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Linking microbial community structure with molecular composition of dissolved organic matter during an industrial-scale composting. 2021

Jiangang Che, and Yudan Bai, and Xi Li, and Jie Ye, and Hanpeng Liao, and Peng Cui, and Zhen Yu, and Shungui Zhou
Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, Fujian Agriculture and Forestry University, Fuzhou 350002, China.

This study explored the interactions between dissolved organic matter (DOM) composition and microbial community structure during an industrial-scale composting by Fourier transform ion cyclotron resonance mass spectrometry and 16S rRNA sequencing analysis. The results revealed that DOM from matured compost contained primarily lignins/carboxylic-rich alicyclic molecules (73.6%), the higher double bond equivalent (5.97) and aromaticity index (0.18), indicating that the molecular composition of DOM had changed substantially. Drastic changes in microbial community structure were also observed along with the DOM transformation process of composting. Network analysis further indicated that Caldicoprobacter, Bacillus, and Dechloromonas were associated with the most DOM subcategories. Caldicoprobacter could degrade carbohydrates, Bacillus accelerated the humification by transforming N-containing compounds, and Dechloromonas could degrade polycyclic aromatic hydrocarbons distributed in low O/C. These findings are helpful for understanding the molecular mechanisms of DOM transformation and humification of sludge composting.

UI MeSH Term Description Entries
D000076282 Composting A process of waste disposal involving the conversion of green waste (i.e. leaves, organic matter, food waste, manure) into soil-enhancing matter. Compost
D012336 RNA, Ribosomal, 16S Constituent of 30S subunit prokaryotic ribosomes containing 1600 nucleotides and 21 proteins. 16S rRNA is involved in initiation of polypeptide synthesis. 16S Ribosomal RNA,16S rRNA,RNA, 16S Ribosomal,Ribosomal RNA, 16S,rRNA, 16S
D012722 Sewage Refuse liquid or waste matter carried off by sewers. Sludge,Sludge Flocs
D013058 Mass Spectrometry An analytical method used in determining the identity of a chemical based on its mass using mass analyzers/mass spectrometers. Mass Spectroscopy,Spectrometry, Mass,Spectroscopy, Mass,Spectrum Analysis, Mass,Analysis, Mass Spectrum,Mass Spectrum Analysis,Analyses, Mass Spectrum,Mass Spectrum Analyses,Spectrum Analyses, Mass
D064307 Microbiota The full collection of microbes (bacteria, fungi, virus, etc.) that naturally exist within a particular biological niche such as an organism, soil, a body of water, etc. Human Microbiome,Microbiome,Microbiome, Human,Microbial Community,Microbial Community Composition,Microbial Community Structure,Community Composition, Microbial,Community Structure, Microbial,Community, Microbial,Composition, Microbial Community,Human Microbiomes,Microbial Communities,Microbial Community Compositions,Microbial Community Structures,Microbiomes,Microbiotas

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