Second-generation ethanol from pineapple leaf fibers

ABSTRACT

The use of different lignocellulosic residues for the production of cellulosic ethanol is an alternative for the expanding demand of this fuel without increasing the planting area of traditional carbohydrate crops. One of the proposed alternatives is the use of pineapple leaf fibers (PALF) residues, which is a material rich in cellulose that can be used as raw material for second-generation (2G) ethanol production. In this study, the PALF was pretreated using an alkaline medium combined with a steam explosion and the 2G ethanol produSction was analyzed by two-way processes to enzymatic hydrolysis using separated hydrolysis and fermentation (SHF) or simultaneous saccharification and fermentation (SSF). Using SHF, the alcoholic fermentation process with addition of molasses provided good fermentability and can handle larger loads of carbohydrate in shorter fermentation time. The SSF was a better method for 2G ethanol production from PALF yielding 96.12%. Therefore, PALF is presented as good raw material for production of 2G ethanol, with all the environmental and social advantages of such approach.

摘要

使用不同木质纤维素残余物生产纤维素乙醇是一种替代燃料的需求，而不增加传统碳水化合物作物的种植面积。提出的替代方案之一是菠萝叶纤维（PALF）残留物的使用，这是一种富含纤维素的材料，可以用作第二代（2G）乙醇生产的原料。本研究采用碱性介质和蒸汽爆破技术对菠萝叶纤维进行预处理，采用双向水解、发酵（SHF）或同步糖化发酵两种工艺对2G乙醇生产进行酶解分析。N（SSF）。采用分离的水解和发酵，添加糖蜜酒精发酵过程提供了良好的发酵性，并能在较短的发酵时间内处理较大的碳水化合物负荷。同时糖化发酵是菠萝叶纤维生产2g乙醇的较好方法，96.12%的菠萝叶纤维是生产第二代乙醇的良好原料，具有良好的环境和社会效益。ES的这种方法。

KEYWORDS:

• Pineapple
• second-generation ethanol
• lignocellulosic residues
• biofuel
• separated hydrolysis and fermentation
• simultaneous saccharification and fermentation

关键词:

• 菠萝
• 第二代乙醇
• 木质纤维素残留物
• 生物燃料
• 分离水解发酵
• 同步糖化发酵

Acknowledgments

The authors would like to acknowledge the financial support of FAPESP (2015/21395-9), CNPq and CAPES.

Additional information

Funding

This work was supported by the Fundação de Amparo à Pesquisa do Estado de São Paulo [2015/21395-9];