JUSTIFICATION OF RATIONAL OPTIONS FOR APPLICATION OF TECHNICAL MEANS FOR THE PREPARATION OF COMPOST MIXTURE

Abstract

The goal of the research was to increase the efficiency of compost production from organic raw materials of agroecosystems through the development and implementation of scientifically based complex technical and technological solutions under conditions of accelerated aerobic fermentation. Four operating schemes of rotary drum-blade devices were chosen for research: single- and double-drum aerator, single- and double-drum PRT. The interrelationship between the parameters of the mechanized composting process and the design of the working bodies for the purpose of ensuring the set tasks has been established. In general, the process of functioning of the working body is divided into three processes, which are performed in a complex: loosening (shredding) or separation of shavings (particles) from the total mass, mixing and molding of the edge. The results of the experiments show better indicators of mixing quality and homogeneity for the M-shaped arrangement of the blades on the drum compared to the L-shaped one. The consumed power is less for the L-shaped arrangement of the blades. The conclusions are objective, regardless of the type of raw material and the height of the placement of the working body in relation to the side. As a result of the conducted theoretical and experimental studies, rational options for the use of technical means of compost mixture preparation are substantiated. Under the condition of ensuring the maximum homogeneity of the compass mixture, the largest value of the edge structure index and the minimization of energy consumption: – when processing chicken litter based on sunflower husk (ρ = 360–450 kg/t3, W = 32–44%, Mgran < 2123 t) it is advisable to use a device based on PRT-10 with one L-shaped working body; – when processing chicken litter based on sunflower husks (ρ = 360–450 kg/t3, W = 32–44%, Mgran > 2123 t) it is advisable to use a device based on an aerator with two L-shaped working bodies; – when processing chicken bedding straw cattle manure (ρ = 680–750 kg/ t3, W = 42–66%, Mgran < 2123 t) it is advisable to use a device based on PRT-10 with two L-shaped working bodies; – when processing chicken bedding straw cattle manure (ρ = 680–750 kg/ t3, W = 42–66%, Mgran > 2123 t) it is advisable to use a device based on an aerator with one M-shaped working body.