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Bioremediation of piggery effluents using Scenedesmus Obliquus microalga [Resumo]

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dc.contributor.authorBatista, Ana Paula
dc.contributor.authorMirón, Vicente
dc.contributor.authorRibeiro, Belina
dc.contributor.authorSilva, Teresa Lopes da
dc.contributor.authorBarragán, Blanca E.
dc.contributor.authorGouveia, Luisa
dc.contributor.authorMarques, Isabel Paula
dc.date.accessioned2016-06-01T12:14:37Z
dc.date.available2016-06-01T12:14:37Z
dc.date.issued2015
dc.description.abstractEffluents from intensive pig farms present high nutrient concentration, mainly ammonium, contributing to water eutrophication and pollution. Microalgae ability to deplete inorganic nutrients makes them an efficient effluent bioremediation tool. Scenedesmus obliquus was grown in piggery effluent (without any pretreatment) diluted with tap water at 5%v/v (187±25mg/L N-NH4+) and compared with growth in synthetic Bristol media. A 21-days trial was performed in 1L bubble-column reactors illuminated by fluorescent and LED lamps(3klux). Microalgae growth was monitored through OD540nm, dry weight and Chlorophyll content and also by flow cytometry in terms of autofluorescence read in FL3 channel (>670 nm), cell size (FSC), internal complexity (SSC) and cell membrane integrity (PI). S. obliquus cells have grown slower in pig effluent (mmax=0.13-19d-1) than in Bristol media (mmax=0.46-0.50d-1) although after 15 days the biomass productivity observed for the pig waste cultivation, operated under LED (0.127gL-1d-1) was similar to those attained for the Bristol media after 8 and 12 days (0.130 and 0.129 gL-1d-1 using Fluorescent and LED lights, respectively). The Chlorophyll content was correlated to FL3 autofluorescence, with R2>0.97 for Bristol and R2>0.92 for pig waste cultures. Regarding cell size and complexity, Bristol cultures did not show significant differences along time, while cells grown on pig waste increased, attaining FSC and SSC values similar to those observed for Bristol cultures. However, pig waste led to higher percentage of cells with permeabilised membrane (up to 18%) than Bristol cultures (7%). For pig waste experiments, ammonium removal rates were 95% with final values within legal limits. S. obliquus cultivations proved to be an efficient system for direct piggery effluent bioremediation, attaining biomass productivities similar to those obtained in synthetic media. Using LED lighting enables to reduce the energy consumption while maintaining microalgae growth and bioremediation performance. Scale-up to an outdoor 150L photobioreactor is underway.pt_PT
dc.identifier.citationBatista, A.P.; Mirón, V.; Ribeiro, B. [et.al.]. -Bioremediation of piggery effluents using Scenedesmus Obliquus microalga. In: CLABA: Congreso Latinoamericano Biotecnologia Algal, Book of Abstracts, Viña del Mar, Chile, 25-29 October, 2015.pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.9/2993
dc.language.isoengpt_PT
dc.relationEU FP7 Project LIFE2010ENV/IT/308pt_PT
dc.subjectMicroalgaept_PT
dc.subjectScenedesmus obliquuspt_PT
dc.subjectBioremediationpt_PT
dc.subjectPiggery effluentpt_PT
dc.titleBioremediation of piggery effluents using Scenedesmus Obliquus microalga [Resumo]pt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBPD%2F84812%2F2012/PT
oaire.citation.conferencePlaceViña del Mar, Chilept_PT
oaire.citation.titleCLABA: Congreso Latinoamericano Biotecnologia Algalpt_PT
oaire.fundingStreamSFRH
person.familyNameRibeiro
person.familyNameSaraiva Lopes da Silva
person.familyNameGouveia
person.familyNameIsabel
person.givenNameBelina
person.givenNameMaria Teresa
person.givenNameLuisa
person.givenNameMarques
person.identifierH-4046-2011
person.identifier.ciencia-idFB14-8F56-51E6
person.identifier.ciencia-id581B-924A-84DD
person.identifier.ciencia-idD012-2542-2868
person.identifier.orcid0000-0001-5145-2486
person.identifier.orcid0000-0003-4365-8868
person.identifier.orcid0000-0003-0196-6360
person.identifier.orcid0000-0003-4607-2723
person.identifier.ridI-7291-2017
person.identifier.scopus-author-id7004135834
person.identifier.scopus-author-id7003361809
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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