Acid and enzymatic hydrolysis of the residue from Castor Bean (Ricinus communis L.) oil extraction for ethanol production: detoxification and biodiesel process integration

Journal of the Brazilian Chemical Society

Santa Anna, Lídia Maria M.¹  Pereira Jr., Nei¹  Santos, Alexandre S. dos¹  Melo, Walber C.¹  Centro de Pesquisas da Petrobras, Rio de Janeiro, Brazil¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil¹  Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, Brazil¹ 

关键词: Castor Bean Cake;    enzymatic hydrolysis;    acid hydrolysis;    bioethanol;   

DOI  :  10.1590/S0103-50532008000300008

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

The starch hydrolysis process of Castor Bean Cake by (CBC) acid or enzymatic combination of alpha-amylase, glucoamylase and pullulanase was evaluated and followed by fermentation. The chemical hydrolysis resulted in 27.3 g L-1 of sugars with 33.4% of hydrolysis efficiency. The generated hydrolyzate was fermented yielding 11 g L-1 of ethanol (YP/S=0.48 g g-1). The best enzymatic hydrolysis condition was as follows (per gram of CBC): 200 µL of a-amylase, at 90 ºC; 200 µL of glucoamylase and 100 µL of pullulanase, both at 60 °C, which yielded 75 g L-1 of total reducing sugars corresponding to 91.4 % of hydrolysis efficiency. These sugars were subsequently converted to 34.5 g L-1 of ethanol. The acid hydrolysis process was also capable to allow the detoxification of the Castor Bean Cake.

【 授权许可】

Unknown