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Table 9 Some possible co-products of algal biofuel production (Hejazi and Wijffels 2004; Lorenz and Cysewski 2000; Pulz and Gross 2004; Rosenberg et al. 2008; Spoalore et al. 2006)

From: Integration of biology, ecology and engineering for sustainable algal-based biofuel and bioproduct biorefinery

Market Product Species Potential application
Hydrogen Bio-hydrogen C. reinhardtii Hydrogenation
Chemicals Biohydrocarbons Nannochloropsis Biochemical
Fuel/chemicals Bio-oil Nannochloropsis Biofuel, chemicals, biochar
Biofuel/product Alcohols: biomethanol, bioethanol Spirulina Biofuel
Polyunsaturated fatty acids Docasahexanoic acid Crypthecodinium, Schizochytrium Nutritional food
Eicosapentanoic acid Nannochloropsis, Phaeodactylum, Nitzschia, Pavlova
γ-Linolenic acid Spirulina
Arachidonic acid Porphyridium
Antioxidants Astaxanthin H. pluvialis
β-Carotene Dunaliella salina Nutritional food, cosmetics
Fluorescent label Phycoerythrin, phycocyanin Spirulina Biomedical Research
Recombinant proteins Cytokines-interleukin-6 interferon gamma and beta   Pharmaceuticals
Nutrition Aquaculture feed Isochrysis, Nannochloropsis, Tetraselmis Aquaculture
Animal feed Various Agriculture
Polysaccharides Agar Various Food products
Alginates
Carrageenans