Tuesday, November 10, 2009




Water Treatment Stages


Stage 1:Preliminary Treatment

Preliminary treatment involves taking the water form any reservoir and getting it ready for the other stages of the cleaning process.


Stage 2:Coagulation
Coagulation is when the alum is being added and the dirt and other particles are being pushed to the bottom of the water.


Stage 3:Flocculation
Flocculation is when the sediment or the dirt particle's join and link together to create floc. And the floc rises to the top of the water it can be collected.


Stage 4:Clarification
Clarification is when all of the leftover sludge and etc. have fallen at the bottom. And then after a while they collect or scrape the sludge off of the bottom after the water has been moved out and then repeat over and over the same step over.

Stage 5: Filtration
Filtration is when all of the other things that aren't important like the left over dirt and etc moves down to the bottom and the water moves out of the container and is moved to the water tanks and is distributed around though the pipes and into homes.

1 comment:

Anonymous said...

Pretty good work here, Ashley, but for two small points.

1) When Floc coagulates, it sinks, not floats.

2) In the last step, filtration, the water drops through a sand layer, leaving behind the final contaminants.