Filtration Services By Dylan Welsh Projects Pvt. Ltd.

Filtration Services We provide advanced Filtration Services for effective treatment of water. These are known to remove contamination like dirt, turbidity, iron, odour & chlorinated compounds. Following filtration procedures are offered:Pressure Sand Filter: This is among the most conventional filtration methods available and is used extensively.  Filtering media in these filters is fine sand (16/32 mesh) which is normally supported on a bed of graded pebbles. If strainers are used to replace the under bed, a 100mm layer of crushed fine silex is provided so that the fine sand does not log the strainer buttons.Dual Media Filter: Filtration using dual media filters is better than pressure sand filtration method. The pressure sand filters have limited dirt removal capacity as the finest sand forms the topmost layer and as such most of the turbidity is deposited on the top surface resulting in cake formation. In case of dual media filter a 300mm layer of coarse anthracite is provided on top of 300mm of fine sand. There are two benefits of providing the coarse anthracite layer:The coarse anthracite layer does pre-filtration and removes turbidity before water comes in contact with the fine sand.The dirt removing capacity of the Dual Media filter is about five times higher than that of pressure sand filter.The anthracite being coarse provides less pressure drop.Activated carbon filter: It is widely known for its impurity absorption qualities and is actively employed in water treatment. Some of the salient benefits of this filtration process are:De-chlorinationRemoval of organic impuritiesRemoval of odourThe quality of purified water depends on following parameters:Flow rate of waterPore size of activated carbonDegree of activationParticle sizeBed depthIron Removal Filters (IRF): We provide filtration using iron filters which filters the water in such a manner so that it is completely free and safe from all the dissolved iron contents which can cause harmful effect to the body. Dissolved iron in the water precipitates as ferric hydroxide when the carbon dioxide from the raw water is released and water comes in contact with oxygen from the air. Following steps are taken to remove iron from water:AerationpH CorrectionContacting with catalyst like manganese dioxideFiltrationUsually iron is found in bore well water having typically low pH and substantial quantity of dissolved carbon dioxide. When the water is aerated through spraying or aeration towers (like degasser), the carbon dioxide from the water is released. This increases the pH and also saturates the water with oxygen which is necessary for oxidising the iron to insoluble ferric from the soluble ferrous from. The pH of the water is increased by dosing alkali like Sodium Hydroxide. Alkali helps in formation of ferrous hydroxide which precipitates out. The water is then contacted with a layer of manganese dioxide which acts as catalyst in conversion of from ferrous to ferric from.Micron Filtration: We offer micron filtration services used to remove micron size particles from water. Features:Spun type, Wound, PlatedMicron: 0.2 to 200Sizes: 10" to 40"Bag Filters: Micron: 1.0 to 200Housing: PP/SS/Big blue