Journal
BIORESOURCE TECHNOLOGY
Volume 250, Issue -, Pages 812-820Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.12.004
Keywords
Anaerobic digestion; Biochar; Volatile fatty acids; Syntrophic metabolism; Interspecies electron transfer
Funding
- National Natural Science Foundation of China [51608430]
- Natural Science Foundation for Young Scientists of Xi'an University of Architecture and Technology, China [QN1615]
- Scientific Research Program - Shaanxi Provincial Education Department [17JS077]
Ask authors/readers for more resources
Biochar was added to a mesophilic anaerobic digester to promote syntrophic volatile fatty acids (VFAs) oxidation and methane production from complex organic wastes. Compared with conventional operation, biochar addition effectively shortened the lag time by 27.5-64.4% and increased the maximum methane production rate by 22.4%-40.3%. With a biochar dosage of 15 g/L, the system performed well under an organic loading rate as high as 3 g substrate/g inoculums. Biochar showed a remarkable buffering capacity to alleviate pH decrease caused by VFAs accumulation. In order to gain knowledge on associated mechanisms, a specific experiment was conducted using butyrate as substrate. It was identified that syntrophic degradation of butyrate to acetate occurred under high H-2 partial pressure. By microbial community analysis, it was further revealed that biochar addition brought about the enrichment of Anaerolineaceae and Methanosaeta, typical microorganisms for direct interspecies electron transfer.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available