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Performance of Coupling an Aerobic Pre-treatment Prior to a Solid-State Anaerobic Digestion of Food Waste
- Source :
- Waste and Biomass Valorization, Waste and Biomass Valorization, Springer, 2020, 11 (2), pp.483-494. ⟨10.1007/s12649-019-00630-z⟩
- Publication Year :
- 2019
- Publisher :
- Springer Science and Business Media LLC, 2019.
-
Abstract
- International audience; An experimental design was proposed to test the influence of three parameters on the performance of food waste (FW) dry anaerobic digestion (AD) coupled with aerobic pre-treatment: (1) the type of aerobic pre-treatment (no pre-treatment/dynamic aeration/static storage); (2) the composition of FW (paper/no paper) and (3) the frequency of leachate recirculation in the batch leach bed reactor (LBR) used as dry AD process. Performance of AD was assessed by measuring pH, VFA, biogas production and by modelling the kinetics of methane production using modified Gompertz equation. A statistical analysis of variance showed that AD leachate recirculation condition was the most impacting parameter on methane production. A high production of VFA was noticed (~ 25 gDCO·L '1 ) that did not lead to inhibition due to high buffer capacity of inoculum (5.2 gN-NH 4 + ·L '1 ). 80% of the biomethane potential was reached in the batch test with a daily leachate recirculation and with FW without paper. According to simulations, an experimental duration of 31'32 days showed to be optimal to reach 90% of degradation potential under these LBR conditions. A lower frequency of leachate recirculation or the addition of paper decreased methane production. The introduction of a two-day aeration step stabilized the production of VFA along the digestion process and enhanced the methane production on FW with paper. Conversely a two-day storage step induced a rapid acidification and a subsequent significant decrease of methane production rate. © 2019, Springer Nature B.V.
- Subjects :
- 0106 biological sciences
Environmental Engineering
LEACH BED REACTOR
DRY ANAEROBIC DIGESTIONS
BIOMETHANE POTENTIAL (BMP)
020209 energy
Gompertz function
ANAEROBIC DIGESTION
EQUATION DE GOMPERTZ
02 engineering and technology
LEACHING
01 natural sciences
7. Clean energy
LEACH BED REACTORS
METHANE
PAPER ADDITION
FOOD STORAGE
Biogas
010608 biotechnology
0202 electrical engineering, electronic engineering, information engineering
LEACHATE TREATMENT
Leachate
Waste Management and Disposal
SOLID-STATE ANAEROBIC DIGESTIONS
Renewable Energy, Sustainability and the Environment
Chemistry
SCREENING DESIGN
STATIC STORAGE
Pulp and paper industry
6. Clean water
Anaerobic digestion
Food waste
13. Climate action
[SDE]Environmental Sciences
PAPER
GOMPERTZ MODIFIED
Degradation (geology)
Aeration
MODIFIED GOMPERTZ EQUATIONS
Digestion
METHANE KINETICS
Subjects
Details
- ISSN :
- 1877265X and 18772641
- Volume :
- 11
- Database :
- OpenAIRE
- Journal :
- Waste and Biomass Valorization
- Accession number :
- edsair.doi.dedup.....6eb061225be95aeda3449303a10473b1