Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 765, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.144632
Keywords
Food waste; Anaerobic co-digestion; Methane potential; Synergistic effect; Microbial community
Categories
Funding
- National Key Research and Development Program of China [2018YFC1901000]
- Key Project of Shanghai Science and Technology Commission [18391902600]
- Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration [SHUES2020B04]
- Fundamental Research Funds for the Central Universities
Ask authors/readers for more resources
The study demonstrates the potential of anaerobic co-digestion of cooked and uncooked food waste along with rice straw to maximize methane production, showing promise for improving the efficiency of municipal 'wet' waste treatment in urban areas.
With the implementation of new domestic garbage classification policy in China, attention is growing to improve the treatment efficiency of municipal 'wet' waste. Combing with the new regulation, the synergistic strategy and the microbial ecology of the anaerobic co-digestion (AcoD) of cooked food waste (CFW), uncooked food waste (UCFW) and rice straw (RS) were analyzed in current study. Results showed that the maximum cumulative methane yield (CMY) and synergic index were obtained when CFW and UCFW were mixed at the ratio of 1:1 (based on volatile solid content). The highest CMY 452.94 +/- 0.99 mL/g-VS was obtained when the ratio of CFW, UCFW and RS was 0.81:0.09:0.10, which was 16.29%, 36.20% and 121.84% higher than their mono-digestion, respectively. The AcoD promoted the methane potential by prolonging the release time of organic matter and slowing down the hydrolysis rate. Furthermore, the AcoD increased the species diversification and relative abundance of fermentation bacteria in digesters, and Methanosaeta predominated the methanogen communities. This study demonstrated a clean and sustainable AcoD strategy for safe disposal of urban food waste and revealed the variation of microbial community, which can provide a base for efficient bioenergy recovery from urban domestic garbage. (C) 2020 Elsevier B.V. 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