Salim AA, Grbavčić S, Šekuljica N, Vukašinović-Sekulić M, Jovanović J, Jakovetić Tanasković S, Luković N, Knežević-Jugović Z. Enzyme production by solid-state fermentation on soybean meal: A comparative study of conventional and ultrasound-assisted extraction methods.
Biotechnol Appl Biochem 2019;
66:361-368. [PMID:
30694578 DOI:
10.1002/bab.1732]
[Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 01/25/2019] [Indexed: 01/19/2023]
Abstract
Protease, cellulase, and α-amylase producing Bacillus subtilis strain was cultivated by solid-state fermentation technique using soybean meal as a substrate. The aim of the present study was to establish a highly efficient enzymes' extraction method as a first stage in downstream processing. The conventional extraction procedure was optimized by determining pH, stirring rate, solid/liquid ratio, and time of extraction on enzymes' recoveries from fermented soybean meal. Yields of leached enzymes were compared to the amounts of enzymes that are achieved with ultrasound-assisted extraction (UAE). UAE was established to be superior method for obtaining higher yields of proteases (up to 330 IU) and α-amylases (825 IU), under significantly shorter extraction time and gaining more concentrated product. However, the obtained model predicts that conventional process led to a product with a higher cellulolytic activity (≥7.5 IU).
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