A by-product of soybean production, as a non-grain part of the crop, can be used to meet the needs of livestock in providing complete feeding of livestock. Pressing the floor allows to reduce the volume of plant material in order to reduce the cost of storage and transportation, improve the safety of its nutrients during long-term storage. Therefore, the development of an efficient, cost-effective and less energy-intensive technology and a process line for compacting the soybean floor by pressing is a promising direction. The pile of the floor is a complex mixture of particles of different sizes, as well as voids filled with air. Equipment compaction chaff should provide a stable preparation of pellets under all the fluctuations of the moisture content and fractional composition of chaff. In 2018, research experiments were carried out in the Far Eastern Scientific–Research Institute of Mechanization and Electrification of Agriculture to study the process of pressing the soybean floor, depending on its fractional composition and humidity, on the manufactured laboratory unit for compaction with the production of soybean floor briquettes. It was found that when the humidity of the sample increases from 9 to 21%, the energy consumption decreases by 17.1%. The coefficient of compaction of the floor when the humidity changes almost does not change. By increasing the length of the sex particles from 14 to 87 mm, the compaction coefficient increases by 73.3% and the energy intensity by 6.2 %. For transportation and storage of the soybean floor briquette, it is recommended to pack it tightly with polyethylene film or tie it with twine, this will increase the shelf life and eliminate losses.

This article presents the study of significant factors influence on the pelletizing process of soybean chaff. The aim of the research was to determine the operating modes of the screw providing chaff soybean pellets output with a crumbling of not more than 12% at the optimum pelletizing temperature of 70 — 80°C. To study the significant factors influence - such as the flight screw step, the screw rotation speed, chaff moisture - on the process of soybean chaff pelletizing, as well as the optimal values variation of these factors, search experiments were conducted on the screw type laboratory pelleting press XP-3. Regression equations were calculated as a result of the studies, which are adequately describing the influence of significant factors on the output of proper quality pellets; this will allow to develop the technology for chaff compacting in the process of stationary processing of the grain and soybean heap, which allows to reduce the costs of transportation and storage of soybean chaff.