Paper details

Title:

Ethanol Production from Kraft Pulp

Author(s):

Hasegawa, F., Yokoyama, S., Imou, K., Yano, S.

Document(s):

Abstract:

One of the most common and viable methods to remove lignin from wood is kraft pulping, which is a well­developed technology used on a commercial scale. Although kraft pulp is essentially raw material for paper, 70% of plant availability is good enough to meet the current pulp demand in Japan. This means that more than two million ton of pulp can be produced without new equipments. We therefore investigated a bioethanol production process employing kraft pulping as pretreatment. In order to estimate the practical ethanol yield, a series of enzymatic hydrolysis and fermentation experiments using kraft pulp was carried out. Kraft pulp products showed sufficient digestibility for ethanol production even at a high substrate concentration (200 g/L). Thanks to this digestibility, low lignin and high polysaccharide content, the concentration of produced ethanol was over 6% at the high substrate concentration (200 g/L). The energy recovery rate in bioethanol production from oxygen delignified kraft pulp (OKP) was about 36% at the substrate concentration of 200 g/L. In this case, woody biomass was converted into not only bioethanol but also extra steam which can be supplied to paper making processes in the paper mill. We estimated ethanol production from surplus pulp production capacity in Japan based on the data in this study. More than one million m3 of ethanol per year can be produced from surplus pulp production.

Keywords:

bioethanol, energy balance, enzymatic hydrolysis, wood

Topic:

Processes for Fuels from Biomass

Subtopic:

Production and supply of second generation biofuels

Event:

19th European Biomass Conference and Exhibition

Session:

VP3.5.3

Pages:

2143 - 2147

ISBN-13:

978-88-89407-55-4

ISBN-10:

88-89407-55-7

Paper DOI:

10.5071/19thEUBCE2011-VP3.5.3

Price:

FREE