SU1308562A1 - Method of removing petroleum products,suspended and surface-active substances from sewage - Google Patents

Abstract

The invention relates to the technology of wastewater treatment, can be used in the treatment of industrial wastewater of complex composition containing fine impurities, petroleum products, unsaturated hydrocarbons, synthetic surfactants - detergents and fatty acids, and allows you to increase the degree of purification from surfactants while maintaining a high degree of purification from suspended substances and petroleum products. According to the proposed method, wastewater is purified by electroflotation in the presence of organic reagent - sediment of press filters formed during the purification of wastewater produced by polymethyl (ethyl) siloxane liquids with burnt lime and magnesite, followed by filtration of the foam product. The method allows increasing the degree of purification from surface-active substances to 89% of wastewater of complex composition while maintaining a high (100%) degree of purification from suspended substances and petroleum products. (L with about 00 O1 a go

Description

1. 1308562

The invention relates to wastewater treatment technology, can be used in the treatment of industrial wastewater of complex composition containing dispersed polymineral impurities, j oil products, unsaturated hydrocarbons, synthetic surface-active substances (SAL) -. detergents and fatty acids.

The purpose of the invention is to increase the degree of cleaning of the surfactants from surface-active substances (SAS) while maintaining a high degree of purification from substances and petroleum products.

Then, the waste water is subjected to electroflops for 10 minutes in a chamber with steel electrodes with a gap between them of 5 mm, a current of 1.5 A, a voltage of 4.3-7.4 V, a current density of 0.55 A / dm, a hydraulic load of 0 , 7 m / m. Flotation foam product is filtered on Buchner funnels at a vacuum of 0.2–0.3 at. The content of synthetic surfactants, suspended solids and petroleum products is determined.

In parallel, wastewater treatment is performed that is of the indicated composition in a known manner, with the introduction of polyacrylate

Purify the industrial rhylamide in an amount of 0.001 g / l. With

Sewage production of semiconductors containing 1300-1500 mg / l of fine suspended solids, 32-35 mg / l of anionic surfactants, 50-60 mg / l of petroleum products, 20-25 mg / l of unsaturated hydrocarbons. Sewage water with stirring for 3-5 minutes introduced a precipitate of press filters, which formed 1x during the treatment of wastewater produced by polymethyl (ethyl) siloxane liquids, calcined with lime and magnesite (1 g / l).

The solid cake cake filter cake is a waste from the production of silicon polymers of the general formula

MeSiO,

R, X

m

where M is Ca, Mg;

R is an organic radical; X - C1 or OH ions; m, n - coefficient.

This waste is formed during the treatment of wastewater from the production of polymethyl- (ethyl) siloxane fluids with calcined limestone and magnesite, followed by filtration of the precipitate and the production of cake.

According to the chemical formula, the name of the waste is dispersed organochlorosilicate of calcium and magnesium or calcium-magnesium organochlorosilicate. Waste properties: it is a hydrophobic, finely dispersed gray substance, dense consistency with a faint odor of aromatic hydrocarbons, humidity of 50-80%. The content of elements in the waste: calcium up to 50%, magnesium up to 10%, silicon up to 10%, chromium up to 1%. Oxidative capacity of organic compounds up to 0.7 mg per 1 g of waste, bulk density up to 460 kg / m,

thermal conductivity coefficient 0,086 kcal / m ..

2

Then, the waste water is subjected to electroflops for 10 minutes in a chamber with steel electrodes with a gap between them of 5 mm, a current of 1.5 A, a voltage of 4.3-7.4 V, a current density of 0.55 A / dm, a hydraulic load of 0 , 7 m / m. Flotation foam product is filtered on Buchner funnels at a vacuum of 0.2–0.3 at. The content of synthetic surfactants, suspended solids and petroleum products is determined.

At the same time, wastewater of this composition is carried out in a known manner, with the introduction of polyaca, the purification of wastewater from oil products and suspended solids by the known and proposed methods is equally effective with a purification rate of 100%. The degree of purification from surfactant is 69.9% by a known method, and 78.1% according to the proposed method. Example 2. Industrial wastewater from the flotation of rare metal ores containing 35 mg / l of anionic synthetic surfactant, 0.4 mg / l of cationic active synthetic surfactant, 5 mg / l of petroleum products and 1500-1800 mg / l of dispersed suspended solids is purified. substances. Wastewater is stirred for 5 minutes with sediment.

press filters formed during the treatment of wastewater from the production of polymethyl (ethyl) siloxane fluids with calcined limestone and magnesite

(0.5-1.5 g / l) or with polyacrylamide (0.001 g / l).

Then the wastewater is subjected to electroflotation for 10 minutes under the conditions described in example 1,

filtering and analyzing.

At the same time, wastewater treatment from suspended solids and oil products known to the lime and the proposed methods is equally effective with

the degree of cleaning 100%

The degree of purification of the surfactant is 74.2% according to a known method and 89.4% as proposed.

As follows from the above examples, the proposed method allows to increase the degree of purification of surfactants of complex composition from surfactants, while maintaining a high degree of purification from oil products and suspended solids.

55

Claims (1)

Invention Formula The method of purification of wastewater from petroleum products, vzveshennyh and superficially313085624 active substances of electro-flotation-degree of purification from suspended substances days in the presence of organic pea and petroleum products, a precipitate is used as an organic agent followed by filtration of the foam reagent distinguishing press filters, formed at the fact that, in order to increase wastewater production, the production of cleaning surface from surface-active-liquid (silo) siloxane fluids substances while retaining high lime and magnesite.