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Kinetics of Biotic and Abiotic CO Production during the Initial Phase of Biowaste Composting
- Source :
- Energies, Vol 13, Iss 5451, p 5451 (2020), Energies, Volume 13, Issue 20
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- Knowledge of kinetic parameters of CO production during biowaste composting is significantly important for the prediction of its course and estimation of total gas quantity. This allows increasing the control of the process, to minimize its negative impact on the environment and to protect the occupational safety of employees exposed to CO in the biowaste composting plant. For the first time, a full study of the influence of temperature and biowaste sterilization on the kinetics of CO production is presented. The lab-scale experiments used a mixture of green waste, dairy cattle manure, and sawdust in two variants: sterilized and non-sterilized samples. The process was carried out in controlled temperature reactors with measuring the concentrations of CO, O2, and CO2 every 12 h.CO production and k value increased with temperature. However, higher CO production was observed in biotic conditions between 10~50 &deg<br />C, suggesting the biotic CO formation and 1st-order kinetics. The abiotic (thermochemical) process was more efficiently generating CO above 50 &deg<br />C, described with a 0-order kinetic model. Additionally, the rate constant (k) value of CO production under biotic conditions was increasing up to a temperature of 60 &deg<br />C, above which a slight decrease in CO production rate was observed at 70 &deg<br />C. The presented results are the basis for further studies focused on the feasibility of (1) the mitigation and (2) valorization of CO production during the biowaste biostabilization are warranted.
- Subjects :
- biotic
Control and Optimization
020209 energy
Kinetics
biorenewables
Energy Engineering and Power Technology
02 engineering and technology
010501 environmental sciences
aerobic digestion
01 natural sciences
lcsh:Technology
carbon monoxide
Reaction rate constant
0202 electrical engineering, electronic engineering, information engineering
Aerobic digestion
Electrical and Electronic Engineering
Engineering (miscellaneous)
0105 earth and related environmental sciences
Abiotic component
Renewable Energy, Sustainability and the Environment
Chemistry
green chemistry
lcsh:T
GHGs mitigation
Sterilization (microbiology)
Pulp and paper industry
kinetic modeling
biowaste
Manure
Green waste
visual_art
visual_art.visual_art_medium
waste management
Sawdust
abiotic
Energy (miscellaneous)
Subjects
Details
- Language :
- English
- ISSN :
- 19961073
- Volume :
- 13
- Issue :
- 5451
- Database :
- OpenAIRE
- Journal :
- Energies
- Accession number :
- edsair.doi.dedup.....d3654c362294e72a739f7a989e6b7b4c