Comparative data on effects of alkaline pretreatments and enzymatic hydrolysis on bioemulsifier production from sugarcane straw by Cutaneotrichosporon mucoides

Autor(es)

Jimenez, Itzcoatl M. ^[1] ; Chandel, Anuj K. ^[1] ; Marcelino, Paulo R. F. ^[1] ; Anjos, Virgilio ^[2] ; Costa, Cassiano Batesttin ^[2] ; Bell, Maria Jose V. ^[2] ; Pereira, Barbara ^[1] ; da Silva, Silvio S. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Biotechnol, Engn Sch Lorena, Estr Municipal Campinho S-N, BR-12602810 Sao Paulo - Brazil

^[2] Univ Fed Juiz de Fora, Dept Phys, Engn & Mat Spect Grp, BR-36036900 Juiz De Fora, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Bioresource Technology; v. 301, APR 2020.
• Citações Web of Science: 0

Resumo

Bioemulsifiers are surface active compounds which could be potentially used in food processing, cosmetic sector and oil recovery. Sugarcane straw (SS), was used as the raw substrate for the production of bio-emulsifiers (BE) by Cutaneotrichosporon mucoides. Three different delignification strategies using dilute sodium hydroxide, sodium sulfite and ammonium hydroxide followed by enzymatic hydrolysis (Cellic CTec 2, 7.5% total solids, 15 FPU/g, 72 h) were studied. Enzyme hydrolysis of ammonium hydroxide pretreated SS showed a maximum of 62.19 +/- 0.74 g/l total reducing sugars with 88.35% hydrolytic efficiency (HE) followed by sodium hydroxide (60.06 +/- 0.33 g/l; 85.40% HE) and sodium sulfite pretreated SS (57.22 +/- 0.52 g/l; 84.71% HE), respectively. The ultrastructure of SS (native and delignified) by fourier transform-infrared and near infrared spectroscopy, revealed notable structural differences. The fermentation of hydrolysates by C. mucoides into bioemulsifiers showing emulsification index (EI) of 54.33%, 48.66% and 32.66% from sodium sulfite, sodium hydroxide, and ammonium hydroxide pretreated SS, respectively. (AU)

• Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
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