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Title: Bioconversion of wheat bran for polygalacturonase production by Aspergillus sojae in tray type solid-state fermentation
Authors: Demir, Hande
Tarı, Canan
Keywords: Aspergillus sojae
Solid-state fermentation
Tray type fermentation
Wheat bran
Issue Date: Jan-2016
Publisher: Elsevier Ltd.
Source: Demir, H., and Tarı, C. (2016). Bioconversion of wheat bran for polygalacturonase production by Aspergillus sojae in tray type solid-state fermentation. International Biodeterioration and Biodegradation, 106, 60-66. doi:10.1016/j.ibiod.2015.10.011
Abstract: Wheat bran was tested as the solid substrate for the tray-type solid-state fermentation (SSF) production of polygalacturonase (PG) enzyme by A. sojae mutant strain - a high-PG activity producer. PG production of A. sojae was found to reduce as the thickness of the substrate increase from 8 mm to 14 mm at 90% relative humidity. An interaction between the thickness of the bed and relative humidity of the environment was determined with the help of experimental design and statistical analysis tools. As a result, the PG activity could be enhanced by 31% as the process conditions optimized. Additionally, 11 mm thickness and 70% relative humidity were selected as the PG production favoring conditions with the maximum PG activity of 298 U/g substrate in tray type of SSF without the addition of any nutritive or inducing supplements into wheat bran. The kinetic study conducted in the trays revealed the presence of reduction in the water activity on the 4th day of the SSF process under stated conditions. The productivity of the process conducted under optimized conditions was 3.41 U/g substrate-1 h-1 for the 4th day of the SSF. © 2015 Elsevier Ltd.
ISSN: 0964-8305
Appears in Collections:Food Engineering / Gıda Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
Sürdürülebilir Yeşil Kampüs Koleksiyonu / Sustainable Green Campus Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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