How many stages of water purification are there?
The filtration systems for drinking water usually incorporate a five-stage filtration process: sediment, mechanical, chemical, mineral, and bacterial.
What is the first stage of water treatment?
Coagulation and flocculation are often the first steps in water treatment. Chemicals with a positive charge are added to the water. The positive charge of these chemicals neutralizes the negative charge of dirt and other dissolved particles in the water.
What are the different methods of water purification?
Water Treatment FILTRATION, DISINFECTION & STORAGE: FILTRATION: The water passes through filters, some made of layers of sand, and charcoal that help remove smaller particles. DISINFECTION: A small amount of chlorine is added or some other disinfection method is used to kill microorganisms that may be in the water.
Which is the second stage in the purification of water?
FILTRATION • It is the oldest and Universal method of purification. • Filtration is the second stage in the purification of water. • This filtration reduces the bacterial content by 98- 99%, turbidity by 50 PPM to 5 PPM and colour to colurless.
What is the purpose of water purification on a large scale?
Purification of Water on Large Scale • The purpose of water treatment is to produce water that is safe & wholesome. • The method of treatment to use depends upon the nature of raw water & the desired standards of water quality. Ex: Ground water (wells & springs) may need no treatment other than disinfection.
What are the steps in the water treatment process?
• Screening (remove relatively large floating and suspended debris) • Rapid-mix (mixing water with chemicals that encourage suspended solids to coagulate into larger particles that will settle easily) • Flocculation (gently mixing water and coagulant allowing the formation of large particles of floc) Conventional Surface Water Treatment