Patent ID: 9745207
Date: 2017-08-29
CPC Classifications: C02F

Claim:
1. A treated water purification system comprising a water flow loop, said loop being closed onto a tank of treated water to purify, and said loop successively comprising, in the direction of flow of the water downstream of the tank, at least one pump, at least one first filter comprising a first membrane having a feed side and a retentate side and producing a permeate, at least one second filter comprising a second membrane through which said permeate from said first membrane is directed and passes and at least one point of use connected to said permeate from said second membrane, said second membrane having a retentate side, the system further comprising at least one diversionary pipe connected to said retentate side of said first membrane and linking the first filter to the tank, and a loop return pipe connected to said retentate side of said second membrane and linking the second filter to the tank, wherein the diversionary pipe is configured such that below 30% of the flow of the water capable of flowing in the flow loop passes via said diversionary pipe, wherein residual gas that has accumulated in said first and second filters is returned to the atmosphere at the tank, wherein all retentate from said retentate side of said first membrane is returned to said tank via said diversionary pipe, and all retentate from said retentate side of said second membrane is returned to said tank via said loop return pipe, and wherein at least one UV sterilizer is mounted in said tank or on said flow loop.