Chernish E. Sewage sludge utilization by sulfidogenic association of microorganisms

This thesis is devoted to reducing level of technogenic impact on the environment due to creation of ecological safety technology of sewage sludge utilization, development of the technological system of anaerobic neutralization of sewage sludge together with phosphogypsum with deposition of heavy metals by biogenic hydrogen sulfide in a stable sulphide fraction.The author conducted the system analysis of the ecosystem sewage sludge transformations cycle in the direction of reducing technogenic impact on the environment. The biochemical and mathematical models of neutralization of sewage sludge together with phosphogypsum were described. Optimal regime-technological parameters of the system work were experimentally determined. The author developed the technological application of biosulfidogenic neutralization and the method of engineering design of structural and technological parameters of the anaerobic bioreactor.