LIFE SCIENCE

Detailed explanation-1: -Coagulation. Coagulation is often the first step in water treatment. During coagulation, chemicals with a positive charge are added to the water. The positive charge neutralizes the negative charge of dirt and other dissolved particles in the water.

Detailed explanation-2: -The 5 major unit processes include chemical coagulation, flocculation, sedimentation, filtration, and disinfection (described below). There are chemicals added to the water as it enters the various treatment processes.

Detailed explanation-3: -During the filtration process in water treatment, (1) raw water enters through the filter’s inlet, (2) first passing through the coarse screen for removal of large debris and sediment, (3) then through the inner fine screen for removal of the remaining smaller particles.

Detailed explanation-4: -Step One: Screening. Source water, either from a natural or industrial source, will typically pass through a screen as it enters industrial filtration systems. Step Two: Coagulation/Flocculation. Step Three: Filtration. Step Four: Disinfection.

Detailed explanation-5: -1 Screening. 2 Aeration. 3 Coagulation and flocculation. 4 Sedimentation. 5 Filtration. 6 Chlorination. 7 Supplementary treatment.