Title:
A WATER PURIFICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2013/034396
Kind Code:
A9
Abstract:
The invention relates to a device and method for purification of water using Reverse Osmosis (RO) membrane. There is a need to maintain uniform TDS level in the output water that has been purified using a reverse osmosis process where there is significant variation in the TDS levels of the input water. This is important considering the fact that there may be significant variation in the TDS levels from various sources of water. It is thus an object of the present invention to design a filter cartridge to ensure that the TDS level in the water purified by a reverse osmosis membrane is maintained within a range of 25 to 200 ppm (parts per million) irrespective of the TDS levels in the input water. It is another object of the present invention to provide a filter cartridge that provides sustained release of TDS over a typical lifetime of an RO membrane which is generally about 8,000 to 10,000 litres. We have determined that a certain combination of calcium carbonate and magnesium carbonate provides controlled increase in TDS irrespective of the TDS levels in the input water, thereby making the water palatable.
Inventors:
DAVE PARTHIV RIPUDAMAN (IN)
NALAWADE SHRIKANT POPAT (IN)
SAKSENA SKAND (IN)
NALAWADE SHRIKANT POPAT (IN)
SAKSENA SKAND (IN)
Application Number:
PCT/EP2012/065791
Publication Date:
August 29, 2013
Filing Date:
August 13, 2012
Export Citation:
Assignee:
UNILEVER NV (NL)
UNILEVER PLC (GB)
DAVE PARTHIV RIPUDAMAN (IN)
NALAWADE SHRIKANT POPAT (IN)
SAKSENA SKAND (IN)
UNILEVER PLC (GB)
DAVE PARTHIV RIPUDAMAN (IN)
NALAWADE SHRIKANT POPAT (IN)
SAKSENA SKAND (IN)
International Classes:
C02F1/00; B01D61/02; B01D61/08; C02F1/44
Attorney, Agent or Firm:
ROSEN JACOBSON, Frans L.M. (Olivier van Noortlaan 120, AT Vlaardingen, NL)
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