Back to Search
Start Over
Kinetic study of dry anaerobic co-digestion of food waste and cardboard for methane production
- Source :
- Waste Management, Waste Management, Elsevier, 2017, 69, pp.470-479. ⟨10.1016/j.wasman.2017.09.002⟩
- Publication Year :
- 2017
- Publisher :
- HAL CCSD, 2017.
-
Abstract
- International audience; Dry anaerobic digestion is a promising option for food waste treatment and valorization. However, accumulation of ammonia and volatile fatty acids often occurs, leading to inefficient processes and digestion failure. Co-digestion with cardboard may be a solution to overcome this problem. The effect of the initial substrate to inoculum ratio (0.25 to 1 gVS·g VS−1) and the initial total solids contents (20–30%) on the kinetics and performance of dry food waste mono-digestion and co-digestion with cardboard was investigated in batch tests. All the conditions produced methane efficiently (71–93% of the biochemical methane potential). However, due to lack of methanogenic activity, volatile fatty acids accumulated at the beginning of the digestion and lag phases in the methane production were observed. At increasing substrate to inoculum ratios, the initial acid accumulation was more pronounced and lower cumulative methane yields were obtained. Higher amounts of soluble organic matter remained undegraded at higher substrate loads. Although causing slightly longer lag phases, high initial total solids contents did not jeopardize the methane yields. Cardboard addition reduced acid accumulation and the decline in the yields at increasing substrate loads. However, cardboard addition also caused higher concentrations of propionic acid, which appeared as the most last acid to be degraded. Nevertheless, dry co-digestion of food waste and cardboard in urban areas is demonstrated as an interesting feasible valorization option.
- Subjects :
- Paper
020209 energy
[SDV]Life Sciences [q-bio]
02 engineering and technology
010501 environmental sciences
Solid Waste
7. Clean energy
01 natural sciences
biomethane
urban solid waste
Methane
12. Responsible consumption
chemistry.chemical_compound
Ammonia
Bioreactors
Biogas
11. Sustainability
0202 electrical engineering, electronic engineering, information engineering
Organic matter
Anaerobiosis
Waste Management and Disposal
0105 earth and related environmental sciences
2. Zero hunger
chemistry.chemical_classification
Waste management
cardboard
Fatty Acids, Volatile
Pulp and paper industry
Refuse Disposal
Anaerobic digestion
Food waste
chemistry
Food
13. Climate action
visual_art
microbial adaptation
solid-state AD
[SDE]Environmental Sciences
visual_art.visual_art_medium
Digestion
Subjects
Details
- Language :
- English
- ISSN :
- 0956053X
- Database :
- OpenAIRE
- Journal :
- Waste Management, Waste Management, Elsevier, 2017, 69, pp.470-479. ⟨10.1016/j.wasman.2017.09.002⟩
- Accession number :
- edsair.doi.dedup.....7c665f6ba8c308834e5853066a01e5d5