The importance of rational use of waste from the processing of grapes, fruits, sugar beets and grain crops in the preparation of high-grade feed is noted. In this regard the relevance of the development of effective technical means for mixing liquid or pasty additives with traditional feed is emphasized. An experimental feed mixer with the ability to produce feed mixtures using secondary raw materials of various aggregate states has been developed. The task of the experimental work was to study its performance under various operating modes. As a result of laboratory studies, it was found that with an increase in the rotational speed of the working body from 60 to 120 min-1 the productivity of the experimental feed mixer increased from 2,0 to 3,3 t/h. With the subsequent decrease in the amplitude of oscillations of the inter-screw cavity (with a decrease in its volume) the increase in productivity slows down.

Using the theory of oscillations of theoretical mechanics, a method has been developed for calculating the parameters of a selected massager cage. The resulting equations allow one to select the main operating parameters of the massager, to calculate their effective values.

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An analysis of the projects for the utilization of bird droppings is carried out, a model of a multi-level process of technological design with a choice of an erroneous solution at every step is presented.