Abstract
The production of sapropel fertilizer is a multi-stage process, which requires taking into account the influence of various parameters on the yield of the final product. In this regard, it became necessary to optimize the modes of obtaining sapropel product from bottom sediments of eutrophic lakes. Using ultrasonic exposure in the technology of sapropel production, which consists in extracting bottom sediments with water, separating, filtering and concentrating the finished product. The analysis of the effect of the extraction duration, mixing rate, temperature and mass ratio of the phases of the bottom suspension on the concentration of the solution was carried out. It is proved that the use of ultrasonic cavitation at the extraction stage increases the yield of the sapropel product by 1.7 times. The derived mathematical models of the processes of obtaining a sapropel product under cavitation and in the absence of it allow us to determine the optimal input parameters to ensure maximum yield of the sapropel product. From a practical point of view, this will positively affect the quality of the resulting innovative environmentally friendly sapropel fertilizer. In turn, this will manifest itself in greater efficiency of pre-sowing seed treatment, by increasing the qualitative and quantitative properties of the nutrients contained in sapropel fertilizer. This will subsequently affect higher crop yields.