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Pressure Sand Filter For Wastewater Treatment
2011-03-30
If
the pump appears to be the problem and you need help with your
investigations, please use the Contact Page to book an appointment for a
PSP engineer to visit. To obtain more information on the PSP Pool
Owners Club, please visit the Members Page. The information on this page
will be added to the appropriate section for members future searches.
Water is pushed through a bed of filter sand and removed through a set
of lateral tubes at the bottom.
Sand dunes are not only made of sand but also of water. You don't have to dig very far to see the moisture in the sand. One of the unique features of sand is that it helps filter water that passes through it. Go out to the sand and have the students dig into the sand and describe what they find. Talk about why they think it is cool and wet. Ask the students where they think the water came from and where they think it goes. Doing Castles in the Sand prior to this activity helps students understand how sand and water work together through a process called capillary action. Raw water flows down wards through the filter bed and as the suspended matter- which has usually been treated by addition of a coagulant like alum- is retained on the sand surface and between the sand grains immediately below the surface. There is steady rise in the loss of head as the filter process continues and the flow reduces once the Pressure sand filter drop across the filter is excessive.
The Pressure sand filter is now taken out of service and cleaning of the filter is effected by flow reversal. To assist in cleaning the bed, the backwash operation is often preceded by air agitation through the under drain system. The process of air scouring agitates the sand with a scrubbing action, which loosens the intercepted particles. The filter is now ready to be put back into service. Picture Low Flow PSF (FRP Vessel) and High flow custom Vessel (MS Vessel) Sand filter - Sand filters are used for water purification. There are three main types; All three methods are used extensively in the water industry throughout the world.
Also the isolating ball valves could be partially turned off or blocked with debris, or even a blocked filter basket in the pump to a blocked pump chamber or impellor inside the pump, or finally a restricted inlet to the multiport fitted to the filter. Further investigation will be needed to find the reasons. If the plantroom is below water level, make sure you can isolate the pool totally including any returns and that the ball valves are installed in the correct direction. If the pump appears to be the problem and you need help with your investigations, please use the Contact Page to book an appointment for a PSP engineer to visit. To obtain more information on the PSP Pool Owners Club, please visit the Members Page. The information on this page will be added to the appropriate section for members future searches.
Sand dunes are not only made of sand but also of water. You don't have to dig very far to see the moisture in the sand. One of the unique features of sand is that it helps filter water that passes through it. Go out to the sand and have the students dig into the sand and describe what they find. Talk about why they think it is cool and wet. Ask the students where they think the water came from and where they think it goes. Doing Castles in the Sand prior to this activity helps students understand how sand and water work together through a process called capillary action. Raw water flows down wards through the filter bed and as the suspended matter- which has usually been treated by addition of a coagulant like alum- is retained on the sand surface and between the sand grains immediately below the surface. There is steady rise in the loss of head as the filter process continues and the flow reduces once the Pressure sand filter drop across the filter is excessive.
The Pressure sand filter is now taken out of service and cleaning of the filter is effected by flow reversal. To assist in cleaning the bed, the backwash operation is often preceded by air agitation through the under drain system. The process of air scouring agitates the sand with a scrubbing action, which loosens the intercepted particles. The filter is now ready to be put back into service. Picture Low Flow PSF (FRP Vessel) and High flow custom Vessel (MS Vessel) Sand filter - Sand filters are used for water purification. There are three main types; All three methods are used extensively in the water industry throughout the world.
Also the isolating ball valves could be partially turned off or blocked with debris, or even a blocked filter basket in the pump to a blocked pump chamber or impellor inside the pump, or finally a restricted inlet to the multiport fitted to the filter. Further investigation will be needed to find the reasons. If the plantroom is below water level, make sure you can isolate the pool totally including any returns and that the ball valves are installed in the correct direction. If the pump appears to be the problem and you need help with your investigations, please use the Contact Page to book an appointment for a PSP engineer to visit. To obtain more information on the PSP Pool Owners Club, please visit the Members Page. The information on this page will be added to the appropriate section for members future searches.
