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Bioconversion of spent coffee grounds into carotenoids and other valuable metabolites by selected red yeast strains

Paper ID Volume ID Publish Year Pages File Format Full-Text
3022 147 2014 9 PDF Available
Title
Bioconversion of spent coffee grounds into carotenoids and other valuable metabolites by selected red yeast strains
Abstract

•A spent coffee ground has been utilized for yeast biomass production.•The cultivation was carried out in shaking flasks and laboratory bioreactor.•Dried spent coffee ground contains approximately 15% of oil fraction.•Sporobolomyces roseus showed the highest potential for the pigment accumulation.•The introduction of pulse feeding strategy remarkably improved biomass production.

Spent coffee grounds (SCG) represent the main coffee industry residues with a great potential to be reutilized in various biotechnological processes. In this study, several carotenogenic yeasts strains were exploited for the production of vitamin-enriched biomass, cultivating in SCG-based media. The fermentation was firstly carried out in Erlenmeyer flasks in order to select the best biomass and pigment producer. Among four tested strains, Sporobolomyces roseus showed the highest potential for the accumulation of carotenoids. Maximum pigment concentration and yield was obtained when cultivating in SCG-based media, 12.59 mg l−1 and 1.26 mg g−1, respectively. Comparing both, the batch and the fed-batch cultivation modes, the strategy of sequential addition of pre-concentrated SCG media in the bioreactor gave higher biomass yield (maximum 41 g l−1 during 41–48 h after the beginning of fermentation). Thus, SCG can be considered as potentially promising industrial waste stream for economically feasible production of enriched yeasts biomass.

Keywords
Spent coffee grounds; Bioconversion; Yeast; Carotenoids; Bioreactors; Fed-batch culture
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Bioconversion of spent coffee grounds into carotenoids and other valuable metabolites by selected red yeast strains
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 90, 15 September 2014, Pages 307–315
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us