{"type": "FeatureCollection", "features": [{"id": "10.1007/s12649-020-01023-3", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:15:18Z", "type": "Journal Article", "created": "2020-03-26", "title": "A Multiproduct Biorefinery Approach for the Production of Hydrogen, Methane and Volatile Fatty Acids from Agricultural Waste", "description": "Abstract<p>A pilot scale biorefinery platform for the treatment of agro-waste and the production of hydrogen, methane and volatile fatty acids was studied in real environment. The system adopted was a two stage anaerobic process where hydrogen and volatile fatty acids were produced in the first phase (fermentation) and methane in the second one (digestion). The study demonstrated the possibility to produce a biogas composed by hydrogen and methane (10% and 55%, respectively) while recovering volatile fatty acids. The yield for acids production was equivalent to 0.13\uffc2\uffa0gVFA/gTVS (as COD) with acetate and butyrate as dominant observed species.</p>Graphic Abstra", "keywords": ["Horizon 2020", "Environmental Engineering", "Circular economy", "Renewable Energy", " Sustainability and the Environment", "Polyhydroxyalkanoates", "7. Clean energy", "01 natural sciences", "6. Clean water", "Biorefinery", "12. Responsible consumption", "Bio-economy", "Bioresource recovery", "Euratom", "13. Climate action", "Volatile fatty acids", "European Union (EU)", "Waste Management and Disposal", "Agricultural waste", "0105 earth and related environmental sciences"]}, "links": [{"href": "http://link.springer.com/content/pdf/10.1007/s12649-020-01023-3.pdf"}, {"href": "https://doi.org/10.1007/s12649-020-01023-3"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Waste%20and%20Biomass%20Valorization", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s12649-020-01023-3", "name": "item", "description": "10.1007/s12649-020-01023-3", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s12649-020-01023-3"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-03-26T00:00:00Z"}}, {"id": "10.1007/s13762-019-02264-z", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:15:20Z", "type": "Journal Article", "created": "2019-02-12", "title": "High-solids anaerobic digestion requires a trade-off between total solids, inoculum-to-substrate ratio and ammonia inhibition", "description": "Increasing total solids in anaerobic digestion can reduce the methane yield by highly complex bio-physical\u2013chemical mechanisms. Therefore, understanding those mechanisms and their main drivers becomes crucial to optimize this waste treatment biotechnology. In this study, seven batch experiments were conducted to investigate the effects of increasing the initial total solids in high-solids anaerobic digestion of the organic fraction of municipal solid waste. With inoculum-to-substrate ratio\u2009=\u20091.5 g VS/g VS and maximum total solids \u2264\u200919.6%, mono-digestion of the organic fraction of municipal solid waste showed a methane yield\u2009=\u2009174\u2013236 NmL CH4/g VS. With inoculum-to-substrate ratio \u2264\u20091.0 g VS/g VS and maximum total solids \u2265\u200924.0%, mono-digestion experiments acidified. Co-digestion of the organic fraction of municipal solid waste and beech sawdust permitted to reduce the inoculum-to-substrate ratio to 0.16 g VS/g VS while increasing total solids up to 30.2%, though achieving a lower methane yield (117\u2013156 NmL CH4/g VS). At each inoculum-to-substrate ratio, higher total solids corresponded to higher ammonia and volatile fatty acid accumulation. Thus, a 40% lower methane yield for mono-digestion was observed at a NH3 concentration \u2265\u20092.3 g N\u2013NH3/kg reactor content and total solids\u2009=\u200915.0%. Meanwhile, co-digestion lowered the nitrogen content, being the risk of acidification exacerbated only at total solids \u2265\u200920.0%. Therefore, the biodegradability of the substrate, as well as the operational total solids and inoculum-to-substrate ratio, are closely interrelated parameters determining the success of methanogenesis, but also the risk of ammonia inhibition in high-solids anaerobic digestion.", "keywords": ["Environmental Engineering", "[SDE.IE]Environmental Sciences/Environmental Engineering", "Organic fraction of municipal solid waste", "0211 other engineering and technologies", "500", "High-solids anaerobic digestion", "02 engineering and technology", "Co-digestion", "01 natural sciences", "7. Clean energy", "6. Clean water", "12. Responsible consumption", "Agricultural and Biological Sciences (all)", "Thermophilic", "13. Climate action", "Batch experiments", "11. Sustainability", "Environmental Chemistry", "Volatile fatty acids", "[SDE.IE] Environmental Sciences/Environmental Engineering", "Batch experiments; Co-digestion; High-solids anaerobic digestion; Methane yield; Organic fraction of municipal solid waste; Thermophilic; Volatile fatty acids; Environmental Engineering; Environmental Chemistry; Agricultural and Biological Sciences (all)", "Methane yield", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://www.iris.unina.it/bitstream/11588/743139/1/Batch%20Manuscript%20last%20for%20IRIS.pdf"}, {"href": "http://link.springer.com/content/pdf/10.1007/s13762-019-02264-z.pdf"}, {"href": "https://hal.inrae.fr/hal-02961893/file/Batch%20Manuscript_revf.pdf"}, {"href": "https://doi.org/10.1007/s13762-019-02264-z"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/International%20Journal%20of%20Environmental%20Science%20and%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s13762-019-02264-z", "name": "item", "description": "10.1007/s13762-019-02264-z", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s13762-019-02264-z"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-02-12T00:00:00Z"}}, {"id": "10.1016/j.ijbiomac.2018.12.270", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-29T16:16:32Z", "type": "Journal Article", "created": "2019-01-03", "title": "Improving polyhydroxyalkanoates production in phototrophic mixed cultures by optimizing accumulator reactor operating conditions", "description": "Open AccessPolyhydroxyalkanoates (PHAs) production with phototrophic mixed cultures (PMCs) has been recently proposed. These cultures can be selected under the permanent presence of carbon and the PHA production can be enhanced in subsequent accumulation steps. To optimize the PHA production in accumulator reactors, this work evaluated the impact of 1) initial acetate concentration, 2) light intensity, 3) removal of residual nitrogen on the culture performance. Results indicate that low acetate concentration (&lt;30CmM) and specific light intensities around 20W/gX are optimal operating conditions that lead to high polyhydroxybutyrate (PHB) storage yields (0.83+-0.07 Cmol-PHB/Cmol-Acet) and specific PHB production rates of 2.21+-0.07 Cmol-PHB/Cmol X d. This rate is three times higher than previously registered in non-optimized accumulation tests and enabled a PHA content increase from 15 to 30% in less than 4h. Also, it was shown for the first time, the capability of a PMC to use a real waste, fermented cheese whey, to produce PHA with a hydroxyvalerate (HV) content of 12%. These results confirm that fermented wastes can be used as substrates for PHA production with PMCs and that the energy levels in sunlight that lead to specific light intensities from 10 to 20W/gX are sufficient to drive phototrophic PHA production processes.", "keywords": ["0106 biological sciences", "1303 Biochemistry", "Light", "Nitrogen", "Polyhydroxyalkanoates (PHA)", "Fermented cheese whey (FCW)", "Phototrophic mixed cultures (PMCs)", "Acetates", "7. Clean energy", "01 natural sciences", "1315 Structural Biology", "Bioreactors", "Cheese", "Whey", "1312 Molecular Biology", "0105 earth and related environmental sciences", "Polyhydroxyalkanoates", "Volatile fatty acids (VFAs)", "Other Quantitative Biology (q-bio.OT)", "Quantitative Biology - Other Quantitative Biology", "Purple phototrophic bacteria (PPB)", "Kinetics", "Phototrophic Processes", "13. 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