Studies of the features of vacuum drying of organic-mineral fertilizers

Abstract

Abstact The article presents the results of studies of drying of organic-mineral fertilizer. Drying options in various technological regimes are considered. Vacuum methods are used in drying materials because they provide good quality at high speeds. In this study, samples of organic-mineral fertilizers were dried at an absolute pressure of 65-75 Pa at a temperature of 50-70 ° C to assess the drying characteristics. The change in the mass proportion of water can be considered as one of the indicators of the effectiveness of vacuum drying of organic-mineral fertilizer. Optimal drying parameters were established when using a vacuum pump in a laboratory installation. The advantages of vacuum drying are revealed, consisting in reducing the process time by more than 2 times. The proposed model effectively predicts the moisture content in organic-mineral fertilizer during vacuum drying.

Нydrodynamics of filtration of heating agent through stationery layer of beet pulp

“…Сушіння переважно проводять із використанням сушильних газів. У великомасштабних сушильних агрегатах існує варіант комплексів підготовки сушильних газів та сушіння і грануляції мінеральних добрив [2]. Процес сушіння є найбільш енергоємним серед всіх технологічних процесів і тому, вибираючи технологію сушіння, особливу увагу доцільно приділити енергетичним показниками процесу.…”

Analysis of approaches to waste management of pig farms

“…Several publications [11][12][13][14] substantiated the rationality of the method of reagent treatment of pig waste to obtain organic mineral fertilizers. The effectiveness of their practical application in increasing the yield of agricultural crops is considered.…”