The impact of cell morphology and algal organic matter on algal floc properties

Physical floc properties were systematically investigated by analysing the structure of algal and cyanobacterial flocs produced by five species (green algae (Chlorella vulgaris) and cyanobacteria (Microcystis aeruginosa (strain CS-564), Microcystis aeruginosa (strain CS-555/01), Dolichospermum circi...

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Bibliographic Details
Published in:Water research (Oxford) 2019-10, Vol.163, p.114887-114887, Article 114887
Main Authors: Gonzalez-Torres, A., Pivokonsky, M., Henderson, R.K.
Format: Article
Language:English
Subjects:
Biomass
Coagulation
Cyanobacteria
Flocculation
Separation
Water treatment
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Summary:Physical floc properties were systematically investigated by analysing the structure of algal and cyanobacterial flocs produced by five species (green algae (Chlorella vulgaris) and cyanobacteria (Microcystis aeruginosa (strain CS-564), Microcystis aeruginosa (strain CS-555/01), Dolichospermum circinale and Cylindrospermopsis raciborskii) using aluminium sulphate (alum) at different doses and pH values. The properties of spherical, compact flocs were determined using a laser diffraction instrument and a new in situ image analysis technique was validated to analyse the structure of more complex flocs. The incorporation of algal-derived organic matter (AOM) into the flocs was inferred by evaluating the dissolved organic matter concentration character before and after flocculation using liquid chromatography with organic carbon detection (LC-OCD). D. circinale, C. raciborskii, and M. aeruginosa (CS-564) produced large flocs (2–9 mm), while M. aeruginosa (CS-555) and C. vulgaris produced smaller flocs (
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2019.114887