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Time-Resolved Kinetic Measurement of Microalgae Agglomeration for Screening of Polysaccharides-Based Coagulants/Flocculants

Time-resolved monitoring of microalgae agglomeration facilitates screening of coagulants/flocculants (CFs) from numerous biopolymer candidates. Herein, a filtering-flowing analysis (FFA) apparatus was developed in which dispersed microalgal cells were separated from coagulates and flocs formed by CF...

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Autores principales: Zhou, Jinxia, Jia, Yunlu, Gong, Xiaobei, Liu, Hao, Sun, Chengwu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9657197/
https://www.ncbi.nlm.nih.gov/pubmed/36361487
http://dx.doi.org/10.3390/ijerph192114610
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author Zhou, Jinxia
Jia, Yunlu
Gong, Xiaobei
Liu, Hao
Sun, Chengwu
author_facet Zhou, Jinxia
Jia, Yunlu
Gong, Xiaobei
Liu, Hao
Sun, Chengwu
author_sort Zhou, Jinxia
collection PubMed
description Time-resolved monitoring of microalgae agglomeration facilitates screening of coagulants/flocculants (CFs) from numerous biopolymer candidates. Herein, a filtering-flowing analysis (FFA) apparatus was developed in which dispersed microalgal cells were separated from coagulates and flocs formed by CFs and pumped into spectrophotometer for real-time quantification. Polysaccharides-based CFs for Microcystis aeruginosa and several other microalgae were tested. Cationic hydroxyethyl cellulose (CHEC), chitosan quaternary ammonium (CQA) and cationic guar gum (CGG) all triggered coagulation obeying a pseudo-second-order model. Maximal coagulation efficiencies were achieved at their respective critical dosages, i.e., 0.086 g/g(M.a.) CHEC, 0.022 g/g(M.a.) CQA, and 0.216 g/g(M.a.) CGG. Although not active independently, bacterial exopolysaccharides (BEPS) aided coagulation of M. aeruginosa and allowed near 100% flocculation efficiency when 0.115 g/g(M.a.) CQA and 1.44 g/g(M.a.) xanthan were applied simultaneously. The apparatus is applicable to other microalgae species including Spirulina platensis, S. maxima, Chlorella vulgaris and Isochrysis galbana. Bio-based CFs sorted out using this apparatus could help develop cleaner processes for both remediation of harmful cyanobacterial blooms and microalgae-based biorefineries.
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spelling pubmed-96571972022-11-15 Time-Resolved Kinetic Measurement of Microalgae Agglomeration for Screening of Polysaccharides-Based Coagulants/Flocculants Zhou, Jinxia Jia, Yunlu Gong, Xiaobei Liu, Hao Sun, Chengwu Int J Environ Res Public Health Communication Time-resolved monitoring of microalgae agglomeration facilitates screening of coagulants/flocculants (CFs) from numerous biopolymer candidates. Herein, a filtering-flowing analysis (FFA) apparatus was developed in which dispersed microalgal cells were separated from coagulates and flocs formed by CFs and pumped into spectrophotometer for real-time quantification. Polysaccharides-based CFs for Microcystis aeruginosa and several other microalgae were tested. Cationic hydroxyethyl cellulose (CHEC), chitosan quaternary ammonium (CQA) and cationic guar gum (CGG) all triggered coagulation obeying a pseudo-second-order model. Maximal coagulation efficiencies were achieved at their respective critical dosages, i.e., 0.086 g/g(M.a.) CHEC, 0.022 g/g(M.a.) CQA, and 0.216 g/g(M.a.) CGG. Although not active independently, bacterial exopolysaccharides (BEPS) aided coagulation of M. aeruginosa and allowed near 100% flocculation efficiency when 0.115 g/g(M.a.) CQA and 1.44 g/g(M.a.) xanthan were applied simultaneously. The apparatus is applicable to other microalgae species including Spirulina platensis, S. maxima, Chlorella vulgaris and Isochrysis galbana. Bio-based CFs sorted out using this apparatus could help develop cleaner processes for both remediation of harmful cyanobacterial blooms and microalgae-based biorefineries. MDPI 2022-11-07 /pmc/articles/PMC9657197/ /pubmed/36361487 http://dx.doi.org/10.3390/ijerph192114610 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Communication
Zhou, Jinxia
Jia, Yunlu
Gong, Xiaobei
Liu, Hao
Sun, Chengwu
Time-Resolved Kinetic Measurement of Microalgae Agglomeration for Screening of Polysaccharides-Based Coagulants/Flocculants
title Time-Resolved Kinetic Measurement of Microalgae Agglomeration for Screening of Polysaccharides-Based Coagulants/Flocculants
title_full Time-Resolved Kinetic Measurement of Microalgae Agglomeration for Screening of Polysaccharides-Based Coagulants/Flocculants
title_fullStr Time-Resolved Kinetic Measurement of Microalgae Agglomeration for Screening of Polysaccharides-Based Coagulants/Flocculants
title_full_unstemmed Time-Resolved Kinetic Measurement of Microalgae Agglomeration for Screening of Polysaccharides-Based Coagulants/Flocculants
title_short Time-Resolved Kinetic Measurement of Microalgae Agglomeration for Screening of Polysaccharides-Based Coagulants/Flocculants
title_sort time-resolved kinetic measurement of microalgae agglomeration for screening of polysaccharides-based coagulants/flocculants
topic Communication
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9657197/
https://www.ncbi.nlm.nih.gov/pubmed/36361487
http://dx.doi.org/10.3390/ijerph192114610
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