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

Quimica nova

Anna, Lídia Maria Melo Santa¹  Pereira Jr., Nei²  Melo, Walber Carvalho²  Silva, Daniele Barreto da²  Santos, Alexandre Soares dos³ 

[1] PETROBRAS, Rio de Janeiro, Brasil;Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brasil;Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brasil

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-1of reducing sugars (hydrolysis efficiency= 32%). The hydrolyzed product wasfermented and produced 11 g L-1 of ethanol (volumetric productivity=1.38g L-1 h-1 and ethanol yield on substrate consumed=0.45g g-1). In vivo experiments (DL50) revealed a reduction ofroughly 240 times in the CBC toxicity (2.11 µg g-1).

【 授权许可】

CC BY