SU1761683A1 - Method for treatment and decontamination of industrial sewage - Google Patents

Abstract

Use: cleaning and disinfection of industrial wastewater. The essence of the invention: water treatment is carried out in three successive stages: simultaneous treatment of water in an electric and magnetic field with a strength of 15-20 V / cm and 5-TA / m, respectively, ozonation of zones with a gas at a volume ratio of the liquid and gas phases ( 15-20): 1 with simultaneous electro-spark exposure frequency of 1-5 Hz, vibroelectrochemical processing at a frequency of 1-5 Hz with synchronous supply of ozone-containing gas. The method allows to increase both the degree of purification from suspended particles and the degree of disinfection. 2 tab.

Description

The invention relates to methods for treating and disinfecting water by pulsed electrohydrodynamic processes and can be used in water supply and sewage systems.

The aim of the invention is to increase the degree of purification and disinfection of water.

Below is a technological scheme of water purification in this method.

Water containing finely dispersed suspensions, bacteria, metal ions is fed through a conduit for purification and exposed to a rotating electromagnetic field with a strength of, respectively, 0.15-0.2 V / m and 5-7 A / m. At the same time, ions of salts and metals form crystalline nuclei, which serve as crystallization centers, i.e., in one solution, due to the influence of an electromagnetic field on it, fine crystalline seed structures are formed, they adsorb calcium, magnesium, iron, and bacteria ions on their surface. this is deformed.

The pulsed stream of ozonated air in the water-air ratio (15-20): 1 is supplied to the water pulp prepared in this way and it is additionally subjected synchronously with the supply of ozonated air to an electro-hydrospheric effect of a frequency of 1-5 Hz, which creates a large pressure drop at the moment of sparking in the liquid . The water hammer thus formed destroys the hydration shells of the bacterial flora and bound ions and stimulates the coagulation of suspensions in the aqueous stream.

During the explosion, ozonized air, due to a sharp pressure drop, is strongly dissolved in the liquid and thus contributes to a better disinfection.

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current flow, destruction of hydrated shells of metal ions, oxide ions and coagulation.

Despite the powerful bactericidal effect obtained by electro-gas-spark treatment of the water flow, with a large mass transfer during the pressure drop, individual Coli-like bacteria may penetrate into the production line. To eliminate this drawback, water is passed between electrically charged plates, where it is subjected to vibroelectrochemical processing at a frequency of 1-5 Hz.

In order to reliably release the electrode plates from fouling by suspended particles during the period of polarity change, electrodes are simultaneously synchronously pulsed with the supply of ozonated air, which excites the electrode plates and increases the bactericidal effect.

The water flow treated in this way enters the settling tank, where suspended particles (enlarged during the water treatment) in the water are precipitated.

In tab. 1 shows the results of a particular implementation of the method.

In tab. 2 compares the results of tests of the known and the proposed methods, from which it follows that the proposed method improves both the degree of purification and disinfection of wastewaters.

FORUMAWLAH AND ISLANDS

The method of purification and disinfection of industrial and waste water, including the treatment of them with ozone-containing gas at a volume ratio of liquid and gas

phases (15-20): 1 while applying a non-uniform electric field with a strength of 15-20 V / cm, characterized in that, in order to increase the degree of cleaning and disinfection, water treatment is carried out in three stages in the following sequence: simultaneous treatment in an electric and magnetic field with a strength of 5-7 A / m, ozonization with an electro-hydrospark effect with a frequency of 1-5 Hz, and vibroelectrochemical treatment at the same frequency with a synchronous supply of ozone-containing gas.

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l-jcrofliiKue: flow rate of I m / s, productivity 10,000, ratio of rode-yoedul (15-20), suspension amount 1000 ng / g, concentration 100,000 units per liter (spring flood of the Obi river), (pulse duration bit 5 µs)

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Claims (1)

Claim A method of cleaning and disinfecting industrial and waste water, including treating them with an ozone-containing gas at a volume ratio of liquid to gas phase (15-20): 1 while applying an inhomogeneous electric field with an intensity of 15-20 V / cm, characterized in that, for the purpose increase the degree of cleaning and disinfection, water treatment is carried out in three stages in the following sequence: simultaneous treatment in an electric and magnetic field with a strength of 5-7 A / m, ozonation with electro-spark exposure with a frequency of 1-5 Hz and vib electrochemical treatment at the same frequency with a synchronous supply of ozone-containing gas. Table! Constants: flow rate I m / s, productivity 1 0000 m "/ day, water-air-air ratio (15-20);!, Amount of suspensions 1000 mg / l, concentration bct;" and I 00000 units per liter (spring flood p . Obi), (discharge pulse duration 5 μs) Electric hours: N field, A / m Electrohydrospark. impact Vibrolectrochemical processing results experience Suspension mg / L Concentration of bacteria units / colmx frequency, ...... j stored energy, j stacks, Hz fullness E, 3 / cm 1 2 1 900 1 if fifty 190 1 eoo 1 4 fifty 1 in 3 1 300 1 if fifty 160 4 1 zoo ΐ 4 fifty 100 5 1 900 1 If fifty 70 6 1 900 1 if fifty zo 7 1 eoo t A fifty 10 IN 1 900 1 4 fifty 8 10 1 eoo 1 4 fifty 5 12 J 900 1 4 fifty 3 5 2 900 2 if fifty fifty 5 5 eoo 3 if fifty thirty 5 4 300 4 if 45 20 5 5 900 5 if 40 fifteen 6 5 9D0 5 38 12 7 > 900 5 4 36 10 10 5 900 5 if thirty 8 5 5 900 5 10 10 0 6 1 900 1 10 fifteen 20 6 2 900 2 10 10 12 6 3 900 3 1 D 5 7 6 t. 90A if 10 3 3 7 1 900 1 10 fifteen 18 7 1 900 l fifteen 10 fifteen 7 1 900 1 20 6 12 7 2 900 g. 20 . 5 6 7 3 900 3 20 4 5 7 90C if 20 3 3 7 5 900 5 20 2 2 5 1 1000 I fifteen 12 18 5 1 1300 1 fifteen 10 10 6 I 1,300 1 fifteen 9 5 7 1 1500 1 fifteen 8 3 7 2 1 ltd 2 fifteen 7 1 7 3 1,000 3 fifteen 7 from 6 2 1 ltd 2 fifteen 7 1 6 3. 1000 3 fifteen 5 1 0 4 1000 k fifteen 0 ύ 3 1500 3 fifteen 3 0 6 3 1500 3 20 2 0 cm Table with ABOUT e \ i ABOUT With ABOUT With about about 00 04 04 04 with about about. Ci Ci S <0 1_ ο About Q. Φ to" ο U ω Ο ffi φ ο Q φ * Ο ο ο C S