Abstract Twelve salts were tested for their ability to coagulate microalgae cells in cultures of Chlorella minutissima. The final aim was to develop an easy and efficient approach for harvesting microalgae biomass in dense cultures. Aluminum,
ferric, and zinc salts coagulated C. minutissima cultures, while optimum concentration was 0.75 and 0.5 g L−1 for sulfate and chloride salts, respectively. Aluminum salts were most efficient, but caused some cell lysis, which may render
this approach inappropriate in some cases. Ferric and zinc salts were ranked second and third, respectively, according to
their culture cell-coagulation efficiency. Ferric salts caused a change in the color of the cells, mainly at concentrations
higher than 1 g L−1. Zinc salts were less harmful for the microalgal cells, but an additional problem was observed with cell aggregates adhering
to the walls of the glass test tubes. Selection of the appropriate coagulant is related to the purpose of the coagulation
process.
ferric, and zinc salts coagulated C. minutissima cultures, while optimum concentration was 0.75 and 0.5 g L−1 for sulfate and chloride salts, respectively. Aluminum salts were most efficient, but caused some cell lysis, which may render
this approach inappropriate in some cases. Ferric and zinc salts were ranked second and third, respectively, according to
their culture cell-coagulation efficiency. Ferric salts caused a change in the color of the cells, mainly at concentrations
higher than 1 g L−1. Zinc salts were less harmful for the microalgal cells, but an additional problem was observed with cell aggregates adhering
to the walls of the glass test tubes. Selection of the appropriate coagulant is related to the purpose of the coagulation
process.
- Content Type Journal Article
- DOI 10.1007/s10811-009-9465-2
- Authors
- Aikaterini Papazi, Institute of Aquaculture Hellenic Center for Marine Research P.O. Box 2214 71003 Heraklion Crete Greece
- Pavlos Makridis, Institute of Aquaculture Hellenic Center for Marine Research P.O. Box 2214 71003 Heraklion Crete Greece
- Pascal Divanach, Institute of Aquaculture Hellenic Center for Marine Research P.O. Box 2214 71003 Heraklion Crete Greece
- Journal Journal of Applied Phycology
- Online ISSN 1573-5176
- Print ISSN 0921-8971
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