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Pretreatment Water Filter process for Bottled Water


Prior to the removal of chlorine or any of its by products initially the feed water would have to be passed though a pre filtration process, in this case the use of a GAC Granular Activated Carbon Filter would be the an ideal choice. A GAC filter would have the ability to be able to remove contaminants such as chlorine and chloramine as well as other chemicals.

Water Conditioning

The water conditioning process consists of 2 columns of resin that will soften water by means of the removal of it’s hardness. A column of cation resin soaks in calcium as well as magnesium ions and then exchanges them with sodium chloride. The end result in this process is soft water. Considering that the resin will need to be regenerated occasionally, you would have to make sure the model is fitted with an automated backwash – regeneration control device.

Particle Filters

Sediment filtration capsules eliminate any kind of suspended solids which might be twenty microns or greater. For additional refinement, the feed water is additionally filtered through a second heavy-duty sediment filtration system, which in turn takes away all suspended solids all the way down to 5 microns in volume.

Pressure Pump

The subsequent step is designed for the feed water to circulate throughout a high pressure pump. This pump is implemented to accomplish the appropriate pressure, volume and flow in order for the water to be sent to the Reverse Osmosis units in the appropriate condition.

Reverse Osmosis Membranes

Reverse Osmosis filters are the most important part of the pre-filtration process. The main objective of the Reverse osmosis membranes will be to eliminate close to ninety-eight % of the total dissolved solids (TDS) which might be within the actual feed water. The amount of membranes within a reverse osmosis filtration system will directly determine the permeate and / or product water output of the unit. Its crucial to safeguard the membranes with the right pre-filtration levels.

Storage Tanks

The filtered water produced throughout this process will be able to be stored within a water storage tank, considering that we are operating with drinking water, each water storage tank will need to be manufactured from approved polyethylene materials. The tanks will need to be complete with a sealed manway designed for sanitary purposes. Generally, these types of water tanks will include an air-filter mounted on the top in order to avoid ambient contaminants from going into the tank.

Post Filtration

Although the water within the tanks is incredibly pure what we don’t know is how long it has been there. In order to make sure the water is fresh prior to its distribution it will need to go through a, carbon block and sub-micron post filter in order to enhance water taste as well as eradicate all particles.


In order to keep the processed water completely free from bacteria and also to maintain its freshness it will need to be sterilised with the use of ultra violet before use. The filtration process will be able to eliminate all bacteria, spores and cysts that might be present. The primary cycle within Ultra-violet treatment is known as a continual cycle disinfection procedure. This allows water within the storage tanks to constantly pass through the Ultra-violet filter and return back to the water storage tank. This prevents bacteria from developing inside the storage tanks.

It is without doubt that modern purification and water filter techniques have been able to create a highly refined 100% pure drinking water though the stages described above, in order to generate a great quality end product an understanding the process involved is crucial.