Biotechnology with Cyanobacteria and Microalgae

Recovery of microalgal biomass and metabolites: process options and economics

“…Microalgae can be used to produce numerous high-value bioactives (Borowitzka, 1986;Bubrick, 1991;Pulz et al, 2001;Li et al, 2001;Banerjee et al, 2002). Production of 0734-9750/02/$ -see front matter D 2002 Elsevier Science Inc. All rights reserved.…”

“…Closed photobioreactors may be located indoors or outdoors (Sánchez Mirón et al, 1999;Pulz, 2001), but outdoor location is more common because it can make use of free sunlight. Design and operation of the microalgal biomass production systems have been discussed extensively (Terry and Raymond, 1985;Borowitzka, 1996;Pulz and Scheinbenbogen, 1998;Pulz, 2001;Pulz et al, 2001;Sánchez Mirón et al, 1999;Tredici, 1999). Here, we focus exclusively on issues relating with the harvest of the biomass and its downstream processing to recover intracellular metabolites.…”

“…Production of 0734-9750/02/$ -see front matter D 2002 Elsevier Science Inc. All rights reserved. PII: S 0 7 3 4 -9 7 5 0 ( 0 2 ) 0 0 0 5 0 -2 microalgae-derived metabolites requires processes for culturing the alga (Ben-Amotz and Avron, 1987;Sánchez Mirón et al, 1999;Tredici, 1999;Borowitzka, 1999;Pulz, 2001;Pulz et al, 2001), recovery of the biomass, and further downstream processing to purify the metabolite from the biomass. As with many microbial processes for producing bioactives, the downstream recovery of algal products can be substantially more expensive than the culturing of the alga.…”

NUTRITION Acides gras polyinsaturés de microalgues : intérêts et développements actuels

“…Différentes stratégies ont été développées pour la production de biomasse microalgale [4,[15][16][17][18][19][20][21]. La première de ces stratégies est la culture extensive en extérieur dans des bassins ouverts de forme circulaire ou en boucle (raceway) construits avec des matériaux peu coûteux comme des bâches plastiques.…”

Control of Branchionus sp. and Amoeba sp. in cultures of Arthrospira sp.

“…This can reduce the production up 90% and in some cases the total loss of the culture (Lincoln et al, 1983;Richmond, 2004). For these reasons, it is important to identify the type of contamination in order to implement control measures to mitigate or eliminate the contaminant, to maintain a healthy culture, highly productive, to obtain specific products such as vitamins, proteins, fatty acids, polyunsaturated, pigments, antibiotics, hydrogen, hydrocarbons, and bioactive compounds (Borowitzka, 1992;Metting, 1996;Cohen, 1999;Pulz et al, 2001;Morales et al, 2002;Domínguez et al, 2003).…”