Matukhno O. The increasing ecological safety of processes regeneration and neutralization of waste acidic electrolytes.

The object of study - ecological safety of processes of neutralization and regeneration of waste acid electrolytes. Purpose: To improve the scientific basis of environmental security processes of neutralization and electrochemical regeneration of waste acid electrolytes. Research methods: chemical analysis, the method of electron paramagnetic resonance (EPR), mathematical modeling, correlation and regression analysis, risk analysis, the method of expert evaluations. Theoretical and practical results: theoretically proven and developed method for rapid determining of the activity of lime hydration with EPR; proposed method for two-step neutralization of acidic spent electrolyte, that allows to neutralize some types of wastes and reduce the amount of sludge; developed method and apparatus for electrochemical regeneration that reduces energy consumption; developed recommendations for evaluating integral indicator of risk and severity, usage of these recommendations revealed that the regeneration process is more secure than neutralization. Three patents for inventions in Ukraine were obtained according to the results of the study. The novelty: scientifically proved, developed and proposed method of electron paramagnetic resonance evaluation of the active calcium oxide in a neutralizing agent - lime. Theoretically justified and experimentally confirmed crystal-chemical transformations in the structure of lime due to its interaction with atmospheric moisture. Was found that the overall risk profile for the environment is less for the regeneration than neutralization. For the first time was assessed the environmental risk and the integral indicator of risk for neutralization and regeneration processes. The results accepted for the introduction of JSC "Dneproshina". The results can be used in other enterprises, where acidic waste water is produced.