Use of Trout Effluent as a Culture Medium for Growing Spirulina platensis Microalgae

Microalgae need rich sources of nitrate, phosphate, and potassium to grow, and fish farming effluents are rich in these compounds. An experiment was performed to investigate the effect of trout farming effluent as a culture medium on the growth and value of the main constituents of spirulina microalgae, including the value of protein, fat, and ash. According to the results, using trout farming effluent caused the growth and production of biomass in spirulina so that the value of dry biomass production was 0.3 g / l, and the value of protein, fat, and ash were 44, 0.9, and 13%, respectively. Although the number of spirulina trichomes in the treatment of fish farming effluent was less than the standard culture medium (control), this difference was insignificant on some days of the study so that on the ninth day of the experiment, the value of trichrome in ml was equal in both treatments. According to the research findings, trout effluent can be used as a cheap culture medium for growing spirulina.