Investigation of sewage sludge for the purpose of their secondary use as agricultural fertilizer

Substantiated the possibility of using an optimized technology for processing sewage sludge in the production of agricultural fertilizers. The researches have been experimentally tested on a pyrolysis plant -a physical model assembled under laboratory conditions. Selected, calculated and experimentally confirmed the optimal composition of agricultural fertilizer based on sewage sludge. The suggestions allow to increase the production of mineral fertilizers and reduce the accumulation of sewage sludge in the sludge fields of treatment facilities of industrial enterprises.