Conclusions
Present study was aimed to produce a high quantity of zinc-enriched yeast biomass in the presence of zinc metal using S. cerevisiaeas an industrially important yeast strain. The optimum zinc concentration in the culture medium and its effect on the yeast growth rate and zinc content in yeast biomass was determined. Our investigation appeared that S. cerevisiae biomass and protein production value under optimal conditions was similar to other studies. Importantly,S. cerevisiae is a promising candidate for SCP production because it has beneficial functional properties; such as high potential for biotechnological and especially food-related applications as well as ability to produce high amounts of protein content (around 50 w/w %). In summary, our study demonstrated the possibility of upgrading low value industrial effluents to SCP that can be used as a high-quality feed ingredient. Nevertheless, further research is required to develop an economically SCP process and introduce feed ingredients based on industrial side streams as substrates.