Metabolic performance of anaerobic digestion of chicken manure under wet, high solid, and dry conditions

Shaojie Bi; Maria Westerholm; Wei Qiao; Linpeng Xiong; Ahmed Mahdy; Dongmin Yin; Yunlong Song; Renjie Dong

doi:10.1016/j.biortech.2019.122342

Metabolic performance of anaerobic digestion of chicken manure under wet, high solid, and dry conditions

Bioresour Technol. 2020 Jan:296:122342. doi: 10.1016/j.biortech.2019.122342. Epub 2019 Oct 28.

Authors

Shaojie Bi¹, Maria Westerholm², Wei Qiao³, Linpeng Xiong¹, Ahmed Mahdy⁴, Dongmin Yin¹, Yunlong Song¹, Renjie Dong¹

Affiliations

¹ College of Engineering, China Agricultural University, Beijing 100083, China; State R & D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development, and Reform Committee (BGFuels), Beijing 100083, China.
² Department of Molecular Sciences, Swedish University of Agricultural Sciences, Uppsala BioCenter, Box 7025, SE-750 07 Uppsala, Sweden.
³ College of Engineering, China Agricultural University, Beijing 100083, China; State R & D Center for Efficient Production and Comprehensive Utilization of Biobased Gaseous Fuels, Energy Authority, National Development, and Reform Committee (BGFuels), Beijing 100083, China. Electronic address: qiaowei@cau.edu.cn.
⁴ Department of Agricultural Microbiology, Zagazig University, 44511 Zagazig, Egypt.

PMID: 31711908
DOI: 10.1016/j.biortech.2019.122342

Abstract

The anaerobic digestion (AD) of chicken manure as a solo substrate has been challenging due to the ammonium inhibition effects when adopting a high organic loading rate (OLR). In this study, through increasing both the total solid in the feeding materials from 5% to 20%, and the OLR from 1.7 to 7.1 g-volatile solids (VS)/(L·d), the AD of chicken manure under wet, high solid, and dry conditions, with a fixed hydraulic retention time of 20 days, was investigated. The results obtained indicated that the wet AD system could achieve a methane yield of 0.28 L/g-VS and a low volatile fatty acid level. However, the process deteriorated under dry conditions, and methane formed mainly through acetate oxidation and methanogenesis. Methanosarcina and Methanoplasma were found to be more tolerant But, whether the dry AD of chicken manure can survive an ammonia-stressed environment when the OLR is lowered, still needs investigation.

Keywords: Anaerobic digestion; Chicken manure; Methanogenic pathway; Microbial community; Organic loading rate.

MeSH terms

Anaerobiosis
Animals
Biofuels
Bioreactors
Chickens*
Manure*
Methane

Substances

Biofuels
Manure
Methane