Re:citric acid

Question

Regarding Citric Acid manufacturing I sent: Sugar syrup can also be used as substrate. Glucose syrups can be prepared from wheat, corn, potato or other starch. The sugar content of the syrup can vary from about 10 to 25, by percentage of weight. Fermentation can continue for about ten to 12 days. The theoretical yield from 100 kg of sucrose is 123 kg of citric monohydrate or 112 kg of anhydrous acid. However, the Aspergillus niger uses some sugar for growth and respiration, and the actual yield varies between 57 & 77% of the theoretical yield, depending on such factors as substrate purity, strain of organism used, and control of fermentation.