Filtration process in water treatment:- In flirtation process the water is passed through a filter bed which consists of porous martial sand,gravel,charcoal . When water passes through the bed , the suspended solids matters are collected in the bed clear filter water is collected from the bottom of bed of …
Many water treatment plants use a combination of coagulation, sedimentation, filtration and disinfection to provide clean, safe drinking water to the public. Worldwide, a combination of coagulation, sedimentation and filtration is the most widely applied water treatment technology, and has been used since the early 20th century.
When water enters a treatment plant, the first stage in the process is coagulation where chemicals are added to the water supply to enable microparticles and small solids to stick together. Polyelectrolyte, ferrous sulfate, and aluminum sulfate are examples of chemicals used in the water treatment plant process to aid coagulation.
media than sand filters. Direct filtration plants have a lower capitol cost. However, the process cannot handle large variations in water turbidity. Water either from the source or, more commonly, from pre-treatment processes is applied to the top of the filter; it then flows downward. The water level above the filter bed is usually kept
Membrane filtration Process in Water Treatment Plant. The membrane filtration processes in water treatment process are reverse osmosis, ultrafiltration, microfiltration and nanofiltration. These processes have traditionally been applied to the production of water for industrial or pharmaceutical appli ions but are now being applied to the ...
The use of a single-medium coarse-sand filter is practiced in Europe. For example, sand with a size range of 0.9-1.5 mm and about 1.0 m depth has been used in surface-water treatment plants. These filters are scoured with concurrent air and water at nonfluidizing velocity followed by a brief wash at high velocity with water alone.
Filters, as commonly understood in water treatment generally consist of a medium within which it is intended most of the particles in the water will be captured. Such filters might be manufactured as disposable cartridge filters, which can be suitable for domestic i.e. point-of-use treatment and small-scale industrial appli ions.
A minimum of four filters is desirable, although two to three filters may be used for small plants. Water treatment filter bed sizes vary from 25 to 100 m2 with lengths in the range of 4 to12 m and widths in the range of2.5 to 8 m and length to breadth ratio of1.25 to 1.33.