SU986862A1 - Method for purifying effluents from accompanying impurities - Google Patents

Description

(54) SLOSYUB TREATMENT OF WASTE WATER FROM SUPPORTING IMPURITIES

one

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

A known method of sewage treatment, containing non-ferrous metal ions, as well as petroleum products. And organic impurities using a rubber band. The rubber can be used for wastewater treatment, containing not more than 15 mg / l of copper and 6.0 mg / l of zinc, as well as 12 mg / l of petroleum products. The consumption of crumb rubber is 10–20 g / l with a contact time of 24 h Cl3.

However, the degree of purification from copper in a known manner is 20%, from zinc - 7O%. In addition, the disadvantage of this method is the reduction of organic impurities.

The closest to the proposed technical essence and the achieved result is a method of purification of waste water from accompanying impurities by treating them with a mixed sorbent containing chip-sawdust charge and sulfone coal at a ratio of sulfone coal and with pipe-sawdust material 1: 2 C2.

The disadvantages of this method are the low degree of purification from accompanying impurities (70 - 74%).

The purpose of the invention is to increase the degree of water purification.

fO

Goal Achieved Achieved by the described method of wastewater purification from accompanying impurities by treating them with a mixed sorbent containing ash and rubber crumb in cooi

15 from 1 to 4 to 4 to 1 The difference of the proposed method lies in the fact that the treatment is carried out with a mixed sorbent containing ash and rubber crumb in a ratio from 1: 4 to

20 4: 1.

1 The ashes and crumb rubber used in the proposed method are waste products. The composition of ash

silicon oxides,. aluminum, sodium and potassium, - providing deep cleaning of water from ions of non-ferrous metals and organic impurities. Rubber crumb mainly consists of rubber and soot with sorption properties.

This set of element oxides, as well as the mixing of ash and crumb rubber to obtain a uniform porous filter mass, provides deep purification (100%) of waste water from oil products and ions (heavy metals, at the same time as separate application of these materials) water at 60 - 7O%. Uniform mixing of ash and rubber crumb allows to combine two stages of the process-sorption and filtration for non-porous inorganic materials. The choice of sorbent ratios is determined by the physical state It is necessary and sufficient to achieve the maximum degree of purification of the ratio of ash and crumb rubber from 1: 4 to 4: 1. If the ratio of sorbents in the mixture is 1: 5 (excess crumb rubber) during sorption, a sorbent separation occurs, Because of this, the degree of purification is insufficient, if more than one ash is in the mixture, i.e. 5: 1 mixture, then the purified solution is not filtered through this sorbent, so the degree of purification from copper is 37.5%, from a kick — 59 , 4% Example, Volume of the investigated solution Yul. The ratio of ash and rez new crumbs 1: 4 (1 part ash: 4

1: 58: 422.0

1: 41O: 4On / about.

1: 216: 34Н / обн.

1: 125: 25N / OB.

pieces of crumbs). Ash and crumb were mixed to obtain a uniform distributed mixed sorbent. The content of impurities in the purified solutions (pH 5.5): petroleum products 2OO mg / l, copper 20.0 mg / l and zinc 14.7 mg / l. The mixed sorbent is placed in a 100 ml sorption column, and the solution to be purified is passed through the sorbent from the bottom up. The contact time of the purified solution with the mixed sorbent is 5 minutes. Filtration rate 0.5 l / min. Sorbent capacity 200 mg / l. The method is carried out under the dominic conditions until the metal ions slip into the solution. The degree of purification from copper is 99.9%, from zinc - 100%. Example 2. The volume of the test solution Yul, the content of impurities in the solution is as follows (pH-7.2): organic i solvent 400 mg / l; copper 2O, mg / l; zinc 12.0 mg / l; zinc 12.0 mg / l. The consumption of the sorbent 50 g, the ratio of ash and fat crumb 1: 1. Ash and rubber crumb are pre-mixed to obtain a porous filtering mass. The mixed sorbent is placed in the sorbshyun column and the purified solution is passed up through it. The filtration rate is 20 beats. volumes of 1 volume of sorbent per hour. The degree of purification from copper 10O, 0% and zinc Yu0,0%. The table presents the results of wastewater treatment containing 300 mg / / l of petroleum products, 2O, O mg / l of copper and 16.5 mg / l of zinc, the proposed method.

Claims (2)

1. Wastewater treatment waste production.- Tsvetna metallurgists, № 3, 1978. 2. USSR author's certificate number 569546, cl. C 02 R 1/28, 1977 (prototype).