Ethanol production from castor bean cake (Ricinus communis L.) and evaluation of the lethality of the cake for mice

Química Nova

Pereira Jr., Nei¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil¹  Melo, Walber Carvalho¹  PETROBRAS, Rio de Janeiro, Brasil¹  Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brasil¹  Anna, Lídia Maria Melo Santa¹  Santos, Alexandre Soares dos¹  Silva, Daniele Barreto da¹ 

关键词: castor bean cake;    acid hydrolysis;    ethanol.;   

DOI  :  10.1590/S0100-40422008000500031

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The castor bean cake is rich in starch (48 ± 0.53%) and bears a problem linked to the occurrence of a toxic protein (ricin). The chemical hydrolysis (ratio solid:liquid = 1:6; H2SO4= 0.1 mol L-1; 120 °C; 40 min) generated a medium with 27 g L-1 of reducing sugars (hydrolysis efficiency= 32%). The hydrolyzed product was fermented and produced 11 g L-1 of ethanol (volumetric productivity=1.38 g L-1 h-1 and ethanol yield on substrate consumed=0.45 g g-1). In vivo experiments (DL50) revealed a reduction of roughly 240 times in the CBC toxicity (2.11 µg g-1).

【 授权许可】

Unknown