Title: Influence of organic matter generated by Chlorella vulgaris on five different modes of flocculation
Authors: Vandamme, Dries ×
Foubert, Imogen
Fraeye, Ilse
Muylaert, Koenraad #
Issue Date: Nov-2012
Publisher: Elsevier Applied Science
Series Title: Bioresource Technology vol:124 pages:508-511
Abstract: Microalgae excrete relatively large amounts of algal organic matter (AOM) that may interfere with
flocculation. The influence of AOM on flocculation of Chlorella vulgaris was studied using five different
flocculation methods: aluminum sulfate, chitosan, cationic starch, pH-induced flocculation and
electro-coagulation–flocculation (ECF). The presence of AOM was found to inhibit flocculation for all flocculation
methods resulting in an increase of dosage demand. For pH-induced flocculation, the dosage
required to achieve 85% flocculation increased only 2-fold when AOM was present, while for chitosan,
this dosage increased 9-fold. For alum, ECF and cationic starch flocculation, the dosage increased 5–6-
fold. Interference by AOM is an important parameter to consider in the assessment of flocculation-based
harvesting of microalgae.
ISSN: 0960-8524
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Microbial and Molecular Systems, Campus Kulak Kortrijk
Biology, Campus Kulak Kortrijk
× corresponding author
# (joint) last author

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