Abstract
Changes in the chemical composition of cotton plant stems used as a substrate for solid-phase cultivation of the fungus Panus tigrinus were studied as well as the effect of these changes on properties of the pressed materials made of these stems. During the first 3 days of growth, the fungus better consumed cellulose; then, the rate of cellulose consumption was comparable with that of lignin. Intensity and pattern of these changes depended on the age of inoculum. The rate of cotton plant waste biodegradation was higher when a 3-day-old incoculum was used. The pressed materials made of the raw stuff treated with a 3-day-old inoculum of P. tigrinus for 2-3 days displayed better characteristics. Annually, large amounts of lignocellulose stuff is lost while processing of agricultural waste: straw, awn, plant stems, etc. In the countries with developed cotton growing, the annual amount of only guza-paya (dry cotton plant stems) reaches several million tons. To solve this problem, bioconversion of these wastes is studied to manufacture useful products and materials.
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