Step-1: Coagulation
Coagulation removes fine particles suspended in water, after removing rough debris by filtering through the screen. Alum and other chemicals are added to water to form small sticky particles called floc, which attracts suspended particles.The combined weight of these particles and alum (floc) becomes heavy enough to sink.
Step-2: Sedimentation
Coagulated particles fall gravitationally through the water in a settling tank and accumulate at the bottom of the tank, cleaning water from much solid debris.
Step-3: Filtration
To remove solid particles that were previously unremoved by sedimentation, water from the sedimentation tank flows through:
sand,gravel,coal, andactivated charcoal.
Step-4: Disinfection
Disinfection methods are applied to filtered water to destroy hazardous microorganisms as living organisms. A chlorine residue is added to water when leaving the processing plant to help protect treated water from recontamination when moving through the distribution system.
Further explanation
Chemical precipitation or coagulation with various aluminum salts (e.g., alum), iron, lime, and other organic or inorganic chemicals is widely used to treat water to remove colloidal particles (turbidness) and microbes.
Water treatment with the addition of coagulants and chemical deposits has been carried out since ancient times.
There are main things to know about the different terms of water purification and filtration because they are not synonyms.
Water filtration is a treatment for eliminating debris, and some bacteria as living organisms, through several types of filters like cloth or nets.Water purification is a chemical or UV process (with heat treatment) to deactivate bacteria and other hazardous substances that are not functioning.Learn moreThe reason why water is a compound linkHow many carbon atoms are there in a 1.3-carat diamond? linkTypes of fatty acids link
Keywords: how was the water, filtered, to remove, debris and living organisms, microorganisms, bacteria, microbes, colloidal particles, coagulation, sedimentation, filtration, disinfection, purification
