期刊
BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY
卷 42, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.bcab.2022.102342
关键词
Red yeast; Oleaginous yeast; Single cell oil; Optimization; Fatty acid
资金
- CAPES (Brazilian Agency for the Improvement of Graduate Personnel)
- CNPq (National Council of Science and Technological Development)
Simultaneous production of lipids and carotenoids can reduce the high cost of culture medium in industrial production. This study used a combination of sugarcane molasses and cassava wastewater to optimize the production process and successfully obtained higher yields and concentrations of lipids and carotenoids.
A major obstacle in the bioproduction of metabolites of industrial interest is the high cost of the culture medium. Obtaining two bioproducts simultaneously (lipids and carotenoids) by Rhodo-torula mucilaginosa can solve part of this problem. However, reconciling two metabolites is a challenge since the nutritional needs of yeasts for one metabolite (lipid) are often not the same as those for another (carotenoids). The use of co-products can minimize the cost of the process when they substitute a commercial medium. And the success of simultaneous bioproduction can be achieved using a strategy of experimental planning that combines sugarcane molasses (25 g/L to 55 g/L) and cassava wastewater (20 g/L to 50 g/L), optimizing and adding value to the process. In this study, 7.94 g/L of lipids were produced with an accumulation in dry mass of 48.14% and 2958.32 mu g/L (168.08 mu g/g) of volumetric and specific carotenoids concentration. In addition, in an experiment using ammonium sulfate (3 g/L) as an activator, there was an increase of 94.46% and 81.16% in the production of specific and volumetric carotenoids, respectively. In the gas chromatographic analysis, oleic (73.67%), palmitic (20.23%) and linoleic (4.01%) acids were found. Our studies demonstrated the strategic viability of simultaneously obtaining lipids and carotenoids through an ideal combination of co-products from cheap renewable sources, making it possible to reduce the costs of processing in bioreactors.
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