Ethanol production from hazelnut shells through enzymatic saccharification and fermentation by low-temperature alkali pretreatment

HOŞGÜN E. Z., BERİKTEN D., KIVANÇ M., BOZAN B.

FUEL, vol.196, pp.280-287, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 196
  • Publication Date: 2017
  • Doi Number: 10.1016/j.fuel.2017.01.114
  • Journal Name: FUEL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.280-287
  • Keywords: Hazelnut shells, Ethanol, Lignocellulose, Alkali pretreatment, Enzymatic hydrolysis, Fermentation, Energy consumption, BIOETHANOL PRODUCTION, LIGNOCELLULOSIC BIOMASS, ENERGY-CONSUMPTION, HYDROLYSIS, BIOCONVERSION, TECHNOLOGY, FUEL
  • Anadolu University Affiliated: Yes

Abstract

Low-temperature sodium hydroxide (NaOH) pretreatment, enzymatic saccharification and ethanol fermentation were evaluated for hazelnut shell cellulose to fermentable sugars and ethanol. Maximum glucose recovery (48.33 g/100 g cellulose) was achieved with 6% NaOH for 72 h and at 1/10 solid/liquid ratio. At these conditions, 41.18% of lignin was removed. The theoretical ethanol yield (ethanol produced/potential glucose in biomass) was 40.71%, overall process efficiency was 37.73 g/kg biomass, ethanol productivity and fermentation efficiency were 0.115 g/(L h) and 96.7%, respectively. Total energy consumed for the low-temperature-long-residence-time alkali process was 34.8 Mj/kg untreated hazelnut shells. Pretreatment time has a significant effect on thermal energy consumption for the low-temperature alkali process. (C) 2017 Elsevier Ltd. All rights reserved.