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This study uses DSS from a biogas plant to produce bio-oil in a hydrothermal liquefaction process adjusting time from 2 to 6\u2009hours, temperature from 280 to 380\u00b0C and the presence of a base as a depolymerization agent and potential catalyst. High conversion yields are obtained, with the maximum of 58\u2009wt% on a dry, ash free basis and an energy recovery of up to 94%. The oils contain compounds with a potential for utilization as biofuels and building blocks, especially fatty acids as biodiesel feedstock and biobased phenols, glycols and aliphatic alcohols.<\/jats:p>","DOI":"10.1177\/0734242x221138497","type":"journal-article","created":{"date-parts":[[2022,11,19]],"date-time":"2022-11-19T07:27:06Z","timestamp":1668842826000},"page":"977-986","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":12,"title":["Hydrothermal liquefaction of sewage sludge anaerobic digestate for bio-oil production: Screening the effects of temperature, residence time and KOH catalyst"],"prefix":"10.1177","volume":"41","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3588-2731","authenticated-orcid":false,"given":"Stian Hersvik","family":"Hegdahl","sequence":"first","affiliation":[{"name":"Department of Chemistry, University of Bergen, Bergen, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Camilla","family":"L\u00f8hre","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Bergen, Bergen, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tanja","family":"Barth","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Bergen, Bergen, Norway"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"179","published-online":{"date-parts":[[2022,11,19]]},"reference":[{"key":"bibr1-0734242X221138497","unstructured":"Akervold K (2016) Bergen biogassanlegg \u2013 slambehandlingsanlegget i R\u00e5dalen. 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