Immobilized enzyme-driven value enhancement of lignocellulosic-based agricultural byproducts: Application in aroma synthesis

Autor(es)

Costa-Silva, T. A. ^[1] ; Carvalho, A. K. F. ^[2] ; Souza, C. R. F. ^[1] ; De Castro, H. F. ^[2] ; Bachmann, L. ^[3] ; Said, S. ^[1] ; Oliveira, W. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Fac Pharmaceut Sci Ribeirao Preto, Sao Paulo - Brazil

^[2] Univ Sao Paulo, Engn Sch Lorena, Sao Paulo - Brazil

^[3] Univ Sao Paulo, Fac Philosophy Sci & Letters Ribeirao Preto, Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CLEANER PRODUCTION; v. 284, FEB 15 2021.
• Citações Web of Science: 3

Resumo

We have combined the advantages of immobilization and spouted bed drying to enhance lipase activity and stability for further use of this enzyme in esterification. Through covalent binding, Cercospora kikuchii lipase was immobilized onto agricultural byproducts activated with glutaraldehyde, sodium periodate, or epichlorohydrin. The immobilized derivatives showed high lipase activity retention (from 83.8 to 116.9%) and low residual moisture (average of 3.96%) and water activity (average of 0.19). The kinetic parameters KM and Vmax of the free lipase were 0.212 mM and 160.3 mu mol/min/mg, respectively; lipase immobilized onto the support activated with 1.5% glutaraldehyde had lower KM (0.121 mM) and higher V-max (275.4 mu mol/min/mg). Lipase immobilized onto rice husk retained 60.3% of its initial enzyme activity after five reuse cycles, and its residual activity was high 88.7% after storage at 5 degrees C for six months. This immobilized derivative system was used to catalyze butyl butyrate synthesis. Under the best conditions for butyl butyrate production (temperature of 50 degrees C and enzyme concentration of 0.5 g), the esterification yields reached 95.0% and afforded a butyl butyrate concentration of 15.2 g/L. The enzyme stability, high activity retention after reuse cycles, and ability to catalyze butyl butyrate synthesis from butyric acid strongly indicate that the innovative one-step immobilization protocol reported herein is feasible for lipase immobilization onto the surface of eco-friendly supports. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 11/00743-8 - Produção e imobilização de lipases produzidas pelo fungo endofítico Cercospora kikuchii para aplicações biotecnológicas
• Beneficiário: Tales Alexandre da Costa e Silva
• Modalidade de apoio: Bolsas no Brasil - Doutorado