4.6 Article

Cultivation of Tetraselmis suecica using a fishmeal factory effluent: effect on the growth, biochemical composition, and nutrient removal

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JOURNAL OF APPLIED PHYCOLOGY
卷 33, 期 4, 页码 1949-1959

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DOI: 10.1007/s10811-021-02478-0

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Nutrient bioremediation; Fatty acids; Stickwater; Wastewater; Marine microalgae

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This study found that replacing F/2 with 75% STW resulted in the best growth performance for Tetraselmis suecica, including the highest algal cell density and lipid productivity.
One of the main effluents from fishmeal plants is stickwater (STW) that causes a considerable number of environmental hazards. This study aimed to replace standard growth medium (F/2; as an enriched solution for growing most of the marine microalgae) of Tetraselmis suecica with different ratios of STW from a kilka fishmeal plant including 0% (control), 10%, 25%, 50%, 75%, and 100%. Results showed that the highest nutrient removal efficacy was obtained in 75% STW treatment, followed by the highest algal cell density (1.23 x 10(7) cells mL(-1)) (P <0.05). A significant increase in the concentrations of photosynthetic pigments (chlorophyll a, b) and lipid productivity was recorded in 75% STW treatment compared to others (P <0.05). The maximum contents of carotenoids and crude protein were obtained in 100% and 50% STW groups, respectively. The levels of saturated and monosaturated fatty acids were significantly increased by increasing the inclusion ratio of STW from 50 to 100% (P <0.05). However, the lowest level of polyunsaturated fatty acids was measured in 100% STW treatment. Overall, replacing F/2 with STW up to 75% is feasible to culture T. suecica with the highest biomass and lipid productivity.

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