Global water resources today is extremely polluted due to a number of reasons. The pollutants may be various inorganic salts, metals, pesticides, oil & grease, aromatics and also a variety of pathogenic organisms. Most of the surface fresh water bodies, ground water, and coastal marine water gets polluted over the years. The major water pollutants and their sources are depicted [...]
The following points highlight the top three methods adopted for purification of water. The methods are: 1. Sedimentation 2. Filtration 3. Disinfection. Method # 1. Sedimentation: Sedimentation is done when water consists of large sized organic materials such as leaves, and gravels which have run off from the soil. Suspended particles settle down depending on their size and weight and [...]
The following points highlight the top four tests for the presence of coliforms in water. The tests are: 1. Sanitary Tests for Coliforms 2. The Most Probable Number of Coliforms 3. The Defined Substrate Test 4.IMViC Tests. Test # 1. Sanitary Tests for Coliforms: The original test for the presence of coliform in water is done by standard multiple tube [...]