Sand Filter


Sand filter
In the process of water purification, using sand filter stage of filtration is the most important step. This method is mainly used in the water industry throughout the world. The slow sand filters are effectively works on the removal of pathogens and other two helps to works on filtering flocculant chemicals. It also enhances the taste of the filtered water. sand filter extensively filters the suspended matter, floatable as well as sinkable waste. By this way, the 3 types are filters functioning-Rapid(gravity) sand filters, upward flow sand filters and slow sand filters



The sand filter consists of a permeable surface filter in which the particulates are captured on it and the depth filter captures the particulates within a porous body of material. Some of the depth filters consists of fibrous material and granular materials. These are especially used to purify the fluid rather than capturing the solids. slow sand filter is mainly used to filter the organic material, bacteria, viruses and cycts such as giardia and crystoporidium. Rapid sand filters are the speed line filters which works on the top layer of sand which is biologically active.

Upward sand filter is the newest technology used in the water filtration process. The unique feature of this filter is the water is to be filtered fed from the bottom and thus filtered water is obtained at the top. This will reduce cleaning time and decrease the amount of rinse water used. sand filters are mainly used in the sewage treatment at the stage of final polishing. Residual suspended material and bacteria are trapped mainly by this filter. sand filters are the best useful treatment processes in the water purification process.


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