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Revalorization of green tea waste through the production of cellulases by solid-state fermentation using a Aspergillus niger 28A

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Abstract

Revalorization of green tea residues (GTR) was carried out through cellulase production by solid-state fermentation (SSF) using Aspergillus niger 28A. An exploratory study in the production of endocellulases (EC), β-glucosidases (BG), and total cellulase activity (FPUase) was carried out. The effect of operational conditions as moisture, temperature, and kinetic time was evaluated. The BG was partially purified by dialysis and ultracentrifugation, and the optimal pH and temperature for its activity were determined. It was found that A. niger 28A produced high titers of EC (65.85 ± 2.18 IU/g), FPUase (5.44 ± 0.11 FPU/g), and BG activities (1,016.52 ± 3.58 IU/g) in the exploratory analysis. The best operational conditions for enzymes production were 34 °C and 96 h for EC and FPUase activities, and 32 °C, 65% moisture, and 120 h for BG activity, respectively. After the partial purification process, the BG reached a specific activity of 496.90 ± 75.04 IU/mg. The optimal conditions for BG activity from the partially purified extracts were pH 4 and 60 °C. GTR constitutes a suitable biomass and substrate in the production of cellulase, reaching high titers of BG, proposing a way for its revalorization through the generation of high added value products as enzymes for the depolymerization of cellulose.

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Acknowledgements

The authors thank the financial support given by the National Council of Science and Technology (CONACYT-Mexico) through the project FONCICYT-CONACYT-SRE-C0013-2015-03-266614, which was implemented within a framework of bilateral cooperation between Mexico and India. Author Salvador A. Saldaña Mendoza thanks CONACYT-Mexico and the Autonomous University of Coahuila for the financial support for his studies through the scholarship with number 868325. Authors also thank Juan C. Contreras-Esquivel, Raúl Rodríguez-Herrera, José L. Martínez-Hernández, and Shiburaj Sughatan for their help whit the language and proofread the article.

Funding

This work was funding by the National Council of Science and Technology (CONACYT-Mexico) through the project FONCICYT-CONACYT-SRE-C0013-2015–03-266614.The funding source had no participation in the development of the research, writing of the article or in making the decision to submit this work for publication. The author Salvador Alexis Saldaña Mendoza thanks CONACYT-Mexico for the scholarship granted for the development of his postgraduate studies with number 868325.

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Authors and Affiliations

  1. Bioprocesses & Bioproducts Group, Food Research Department, School of Chemistry, Autonomous University of Coahuila, 25280, Saltillo, Coahuila, Mexico

    Salvador A. Saldaña-Mendoza, Juan A. Ascacio-Valdés & Cristóbal N. Aguilar

  2. ESPOL Polytechnic University, Escuela Superior Politécnica del Litoral, ESPOL, Facultad de Ingeniería en Mecánica y Ciencias de la Producción, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863, Guayaquil, Ecuador

    Arturo S. Palacios-Ponce

  3. Biorefinery Group, Food Research Department, School of Chemistry, Autonomous University of Coahuila, 25280, Saltillo, Coahuila, Mexico

    Héctor A. Ruiz

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  1. Salvador A. Saldaña-Mendoza
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  3. Héctor A. Ruiz
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Contributions

Salvador A. Saldaña-Mendoza: Conceptualization, Methodology, Investigation Writing—Original Draft. Arturo S. Palacios-Ponce: Review & Editing. Héctor A. Ruiz: Resources, Review & Editing. Alberto Ascacio-Valdés: Resources. C.N. Aguilar: Project administration, Funding acquisition, Supervision.

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Correspondence to Cristóbal N. Aguilar.

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Saldaña-Mendoza, S.A., Palacios-Ponce, A.S., Ruiz, H.A. et al. Revalorization of green tea waste through the production of cellulases by solid-state fermentation using a Aspergillus niger 28A. Biomass Conv. Bioref. (2023). https://doi.org/10.1007/s13399-023-03919-1

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