SINGLE CORE MULTIPLE FOLD HYBRID MEMBRANE FOR FLUID TREATMENT

ABSTRACT OF THE INVENTION The present invention relates to a composite filter for water purification and filtration. In particular, the present invention comprises a Single Core Multiple fold Hybrid Membrane for purification of water. The said single core multiple fold hybrid membrane comprises a combination of membranes such as Reverse osmosis membrane, Nanofiltration membrane, ultra filtration membrane, micro filtrations and combinations thereof. In particular, the said hybrid Membrane of the present invention is a composite membrane for purification and filtration of water comprising a combination of (a) Reverse osmosis Membrane and (b) nanofiltration membrane and/or (c) Ultra filtration membrane and (d) a feed channel spacer. The said Single core Multiple fold Hybrid Membrane is formed by a Spiral wound module wherein, the basic unit is a sandwich of flat membrane sheets called a 'leaf wound around a central perforated tube. The said leaf consists of said combination of membrane sheets placed back to back or multiple independent folds and separated by the said feed channel spacer. In a preferred embodiment, there are multiple layers may be more than one, more than two or more than three and combinations of membranes thereof. The membrane combinations are customized based on the Total Dissolved Solids or Salts (TDS) of the Input water. The TDS of the water is the combined output TDS of the filtered water from the combination of the membranes used for purification. Furthermore, said membrane advantageously reduces the rejection of water as waste water, as it comprises a combination of membranes such as Reverse Osmosis and nanofiltration to achieve the highest purity of water filtration.