![]() ![]() ![]() The regeneration involves, backwashing & rinsing of Carbon Bed. When pressure drop across the Carbon Bed increased beyond the specified limit of (0.8 kg/cm?) or quality of filter water deteriorates, whichever is earlier the unit is isolated for regeneration. During service cycle water is passed in down ward direction through Carbon Bed, which removes Chlorine & Odour from water. A granular activated carbon is charged on the supporting media of Coarse & Fine Silex. The unit is fitted with SS frontal pipe work & MPV externally. Internally it is fitted with strainer on bottom collecting system. ACF Unit is a FRP vertical pressure vessel. This Carbon granules having larger surface area and specific property to absorb organics. Activated Carbon can remove Chlorine, Odour, &Colour while passing the water through carbon bed along with Odour&colour. Chlorine being a strong oxidizing agent, it damages R.O. If raw water is chlorinated for die-infection, it is necessary to remove the free Chlorine feeding to R.O System. Natural water may contain Colour, Odour, Chlorine & Organics in different proportion, which is undesirable for potable application, and hence, it is necessary to remove the same from water. A HDPE chemical preparation tank with an electronics diaphragm type dosing pump is provided for this. The Chlorinated water may oxidize the membrane and to avoid the same precautionary we have provided Sodium MetaBiSulphite dosing system Dosage rate is 4-5 mg/liter. The effluent water is drained for about 5 minutes time to ensure all unclear water is drained down. Backwashing is continued for about 10- 15 minutes or till the effluent coming out is clear For Rinsing of Sand Bed: Service water is passed in down ward direction to settle down the sand bed. Due to this, entrapped suspended matters get free and come out along with effluent water. For backwashing service water is passed in reverse direction of service cycle to loosen the filtering media bed. Regeneration involves backwash & rinsing of Sand Bed as below. When pressure drop across the sand bed increases beyond the specified limit (0.5 kg/cm?) or quality of filtered water determinates, whichever is earlier. At this stage filter bed need to be backwashed. Over a period of time, sand bed gets chocked due to suspended matters resulting higher pressure drop and lesser floe. During service cycle water is passed in down ward direction through sand bed, thus entrapping suspended matter & turbid particles. This unit is fitted with SS frontal pipe work and Multiport Valve externally. ![]() Uniform grades silica quartz sand is charged on the supporting media of pebbles and gravels. Internally, it is fitted with bottom collecting system. PSF Unit is a SS vertical Pressure Vessel. Pressure Sand Filter Unit is provided for removal of suspended matters & turbidity from raw water. Raw Water is first filtered by filtration unit in series prior feeding R.O.Plant. Necessary Suction / discharge pipe work in s.s construction with isolation valves are also provided up to PSF Unit. The tank is fitted with PVC pipe work & isolation valves and suitable type of level indicator.Ī Horizontal Centrifugal type of pump in Stainless Steel construction has been provided for supplying Raw water to Pressure Sand Filter Unit. of Raw water is required in for storage of chlorinated water having appropriate capacity. Dosage rate is adjusted as per the actual requirement, which may very on case to case basis Required suction / discharge pipe work in pvc construction is provided with isolation valves. of HDPE hypo chlorite solution preparation tank along with one nos. This reacts with water to form a hypo chlorite acids which acts as disinfecting agent.įor this purpose one no. About 3-4 ppm of sodium hypo chlorite solution is dosed in raw water storage tank. We have offered a Hypo chlorite dosing system for this purpose. Even water may contain ferrous which can be oxidized to ferric oxide which is settling down in storage tank. ![]() Raw water may contain living micro-organisms and organics which are objecting a Membrane as it may cause fouling to deteriorate the performance. ![]()
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