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Effects of substrate organic composition on mesophilic and thermophilic anaerobic co-digestion of food waste and paper waste.
- Source :
-
Chemosphere [Chemosphere] 2022 Mar; Vol. 291 (Pt 3), pp. 132933. Date of Electronic Publication: 2021 Nov 17. - Publication Year :
- 2022
-
Abstract
- Facing the huge output of food waste (FW) and paper waste (PW), long-term semi-continuous experiments were carried out to investigate the effect of the substrate organic composition on mesophilic and thermophilic anaerobic co-digestions (Co-ADs) of their mixtures. The experimental results showed that the organic composition of the substrate affected the biogas and methane production and yield of the two Co-ADs of the FW and PW mixtures, and its effect on thermophilic Co-AD (Co-TAD) was lower than that on mesophilic Co-AD (Co-MAD). The two Co-ADs had similar biogas (2.158 ± 0.136 L/L/d and 2.183 ± 0.142 L/L/d) and methane production (1.245 ± 0.082 L/L/d and 1.279 ± 0.088 L/L/d), and organic matter degradation (81.79 ± 1.07% and 83.81 ± 1.09%) when the substrate organic composition was carbohydrates:proteins:lipids = 6.8:1.8:1 (low carbohydrate composition, FW:PW = 4:1). When the substrate organic composition was carbohydrates:proteins:lipids = 13.5:2:1 (high carbohydrate composition, FW:PW = 1:1), the thermophilic temperature was more favorable than the mesophilic temperature for the Co-AD of FW and PW mixtures. The characteristics (pH, total ammonia, total volatile fatty acids, and total alkalinity) of the Co-TAD digestate were more sensitive to changes in the organic composition of the substrate than those of the Co-MAD digestate. Increasing the carbohydrate content of the FW:PW mixture lowered the production of biogas and methane, and degradation of organic matter in both Co-ADs.<br /> (Copyright © 2021 Elsevier Ltd. All rights reserved.)
- Subjects :
- Anaerobiosis
Biofuels
Bioreactors
Digestion
Methane
Sewage
Food
Refuse Disposal
Subjects
Details
- Language :
- English
- ISSN :
- 1879-1298
- Volume :
- 291
- Issue :
- Pt 3
- Database :
- MEDLINE
- Journal :
- Chemosphere
- Publication Type :
- Academic Journal
- Accession number :
- 34800507
- Full Text :
- https://doi.org/10.1016/j.chemosphere.2021.132933