Sadly, in this day and age there are few if any place where water which is a necessity of life and most abundant substance on earth is safe for consumption without any form of treatment no matter how pure we think they might be. Water if not treated may contain harmful substances, microorganisms, bacteria, parasites, etc which can cause a variety of ailment.
Water is composed of two molecules of hydrogen, and a molecule of oxygen which are chemically bound together thus giving the molecular formula H2O. Water can be of solid, liquid, or gaseous form and its purest source is from rainwater though other water bodies such as oceans, rivers, lakes, etc hold large amounts of water.
Water is composed of two molecules of hydrogen, and a molecule of oxygen which are chemically bound together thus giving the molecular formula H2O. Water can be of solid, liquid, or gaseous form and its purest source is from rainwater though other water bodies such as oceans, rivers, lakes, etc hold large amounts of water.
The goal of all water treatment process is to remove existing contaminants in the water or reduce the concentration of such 
contaminants thus, making it safe for its desired end-use. These processes can be of physical process such as settling and filtration or chemical process such as disinfection and coagulation. Biological processes are also employed in the treatment of waste water and this process may include aerated lagoons, activated sludge or slow sand filters.
contaminants thus, making it safe for its desired end-use. These processes can be of physical process such as settling and filtration or chemical process such as disinfection and coagulation. Biological processes are also employed in the treatment of waste water and this process may include aerated lagoons, activated sludge or slow sand filters." note that these processes all involves the use of principles in chemistry."
Substances removed during the tretment process, range from bacteria, algae, viruses, fungi, and minerals such as iron, manganese, and sulphur. Man made chemical pollutants including fertilizers are also removed.
A combination of the following processes is used for the municipal drinking water treatment world wide;
1. PRE-CHLORINATION: Employed for algae control and arresting any biological growth.
2. AREATION: Along with pre-chlorination for the removal of dissolved iron and manganese.
3. COAGULATION: Employed for flocculation.
4. POLYELECTROLYTES: Also known as coagulant aid is employed to improve coagulation and for thick floc formation.
5. SEDIMENTATION: For solid seperation, that is, removal of suspended solids trapped in the floc.
6. FILTERATION: For removal of carried over floc.
7. DISINFECTION: For killing bacteria.
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