Hilal Kargin  Yilmaz, Deniz  Ayas, Harun  Yilmaz, 
    The Effects of Different Salinity Ratios on Reproductive Rates and Proximate Composition of <I>Spirulina platensis</I> in a Helical Photobioreactor,
    Journal of Animal and Veterinary Advances,
    Volume 9,Issue 18,
    2010,
    Pages 2427-2431,
    ISSN 1680-5593,
    javaa.2010.2427.2431,
    (https://makhillpublications.co/view-article.php?doi=javaa.2010.2427.2431)
    Abstract: <I>Spirulina platensis</I>, cyanobacteria was cultivated in a helical photobioreactor and in a continuous system. Cultivation continued at different salinity ratios (10, 20, 30%) for 10 days. The total volume of the photobioreactor was 24.3 L comprising of 18 L nutrition medium and 6.3 L algae. Each day, the system yielded 10 L of algae and 10 L of nutrition medium was added into the system. At the end of 10 day experiment, the medium reached to1.042x10<SUP>7</SUP> filament L<SUP>-1</SUP> from an initial filament density of 7.596x10<SUP>6</SUP> filament L<SUP>-1</SUP> at 10% salinity, 7.409x10<SUP>6</SUP> filament L<SUP>-1</SUP> from an initial filament density of 7.60x10<SUP>6</SUP> filament L<SUP>-1</SUP> at 20% salinity and to 7.381x10<SUP>6</SUP> filament L<SUP>-1</SUP> from an initial filament density of 7.62x10<SUP>6</SUP> filament L<SUP>-1</SUP> at 30% salinity. Variations in proximate composition of <I>S. platensis</I> occurred due to the different rates of salinity. Carbohydrate, TMS (Total Mineral Substance) and lipid values increased; protein levels decreased in parallel with the increase in salinity. A reduction of approximately 13.05% occurred in the protein values, 26.08% increase in the lipid value, 31.85% increase in TMS and 9.86% increase in carbohydrate values were observed.
    Keywords: Spirulina platensis;helical photobioreactor;salinity ratios;reproductive productivity;proximate composition