Energy Valorisation of Fucus serratus via the Integration of Hydrothermal Carbonisation and Anaerobic Digestion: Influence of Seawater as a Reactant Medium.
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| Title: | Energy Valorisation of Fucus serratus via the Integration of Hydrothermal Carbonisation and Anaerobic Digestion: Influence of Seawater as a Reactant Medium. |
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| Authors: | Brown, Aaron E.1,2 (AUTHOR), Adams, Jessica M. M.2,3 (AUTHOR), Camargo-Valero, Miller Alonso2,3,4 (AUTHOR), Ross, Andrew B.1,4 (AUTHOR) a.b.ross@leeds.ac.uk |
| Source: | Energies (19961073). Apr2026, Vol. 19 Issue 7, p1699. 19p. |
| Subject Terms: | *Hydrothermal carbonization, *Seawater, *Anaerobic metabolism, *Marine algae, *Biomass energy, *Energy conversion, *Renewable natural gas, *Biochar |
| Abstract: | Integrating hydrothermal carbonization (HTC) and anaerobic digestion (AD) has the potential to improve energy conversion efficiency (ECE) of biomass with low energy density and high moisture content. This study aims to assess the influence of alkali metals and chlorides by comparing seawater and distilled water as a HTC reactant medium, treating Fucus serratus across a range of processing temperatures (150 °C, 200 °C and 250 °C). All HTC-AD integration options improved ECE of F. serratus compared to AD alone. ECE of F. serratus was similar across temperatures of 150 °C (84–88%) and 200 °C (75–77%) regardless of seawater or distilled water usage. However, HTC processing at 250 °C yielded a greater ECE from F. serratus using distilled water (78%), compared to seawater (57%), due to a higher hydrochar yield and biomethane generation from the process water. Higher HTC processing temperatures significantly reduced slagging and fouling propensity of hydrochars by selectively removing problematic alkali metals. This creates a compromise between process energetics and favourability of hydrochar properties in large-scale conversion systems. Overall, HTC of F. serratus in seawater at 250 °C produces hydrochar suitable for combustion, process water that generates biomethane during AD (168.4 mL CH4/g COD) and a net energy-positive process (energy return on energy investment EROI = 1.53). [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 192959103 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Energy Valorisation of Fucus serratus via the Integration of Hydrothermal Carbonisation and Anaerobic Digestion: Influence of Seawater as a Reactant Medium. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Brown%2C+Aaron+E%2E%22">Brown, Aaron E.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Adams%2C+Jessica+M%2E+M%2E%22">Adams, Jessica M. M.</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Camargo-Valero%2C+Miller+Alonso%22">Camargo-Valero, Miller Alonso</searchLink><relatesTo>2,3,4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ross%2C+Andrew+B%2E%22">Ross, Andrew B.</searchLink><relatesTo>1,4</relatesTo> (AUTHOR)<i> a.b.ross@leeds.ac.uk</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Energies+%2819961073%29%22">Energies (19961073)</searchLink>. Apr2026, Vol. 19 Issue 7, p1699. 19p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Hydrothermal+carbonization%22">Hydrothermal carbonization</searchLink><br />*<searchLink fieldCode="DE" term="%22Seawater%22">Seawater</searchLink><br />*<searchLink fieldCode="DE" term="%22Anaerobic+metabolism%22">Anaerobic metabolism</searchLink><br />*<searchLink fieldCode="DE" term="%22Marine+algae%22">Marine algae</searchLink><br />*<searchLink fieldCode="DE" term="%22Biomass+energy%22">Biomass energy</searchLink><br />*<searchLink fieldCode="DE" term="%22Energy+conversion%22">Energy conversion</searchLink><br />*<searchLink fieldCode="DE" term="%22Renewable+natural+gas%22">Renewable natural gas</searchLink><br />*<searchLink fieldCode="DE" term="%22Biochar%22">Biochar</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Integrating hydrothermal carbonization (HTC) and anaerobic digestion (AD) has the potential to improve energy conversion efficiency (ECE) of biomass with low energy density and high moisture content. This study aims to assess the influence of alkali metals and chlorides by comparing seawater and distilled water as a HTC reactant medium, treating Fucus serratus across a range of processing temperatures (150 °C, 200 °C and 250 °C). All HTC-AD integration options improved ECE of F. serratus compared to AD alone. ECE of F. serratus was similar across temperatures of 150 °C (84–88%) and 200 °C (75–77%) regardless of seawater or distilled water usage. However, HTC processing at 250 °C yielded a greater ECE from F. serratus using distilled water (78%), compared to seawater (57%), due to a higher hydrochar yield and biomethane generation from the process water. Higher HTC processing temperatures significantly reduced slagging and fouling propensity of hydrochars by selectively removing problematic alkali metals. This creates a compromise between process energetics and favourability of hydrochar properties in large-scale conversion systems. Overall, HTC of F. serratus in seawater at 250 °C produces hydrochar suitable for combustion, process water that generates biomethane during AD (168.4 mL CH4/g COD) and a net energy-positive process (energy return on energy investment EROI = 1.53). [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=192959103 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/en19071699 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 19 StartPage: 1699 Subjects: – SubjectFull: Hydrothermal carbonization Type: general – SubjectFull: Seawater Type: general – SubjectFull: Anaerobic metabolism Type: general – SubjectFull: Marine algae Type: general – SubjectFull: Biomass energy Type: general – SubjectFull: Energy conversion Type: general – SubjectFull: Renewable natural gas Type: general – SubjectFull: Biochar Type: general Titles: – TitleFull: Energy Valorisation of Fucus serratus via the Integration of Hydrothermal Carbonisation and Anaerobic Digestion: Influence of Seawater as a Reactant Medium. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Brown, Aaron E. – PersonEntity: Name: NameFull: Adams, Jessica M. M. – PersonEntity: Name: NameFull: Camargo-Valero, Miller Alonso – PersonEntity: Name: NameFull: Ross, Andrew B. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 04 Text: Apr2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 19961073 Numbering: – Type: volume Value: 19 – Type: issue Value: 7 Titles: – TitleFull: Energies (19961073) Type: main |
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