物群落组成差异表明，在所研究的消化器中，古细菌具有支持不同底物转化途径的能力，并且除了产甲烷之外，古细菌还发挥着重要作用。

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Microbial Community Structures in Family Anaerobic Digesters Reveal Potentially Differing Waste Conversion Pathways

Family-scale rural digesters are widely implemented in Nepal for waste management, resource recovery, and environmental stewardship for distributed communities. However, there is little documentation on the microbial community structures in real-world family farm digesters. This work compared microbial community structures in four family digesters with a near-by municipal digester. Included in the family digesters was a high-altitude family digester located on Mt. Everest in Mosi, Nepal (2,634 m elevation). Differences in the community structures included the prevalence in family digesters of Bathyarchaeota MGC-6. MCG-6 is an archaeal population putatively involved in autotrophic acetate generation and conversion of cellulose to sugars. In addition, Rikenellaceae DMER64, a population thought to degrade sugars, was more prevalent in the family digesters. The ratio of Methanothrix to hydrogenotrophic methanogens was higher in the family digesters. In addition, the dominant species of syntrophic hydrogen-producing bacteria differed. Syntrophobacter and Syntrophomonas species, documented for their critical roles in waste activated sludge digesters, were not detected. In conclusion, observed differences in microbial community composition suggested a capacity to support different substrate conversion pathways and a major role of Archaea beyond methanogenesis among the studied digesters.

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.