Abstract
The objective of this study was to assess the feasibility of co-digesting food waste (FW) and de-oiled grease trap waste (GTW) to improve the biogas production. A lab-scale mesophilic digester (MD), a temperature-phased anaerobic digester (TPAD) and a TPAD with recycling (TPAD-R) were synchronously operated under mono-digestion (FW) and co-digestion (FW. +. de-oiled GTW). Co-digestion increased the biogas yield by 19% in the MD and TPAD-R, with a biogas yield of 0.60. L/g VS added. Specific methanogenic activity in the TPAD-R was much higher than that in the MD. In addition to methane, hydrogen at a yield of approximately 1. mol/mol hexose was produced in the TPAD-R. Alkalinity was consumed more in the co-digestion than in mono-digestion. Co-digestion resulted in more lipid accumulation in each digester. The MD favored the degradation of lipid and conversion of long-chain fatty acids more than the TPAD and TPAD-R.
| Original language | English |
|---|---|
| Pages (from-to) | 237-244 |
| Number of pages | 8 |
| Journal | Bioresource Technology |
| Volume | 201 |
| DOIs | |
| Publication status | Published - 2016 Feb 1 |
Keywords
- Anaerobic digestion
- Food waste (FW)
- Grease trap waste (GTW)
- Long-chain fatty acid (LCFA)
- Temperature-phased anaerobic digestion (TPAD)
ASJC Scopus subject areas
- Bioengineering
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment
- Waste Management and Disposal