Optimized technology of obtaining biofertilizers based on sewage sludge

Abstract

Goal. To develop an optimized technology for the production of biofertilizers based on sewage sludge (SS) of biological treatment plants (BTP) “Pivdenna” and “Pivnichna” (Odessa) with the participation of microorganisms with phosphate-mobilizing properties. Methods. Generalization and analysis of research materials on biofertilizer production technologies, the calculation method of carbon/nitrogen ratio in composted substrates, agrochemical methods of biofertilizer research. Results. Optimized technology of producing biofertilizers involves composting SS with plant fillers with the inclusion in the technological process of a new biotechnological element — the introduction of a new strain of Microbacterium barkeri LP-1, which was isolated from SS of BTP Odessa with high phosphate-mobilizing properties. Conclusions. According to the results of research, the optimized technology of composting of municipal solid waste with carbonaceous plant fillers in the form of solid waste from agricultural production (winter wheat straw, sunflower seed husk) with the inclusion of a new biotechnological element – the introduction of a new strain of Microbacterium barkeri LP-1 with phosphate-mobilizing properties in the technological process, which allows managing the processes of composting waste (accelerate them) and ensures the improvement of the quality of the finished compost.