Enzymatically hydrolysed molasses and sodium citrate as new potentials for the improvement of canthaxanthin batch synthesis by Dietzia natronolimnaea HS-1: A statistical media optimisation

Seyed Mohammad Taghi Gharibzahedi, Seyed Hadi Razavi and Mohammad Mousavi
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Seyed Mohammad Taghi Gharibzahedi: Center of Excellence for Application of Modern Technologies for Producing Functional Foods and Drinks and Bioprocess Engineering Laboratory (BPEL), Department of Food Science, Engineering & Technology, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran
Seyed Hadi Razavi: Center of Excellence for Application of Modern Technologies for Producing Functional Foods and Drinks and Bioprocess Engineering Laboratory (BPEL), Department of Food Science, Engineering & Technology, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran
Mohammad Mousavi: Center of Excellence for Application of Modern Technologies for Producing Functional Foods and Drinks and Bioprocess Engineering Laboratory (BPEL), Department of Food Science, Engineering & Technology, Faculty of Agricultural Engineering and Technology, University of Tehran, Karaj, Iran

Czech Journal of Food Sciences, 2014, vol. 32, issue 4, 326-336

Abstract: Response surface methodology-central composite rotatable design (RSM-CCRD) was applied to explore the optimum media formulation for maximising canthaxanthin (CTX) biosynthesis by Dietzia natronolimnaea HS-1. The effects of three variables of enzymatically hydrolysed molasses (EHM) (16.6-33.4 g/l), sodium (Na)-citrate (21.64-28.36mM), and yeast extract (6.32-9.68 g/l) concentrations on the production of CTX, total carotenoid (TCT), and biomass dry weight (BDW) were appraised. The results showed that the quadratic effects of EHM, yeast extract, and Na-citrate contents in terms of second-order polynomial regression equations (R2 = 0.968-0.986), respectively, had the most significant effects on the produced TCT and CTX. The predicted maximum accumulation of BDW (8.88 g/l), TCT (7.24 mg/l), and CTX (6.40 mg/l) under the optimum concentrations of the media variables (26.16 g/l EHM, 8.29 g/l yeast extract, and 25.86mM Na-citrate) was very close to the experimental values determined in batch experiments. The high BDW content suggested EHM and Na-citrate as very promising feedstocks for CTX bioproduction by the bacterium studied.

Keywords: enzymatic hydrolysis; sugarbeet molasses hydrolysate; carotenoid pigment; batch submerged fermentation; response surface modelling (search for similar items in EconPapers)
Date: 2014
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Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlcjf:v:32:y:2014:i:4:id:472-2013-cjfs

DOI: 10.17221/472/2013-CJFS

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