Abstract
In order to obtain new strains of cellulolytic microorganisms for use in technologies for processing plant and other cellulose-containing waste, four new bacterial strains of the genus Streptomyces have been isolated from various sources. In tests with Congo red, the isolates’ ability to degrade carboxymethylcellulose (CMC), microcrystalline cellulose (MCC) and natural cellulose–containing materials – straw, birch and oak sawdust was determined. The activity of cellulase was quantified during fermentation of straw. On media with each of the model carbon sources, the radial growth rate was determined as an indicator characterizing the ability of isolates to colonize various substrates. The conjugate characteristic of cellulase activity and radial growth rate on substrates of various natures made it possible to assess the prospects for further use of the studied strains as destructors of cellulose-containing waste. The strain Streptomyces thermocarboxydus T1-3 was the leader in the studied sample, characterized by the most active enzymatic hydrolysis of all model cellulose sources, a high radial growth rate (up to 87±3 microns/hour), and the achievement of maximum cellulase activity (171.25±8.13 U/ml) during straw fermentation within 24 hours.
Published Version
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