Artigo
A low‑cost brewery waste as a carbon source in bio‑surfactant production
Fecha
2021-06-22Registro en:
Nazareth, T.C., Zanutto, C.P., Maass, D. et al. A low-cost brewery waste as a carbon source in bio-surfactant production. Bioprocess Biosyst Eng 44, 2269–2276 (2021).
16157605
Autor
Corrêa Nazareth, Talita
Planas Zanutto, Conrado
Maass, Danielle [UNIFESP]
Ulson de Souza, Antônio Augusto
Guelli Ulson de Souza, Selene Maria de Arruda
Institución
Resumen
This work aims to produce bio-surfactant using a brewery waste (trub) as a strategy to reduce production costs related to the substrate, as well as to provide an eco-friendly destination for this residue. Trub is obtained during the boiling of the wort, being mainly composed of proteins and reducing sugars. To evaluate important process parameters on bio-surfactant production, a full factorial design (2^4) was elaborated, having agitation rate and concentrations of trub, yeast extract, and peptone as independent variables. The highest bio-surfactant concentration achieved was 100.76 mg L−1, where FTIR and Maldi-ToF-MS confirmed functional groups characteristic of peptides and isomers of surfactin in the biosurfactant extract. Trub, agitation and yeast extract showed statistically significant effects on the response variable (surface tension), where an increase in the agitation rate and in the concentration of yeast extract demonstrated a positive impact on the production of bio-surfactant.