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Energy requirements for the continuous biohydrogen production from Spirogyra biomass in a sequential batch reactor

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dc.contributor.authorOrtigueira, Joana
dc.contributor.authorFerreira, Ana F.
dc.contributor.authorSilva, Carla M.
dc.contributor.authorGouveia, Luisa
dc.contributor.authorMoura, Patrícia
dc.date.accessioned2016-05-27T13:42:06Z
dc.date.available2016-05-27T13:42:06Z
dc.date.issued2015
dc.description.abstractThe current energy market requires urgent revision for the introduction of renewable, less-polluting and inexpensive energy sources. Biohydrogen (bioH2) is considered to be one of the most appropriate options for this model shift, being easily produced through the anaerobic fermentation of carbohydrate-containing biomass. Ideally, the feedstock should be low-cost, widely available and convertible into a product of interest. Microalgae are considered to possess the referred properties, being also highly valued for their capability to assimilate CO2 [1]. The microalga Spirogyra sp. is able to accumulate high concentrations of intracellular starch, a preferential carbon source for some bioH2 producing bacteria such as Clostridium butyricum [2]. In the present work, Spirogyra biomass was submitted to acid hydrolysis to degrade polymeric components and increase the biomass fermentability. Initial tests of bioH2 production in 120 mL reactors with C. butyricum yielded a maximum volumetric productivity of 141 mL H2/L.h and a H2 production yield of 3.78 mol H2/mol consumed sugars. Subsequently, a sequential batch reactor (SBR) was used for the continuous H2 production from Spirogyra hydrolysate. After 3 consecutive batches, the fermentation achieved a maximum volumetric productivity of 324 mL H2/L.h, higher than most results obtained in similar production systems [3] and a potential H2 production yield of 10.4 L H2/L hydrolysate per day. The H2 yield achieved in the SBR was 2.59 mol H2/mol, a value that is comparable to those attained with several thermophilic microorganisms [3], [4]. In the present work, a detailed energy consumption of the microalgae value-chain is presented and compared with previous results from the literature. The specific energy requirements were determined and the functional unit considered was gH2 and MJH2. It was possible to identify the process stages responsible for the highest energy consumption during bioH2 production from Spirogyra biomass for further optimisation.pt_PT
dc.identifier.citationOrtigueira, J.; Ferreira, A.; Silva, C.; Gouveia, L.; Moura, P. - Energy requirements for the continuous biohydrogen production from Spirogyra biomass in a sequential batch reactor. In: 2nd Discussion forum on Industrial Ecology and Life-Cycle Management, Coimbra, Portugal, 5-6 March, 2015, 5 p.pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.9/2978
dc.language.isoengpt_PT
dc.subjectBiohydrogenpt_PT
dc.subjectMicroalgaept_PT
dc.subjectLife cycle assessmentpt_PT
dc.subjectAnalysispt_PT
dc.titleEnergy requirements for the continuous biohydrogen production from Spirogyra biomass in a sequential batch reactorpt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.citation.conferencePlaceCoimbra, Portugalpt_PT
oaire.citation.title2nd Discussion forum on Industrial Ecology and Life-Cycle Managementpt_PT
person.familyNameOrtigueira
person.familyNameGouveia
person.familyNameMoura
person.givenNameJoana
person.givenNameLuisa
person.givenNamePatrícia
person.identifierH-4046-2011
person.identifier.ciencia-id9611-FC1A-69AE
person.identifier.ciencia-id581B-924A-84DD
person.identifier.ciencia-idBA17-3D3E-5478
person.identifier.orcid0000-0003-0170-5312
person.identifier.orcid0000-0003-0196-6360
person.identifier.orcid0000-0001-9333-3231
person.identifier.ridE-5664-2016
person.identifier.ridA-8330-2015
person.identifier.scopus-author-id7004135834
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication0405bd5d-439d-47bd-a7bf-68284cecb689
relation.isAuthorOfPublication63dcbe08-14df-4886-98b7-2945cbe0e062
relation.isAuthorOfPublicationb0ec9a1e-8b38-48e2-a76b-a09e13975dcf
relation.isAuthorOfPublication.latestForDiscoveryb0ec9a1e-8b38-48e2-a76b-a09e13975dcf

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