Investigation of technology for obtaining biofertilisers based on sewage sludge
2021
Krutyakova, V., Engineering and Technology Inst. “Biotechnicaˮ, Hlibodarske, Odessa reg. (Ukraine) | Pyliak, N., Engineering and Technology Inst. “Biotechnicaˮ, Hlibodarske, Odessa reg. (Ukraine) | Nikipelova, O., Engineering and Technology Inst. “Biotechnicaˮ, Hlibodarske, Odessa reg. (Ukraine) | Bulgakov, V., National Univ. of Life and Environmental Sciences of Ukraine, Kiev (Ukraine) | Rucins, A., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia) | Beloev, H., Angel Kanchev Univ. of Ruse (Bulgaria)
Substantiation of a technology for the production of biofertilisers, based on sewage sludge from the biological treatment plants with the participation of microorganisms, with phosphate-mobilising properties is an important scientific and technological problem. Agrochemical, microbiological, field, statistical studies were carried out, as a result of which there were elaborated technological stages of creating a biofertiliser, based on sewage sludge, obtained at biological treatment stations, with various fillers, with the participation of an active strain of Microbacterium barkeri LP-1. The technical parameters of this technology have been determined for the production of organic fertilisers. In the research process of the technology for the production of biofertilisers, fertilisers were obtained with the content of common forms: nitrogen – 21.7–30.7 g•kgE−1 (at a rate of 18–20 g•kgE−1 ); phosphorus – 14.4–33.2 g•kgE−1 (at a rate of 10–12 g•kgE−1 ); potassium – 5.7–11.5 g•kgE−1 (at a rate of 2–5 g•kgE−1 , the efficiency of which in a field experiment in growing corn for grain ranged from 31.6% to 50.0%. The developed technology makes it possible not only to utilise sewage sludge, but also to obtain biofertilisers in order to increase the soil fertility and productivity of agricultural crops.
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