Production of single cell protein from carbon sources and local compos Candida isolates and it’s role in Cyprinus carpio L. feeding

Sudy was conducted for producing a single-cell protein from Whey and remnants of dates, using local yeast Isolated from the environments of Whey and remnants of dates of Isolates. The study also tackled the impact of the use of selected mixed culture isolates on producing single-cell protein. The production of single cell protein was performed in accordance use of Batch Fermenter. The validity of the produced single cell protein to ensure that it is free from toxins and using to feed the fish Cyprinus carpio L instead of various percents of normal protein. Six Isolates obtained from natural sources, which included 3 Isolates of the whey environment and 3 Isolates of remnants of dates.The use of the Fermenter production rate of the single-cell protein that was 23.35 grams / liter.The results of diagnostic tests showed that isolates returning to Genus of Candida, as diagnosed as Candida utilisWt2 and C. tropicalisDr1.The analysis of results showed that the components of single-cell protein product that the proportion of crude protein ranged between 52.55 - 57.01%, and percentage of carbohydrates 23.74 - 26.9%, and the proportion of ether extracted fat ranged 2.74 - 2.98%, The percentage of ash about 11.03 - 11.38%, the percentage of nucleic acid (3.40-3.96%), while it contains many amino acids, including sulfur amino acids.and Toxicology results showed that the produced was free from toxins. The study showed the possibility of replacing 25% of the animal protein in feed fish feeding by single-cell and used to feed fish Cyprinus carpio L. without significant changes in the final weight of the fish during the experiment period of 70 days.