Journal
BIORESOURCE TECHNOLOGY
Volume 279, Issue -, Pages 234-242Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.01.140
Keywords
Aerobic composting; Greenhouse gas mitigation; Compost maturity; Electroactive bacteria; Electric field
Funding
- China Postdoctoral Science Foundation [2017M622042]
- Fujian Science and Technology Department Natural Science Fund Project [2017J05060]
- Key Technologies R&D Program of Fujian [2017NZ0001-1]
- Program for Innovative Research Team in Science and Technology in Fujian Province University (IRTSTFJ)
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The long maturation period and greenhouse gas (GHG) emission are two major problems that arise during aerobic composting, mainly due to the low efficiency of O-2 transmission and utilization. In this study, a novel electric-field-assisted aerobic composting (EAC) process was tested by simply applying a direct-current voltage of 2 V to a conventional aerobic composting (CAC) process. Compared with the CAC process, the maturation time and the total GHG for the EAC process were reduced by 33% and 70%, respectively. Furthermore, the analyses of O-2 consumption and microbial communities demonstrated that the electric field had enhanced O-2 utilization by 30 +/- 9% and increased the relative abundance of electroactive bacteria by about 3.4-fold compared to CAC. This work has represented a proof of principle for EAC and suggests that the electric field is an effective and environmentally friendly strategy for enhancing compost maturity and mitigating GHG emissions during aerobic composting.
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