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Performance and kinetic evaluation of semi-continuously fed anaerobic digesters treating food waste: role of trace elements
- Source :
- Bioresource technology. 178
- Publication Year :
- 2014
-
Abstract
- This study investigated the effects of trace elements (TEs) on the anaerobic digestion (AD) of food waste (FW) in laboratory-scale semi-continuously fed anaerobic digesters. The duration of digesters operation was approximately 400 days. Organic loading rates (OLRs) ranged from 1.0 to 5.5 g VS L(-1) d(-1) at 37 °C. Results showed that methane production of the digester was severely inhibited at a volatile fatty acid (VFA) concentration of 30,000 mg L(-1) at OLR of 4.0 g VS L(-1) d(-1) in the absence of TEs. Contrary to the failed digesters, a stable performance was achieved in the TEs added digesters. High methane yield (approximately 465.4 mL CH4 g(-1)VSadded) was obtained, and no significant accumulation of VFA was observed in the TEs added digesters at OLR of 1.0-5.0 g VS L(-1) d(-1) and HRT of 40 days. These findings strongly indicated that the addition of TEs has an important impact on the operation stability of AD of FW.
- Subjects :
- Environmental Engineering
Biomass
Bioengineering
Methane
chemistry.chemical_compound
Animal science
Bioreactors
Bioreactor
Anaerobiosis
Methane production
Waste Management and Disposal
Biological Oxygen Demand Analysis
Waste Products
Renewable Energy, Sustainability and the Environment
Chemistry
Environmental engineering
food and beverages
General Medicine
Hydrogen-Ion Concentration
Fatty Acids, Volatile
Refuse Disposal
Trace Elements
Anaerobic digestion
Food waste
Kinetics
Biofuel
Food
Biofuels
Anaerobic exercise
Subjects
Details
- ISSN :
- 18732976
- Volume :
- 178
- Database :
- OpenAIRE
- Journal :
- Bioresource technology
- Accession number :
- edsair.doi.dedup.....4fca93d9150265c9c7d4c47214f79482