Comparison and Optimization of Saccharification Conditions of Alkaline Pre-Treated Triticale Straw for Acid and Enzymatic Hydrolysis Followed by Ethanol Fermentation

Rafał Łukajtis, Karolina Kucharska, Iwona Hołowacz, Piotr Rybarczyk, Katarzyna Wychodnik, Edyta Słupek, Paulina Nowak and Marian Kamiński
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Rafał Łukajtis: Faculty of Chemistry, Department of Chemical and Process Engineering, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
Karolina Kucharska: Faculty of Chemistry, Department of Chemical and Process Engineering, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
Iwona Hołowacz: Faculty of Chemistry, Department of Chemical and Process Engineering, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
Piotr Rybarczyk: Faculty of Chemistry, Department of Chemical and Process Engineering, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
Katarzyna Wychodnik: Faculty of Chemistry, Department of Chemical and Process Engineering, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
Edyta Słupek: Faculty of Chemistry, Department of Chemical and Process Engineering, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
Paulina Nowak: Faculty of Chemistry, Department of Chemical and Process Engineering, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland
Marian Kamiński: Faculty of Chemistry, Department of Chemical and Process Engineering, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233 Gdańsk, Poland

Energies, 2018, vol. 11, issue 3, 1-24

Abstract: This paper concerns the comparison of the efficiency of two-stage hydrolysis processes, i.e., alkaline pre-treatment and acid hydrolysis, as well as alkaline pre-treatment followed by enzymatic hydrolysis, carried out in order to obtain reducing sugars from triticale straw. For each of the analyzed systems, the optimization of the processing conditions was carried out with respect to the glucose yield. For the alkaline pre-treatment, an optimal catalyst concentration was selected for constant values of temperature and pre-treatment time. For enzymatic hydrolysis, optimal process time and concentration of the enzyme preparation were determined. For the acidic hydrolysis, performed with 85% phosphoric acid, the optimum temperature and hydrolysis time were determined. In the hydrolysates obtained after the two-stage treatment, the concentration of reducing sugars was determined using HPLC. The obtained hydrolysates were subjected to ethanol fermentation. The concentrations of fermentation inhibitors are given and their effects on the alcoholic fermentation efficiency are discussed.

Keywords: lignocellulosic biomass; enzymatic hydrolysis; acid hydrolysis; alkaline pre-treatment; optimization; Box-Behnken design; bioethanol fermentation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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