Method for purification and disinfection of water

• US 6,802,981 B2
• Filed: 11/05/2002
• Issued: 10/12/2004
• Est. Priority Date: 11/05/2002
• Status: Expired due to Fees

• Current Assignee: AquaPure Technologies Ltd.
• Original Assignee: AquaPure Technologies Ltd.
• Inventors: Ryazanov, Nikolay Danilovich, Ryazanova, Natalia Grigorievna
• Primary Examiner(s): LAWRENCE JR, FRANK M
• Application Number:
  US10/288,087
• Publication Number:
  US 20040084382A1
• Time in Patent Office: 707 Days
• Field of Search: 210/702, 210/723, 210/726, 210/748, 210/767, 210/760, 210/764, 204/164, 204/176, 205/701, 205/756
• US Class Current: 210/726
• CPC Class Codes: C01B 13/11 by electric discharge
• CPC Class Codes: C01B 13/115 characterised by the electrical circuits producing the electrical discharge
• CPC Class Codes: C01B 2201/22 Constructional details of the electrodes
• CPC Class Codes: C01B 2201/82 Treatment with ultraviolet light
• CPC Class Codes: C02F 1/001 Processes for the treatment of water whereby the filtration technique is of importance C02F1/44 takes precedence; construction of filters in general B01D24/00 - B01D41/00
• CPC Class Codes: C02F 1/008 Control or steering systems not provided for elsewhere in subclass C02F
• CPC Class Codes: C02F 1/28 by sorption using ion-exchange C02F1/42; sorbent compositions B01J
• CPC Class Codes: C02F 1/283 using coal, charred products, or inorganic mixtures containing them
• CPC Class Codes: C02F 1/42 by ion-exchange ion-exchange in general B01J
• CPC Class Codes: C02F 1/46 by electrochemical methods
• CPC Class Codes: C02F 1/4608 using electrical discharges
• CPC Class Codes: C02F 1/52 by flocculation or precipitation of suspended impurities C02F1/463 takes precedence
• CPC Class Codes: C02F 1/5236 using inorganic agents
• CPC Class Codes: C02F 1/74 with air aeration of stretches of water C02F7/00
• CPC Class Codes: C02F 1/78 with ozone C02F1/4672 takes precedence
• CPC Class Codes: C02F 2103/42 from bathing facilities, e.g. swimming pools
• CPC Class Codes: C02F 2209/03 Pressure
• CPC Class Codes: C02F 2209/40 Liquid flow rate
• CPC Class Codes: C02F 2303/04 Disinfection
• CPC Class Codes: C02F 9/00 Multistage treatment of water, waste water or sewage

Abstract

A novel system and method for purification and disinfection of water containing contaminates is provided. The system includes an aeration column, a first intermediate tank, a first mechanical filter, an electric discharge device, a second intermediate tank, a second mechanical filter and a sorption filter. The water is firstly aerated by continuous mixing the water with air and ozone-air mixture. The water obtained after the aeration is treated with coagulant materials in a medium of the ozone-air mixture. Further, the water is filtered from coagulated particles. Thereafter, the water is treated by electric discharges in an air medium. The water is then treated again with coagulant materials. Finally, the water is filtered from remaining contaminates.

Claims

1. A method for purification and disinfection of water containing contaminates, comprising the steps of:

(a) aerating the water by continuous mixing the water with air and ozone-air mixture;

(b) treating the water obtained after step (a) with coagulant materials;

(c) filtering the water after obtained step (b) from coagulated particles;

(d) treating the water by electric discharges in an air medium;

(e) treating the water obtained after step (d) with coagulant materials; and

(f) filtering the water after obtained step (e) from remaining contaminates.

2. The method of claim 1 wherein treating the water with coagulant materials is carried out in a medium of the ozone-air mixture.

3. The method of claim 1 wherein treating the water by electric discharges includes providing high-voltage pulses sufficient to generate a crown electric discharge for producing at least one product from the following:

ultraviolet radiation, ozone, atomic oxygen, excited oxygen molecules, electrons and ions above the water surface, along with OH⁻

radicals, peroxides and protoxides in the water volume.

4. The method of claim 3 wherein the amplitude of said high voltage pulses is higher than 10 kV.

5. The method of claim 3 wherein the length of said high voltage pulses is shorter than 0.5 microseconds.

6. The method of claim 3 wherein the pulse repetition frequency is higher than 500 Hz.

7. The method of claim 3 wherein the pulse rise time is shorter than 50 nanoseconds.

8. The method of claim 1 wherein the filtering of the water includes transferring the water through a mechanical filter.

9. The method of claim 8 wherein the filtering of the water further includes transferring the water through a sorption filter.

10. The method of claim 1 wherein said coagulant materials are selected from metals and metal oxides which can form hydrates under the action of oxygen, ozone and water.

11. The method of claim 1 wherein said coagulant materials are selected from the following materials:

iron and iron oxides.