2024/11/13 by Markin, V. V., Golovatenko, E. L.
#building materials #cement #concrete #disposal #dolomite #fertilizer #melioration #processing #screenings #sewage sludge #waste #water purification #бетон #доломит #мелиорация #обработка #осадки #отсев #отход #очистка воды #сточные воды #строительные материалы #удобрение #утилизация #цемент
paper · doi:10.71536/vd.2024.5c169.5
During the extraction and processing of dolomite rocks, a large amount of screenings with a grain size of less than 5…20 mm is formed. The screenings are not subsequently used, but stored on the territory of mining enterprises, turning into waste, occupying large areas and polluting the environment with dust. The amount of screenings is 20…40 % of the volume of mined raw materials. Dumps of rock screenings occupy up to 15…20 % of the area of enterprises. To increase the level of resource conservation and prevent environmental pollution, it is necessary to involve this waste in economic circulation as a secondary resource. This paper provides a detailed analysis of the latest research and developments in the field of recycling dolomite plant waste: use as raw material in the production of building materials (concrete, hyper-pressed products, binders), ceramics, material for water treatment, melioration and fertilization of soils. Based on the analysis, a new method of waste disposal is proposed and substantiated – treatment of municipal wastewater sludge with burnt screenings, which will allow for the disinfection of sludge and the production of a complex organomineral fertilizer with a high content of organic matter, nitrogen, phosphorus, calcium and magnesium.