Hydrothermal treatment of residual forest wood (softwood) and digestate from anaerobic digestion - influence of temperature and holding time on the characteristics of the solid and liquid products

dc.contributor.authorSailer, Gregor
dc.contributor.authorComi, Julian
dc.contributor.authorEmpl, Florian
dc.contributor.authorSilberhorn, Martin
dc.contributor.authorHeymann, Valeska
dc.contributor.authorBosilj, Monika
dc.contributor.authorOuardi, Siham
dc.contributor.authorPelz, Stefan
dc.contributor.authorMüller, Joachim
dc.date.accessioned2024-10-23T12:25:44Z
dc.date.available2024-10-23T12:25:44Z
dc.date.issued2022de
dc.description.abstractHydrothermal treatment (HTT) offers the potential to upgrade low-value biomass such as digestate (DG) or forest residue (FR) by producing solids and liquids for material use or energetic utilization. In this study, microwave-assisted HTT experiments with DG and FR as feedstocks were executed at different temperatures (130, 150, 170 °C) and with different holding times (30, 60, 90 min) to determine the influences on product properties (ash and elemental concentrations, calorific values and chemical compounds). In general, DG and FR reacted differently to HTT. For the DG solids, for instance, the ash concentration was reduced to 8.68%DM at 130 °C (initially 27.67%DM), and the higher heating value increased from 16.55 MJ/kgDM to 20.82 MJ/kgDM at 170 °C, while the FR solids were affected only marginally. Elements with importance for emissions in combustion were leached out in both HTT solids. The DG and FR liquids contained different chemical compounds, and the temperature or holding time affected their formation. Depending on the designated application of HTT, less severe conditions can deliver better results. It was demonstrated that different low-temperature HTT conditions already induce strong changes in the product qualities of DG and FR. Optimized interactions between process parameters (temperature, holding time and feedstock) might lead to better cost–benefit effects in HTT.en
dc.identifier.swb1804075906
dc.identifier.urihttps://hohpublica.uni-hohenheim.de/handle/123456789/16782
dc.identifier.urihttps://doi.org/10.3390/en15103738
dc.language.isoengde
dc.rights.licensecc_byde
dc.source1996-1073de
dc.sourceEnergies; Vol. 15, No. 10 (2022) 3738de
dc.subjectWaste materials
dc.subjectHTC
dc.subjectMicrowave-assisted hydrothermal carbonization (MAHC)
dc.subjectPhysicochemical characterization
dc.subjectTrace elements
dc.subjectChemical compounds
dc.subjectICP-OES
dc.subjectGC-MS
dc.subject.ddc630
dc.titleHydrothermal treatment of residual forest wood (softwood) and digestate from anaerobic digestion - influence of temperature and holding time on the characteristics of the solid and liquid productsen
dc.type.diniArticle
dcterms.bibliographicCitationEnergies, 15 (2022), 10, 3738. https://doi.org/10.3390/en15103738. ISSN: 1996-1073
dcterms.bibliographicCitation.issn1996-1073
dcterms.bibliographicCitation.issue10
dcterms.bibliographicCitation.journaltitleEnergies
dcterms.bibliographicCitation.volume15
local.export.bibtex@article{Sailer2022, url = {https://hohpublica.uni-hohenheim.de/handle/123456789/16782}, doi = {10.3390/en15103738}, author = {Sailer, Gregor and Comi, Julian and Empl, Florian et al.}, title = {Hydrothermal Treatment of Residual Forest Wood (Softwood) and Digestate from Anaerobic Digestion—Influence of Temperature and Holding Time on the Characteristics of the Solid and Liquid Products}, journal = {Energies}, year = {2022}, volume = {15}, number = {10}, }
local.export.bibtexAuthorSailer, Gregor and Comi, Julian and Empl, Florian et al.
local.export.bibtexKeySailer2022
local.export.bibtexType@article
local.title.fullHydrothermal treatment of residual forest wood (softwood) and digestate from anaerobic digestion - influence of temperature and holding time on the characteristics of the solid and liquid products

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