Screening of alternative nitrogen sources for sophorolipid production through submerged fermentation using Starmerella bombicola
Eras-Muñoz, Estefanía (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Wongsirichot, Phavit (The University of Manchester. Department of Chemical Engineering)
Ingham, Benjamin (The University of Manchester. Department of Chemical Engineering)
Winterburn, James (The University of Manchester. Department of Chemical Engineering)
Gea Leiva, Teresa (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Font i Segura, Xavier (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Fecha:	2024
Resumen:	To explore a sustainable sophorolipid production, several hydrolysates from agricultural byproducts, such as wheat feed, rapeseed meal, coconut waste and palm waste were used as nitrogen sources. The four hydrolysates overperformed the controls after 168 h of fermentation using Starmerella bombicola ATCC 22214. Wheat feed and coconut waste hydrolysates were the most promising feedstocks presenting a linear relationship between yeast growth and diacetylated lactonic C18:1 production at total nitrogen concentrations below 1. 5 g/L (R = 0. 90 and 0. 83, respectively). At 0. 31 g/L total nitrogen, wheat feed hydrolysate achieved the highest production, yielding 72. 20 ± 1. 53 g/L of sophorolipid crude extract and 60. 05 ± 0. 56 g/L of diacetylated lactonic C18:1 at shake flask scale with productivities of 0. 43 and 0. 36 g/L/h, respectively. Results were confirmed in a 2-L bioreactor increasing 15 % diacetylated lactonic C18:1 production. Moreover, wheat feed hydrolysate supplemented only with a hydrophobic carbon source was able to produce mainly diacetylated lactonic C18:1 congener (88. 5 % wt. ), suggesting that the composition of the hydrolysate significantly influences the congeners profile. Overall, this study provides valuable insights into agricultural byproduct hydrolysates as potential nitrogen feedstocks for sophorolipid production and their further application on industrial biotechnology.
Ayudas:	Agencia Estatal de Investigación PID2020-114087RB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca 2020/FISDU-00436
Nota:	Altres ajuts: acords transformatius de la UAB
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Biosurfactant ; Sophorolipid ; Agricultural byproducts ; Hydrolysates ; Circular economy
Publicado en:	Waste management (Elmsford), Vol. 186 (September 2024) , p. 23-34, ISSN 1879-2456

DOI: 10.1016/j.wasman.2024.05.048

12 p, 3.0 MB

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