Our water reservoirs and
rivers supply the water we use in our homes. This water is piped to municipal
water treatment plants to remove sediment, algae, contaminants and
microorganisms using chlorination and filter systems.
A combination selected
from the following processes is used for municipal drinking water treatment
worldwide:
Pre-chlorination for algae control and arresting
biological growth
Aeration along with pre-chlorination for removal
of dissolved iron when present with small amounts relatively of manganese
Coagulation for flocculation or
slow-sand filtration Coagulant aids, also known as polyelectrolytes –
to improve coagulation and for more robust floc formation
Sedimentation for solids separation that
is the removal of suspended solids trapped in the floc
Filtration to remove particles from water either
by passage through a sand bed that can be washed and reused or by passage
through a purpose designed filter that may be washable.
Disinfection for killing bacteria viruses and other pathogens.
Norb Leahy, Dunwoody
GA Tea Party Leader
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