Instantaneous and reversible flocculation of Scenedesmus via Chitosan and Xanthan Gum complexation.
Chitosan
Flocculation
Microalgal harvesting
Polyelectrolyte complexes
Xanthan gum
Journal
Bioresource technology
ISSN: 1873-2976
Titre abrégé: Bioresour Technol
Pays: England
ID NLM: 9889523
Informations de publication
Date de publication:
Dec 2023
Dec 2023
Historique:
received:
11
09
2023
revised:
18
10
2023
accepted:
18
10
2023
medline:
6
11
2023
pubmed:
22
10
2023
entrez:
21
10
2023
Statut:
ppublish
Résumé
An instantaneous and reversible flocculation method for Scenedesmus harvesting was developed, based on the complexation of Chitosan (CTS) and Xanthan Gum (XG). Under rapid stirring, Scenedesmus cells formed centimeter-sized flocs within 20 s using binary flocculants of 4 mg/L CTS and 16 mg/L XG. These flocs exhibited a remarkable harvest efficiency exceeding 95 % when filtered through 500-μm-pore-sized sieves. Furthermore, the flocs could be completely disintegrated by using alkaline or NaCl solutions (pH > 11 or NaCl concentration > 1.5 mol/L). Adjusting pH allowed recovery of 50 % CTS and 75 % XG, resulting in microalgae biomass with lower flocculant content and reducing reagent costs. Electrostatic interaction of -COO
Identifiants
pubmed: 37865151
pii: S0960-8524(23)01327-5
doi: 10.1016/j.biortech.2023.129899
pii:
doi:
Substances chimiques
Chitosan
9012-76-4
xanthan gum
TTV12P4NEE
Sodium Chloride
451W47IQ8X
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
129899Informations de copyright
Copyright © 2023. Published by Elsevier Ltd.
Déclaration de conflit d'intérêts
Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.