Resource-saving technology for manufacturing of environmentally-friendly organic fertilizers

The relevance of the paper is determined by the lack of technology for disinfection and treatment of the produced liquid cattle manure in the arctic regions of Russia (the Sakha Republic (Yakutia)). The research objective is the development of technology for recycling of the cattle manure with resulting environmentally friendly organic fertilizers in biogas units. The technology allows agriculturalists to establish energy-saving self-contained manufacture. The primary research methods are the theory of similarity and experimental design theory, mathematical programming and simulation modelling methods. The Excel, Statistica 8, MathCAD programmes were used. The resource-saving technology for manufacturing biofertilizer from the cattle manure was developed, based on the mesophilic methanogenic microorganisms adapted to psychrophilic conditions. Thus, a psychrophilic anaerobic technology working steadily under low temperatures was obtained for the first time. Introduction of a new technology in agricultural enterprises of Yakutia enables to yield on average 4.659 tonnes of mineralized organic fertilizer daily; the expected amount of finance from the sale of organic fertilizers will make 0,056 min USD. The materials of the paper can be useful for students, lecturers and research scientists of natural and technical specialties, as well as for specialists of the agroindustrial complex and for farmers.