Kanda M. Ensuring environmental safety in the area of impact of poultry farming

The dissertation research provides a solution for the topical scientific and practical problem in the area of impact of poultry farms by adding a mixture of natural dispersive sorbents to litter. Application of organic-mineral fertilizer obtained as a result is one of the ways to ensure environment-friendly and resourse-saving process of cultivation of agricultural crops. The paper identifies the sources of environmental hazard in the area of impact of poultry farms in Ukraine and evaluates the reduction of environmental hazard of pollution with ammonium compounds as a result of application of mixed natural sorbents to litter. The processes of ammonia sorbtion from poultry droppings by natural sorbents and technological aspects of production of organic-mineral granular fertilizer have been studied both experimentally and theoretically. In order to find the optimal conditions for ammonia sorbtion, we determined dependence of the process on the size of a sorbent grain, temperature conditions, phase contact duration, a structural type of mineral sorbent, and the optimal proportion of components of the study composition. We presented a process flow diagram for production of organicmineral fertilizer on the basis of chicken manure, and substantiated the parameters of technological process of its production. We determined influence of the study composition on change of pH and the concentration of primary plant nutrition elements depending on a soil type. Also, we conducted research-commercial tests of the application technology and agrochemical tests of the obtained organic-mineral fertilizer. Key words: environmental hazard, ammonia, poultry house, litter, natural sorbents, clinoptilolite, palygorskite, technology, organic-mineral fertilizer.