1-FILTRATION ACTION:
when the water obtained from the previous steps forced to pass through the filtration media ,the following actions are achived:
a) straining action
b)sedimentation and coagulation action
c) electrolytic action
d)bacterial action
2-filtration technique
4- back washing technique
when the water obtained from the previous steps forced to pass through the filtration media ,the following actions are achived:
a) straining action
b)sedimentation and coagulation action
c) electrolytic action
d)bacterial action
2-filtration technique
4- back washing technique
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