SU1634646A1 - Method of cleaning sewage from tricresol - Google Patents

Abstract

The invention relates to methods for treating wastewater containing high homologous phenols of the homologous series — tricresol or xylenol — and can be used in wastewater ozone treatment technology. The purpose of the invention is to increase the degree of purification by ozonization of wastewater containing tricresol and wastewater containing xylenol without increasing the dose of ozone. The goal is achieved by introducing xylenol into the wastewater containing tricresol before ozonation in the following ratio, wt. %: tricresol 10-95; xylenol 5-900 Ireumschstza of the proposed sewage treatment method} containing heavy homologous phenols of tricresols and coilenols of the homologous series, consists in increasing the degree of purification of sewage and cheapening the method by using its wastewater without increasing - as a source of xylenol. no ozone consumption 1 tabs about 9 /)

Description

The invention relates to wastewater treatment methods by ozonation, in particular to wastewater treatment methods containing heavy homologous phenols, and can be used in wastewater treatment for tricresol and xylenol.

The aim of the invention is to increase the degree of purification by ozonization of wastewater containing tricresol

Xylenol is introduced into wastewater in the following ratio of components, wt%

Tricresol 10-95

Xylenol 5-90

To increase the effect of treating wastewater containing tricresol by ozonation, an increase in the ozone dose is required. However, if wastewater containing xylenol and wastewater containing tricresol, before ozonization, pre-mix in the following ratio of components, maso%: tricresol 10-95; xylenol 5-90, then the cleaning effect increases. Moreover, the dose of ozone remains the same.

The effect of cleaning wastewater containing tricresol and wastewater containing xylenol, with a dose of ozone of 1.06 mg / mol per mg / mol of disrepair, is 63 and 66.5, respectively, with a dose of ozone of 5.63 mg / mol per mg / mole of -. substances - 8 and 82%, When mixing wastewater containing xylenol and waste

with

four

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tricresol-containing waters at a ratio of 60:40, the cleaning effect at a dose of 1.06 mg / mol per mg / mol of ozone substance is 73% (versus 63 and 66.5%), with an ozone dose of 5.63 mg / mol per mg / mol substance is 86% (versus 81 and 82%) 0

For research, wastewater is taken, in which the initial concentration of xylenol and tricresol is 1200 mg / l in terms of phenol 50 ml of the studied waste water, is placed in a drexel and rinsed with ozone so that the amount of ozone in each series the experiences were the same

For the first series of experiments, the ozone dose was 1.06 mg / mol per mg / mol of the substance, for the second series of experiments it was 5.63 mg / mol per mg / mol of the substance

The effect of wastewater treatment is assessed by the decrease in the concentration of pollutants in terms of phenol

The results of the experiments are given in the table ,,

The table presents the results of testing the wastewater treatment method for wastewater with a concentration of from 15 to 1250 mg / l and the dose of ozone from 1806 to 5.63 mg / mol / mg / mol of the substance,

When the concentration of wastewater is more than 1200 mg / l, the effect of adding xylenol is insignificant

For the proposed wastewater treatment method, the ozone dose may be from 1.06 to 5.63 mg / mol of a substance, since with ozone doses of less than 1.06 and more than 5.63 mg / mol / mg / mol of a substance, the degree of wastewater treatment containing tricresol without impurities, differs slightly from the degree of wastewater treatment containing tricresol with the addition of xylenol

The advantage of the proposed method of treating wastewater containing heavy phenols of homologous type of tricresol and xylenols is to increase the effect of wastewater treatment without increasing ozone consumption, which reduces the cost of treatment.

Claims (1)

Invention Formula The method of treating wastewater from tricresol by ozonation, characterized in that, in order to increase the degree without increasing the ozone consumption, xylenol is preliminarily introduced into the wastewater in the following ratio of components, wt%: Tricresol10-95 Xylenol5-90