No abstract

The article is devoted to improving the method of testing the wear resistance of friction pairs in a wide range of hardness by embedding a roller into a flat surface of the material under study (sample), first proposed by M. V. Lomonosov. The formula for estimating the volumetric wear resistance from linear depending on the specific pressure is proved. According to the new method, the relative wear resistance of materials in a wide hardness range was evaluated.

The rural areas of Russia are characterized by a great variety of natural conditions, depending on their geographical location. This determines the historical economic use of these areas and hence the formation of certain types of agro-ecosystems. The rapid growth of cities in some regions of Russia has led to a marked disruption of life-supporting processes in the surrounding natural ecosystems, as well as in rural areas adjacent to cities and their agglomerations. From this point of view, it is important to find models for ecologically balanced rural development. Compared to “organic agriculture”, it is a broader concept that may be closer to “sustainable” agriculture.

No abstract

To produce fuel briquettes from the waste of the biological processing process, this biomass is pre-dried and pressed into briquettes. Subsequently, prepared fuel briquettes are used for heating residential premises and factory workshops. The aim of the study was to develop a technology for producing briquettes from biomass with specified characteristics. Basic technical specifications for oil palm biomass compression are determined, based on certain variables to be monitored in the manufacture of briquettes from this material. Briquettes were manufactured under certain conditions. The briquettes were tested. According to the test result, a correlation has been established between the initial data (fiber length, relative humidity of raw materials and compression time) and the results obtained (compression strength, durability and volumetric density). Biomass with a relative humidity of not more than 8% has been determined to be used in the production process. The ideal values for quantitative variables have been established: relative humidity of the air 8%, fiber length 85 mm and compression time 20 s.