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Biogas Production from the Anaerobic Co-Digestion of Elephant Grass Juice and CattleWastewater: Batch and Semi-Continuous Performance in Anaerobic Reactors

2026-09Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
datacite.subject.fosEngenharia e Tecnologia::Outras Engenharias e Tecnologias
datacite.subject.sdg07:Energias Renováveis e Acessíveis
datacite.subject.sdg12:Produção e Consumo Sustentáveis
datacite.subject.sdg13:Ação Climática
dc.contributor.authorda Silva, Guilherme Henrique
dc.contributor.authorOtenio, Marcelo
dc.contributor.authorReis, Alberto
dc.contributor.authorMartins, Marcio
dc.contributor.authorBorges, Alisson
dc.contributor.authorLopes, Tiago
dc.contributor.authorRenato, Natalia
dc.date.accessioned2026-09-16T15:41:45Z
dc.date.available2026-09-16T15:41:45Z
dc.date.issued2026-09
dc.description.abstractABSTRACT: Considering the limited information available on the use of elephant grass juice (EGJ) as a liquid co-substrate, this study aimed to evaluate its feasibility and biogas production potential for anaerobic co-digestion with dairy cattle wastewater (DCW), focusing on substrate ratios and reactor operating conditions. Initially, batch tests were conducted at different temperatures to evaluate the effects of varying substrate mixture ratios (EGJ/DCW). In the reactor with 20% EGJ/80% DCW at 39 °C, a biogas volume of 414.35 mL was generated, which was considerably higher than that in the test at 25 °C, where 258.7 mL was generated over the 30-day experimental period. Greater efficiency in organic matter removal and other analyzed parameters was also observed under these conditions. The best configuration was selected for the semi-continuous tests. To this end, an Upflow Anaerobic Sludge Blanket (UASB) reactor was operated with hydraulic retention times of 10, 6, 2, and 1 d and volumetric organic loading rates of 2.06, 3.39, 10.40, and 20.70 kg VS m−3 d−1, respectively. Volatile solids were removed by 29–58%, with biogas yields ranging from 0.78 to 2.28 m3 m−3 d−1 and a maximum CH4 concentration of 72% (v/v). The co-digestion of the analyzed agricultural waste substrates proved to be a promising approach for bioenergy recovery. These results provide useful guidelines for optimizing co-digestion systems, improving reactor performance, and waste treatment processes.eng
dc.identifier.citationSilva, G., Otenio, M.., Reis, A.., Martins, M.., Borges, A.., Lopes, T.., & Renato, N. (2026). Biogas Production from the Anaerobic Co-Digestion of Elephant Grass Juice and Cattle Wastewater: Batch and Semi-Continuous Performance in Anaerobic Reactors. In: Energies, 2026, vol. 19( 17), article 4164. https://doi.org/10.3390/en19174164
dc.identifier.doi10.3390/en19174164
dc.identifier.issn1996-1073
dc.identifier.urihttp://hdl.handle.net/10400.9/6461
dc.language.isoeng
dc.peerreviewedyes
dc.publisherMDPI
dc.relationBiomass and Bioenergy Research Infrastructure
dc.relation.hasversionhttps://www.mdpi.com/1996-1073/19/17/4164
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectBioenergy
dc.subjectAnaerobic digestion
dc.subjectResidual energy
dc.subjectFermentation
dc.subjectLignocellulosic biomass
dc.titleBiogas Production from the Anaerobic Co-Digestion of Elephant Grass Juice and CattleWastewater: Batch and Semi-Continuous Performance in Anaerobic Reactorseng
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberPINFRA/22059/2016
oaire.awardTitleBiomass and Bioenergy Research Infrastructure
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/9444 - RNIIIE/PINFRA%2F22059%2F2016/PT
oaire.citation.issue17
oaire.citation.titleEnergies
oaire.citation.volume19
oaire.fundingStream9444 - RNIIIE
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameda Silva
person.familyNameOtenio
person.familyNameReis
person.familyNameMartins
person.familyNameBorges
person.familyNameLopes
person.familyNameRenato
person.givenNameGuilherme Henrique
person.givenNameMarcelo
person.givenNameAlberto
person.givenNameMarcio
person.givenNameAlisson
person.givenNameTiago
person.givenNameNatalia
person.identifier3095391
person.identifier.orcid0000-0003-0391-5276
person.identifier.orcid0000-0002-6157-7861
person.identifier.orcid0000-0002-1405-9981
person.identifier.orcid0000-0001-5705-9431
person.identifier.orcid0000-0002-9729-6439
person.identifier.orcid0000-0002-9720-8777
person.identifier.orcid0000-0001-6168-8257
person.identifier.ridC-1105-2017
person.identifier.ridE-8024-2010
person.identifier.scopus-author-id7402262320
person.identifier.scopus-author-id32367571200
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
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