Journal
BIORESOURCE TECHNOLOGY
Volume 248, Issue -, Pages 187-193Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.07.013
Keywords
Food waste; Methane fermentation; Ethanol prefermentation; Microbial community; High-throughput sequencing
Funding
- National Natural Science Foundation of China [51278063]
- National Key Technology RD Program [2014BAC24B01]
Ask authors/readers for more resources
This study investigates the effects of ethanol prefermentation (EP) on methane fermentation. Yeast was added to the substrate for EP in the sequencing batch methane fermentation of food waste. An Illumina MiSeq high-throughput sequencing system was used to analyze changes in the microbial community. Methane production in the EP group (254 mL/g VS) was higher than in the control group (35 mL/g VS) because EP not only increased the buffering capacity of the system, but also increased hydrolytic acidification. More carbon source was converted to ethanol in the EP group than in the control group, and neutral ethanol could be converted continuously to acetic acid, which promoted the growth of Methanobacterium and Methanosarcina. As a result, the relative abundance of methane-producing bacteria was significantly higher than that of the control group. Kinetic modeling indicated that the EP group had a higher hydrolysis efficiency and shorter lag phase. (C) 2017 Elsevier Ltd. All rights reserved.
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