# US 2014/0144845 A1 · Method for water treatment regeneration stage

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- Number: US 2014/0144845 A1
- Document ID: US20140144845A1
- Status: Published application
- Kind: A1
- Application number: 14/148,316
- Filed: 2014-01-06
- Published: 2014-05-29
- Earliest claimed: 2010-02-01
- Assignees: Pentair Residential Filtration, LLC
- Applicants: Pentair Residential Filtration, LLC
- Inventors: Andrew Tischendorf; Michael M. Lindfors; Kyle Paull
- Web page: https://patentgrep.com/patent/US20140144845A1

## CPC

- C02F 1/74: with air (aeration of stretches of water C02F7/00)
- 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)}
- C02F 1/004: {using large scale industrial sized filters}
- C02F 5/00: Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents (softening using ion-exchange C02F1/42)
- C02F 1/72: by oxidation {(C02F1/4672 takes precedence)}
- C02F 2101/101: {Sulfur compounds}
- C02F 2101/203: {Iron or iron compound}
- C02F 2101/206: {Manganese or manganese compounds}
- C02F 2303/14: Maintenance of water treatment installations
- C02F 2303/16: Regeneration of sorbents, filters
- Y10T 137/0947: With servo connection to valve
- Y10T 137/86493: Multi-way valve unit
- 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)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Embodiments of the invention provide a method and system for providing a regeneration stage in a water treatment system. The method can include entering a first air bleed state to allow pressurized, deoxygenated air to exit the water treatment system, entering a second air bleed state to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second air pressure outside the water treatment system, entering a backwash state to expel remaining deoxygenated air and particulates from inside the water treatment system, and entering an air draw state to allow oxygenated air to enter the water treatment system.

## Claims

### Claim 1

A method of providing a regeneration stage in a water treatment system, the method comprising:
pressurizing a tank by the addition of untreated water;
entering a first air bleed state for a first time period to allow pressurized, deoxygenated air to exit the water treatment system;
entering a second air bleed state for a second time period to equalize a first air pressure of remaining deoxygenated air inside the water treatment system with a second atmospheric air pressure outside the water treatment system; and
entering a backwash state for a third time period to expel the remaining deoxygenated air and particulates from inside the water treatment system.

### Claim 2 (depends on 1)

The method of claim 1, and further comprising providing a valve assembly and a powerhead to operate the water treatment system in the first air bleed state, the second air bleed state, the backwash state, and the air draw state.

### Claim 3 (depends on 1)

The method of claim 1, and further comprising entering an air draw state for a fourth time period to allow air to enter the water treatment system.

### Claim 4 (depends on 1)

The method of claim 1, wherein the second time period is about 1 minute.

### Claim 5 (depends on 3)

The method of claim 3, wherein each one of the first time period, the second time period, the third time period, and the fourth time period is adjustable.

### Claim 6 (depends on 1)

The method of claim 1, and further comprising removing at least one of iron, sulfide, and manganese using the water treatment system.