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

SYSNO ASEP	0520964
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Alkaline 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 Title	Journal of Applied Phycology. - : Springer - ISSN 0921-8971 Roč. 32, č. 1 (2020), s. 329-337
Number of pages	9 s.
Language	eng - English
Country	NL - Netherlands
Keywords	cyanobacteria ; inorganic precipitates ; surface interactions ; DLVO theory
Subject RIV	EI - Biotechnology ; Bionics
OECD category	Industrial biotechnology
Subject RIV - cooperation	Institute of Hydrodynamics - Water Pollution ; Quality
R&D Projects	GA18-05007S GA ČR - Czech Science Foundation (CSF)
Method of publishing	Limited access
Institutional support	UCHP-M - RVO:67985858 ; UH-J - RVO:67985874
UT WOS	000521187500028
EID SCOPUS	85075596156
DOI	10.1007/s10811-019-01941-3
Annotation	The 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.
Workplace	Institute of Chemical Process Fundamentals
Contact	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Year of Publishing	2021
Electronic address	http://hdl.handle.net/11104/0305633

Number of the records: 1