Choosing the best treatment of iron removal depend not only on the form of iron present, but also on how much of the contaminant is present, the hardness of the water, temperature variations, and the water’s ph (acidity or alkalinity). 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.

Therefore to facilitate iron removal normally following steps are taken.
1. Aeration
2. ph correction
3. Contacting with catalyst like manganese dioxide
4. Filtration

The plant consist of six 91 cm ( 36") diameters filters, from which the activated carbon was removed and replaced with Media G2. Operation is simple; water passes downward through the filters at a rate of 11-13 m3/h (50-60 gpm), providing a 10-15 minute contact time for arsenic to react with, and bind to, the surface of the media particles. To optimize performance, pH of the inlet water is decreased to 6.7-6.9 by an acid-dosing metering pump linked to a pH sensor/controller. Maintenance is minimal.

Nitrates and Nitrites are compounds are commonly used in lawn treatments and fertilizers. Nitrites can cause problems in young children and farm animals, as they bind very strongly to hemoglobin, and can affect the blood’s ability to carry and release oxygen. Nitrates are injected through water or food which are further converted into nitrites by the bacteria present in infant digestive track.

Water found to contain excessive nitrates can be treated by a variety of methods. Point of use systems reduce the levels by either Reverse Osmosis filtration, Distillation, or a disposable mixed-bed deionizer- and can remove the nitrates (and other contaminants) for water specially to be used for drinking and cooking. Another option is a system very much like a water softening system, using a strong base anionic exchange resin bed rather than the cationic exchange resin bed commonly used for water softening.

These filters have high capacity of dirt removal as the finest sand forms. In these filters a thick layer of coarse anthracite is provided on the sand layer. This filter is about five times more effective in dirt removal capacity than the Pressure Filters.

Activated Carbon Filters are widely used filters for absorption of impurities. In Water Treatment Systems the Activated Carbon is employed for
»De-chlorination.
»Removal of Organics
»Removal of Odor
»Removal of Odor

Silica present in water varies form less than 1 ppm to over 100 ppm. It forms a very hard scale in boilers and form deposits on turbine blades. In modern high pressure boilers, it is reduced to as low as 10 ppb level. Silica is present in water in colloidal form and ionic form. Colloidal silica can be removed by dosing polyelectrodes in the water before clarification. Only the ionic silica is removed in anion exchanger/mixed bed exchanger.

These are the most conventional filters and are in extensive use. The filtering media in these filters is fine sand. The sand is normally supported on a bed of grated pebbles. The pressure sand filters have dirt removal capacity as the finest sand forms the top most layer and as such most of the turbidity is deposited on the top surface resulting in cake formation.

A water softener is a device or a substance, that remove or renders inactive and isolate minerals, such as Calcium, Magnesium. Water containing dissolved calcium and magnesium in amount greater than 120mg./1 is considered hard, this water destroys the detergent property of soaps. On heating & cooling, it forms scales which corrodos.

»Extends the life of plumbing systems and water – using appliances through the reduction of clogging from scale within the pipes.
»Reduces soapy residue on cloths, film on tub and shower tiles and scratching on bathroom fixtures.
»Heating efficiencies on hot water tanks using softened water can increase up to 29%.
»Makes hair shiner and skin clearer and healthier looking by reducing soap cum build up.
»Decreases cooking gas consumption by 30%.

SOGTENING OF HARD WATER – connect the raw water source to the inlet valve to Aquapura.

Open inlet and outlet, close drain and brine valves, now open the tap and get soft water instantly eventually the capacity will get exhausted and regeneration we will required


Re-generation: Prepare salt solution by dissolving the 13% common salt of the resin quantity into 5 – 10 ltrs or half bucket of water. Close the inlet, outlet valves, open the drain, injector brine valves pass the salt solution through it , after total solution is passed from brine valve, close the drain valve and open inlet valve and pass water fro just few minutes to rinse the remaining salt solution from AQUA PURA then once again open inlet & outlet valves for soft water.

Testing : Wash your hands using soft water & hard water alternately & observe the difference yourself. Soft water provides more lather than hard water. The Aqua pura provides soft water upto the limit of 80 – 120 ppm. Which has been approved by W.H.O.