Panda Water Tech Pvt. Ltd.™

ISO 9001 CERTIFIED

Ultra Filtration System UF remove 99% of colloidal silica, Iron and Aluminum. For medium pressure power plant, the UF reduce silicate deposits on turbine blades which enhanced turbine efficiency and longer service life. For high pressure power plant, the UF will help to decrease sharply the boiler blow down. RO membrane are sensitive to colloidal in general, particulate and organic matter fouling which result in extensive cleaning cycles, higher operating pressure and frequent replacement of the RO elements. Pretreatment with Ultra-filtration reduces the SDI below 1 or 2 and provide a low fouling feed water to RO. The Ultra filtration system can be easily backwashed with aggressive chemical such as chlorine (up to 200 ppm). Ultra filtration allows for in-place recycle of water for closed loop recovery systems. Depending on plant requirements, water from plant operations may be biologically treated first for the COD/BOD reduction, followed by Ultra filtration and other Ions removal process such as RO or Ion exchanger. A microporous membrane filter removes particles according to pore size. By contrast, an ultrafiltration (UF) membrane functions as a molecular sieve. It separates dissolved molecules on the basis of size by passing a solution through an infinitesimally fine filter. The ultrafilter is a tough, thin, selectively permeable membrane that retains most macromolecules above a certain size including colloids, microorganisms and pyrogens. Smaller molecules, such as solvents and ionized contaminants, are allowed to pass into the filtrate. Thus, UF provides a retained fraction (retentate) that is rich in large molecules and a filtrate that contains few, if any, of these molecules. Ultrafilters are available in several selective ranges. In all cases, the membranes will retain most, but not necessarily all, molecules above their rated size. Advantages : - Effectively removes most particles, pyrogens, microorganisms, and colloids above their rated size. - Produces highest quality water for least amount of energy. - Regenerable Disadvantages : - Will not remove dissolved inorganics. Nanofiltration - Liquid Membrane Technology State of the art water purification and most leading edge technology in water treatment is now available for practical use in your business or manufacturing facility. Nanofiltration water treatment is a liquid separation membrane technology. Where a lower salt rejection is acceptable, Nanofiltration systems offer cost-effective alternative to commercial reverse osmosis units, as Nanofiltration systems can be operated at low pressures. The level of dissolved solids to be removed is less than what is typically encountered in brackish water or seawater. As such, Nanofiltration is especially well-suited for treatment of municipal water, well water, or water from surface sources like rivers and lakes. Nanofiltration systems are capable of removing water hardness (calcium and magnesium) is also capable of removing bacteria, viruses and color, as well as organic compounds. Nanofiltration is also used to remove pesticides and other organic contaminants from surface and groundwater. Sometimes referred to as membrane softening or membrane water softeners, Nanofiltration is an alternative to salt based water softening. Advantage: lower investment costs and lower energy costs! Compared to conventional softening, operation costs are considerably reduced as expensive regenerations with large salt amounts becoming obsolete. Less waste water! Nano filtration can achieve up to a 75% recovery whereas reverse osmosis has a 50% recovery. Furthermore, the pH of the water after it has been filtered through the Nano Filtration system is not as aggressive as water filtered through an RO unit. Thus, no corrosion problems. See commercial reverse osmosis and Nanofiltration comparison chart below. Nanofiltration systems are used for water filtration, dairy and cattle farming, business, water softening, food, pharmaceutical, municipal, lake, river, and well water applications. Nanofiltration Benefits : - Lower operating costs - Lower energy costs - Lower discharge, Less waste water than RO - reduces salt (TDS) content of slightly brackish water - reduces pesticides, VOC's (organic chemicals) - reduces heavy metals - reduces nitrates and sulfates - reduces color, tannins, and turbidity - softens hard water - Chemical-Free - i.e. does not use salts or chemicals - pH of the water after the Nanofilter is typically non aggressive. Comparison Chart Reverse Osmosis Nano Filtration Filtration level (micron) 0.0001 to 0.001 0.0008 to 0.01      Size of viruses (micron) 0.005 to 0.01 0.005 to 0.01 Size of bacteria (micron) 0.2 to 10 0.2 to 10 Filtration of viruses and bacteria YES YES Typical recovery (%) 50% 75% Typical TDS reduction (%) 99% 70% Typical points of pH reduction 2+ Less than 1  Need for pH correction of permeate Yes, 50% of time No, 90% of time  Residual water hardness (grains) 0 1 Maximum raw TDS without special design considerations (PPM) 2,000 1,500  Average high pressure (PSI) 150 90