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HUDEČKOVÁ, H. ŠUPINOVÁ, P. BABÁK, L.
Original Title
Optimization of Enzymatic Hydrolysis of Waste Bread before Fermentation
Type
journal article in Scopus
Language
English
Original Abstract
Finding of optimal hydrolysis conditions is important for increasing the yield of saccharides. The higher yield of saccharides is usable for increase of the following fermentation effectivity. In this study optimal conditions (pH and temperature) for amylolytic enzymes were searched. As raw material was used waste bread. Two analytical methods for analysis were used. Efficiency and process of hydrolysis was analysed spectrophotometrically by Somogyi-Nelson method. Final yields of glucose were analysed by HPLC. As raw material was used waste bread from local cafe. Waste bread was pretreated by grinding into small particles. Hydrolysis was performed in 100 mL of 15 % (w/v) waste bread particles in the form of water suspension. Waste bread was hydrolysed by two commercial enzymes. For the liquefaction was used α‑amylase (BAN 240 L). The saccharification was performed by glucoamylase (AMG 300 L). Optimal conditions for α‑amylase (pH 6; 80 °C) were found. The yield of total sugars was 67.08 g∙L-1 (calculated to maltose). As optimal conditions for glucoamylase (pH 4.2; 60 °C) were found. Amount of glucose was 70.28 g∙L1. The time of waste bread liquefaction was 180 minutes. The time of saccharification was 90 minutes. The results were presented at the conference CECE Junior 2014.
Keywords
ethanol, waste bread, enzymatic hydrolysis, amylases, alpha-amylase, glucoamylase, pH, temperature
Authors
HUDEČKOVÁ, H.; ŠUPINOVÁ, P.; BABÁK, L.
Released
28. 2. 2017
Publisher
Mendel University Press
Location
Brno
ISBN
1211-8516
Periodical
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis
Year of study
65
Number
1
State
Czech Republic
Pages from
35
Pages to
40
Pages count
6
URL
https://acta.mendelu.cz/65/1/0035/
Full text in the Digital Library
http://hdl.handle.net/11012/68379
BibTex
@article{BUT133640, author="Helena {Hudečková} and Petra {Šupinová} and Libor {Babák}", title="Optimization of Enzymatic Hydrolysis of Waste Bread before Fermentation", journal="Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis", year="2017", volume="65", number="1", pages="35--40", doi="10.11118/actaun201765010035", issn="1211-8516", url="https://acta.mendelu.cz/65/1/0035/" }