Impact of thermo-mechanical pretreatment of sargassum muticum on anaerobic co-digestion with wheat straw

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dc.contributor.authorHütter, Miriam
dc.contributor.authorSailer, Gregor
dc.contributor.authorHülsemann, Benedikt
dc.contributor.authorMüller, Joachim
dc.contributor.authorPoetsch, Jens
dc.date.accessioned2024-09-03T07:30:29Z
dc.date.available2024-09-03T07:30:29Z
dc.date.issued2023de
dc.description.abstractSargassum muticum (SM) is an invasive macroalgal species seasonally occurring in large quantities. While generally suitable for anaerobic digestion, recent studies resulted in low specific methane yields (SMYs), presumably due to salt, polyphenol, and high fiber contents of this marine biomass. In this study, the specific biogas yield (SBY) and SMY of SM alone as well as in co-digestion with wheat straw (WS) were investigated in batch tests at process temperatures of 44 ± 1.4 °C with a retention time of approx. 40 d. The pretreatment variants of SM were examined with regard to desalination and disintegration to potentially improve digestibility and to enhance the overall performance in anaerobic digestion. A sole mechanical treatment (pressing) and a thermo-mechanical treatment (heating and pressing) were tested. Batch assays showed that pressing increased the SMY by 15.1% whereas heating and pressing decreased the SMY by 15.7% compared to the untreated variant (87.64 ± 8.72 mL/gVS). Both anaerobic digestion experiments generally showed that co-digestion with WS can be recommended for SM, but the observed SBY and SMY were still similar to those of other studies in which SM was not pretreated. The mechanical pretreatment of SM, however, offers the potential to enhance the SMY in the anaerobic digestion of SM with WS, but further research is necessary to identify the optimum upgrading approaches since the overall SMY of SM is relatively low compared to other substrates that are commonly used in anaerobic digestion. In addition to anaerobic digestion, SM as an already available biomass could also be of interest for further utilization approaches such as fiber production.en
dc.identifier.urihttps://hohpublica.uni-hohenheim.de/handle/123456789/16203
dc.identifier.urihttps://doi.org/10.3390/fermentation9090820
dc.language.isoengde
dc.rights.licensecc_byde
dc.source2311-5637de
dc.sourceFermentation; Vol. 9, No. 9 (2023) 820de
dc.subjectBrown macroalgae
dc.subjectMarine biomass
dc.subjectPretreatment
dc.subjectBiogas production
dc.subjectMethane yield
dc.subjectSustainable biomass utilization
dc.subject.ddc620
dc.titleImpact of thermo-mechanical pretreatment of sargassum muticum on anaerobic co-digestion with wheat strawen
dc.type.diniArticle
dcterms.bibliographicCitationFermentation, 9 (2023), 9, 820. https://doi.org/10.3390/fermentation9090820. ISSN: 2311-5637
dcterms.bibliographicCitation.issn2311-5637
dcterms.bibliographicCitation.issue9
dcterms.bibliographicCitation.journaltitleFermentation
dcterms.bibliographicCitation.volume9
local.export.bibtex@article{Hütter2023, url = {https://hohpublica.uni-hohenheim.de/handle/123456789/16203}, doi = {10.3390/fermentation9090820}, author = {Hütter, Miriam and Sailer, Gregor and Hülsemann, Benedikt et al.}, title = {Impact of Thermo-Mechanical Pretreatment of Sargassum muticum on Anaerobic Co-Digestion with Wheat Straw}, journal = {Fermentation}, year = {2023}, volume = {9}, number = {9}, }
local.export.bibtexAuthorHütter, Miriam and Sailer, Gregor and Hülsemann, Benedikt et al.
local.export.bibtexKeyHütter2023
local.export.bibtexType@article

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