Abstract

PEREZ NAVARRO, Omar; LEY CHONG, Néstor; RODRIGUEZ MARROQUI, Karla Regla  and  GONZALEZ SUAREZ, Erenio. Business opportunities of citric acid production by fermentation from sugar substrates in cuba. cen. az. [online]. 2016, vol.43, n.2, pp.85-100. ISSN 0253-5777.

A proposal for opportunities of citric acid production in Cuba, using sources of sugar substrates such as refined sugar, molasses and whey, by submerged fermentation with Aspergillus niger, where a technology is established from the selected substrate which is provided and the microorganism used. This is a demanding process in terms of investment costs and operation where the best combinations of productivity and cost are achieved with molasses followed by refined sugar and whey. For the selected substrate, the mass and energy balance in each of the steps in the process of obtaining citric acid for different productive capacities of citric acid was made and the minimum economic size of 2.5 t / day was determined. A production capacity of 8 t / day of granulated acid (2 640 t / a), with estimated total investment of $ 9,068,713, NPV = $ 1,401,561, IRR = 27% and DPP = 3 years was selected. The project is resistant to the rising price of raw materials and the cost of electricity and is favored when the process is integrated into a sugar mill cogeneration, while it is sensitive to a reduction in the selling price of the product.

Keywords : citric acid; molasses; sugar; whey; timeliness; feasibility.

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