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Biotechnological potential of industrial wastes for economical citric acid bioproduction by Aspergillus niger through submerged fermentation.

Dhillon, Gurpreet Singh; Brar, Satinder Kaur; Verma, Mausam P. (2012). Biotechnological potential of industrial wastes for economical citric acid bioproduction by Aspergillus niger through submerged fermentation. International Journal of Food Science and Technology , vol. 47 , nº 3. p. 542-548. DOI: 10.1111/j.1365-2621.2011.02875.x.

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Résumé

Submerged citric acid (CA) bioproduction was carried out by Aspergillus niger NRRL-567 using various industrial wastes, such as brewery spent liquid (BSL), lactoserum and starch industry water sludge. CA bioproduction was carried out by varying the temperature (25-35°C), pH (3-5), addition of inducers, incubation time and supplementation with different proportions of apple pomace ultrafiltration sludge (APS). The results indicated that under the best conditions with 3% (v/v) methanol, the optimal concentration of 11.34gL ⁻¹ CA was recorded using BSL at pH 3.5 and temperature 30°C after 120-h incubation period. Supplementation of methanol resulted in an increase of 56% CA production. Meanwhile, under similar conditions, higher concentration of 18.34gL ⁻¹ CA was reported with the supplementation of BSL with 40% (v/v) APS having suspended solids concentration of 30gL ⁻¹. The present study demonstrated the potential of BSL supplemented with APS as an alternative cheap substrate for CA fermentation.

Type de document: Article
Mots-clés libres: apple pomace ultrafiltration sludge; aspergillus niger; brewery spent liquid; lactoserum; starch industry water sludge; submerged fermentation
Centre: Centre Eau Terre Environnement
Date de dépôt: 19 oct. 2018 14:17
Dernière modification: 19 oct. 2018 14:17
URI: http://espace.inrs.ca/id/eprint/7248

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