Nester A. Scientific bases of level of galvanic production ecological safety elevation

Nester A.A. Scientific bases of level of galvanic production ecological safety elevation. - Qualifying scientific work on the rights of the manuscript. Thesis for a Doctor’s Degree in Technical Sciences. Speciality 21.06.01 - ecological Safety. - State Ecological Academy of Postgraduate Education and Management, Kyiv, 2021. Scientific bases have been developed and parameters for creation of the automated equipment of clearing of water solutions, reuse of sewage have been defined. The theoretical bases of ecological safety elevation of places of boards manufacturing have been substantiated. The assessment of the level of risks of environmental pollution in the locations of galvanic shops and board production has been performed. The forecast of soil and rock contamination in the territory of sludge storage has been fulfilled. The influence of technogenic elements on the quality of the environment has been established. The engineering ways of environment ecological safety elevation have been planned. Methods and technologies of water treatment, pickling solutions, washing waters have been developed to ensure the introduction of systems of sharp reduction of water use in the processes of printed circuit board processing, electroplating, utilization, reuse of captured copper for metallization. Conditions of tin coating process check-up in lines with aqueous solutions by chronovoltammetric and chronopotentiometric methods for automation of board etching process have been found. Schemes have been offered. Processes of cessation of washing sewage of processes of cadmium and other heavy metals in installation with use of a fluidized layer of current-carrying parts for treatment of washing sewage with small concentrations have been tested. A mathematical model of the wastewater filtration process with constant and variable concentrations of impurities through porous media with decreasing velocity, which are sent to restore the initial qualities of the pickling solution, and an equation for determining the time of protective action of the filter have been created. A method of changing the redox potential has been proposed, which allows intensifying the process of reduction of aqueous solution due to increasing the yield of copper at the cathode current and reducing the amount of aqueous etching solution supplied for reduction, to reduce the cost of processing aqueous copper chloride solutions. On the basis of the offered decisions ecologically safe, energy saving technologies of system of circulating water supply have been developed Key words: ecological safety, industrial sewage, waste, galvanic production, heavy metals, regeneration, printed circuit boards, utilization, metallization.