Corncob as Carbon Source in the Production of Xanthan Gum in Different Strains Xanthomonas sp

Meirielly Jesus (), Fernando Mata, Rejane A. Batista, Denise S. Ruzene, Ricardo Albuquerque-Júnior, Juliana C. Cardoso, Manuela Vaz-Velho, Preciosa Pires, Francine F. Padilha and Daniel P. Silva
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Meirielly Jesus: Center for Research and Development in Agri-Food Systems and Sustainability, Polytechnic Institute of Viana do Castelo, Praça General Barbosa, 4900-347 Viana do Castelo, Portugal
Fernando Mata: Center for Research and Development in Agri-Food Systems and Sustainability, Polytechnic Institute of Viana do Castelo, Praça General Barbosa, 4900-347 Viana do Castelo, Portugal
Rejane A. Batista: Institute of Technology and Research of Sergipe, Rua Campo do Brito, 371–Bairro São José, Aracaju 49020-380, SE, Brazil
Denise S. Ruzene: Center for Exact Sciences and Technology, Federal University of Sergipe, Cidade Universitária Professor José Aloísio de Campos, Av. Marechal Rondon, Jardim Rosa Elze, Aracaju 49100-000, SE, Brazil
Ricardo Albuquerque-Júnior: Department of Pathology, Federal University of Santa Catarina, Rua Engenheiro Agronômico Andrei Cristian Ferreira, Trindade, Florianópolis 88040-900, SC, Brazil
Juliana C. Cardoso: Post-Graduation in Health and Environment, Tiradentes University, Rua Lagarto, 236–Centro, Aracaju 49010-390, SE, Brazil
Manuela Vaz-Velho: Center for Research and Development in Agri-Food Systems and Sustainability, Polytechnic Institute of Viana do Castelo, Praça General Barbosa, 4900-347 Viana do Castelo, Portugal
Preciosa Pires: Center for Research and Development in Agri-Food Systems and Sustainability, Polytechnic Institute of Viana do Castelo, Praça General Barbosa, 4900-347 Viana do Castelo, Portugal
Francine F. Padilha: Biomaterials Laboratory, Institute of Technology and Research, Av. Murilo Dantas, nº 300–Prédio do ITP, Farolândia, Aracaju 49032-490, SE, Brazil
Daniel P. Silva: Center for Exact Sciences and Technology, Federal University of Sergipe, Cidade Universitária Professor José Aloísio de Campos, Av. Marechal Rondon, Jardim Rosa Elze, Aracaju 49100-000, SE, Brazil

Sustainability, 2023, vol. 15, issue 3, 1-13

Abstract: Xanthan gum (XG) is a biopolymer obtained in fermentation and used as a rheology control agent in aqueous systems and in stabilizing emulsions and suspensions. XG, together with other polysaccharides, can form soft, cohesive composite gels. The carbon source in the fermentative process is responsible for one-third of the production costs, and the search for less expensive and sustainable alternatives is ongoing. The use of agricultural residues such as the corncob is highly suggestive due to their abundance. This study aims to evaluate the use of derived hemicellulose fractions from the alkaline extraction of corncob as a carbon source in the production of XG in trials using four strains of Xanthomonas sp. (629, 1078, 254, and S6). The results indicate that strain 629 provides the higher yield (8.37 ± 5.75 g L −1 ) while using a fermentation medium containing a carbon source of saccharose (1.25%), hemicellulose fractions (3.75%), and salts. In this same medium, the strain 629 produces gum in 3% aqueous solution, showing the higher apparent viscosity (9298 ± 31 mPa s −1 ) at a shear rate of 10 s −1 at 25 °C. In conclusion, corncob is proven to be a promising sustainable alternative carbon source in the obtention of XG, improving the economic viability of the process within a biorefinery context. Saccharose must, however, also be included in the fermentation medium.

Keywords: Xanthomonas campestris; XG; pre-treatment; hemicellulose fraction; biopolymer; corncob (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
References: View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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