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Nanofiltration is a pressure driven separation process. The filtration process takes place on a selective separation layer formed by an organic semi-permeable membrane. The driving force of the separation process is the pressure difference between the feed and the filtrate (permeate) side at the separation layer of the membrane.
Due to the lower operating pressure and higher flow rates, nano-filtration is inexpensive when compared to reverse osmosis. NF membranes allow partial permeation of monovalent salts such as sodium chloride while rejecting bivalent salts and hardness to a greater extent from aqueous solutions. NF can lower TDS and hardness, reduce color and odor, and remove heavy metal ions from ground water. Nanofiltration is used as an independent system to treat water, or as a pre-treatment to reverse osmosis, thereby, reducing the load on RO.
The basic process of reverse osmosis uses a pump and semi permeable membrane. The pump provides the driving force. The semi permeable membrane passes water in preference to the solute that is dissolved in water; thus the majority of solute is left behind to form a more concentrated stream.
The process of reverse osmosis is not the same as filtration. Filtration is the removal of particulates by size exclusion. Particulates are removed by filtration because they are too large to fit through physical pores in the filter media, where as water molecules can readily fit through the pores.
Reverse osmosis is also a process of separation. The feed water stream is separated into a stream of purified water and a stream of concentrated solutes and particulates. This is as compared to standard filtration where the entire feed stream passes through the membrane pores, leaving the particulates embedded in the filter media.
Brisanzia offers both customized and standardized Package, skid-mounted RO Plant for Commercial , Industrial & Residential Purpose.
Reverse Osmosis (RO) System it is the most economical &efficient method of dissolved solids removal. Reverse Osmosis is a process of physical separation of dissolved solids and minerals present in water. This technology uses the principle of osmosis, wherein the mineral concentration of raw water is reduced by applying high pressure through a semi-permeable membrane.
We provide complete solution (Turnkey Solution) for RO System and their equipments.