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Anaerobic digestion of stillage to produce bioenergy in the sugarcane-to-ethanol industry

dc.contributor.authorFuess, Lucas Tadeu [UNESP]
dc.contributor.authorGarcia, Marcelo Loureiro [UNESP]
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-27T11:30:43Z
dc.date.available2014-05-27T11:30:43Z
dc.date.issued2013-09-20
dc.description.abstractStillage is the main wastewater from ethanol production, containing a high chemical oxygen demand in addition to acidic and corrosive characteristics. Though stillage may be used as a soil fertilizer, its land application may be considered problematic due its high polluting potential. Anaerobic digestion represents an effective alternative treatment to reduce the pollution load of stillage. In addition, the methane gas produced within the process may be converted to energy, which can be directly applied to the treatment plant. The objective of this paper was to investigate the energetic potential of anaerobic digestion applied to stillage in the sugarcane ethanol industry. An overall analysis of the results indicates energy recovery capacity (ERC) values for methane ranging from 3.5% to 10%, respectively, for sugarcane juice and molasses. The processes employed to obtain the fermentable broth, as well as the distillation step, represent the main limiting factors to the energetic potential feasibility. Considering financial aspects the annual savings could reach up to US$ 30 million due to anaerobic digestion of stillage in relatively large-scale distilleries (365,000 m3 of ethanol per year). The best scenarios were verified for the association between anaerobic digestion of stillage and combustion of bagasse. In this case, the fossil fuels consumption in distilleries could be fully ceased, such the ERC of methane could reach values ranging from 140% to 890%. © 2013 Taylor & Francis.en
dc.identifierhttp://dx.doi.org/10.1080/09593330.2013.827745
dc.identifier.citationEnvironmental Technology (United Kingdom).
dc.identifier.doi10.1080/09593330.2013.827745
dc.identifier.issn0959-3330
dc.identifier.issn1479-487X
dc.identifier.lattes4801145654206305
dc.identifier.orcid0000-0002-6002-3840
dc.identifier.scopus2-s2.0-84884190747
dc.identifier.urihttp://hdl.handle.net/11449/76607
dc.identifier.wosWOS:000328475200010
dc.language.isoeng
dc.relation.ispartofEnvironmental Technology (United Kingdom)
dc.relation.ispartofjcr1.666
dc.relation.ispartofsjr0,503
dc.rights.accessRightsAcesso restrito
dc.sourceScopus
dc.subjectanaerobic digestion
dc.subjectenergy recovery
dc.subjectethanol production
dc.subjectmethane
dc.subjectstillage
dc.titleAnaerobic digestion of stillage to produce bioenergy in the sugarcane-to-ethanol industryen
dc.typeArtigo
dcterms.licensehttp://journalauthors.tandf.co.uk/permissions/reusingOwnWork.asp
unesp.author.lattes4801145654206305[2]
unesp.author.orcid0000-0002-6002-3840[2]

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