Please use this identifier to cite or link to this item: https://doi.org/10.1038/s41598-017-11826-5
Title: Metagenomic insight into the microbial networks and metabolic mechanism in anaerobic digesters for food waste by incorporating activated carbon
Authors: Zhang, J 
Mao, L 
Zhang, L 
Loh, K.-C 
Dai, Y
Tong, Y.W 
Keywords: methane
anaerobic growth
biology
biosynthesis
energy metabolism
fermentation
food
metabolism
metagenome
metagenomics
microflora
procedures
sewage
Anaerobiosis
Computational Biology
Energy Metabolism
Fermentation
Food
Metabolic Networks and Pathways
Metagenome
Metagenomics
Methane
Microbiota
Waste Disposal, Fluid
Issue Date: 2017
Citation: Zhang, J, Mao, L, Zhang, L, Loh, K.-C, Dai, Y, Tong, Y.W (2017). Metagenomic insight into the microbial networks and metabolic mechanism in anaerobic digesters for food waste by incorporating activated carbon. Scientific Reports 7 (1) : 11293. ScholarBank@NUS Repository. https://doi.org/10.1038/s41598-017-11826-5
Abstract: Powdered activated carbon (AC) is commonly used as an effective additive to enhance anaerobic digestion (AD), but little is known about how the metabolic pathways resulting from adding AC change the microbial association network and enhance food waste treatment. In this work, the use of AC in an anaerobic digestion system for food waste was explored. Using bioinformatics analysis, taxonomic trees and the KEGG pathway analysis, changes in microbial network and biometabolic pathways were tracked. The overall effect of these changes were used to explain and validate improved digestion performance. The results showed that AC accelerated the decomposition of edible oil in food waste, enhancing the conversion of food waste to methane with the optimized dosage of 12 g AC per reactor. Specifically, when AC was added, the proponoate metabolic pathway that converts propanoic acid to acetic acid became more prominent, as measured by 16S rRNA in the microbial community. The other two metabolic pathways, Lipid Metabolism and Methane Metabolism, were also enhanced. Bioinformatics analysis revealed that AC promoted the proliferation of syntrophic microorganisms such as Methanosaeta and Geobacter, forming a highly intensive syntrophic microbial network. © 2017 The Author(s).
Source Title: Scientific Reports
URI: https://scholarbank.nus.edu.sg/handle/10635/175170
ISSN: 20452322
DOI: 10.1038/s41598-017-11826-5
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