# US 8,465,652 B2 · Method for disinfecting sewage sludge

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- Number: US 8,465,652 B2
- Document ID: US8465652B2
- Status: Granted
- Kind: B2
- Application number: 13/517,058
- Filed: 2010-12-16
- Published: 2012-10-04
- Granted: 2013-06-18
- Earliest claimed: 2009-12-25
- Assignees: Twin Trading Company
- Applicants: Yakov Kuzmich Abramov; Vladimir Mihailovich Veselov; Viktor Mihailovich Zalevsky; Vitaly Grigorevich Tamurka; Nikolay Dmitrievich Argunov; Ljubov′ Viktorovna Motovilova; Nikolay Vladimirovich Dvoryaninov; Lidija Petrovna Bogdanova
- Inventors: Yakov Kuzmich Abramov; Vladimir Mihailovich Veselov; Viktor Mihailovich Zalevsky; Vitaly Grigorevich Tamurka; Nikolay Dmitrievich Argunov; Ljubov′ Viktorovna Motovilova; Nikolay Vladimirovich Dvoryaninov; Lidija Petrovna Bogdanova
- Web page: https://patentgrep.com/patent/US8465652B2

## CPC

- C02F 11/185: {by pasteurisation}
- C02F 2301/063: Underpressure, vacuum
- C02F 2303/04: Disinfection
- C02F: TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE (separation in general B01D; special arrangements on waterborne vessels of installations for treating water, waste water or sewage, e.g. for producing fresh water, B63J; adding materials to water to prevent corrosion C23F; treating radioactively-contaminated liquids G21F9/04; regeneration of reactants for recirculation into processes, see the relevant places for the processes)

## Abstract

The invention relates to a technique of disinfecting household and industrial waste water used as the basis of organo-mineral fertilizers. The present method of disinfection is carried out by means of quick vacuum-pulse actions on sewage sludge using a receiver and quick response valves, with a pulse duration of less than 1.0 seconds at a pressure of not more than 20 mmHg to achieve the required degree of disinfection. Technical result of the use of the invention is to accelerate and simplify the process of disinfection method.

## Claims

### Claim 1

A method of disinfection of sewage sludge, the method comprising:
creating a vacuum to vacuum sewage sludge;
the vacuuming of the sewage sludge is produced by high-speed vacuum—impulse action;
wherein the pulse has a duration of not more than 1 second and a residual pressure is of not more than 20 mm Hg.

### Claim 2 (depends on 1)

The method of disinfection of sewage sludge of claim 1 wherein a number of the high-speed vacuum—impulse is found till required degree of disinfection of the sewage sludge.

### Claim 3 (depends on 1)

The method of disinfection of a sewage sludge of claim 1 wherein a number of the high-speed vacuum—impulse is found till destruction of microorganisms.