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Alkaline flocculation of Microcystis aeruginosa induced by calcium and magnesium precipitates.

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    SYSNO ASEP0520964
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleAlkaline flocculation of Microcystis aeruginosa induced by calcium and magnesium precipitates.
    Author(s) Potočár, T. (CZ)
    Pereira, J.A.V. (CZ)
    Brányiková, Irena (UCHP-M) RID, ORCID, SAI
    Barešová, Magdalena (UH-J) RID, ORCID, SAI
    Pivokonský, Martin (UH-J) SAI, ORCID, RID
    Brányik, T. (CZ)
    Source TitleJournal of Applied Phycology - ISSN 0921-8971
    Roč. 32, č. 1 (2020), s. 329-337
    Number of pages9 s.
    Languageeng - English
    CountryNL - Netherlands
    Keywordscyanobacteria ; inorganic precipitates ; surface interactions ; DLVO theory
    Subject RIVEI - Biotechnology ; Bionics
    OBOR OECDIndustrial biotechnology
    Subject RIV - cooperationInstitute of Hydrodynamics - Water Pollution ; Quality
    R&D ProjectsGA18-05007S GA ČR - Czech Science Foundation (CSF)
    Způsob publikováníOmezený přístup
    Institutional supportUCHP-M - RVO:67985858 ; UH-J - RVO:67985874
    UT WOS000521187500028
    EID SCOPUS85075596156
    AnnotationThe biotechnological potential of Microcystis aeruginosa brings requirements for efficient cultivation and harvesting of biomass. Flocculation of M. aeruginosa at alkaline pH induced by calcium or magnesium precipitates was studied under model conditions, in culture medium with/without cellular organic matter (COM). The effect of independent variables (Ca2+, Mg2+, PO43−, and pH) on the zeta potential and turbidity of cells and inorganic precipitates was quantified by response surface methodology. The experimentally obtained flocculation efficiencies (FEs) were compared with predictions of physicochemical interaction (DLVO) models. The results presented here delimited the concentration ranges of Ca2+, Mg2+, PO43−, and pH, resulting in FE > 85%. The DLVO prediction model suggested that for high FE, positively charged precipitates and sufficient precipitate turbidity were required. At pH 10, alkaline flocculation was more advantageous using magnesium precipitates, since it required less phosphate. High FE with COM was achieved at pH 12 when precipitate formation was induced at a low phosphate concentration by the addition of magnesium hydroxide.
    WorkplaceInstitute of Chemical Process Fundamentals
    ContactEva Jirsová,, Tel.: 220 390 227
    Year of Publishing2021
    Electronic address
Number of the records: 1