Evaluation of co-culturing a diatom and a coccolithophore using different silicate concentrations

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dc.authorid0000-0002-0278-8503
dc.contributor.authorDoğdu Okçu, Gamze
dc.contributor.authorEustance, Everett
dc.contributor.authorLai, Yenjung Sean
dc.contributor.authorRittmann, Bruce E.
dc.date.accessioned2021-06-23T18:57:00Z
dc.date.available2021-06-23T18:57:00Z
dc.date.issued2021
dc.departmentBAİBÜ, Mühendislik Fakültesi, Çevre Mühendisliği Bölümüen_US
dc.description.abstractGlobally, the demand for sustainable energy production and high-value biological compounds have become intertwined in an attempt to improve the feasibility of sustainable algal cultivation. Marine microalgae, especially diatoms and coccolithophores, represent viable cultures that can produce biofuels and high-value compounds. Growing them in co-culture offers the potential to produce lipids and pigments, while also generating CaCO3 for C sequestration. The main objective of this work was to investigate competition or co-existence of the diatom Chaetoceros gracilis and the coccolithophore Pleurochrysis Carterae. The focus was on the effects of silicate and co-culturing on the growth rate, productivity, pigment production, and ash production for C. gracilis and P. carterae in laboratory conditions. The results showed that, in monoculture, 2-mM Si enhanced the specific growth rate of C. gracilis, but did not affect P. carterae. Regardless of silicate concentration, C. gracilis was more productive than P. carterae. In co-culture, P. carterae had a slower growth rate, indicating an inhibitory effect of C. gracilis on P. carterae. Neither silicate concentration nor co-culturing had an impact on the contents of pigments fucoxanthin, chlorophyll-a, and chlorophyll-c, which means that pigment productivity was proportional to biomass productivity. Finally, the ash content increased in all cultures with the lower silicate concentration (0.2 mM) in the medium. With one exception, the ash content was dominated by SiO2 regardless of silicate amount, and CaCO3 was a major part of the ash only when P. carterae was grown separately with the higher silicate level. These results highlight that co-culturing did not provide an advantage for improving biomass, pigments, or CaCO3 productivity.en_US
dc.description.sponsorshipTürkiye Bilimsel ve Teknolojik Araştirma Kurumu, TÜBITAKen_US
dc.description.sponsorshipThe first author would like to thank The Scientific and Technological Research Council of Turkey (TUBITAK) Science Fellowships and Grant Programmes Department for the Post-Doctoral Research given to Gamze Dogdu Okcu within “2219-Post-Doctoral Post-Fellowship Scholarship Program”.en_US
dc.identifier.doi10.1016/j.scitotenv.2021.145217
dc.identifier.issn0048-9697
dc.identifier.pmid33493907en_US
dc.identifier.scopus2-s2.0-85099652001en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.scitotenv.2021.145217
dc.identifier.urihttps://hdl.handle.net/20.500.12491/5115
dc.identifier.volume769en_US
dc.identifier.wosWOS:000626618100124en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.institutionauthorDoğdu Okçu, Gamze
dc.language.isoenen_US
dc.publisherElsevier B.V.en_US
dc.relation.ispartofScience of the Total Environmenten_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectCalcium Carbonateen_US
dc.subjectChaetoceros Gracilisen_US
dc.subjectCo-Cultureen_US
dc.subjectPleurochrysis Carteraeen_US
dc.subjectSilicateen_US
dc.titleEvaluation of co-culturing a diatom and a coccolithophore using different silicate concentrationsen_US
dc.typeArticleen_US

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