Different organic loading rates on the biogas production during the anaerobic digestion of rice straw: A pilot study

Jun Zhou; Jun Yang; Qing Yu; Xiaoyu Yong; Xinxin Xie; Lijuan Zhang; Ping Wei; Honghua Jia

doi:10.1016/j.biortech.2017.07.146

Different organic loading rates on the biogas production during the anaerobic digestion of rice straw: A pilot study

Jun Zhou, Jun Yang, Qing Yu, Xiaoyu Yong, Xinxin Xie, Lijuan Zhang, Ping Wei, Honghua Jia

COLLEGE OF BIOTECHNOLOGY AND PHARMACEUTICAL ENGINEERING

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

75 Scopus citations

Abstract

The aim of this work was to investigate the mesophilic methane fermentation of rice straw at different organic loading rates (OLRs) in a 300 m³ bioreactor. It was found that biogas production increased when the OLR was below 2.00 kg VS_substrate/(m³·d). The average volumetric biogas production reached 0.86 m³/(m³·d) at an OLR of 2.00 kg VS_substrate/(m³·d). Biogas production rate was 323 m³/t dry rice straw over the whole process. The pH, chemical oxygen demand, volatile fatty acid, and NH₄⁺-N concentrations were all in optimal range at different OLRs. High-throughput sequencing analysis indicated that Firmicutes, Fibrobacteres, and Spirochaetes predominated in straw samples. Chloroflexi, Proteobacteria, and Planctomycetes were more abundant in the slurry. The hydrogenotrophic pathway was the main biochemical pathway of methanogenesis in the reactor. This study provides new information regarding the OLR and the differences in the spatial distribution of specific microbiota in a rice straw biogas plant.

Original language	English
Pages (from-to)	865-871
Number of pages	7
Journal	Bioresource Technology
Volume	244
DOIs	https://doi.org/10.1016/j.biortech.2017.07.146
State	Published - Nov 2017

Keywords

Anaerobic digestion
Biogas
Microbial community
Organic loading rates
Rice straw

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2017.07.146

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title = "Different organic loading rates on the biogas production during the anaerobic digestion of rice straw: A pilot study",

abstract = "The aim of this work was to investigate the mesophilic methane fermentation of rice straw at different organic loading rates (OLRs) in a 300 m3 bioreactor. It was found that biogas production increased when the OLR was below 2.00 kg VSsubstrate/(m3·d). The average volumetric biogas production reached 0.86 m3/(m3·d) at an OLR of 2.00 kg VSsubstrate/(m3·d). Biogas production rate was 323 m3/t dry rice straw over the whole process. The pH, chemical oxygen demand, volatile fatty acid, and NH4+-N concentrations were all in optimal range at different OLRs. High-throughput sequencing analysis indicated that Firmicutes, Fibrobacteres, and Spirochaetes predominated in straw samples. Chloroflexi, Proteobacteria, and Planctomycetes were more abundant in the slurry. The hydrogenotrophic pathway was the main biochemical pathway of methanogenesis in the reactor. This study provides new information regarding the OLR and the differences in the spatial distribution of specific microbiota in a rice straw biogas plant.",

keywords = "Anaerobic digestion, Biogas, Microbial community, Organic loading rates, Rice straw",

author = "Jun Zhou and Jun Yang and Qing Yu and Xiaoyu Yong and Xinxin Xie and Lijuan Zhang and Ping Wei and Honghua Jia",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2017",

month = nov,

doi = "10.1016/j.biortech.2017.07.146",

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T1 - Different organic loading rates on the biogas production during the anaerobic digestion of rice straw

T2 - A pilot study

AU - Zhou, Jun

AU - Yang, Jun

AU - Yu, Qing

AU - Yong, Xiaoyu

AU - Xie, Xinxin

AU - Zhang, Lijuan

AU - Wei, Ping

AU - Jia, Honghua

PY - 2017/11

Y1 - 2017/11

N2 - The aim of this work was to investigate the mesophilic methane fermentation of rice straw at different organic loading rates (OLRs) in a 300 m3 bioreactor. It was found that biogas production increased when the OLR was below 2.00 kg VSsubstrate/(m3·d). The average volumetric biogas production reached 0.86 m3/(m3·d) at an OLR of 2.00 kg VSsubstrate/(m3·d). Biogas production rate was 323 m3/t dry rice straw over the whole process. The pH, chemical oxygen demand, volatile fatty acid, and NH4+-N concentrations were all in optimal range at different OLRs. High-throughput sequencing analysis indicated that Firmicutes, Fibrobacteres, and Spirochaetes predominated in straw samples. Chloroflexi, Proteobacteria, and Planctomycetes were more abundant in the slurry. The hydrogenotrophic pathway was the main biochemical pathway of methanogenesis in the reactor. This study provides new information regarding the OLR and the differences in the spatial distribution of specific microbiota in a rice straw biogas plant.

AB - The aim of this work was to investigate the mesophilic methane fermentation of rice straw at different organic loading rates (OLRs) in a 300 m3 bioreactor. It was found that biogas production increased when the OLR was below 2.00 kg VSsubstrate/(m3·d). The average volumetric biogas production reached 0.86 m3/(m3·d) at an OLR of 2.00 kg VSsubstrate/(m3·d). Biogas production rate was 323 m3/t dry rice straw over the whole process. The pH, chemical oxygen demand, volatile fatty acid, and NH4+-N concentrations were all in optimal range at different OLRs. High-throughput sequencing analysis indicated that Firmicutes, Fibrobacteres, and Spirochaetes predominated in straw samples. Chloroflexi, Proteobacteria, and Planctomycetes were more abundant in the slurry. The hydrogenotrophic pathway was the main biochemical pathway of methanogenesis in the reactor. This study provides new information regarding the OLR and the differences in the spatial distribution of specific microbiota in a rice straw biogas plant.

KW - Anaerobic digestion

KW - Biogas

KW - Microbial community

KW - Organic loading rates

KW - Rice straw

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SN - 0960-8524

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ER -

Different organic loading rates on the biogas production during the anaerobic digestion of rice straw: A pilot study

Abstract

Keywords

UN SDGs

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