Abstract
The goal hereof is to study the process of preparing high-concentration biologically toxic wastewaters for biological treatment. To attain this goal, the following was analyzed: (a) the composition of wastewaters from an operating enterprise; (b) the methods used to treat wastewaters of similar composition; (c) organic substances contained in wastewaters and how they could be removed by extraction. It is shown herein that the wastewater organics can be separated into another phase by reducing pH-altering acidification through introducing concentrated mineral acids into the wastewaters at room temperature and intensive mixing. In addition, the method of extraction was used for a more complete removal of organic substances isolated from the water phase. In this process the extractant in the amount of 5% out of the total wastewaters volume was used. The research quantified the biodegradation-enabling wastewater impurities.
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