Yakhnenko O. Environmentally safe utilization of phosphogypsum in air protection technologies

This thesis is devoted to reducing level of technogenic impact on the environment due to creation of ecological safety technology of phosphogypsum utilization as a mineral carrier in air protection technology. The technological system was developed with effective purification of sulfur-containing gas stream. The ecological and hygienic assessment of the phosphogypsum dumps impact on natural components and the formalization of the main areas of influence were implemented. Optimal ecological-biochemical and physical-chemical characteristics of modified phosphogypsum granules were determined. The author conducted the modeling of optimal physical-chemical parameters of biodesulfurization systems using the load of phosphogypsum to achieve purification efficiency higher then 95 %. The author developed the technological application of phosphogypsum utilization and the method of engineering design of structural and technological parameters of the aerobic installation.