Abstract
Sugar cane bagasse hemicellulosic fraction was hydrolysed by treatment with 70 mg of sulphuric acid per gram of dry mass at 125 °C for 2 h. The hydrolysate was used as the substrate to grow Candida langeronii RLJ Y-019 at 42 °C; initial pH 6.0; stirring at 700 rev/min and aeration at 1.0 and 2.0 v/v/min. The utilization of D-xylose, L-arabinose, and acetic acid were delayed due to the presence of D-glucose, but after D-glucose depletion the other carbon sources were utilized. The kinetic parameters calculated for both cultivations at 1.0 and 2.0 v/v/min included: maximum specific growth rate (μmax) of 0.29 ± 0.01 h−1 and 0.43 ± 0.016 h−1, yields (Y x/s) of 0.36 ± 0.012 and 0.40 ± 0.012 gx/gs and productivity (Q x) of 0.81 ± 0.016 and 0.97 ± 0.012 gx/l/h, respectively, and compared favourably with published results obtained with Candida utilis and Geotrichum candidum. Candida langeronii appeared superior to C. utilis for biomass production from hemicellulose hydrolysate, in that it utilized L-arabinose and was capable of growth at higher temperatures. The biomass contained 48.2, 1.4, 5.8 and 23.4% of total protein, DNA, RNA and carbohydrate, respectively and contained essential amino acids for animal feed.
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Nigam, J. Cultivation of Candida langeronii in sugar cane bagasse hemicellulosic hydrolyzate for the production of single cell protein. World Journal of Microbiology and Biotechnology 16, 367–372 (2000). https://doi.org/10.1023/A:1008922806215
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DOI: https://doi.org/10.1023/A:1008922806215