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Article

Digestion Performance and Microbial Metabolic Mechanism in Thermophilic and Mesophilic Anaerobic Digesters Exposed to Elevated Loadings of Organic Fraction of Municipal Solid Waste

by 1,2,3,4, 2,3,4,*, 2,3,4, 2,3,4, 2,3,4,5, 2,3,4,5 and 1,*
1
College of Engineering, Northeast Agricultural University, Harbin 150030, China
2
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
3
CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China
4
Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China
5
University of Chinese Academy of Sciences, Beijing 100049, China
*
Authors to whom correspondence should be addressed.
Energies 2018, 11(4), 952; https://doi.org/10.3390/en11040952
Received: 8 February 2018 / Revised: 14 March 2018 / Accepted: 20 March 2018 / Published: 17 April 2018
Mesophilic and thermophilic anaerobic digestion reactors (MR and TR) for the organic fraction of municipal solid waste (OFMSW) were tested to reveal the differential microbial responses to increasing organic loading rate (OLR). MR exhibited faster adaptation and better performance at an OLR range of 1.0–2.5 g VS·L−1·d−1, with average profiles of a biogas yield of 0.38 L/gVSadded*d at 0.5 g/L*d OLR and 0.69 L/gVSadded*d at 2.5 g/L*d OLR, whereas TR had a biogas yield of 0.07 L/gVSadded*d at 0.5 g/L*d OLR and 0.44 L/gVSadded*d at 2.5 g/L*d OLR. The pyrosequencing results of amplicons revealed the microbial mechanisms of OFMSW anaerobic digestion. Larger shifts in the bacteria composition were observed in the TR with OLR elevation. For methanogens in both reactors, Methanothrix dominated in the MR while Methanosarcina was favored in the TR. Moreover, analysis of the mode and efficiency of metabolism between the MR and TR demonstrated different performances with more efficiency related to the limiting hydrolytic acid step. View Full-Text
Keywords: anaerobic digestion; organic fraction of municipal solid waste; microbial mechanisms; metabolism analysis anaerobic digestion; organic fraction of municipal solid waste; microbial mechanisms; metabolism analysis
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MDPI and ACS Style

Gao, Y.; Kong, X.; Xing, T.; Sun, Y.; Zhang, Y.; Luo, X.; Sun, Y. Digestion Performance and Microbial Metabolic Mechanism in Thermophilic and Mesophilic Anaerobic Digesters Exposed to Elevated Loadings of Organic Fraction of Municipal Solid Waste. Energies 2018, 11, 952. https://doi.org/10.3390/en11040952

AMA Style

Gao Y, Kong X, Xing T, Sun Y, Zhang Y, Luo X, Sun Y. Digestion Performance and Microbial Metabolic Mechanism in Thermophilic and Mesophilic Anaerobic Digesters Exposed to Elevated Loadings of Organic Fraction of Municipal Solid Waste. Energies. 2018; 11(4):952. https://doi.org/10.3390/en11040952

Chicago/Turabian Style

Gao, Yiming, Xiaoying Kong, Tao Xing, Yongming Sun, Yi Zhang, Xingjian Luo, and Yong Sun. 2018. "Digestion Performance and Microbial Metabolic Mechanism in Thermophilic and Mesophilic Anaerobic Digesters Exposed to Elevated Loadings of Organic Fraction of Municipal Solid Waste" Energies 11, no. 4: 952. https://doi.org/10.3390/en11040952

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