Why it is necessary to purify the water ? 

Well, for starters, it helps to know that Water is a universal solvent. Anything and everything in the planet earth dissolves in it, though in varying degrees.And water body is a breeding ground  for  any number of micro organisms ,pathogenic or not.     

Considering these basic facts its literally dangerous to consume water as such.

And how do you purify water? 

Process  of Purification start with identifying source of water.

To start with we are considering normal well water.

 Know that Purification involves mechanical as well as chemical methods. We often use the term water treatment for purification process.

Let's begin with Filtration.There are  3 categories , each involves several modes, in Water Filtration

Primary Filtration.

Secondary Filtration 

Tertiary or Adavanced Filtration

Let's discuss the process involved in the Primary Filtration , where domestic water supply is involved;

Primary Filtration, through Pressure Sand Filter

   The raw water is collected in the collection tank which also acts as a pre-sedimentation basin. Pre-sedimentation allows the suspended  particles to settle down increasing the efficiency of the filtration  process, Water is drawn from the settling tank through feed pump and subjected to primary filtration through a Pressure Sand Filter. In Sand filter ,media is enclosed in a vessel and water is forced through it under pressure, The unit filters out particles  larger than their specified pore sizes. The pore size between sand particles are 20 to 40 microns, one micron bieng 1/100th of a mili mtetr.Primary filtration removes turbidity, odour , colour and taste.This sort of Filtration is also called "deep bed Filtration"

A schematic diagram of sand filtration

 And down below is  the picture of an actual sand filtration unit

What you see in the picture is the Sand Filtration part of a  Water Treatment plant,,Designed, Supplied &  Commissioned by us, Trueline Water Technologies, in an apartment complex, in Aluva..

And in the next session  we will discuss another mode of Primary Filtraion, called Slow Filtration.

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