Ethanol, methane, or both? Enzyme dose impact on ethanol and methane production from untreated energy crop switchgrass varieties

Basar I. A., Unsar E. K., Unyay H., Perendeci N. A.

RENEWABLE ENERGY, vol.149, pp.287-297, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 149
  • Publication Date: 2020
  • Doi Number: 10.1016/j.renene.2019.12.025
  • Journal Name: RENEWABLE ENERGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Communication Abstracts, Compendex, Environment Index, Geobase, Greenfile, Index Islamicus, INSPEC, Pollution Abstracts, Public Affairs Index, Veterinary Science Database, DIALNET, Civil Engineering Abstracts
  • Page Numbers: pp.287-297
  • Keywords: Biofuel production, Enzyme dose, Ethanol and Methane, CORN STOVER, PANICUM-VIRGATUM, BIOETHANOL PRODUCTION, ANAEROBIC-DIGESTION, ACID PRETREATMENT, RICE STRAW, BIOMASS, BIOENERGY, SACCHARIFICATION, FERMENTATION
  • Akdeniz University Affiliated: Yes

Abstract

The production of bioethanol and subsequent methane from two raw switchgrass varieties with the addition of cellulase and beta-glucosidase dose combinations was investigated in this study. Maximum ethanol production increment for the investigated varieties, Shawnee and Kanlow, were determined as 211.9% and 166.7%, respectively, compared to the control assays without enzymes. Considering higher ethanol production a priority, 42.0 mg EtOH/gVS and 223.5 mLCH(4)/gVS were produced from Shawnee variety at 50 EGU cellulase - 80 IU beta-glucosidase doses. 20.2 mgEtOH/gVS, and 400.7 mLCH(4)/gVS were produced from Kanlow variety at 75 EGU cellulase - 80 IU beta-Glucosidase doses. Furthermore, the highest total biofuel energy productions were found as 10750,9 MJ/tonne field dried switchgrass at 75 EGU cellulase - 20 IU beta-glucosidase doses for Shawnee and 13556,9 MJ/tonne field dried switchgrass at 75 EGU cellulase 80 IU beta-glucosidase doses for Kanlow. Shawnee variety was found to be more suitable for cellulosic ethanol production. (C) 2019 Elsevier Ltd. All rights reserved.