SU1527176A1 - Method of purifying waste water from admixtures - Google Patents

Abstract

The invention relates to methods for the purification of wastewater from sorption by impurities and can be used in the textile and chemical industry in the treatment of wastewater from non-ferrous metal ions and organic impurities. The aim of the invention is to increase the degree of purification simultaneously from petroleum, copper and zinc. The method involves treating wastewater with a mixed ash sorbent with a particle size of 40-160 µm, slag with a particle size of 300-1500 µm and sawdust, taken in a ratio of (1-3): (3-1): 1. The method allows to achieve a degree of purification for petroleum products of 99.3-100%, copper 100%, zinc 100%, against 96.4, 93.2, 84.6%, respectively, by a known method. 2 tab.

Description

The invention relates to a method for treating wastewater and can be used in textile, chemical and other industries in the treatment of wastewater from non-ferrous ions and organic impurities.

The purpose of the invention is to increase the degree of water purification from oil products, copper and zinc.

Example 1. Take 10 l of the test solution. The ratio in the mixed sorbent of ash, slag and sawdust is 1: 3: 1. All components are mixed to obtain a uniformly distributed sorbent. The content of impurities in purified solutions (pH 9.2), mg / l: organic impurities 35; copper 8; zinc 12. The mixed sorbent is placed on a 100 ml sorption column, and the solution to be purified is passed through the sorbent from bottom to top. The contact time of the solution to be purified with the mixed sorbent is 2 minutes. Filtration rate 0.36 l / min. Sorbent capacity 360 mg / l. The method is carried out under dynamic conditions until metal ions slip into the solution. The degree of purification from copper 100%, from zinc - 100%.

Example 2. Take 10 l of a solution containing impurities (pH 8.9), mg / l: copper II, zinc 10; organic impurities 39. The sorbent consumption is 100 g. The ratio of ash and galaxy is 1: 1. Ash, slag, and sawdust are mixed to form a porous filter mass. The mixed sorbent is placed in a sorption column and the solution to be purified is passed through it from the bottom to the bar. The filtration rate is 36 specific volumes per volume of sorbent per hour. The degree of purification from copper is 100%, from cnn-, ka - 100%, from organic impurities U0%.

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In tab. 1. The results of wastewater purification containing 32 mg / l of organic pollutants, 10 mg / l of copper and 12 mg / l of zinc are proposed.

in a way.

From tab. 1, it follows that an increase in the degree of purification at the same time by impurities Oil, copper and zinc in comparison with the known method is achieved only with the ratio of ash: slag: sawdust in the interval (1-3) :( 3-1): 1.

The choice of the range of sorbent ratios is determined by their physical state. If the ratio of the components in the feed is 5: 1: 1, the filtration rate decreases significantly and the filter time increases. cycle. An increase in the slag component to 1: 4: 1 does not affect the degree of purification, however, the separation of the sorbent is observed.

Table 2 shows the effect of loading particle size on the degree of purification. Initial waste water, contains, mg / l: oil 36; copper 10; zinc 1I.

From the data obtained, it follows that the degree of purification simultaneously from oil, copper and zinc, compared with the known method, is only

ko when using ash with a particle size of 45-160 microns, and slag with a particle size of 300-1500 microns. The presence of finer ash leads to clogging of micropores and a decrease in its sorption capacity. Slag in the specified interval has the maximum number of open pores and the content of underburning.

Thus, the proposed method allows to achieve 99.3-100% purification from oil, copper and zinc against 84.6-96.4% by a known method.

Claims (1)

15 claims A method for purifying wastewater from impurities, which includes treatment with a mixed sorbent containing sawdust and a carbon-containing mineral component, characterized in that, in order to increase the degree of purification simultaneously from petroleum products, copper and zinc, slag from stone burning is used as a carbon-containing mineral component. coal with a particle size of 300-1500 microns and ash with a particle size of 45-160 microns, and the treatment is carried out at a mass ratio of ash: slag: sawdust, equal to (1-3) :( 3-1): 1. Table 1 57.5 100 100 100 100 84.6 Compiled by V.Vinogradov Editor N. Yatsola Tehred M. Khodanych Order 7472/30 Circulation 828 Subscription VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and publishing plant Patent, Uzhgorod, st. Gagarin, 101 Proofreader M.Maksimiyiets