Valorization of Fourth-Range Wastes: Evaluating Pyrolytic Behavior of Fresh and Digested Wastes
Changes in daily habits and a stressful lifestyle create modifications in consumer preferences and open opportunities to new market products. This is the case of fourth-range products in which the industrial sector generates a waste stream of high quality. Valorization of this type of waste as a sin...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Fermentation |
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| Online Access: | https://www.mdpi.com/2311-5637/8/12/744 |
| _version_ | 1797459055952789504 |
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| author | Elia Judith Martínez Rubén González Marcos Ellacuriaga Xiomar Gómez |
| author_facet | Elia Judith Martínez Rubén González Marcos Ellacuriaga Xiomar Gómez |
| author_sort | Elia Judith Martínez |
| collection | DOAJ |
| description | Changes in daily habits and a stressful lifestyle create modifications in consumer preferences and open opportunities to new market products. This is the case of fourth-range products in which the industrial sector generates a waste stream of high quality. Valorization of this type of waste as a single stream is desirable to avoid lowering quality with other low-grade materials. Anaerobic digestion of fourth-range wastes was studied under discontinuous and semi-continuous conditions. A high carbon content characterizes the organic material composed of fruit and vegetable wastes. The fast degradation of the substrate indicated no limitations associated with the hydrolysis stage, as observed from kinetic parameters estimated from batch assays. However, the easiness of degradation did not translate into short hydraulic retention times when operating under semi-continuous conditions. Additionally, the insufficient amount of nutrients prevented the development of a well-balanced digestion process. Specific methane production was 325 mL CH<sub>4</sub>/g VS added at a hydraulic retention time of 30 days. However, solid accumulation was observed at the end of the experiment, indicating that conditions established did not allow for the complete conversion of the organic material. Digestate evaluation using thermal analysis under inert conditions showed a thermal profile evidencing the presence of complex components and a high tendency to char formation. |
| first_indexed | 2024-03-09T16:45:56Z |
| format | Article |
| id | doaj.art-6ca1ce59d56f4f08b490ba686a7c75f8 |
| institution | Directory Open Access Journal |
| issn | 2311-5637 |
| language | English |
| last_indexed | 2024-03-09T16:45:56Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Fermentation |
| spelling | doaj.art-6ca1ce59d56f4f08b490ba686a7c75f82023-11-24T14:46:06ZengMDPI AGFermentation2311-56372022-12-0181274410.3390/fermentation8120744Valorization of Fourth-Range Wastes: Evaluating Pyrolytic Behavior of Fresh and Digested WastesElia Judith Martínez0Rubén González1Marcos Ellacuriaga2Xiomar Gómez3Department of Chemistry and Applied Physics, Chemical Engineering Area, University of León, Campus de Vegazana s/n, 24071 León, SpainDepartment of Electrical, Systems and Automatic Engineering, School of Industrial, Computer and Aeronautical Engineering, University of León, Campus de Vegazana, 24071 León, SpainDepartment of Chemistry and Applied Physics, Chemical Engineering Area, University of León, Campus de Vegazana s/n, 24071 León, SpainDepartment of Chemistry and Applied Physics, Chemical Engineering Area, University of León, Campus de Vegazana s/n, 24071 León, SpainChanges in daily habits and a stressful lifestyle create modifications in consumer preferences and open opportunities to new market products. This is the case of fourth-range products in which the industrial sector generates a waste stream of high quality. Valorization of this type of waste as a single stream is desirable to avoid lowering quality with other low-grade materials. Anaerobic digestion of fourth-range wastes was studied under discontinuous and semi-continuous conditions. A high carbon content characterizes the organic material composed of fruit and vegetable wastes. The fast degradation of the substrate indicated no limitations associated with the hydrolysis stage, as observed from kinetic parameters estimated from batch assays. However, the easiness of degradation did not translate into short hydraulic retention times when operating under semi-continuous conditions. Additionally, the insufficient amount of nutrients prevented the development of a well-balanced digestion process. Specific methane production was 325 mL CH<sub>4</sub>/g VS added at a hydraulic retention time of 30 days. However, solid accumulation was observed at the end of the experiment, indicating that conditions established did not allow for the complete conversion of the organic material. Digestate evaluation using thermal analysis under inert conditions showed a thermal profile evidencing the presence of complex components and a high tendency to char formation.https://www.mdpi.com/2311-5637/8/12/744valorizing fruit and vegetable wastedigestion performancefirst-order decay modeldigestate pyrolytic behavior |
| spellingShingle | Elia Judith Martínez Rubén González Marcos Ellacuriaga Xiomar Gómez Valorization of Fourth-Range Wastes: Evaluating Pyrolytic Behavior of Fresh and Digested Wastes Fermentation valorizing fruit and vegetable waste digestion performance first-order decay model digestate pyrolytic behavior |
| title | Valorization of Fourth-Range Wastes: Evaluating Pyrolytic Behavior of Fresh and Digested Wastes |
| title_full | Valorization of Fourth-Range Wastes: Evaluating Pyrolytic Behavior of Fresh and Digested Wastes |
| title_fullStr | Valorization of Fourth-Range Wastes: Evaluating Pyrolytic Behavior of Fresh and Digested Wastes |
| title_full_unstemmed | Valorization of Fourth-Range Wastes: Evaluating Pyrolytic Behavior of Fresh and Digested Wastes |
| title_short | Valorization of Fourth-Range Wastes: Evaluating Pyrolytic Behavior of Fresh and Digested Wastes |
| title_sort | valorization of fourth range wastes evaluating pyrolytic behavior of fresh and digested wastes |
| topic | valorizing fruit and vegetable waste digestion performance first-order decay model digestate pyrolytic behavior |
| url | https://www.mdpi.com/2311-5637/8/12/744 |
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