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22 Φεβ 2014 (πριν από 3 χρόνια και 1 μήνα)

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Waste
-
Water Tutorial

Anthony Hand, Period 5

How to Clean your Water

In this presentation, I will
demonstrate how your water is
cleaned, so that you will be able
to drink it, cook with it, and bathe
in it.


Water can get dirty because of
waste, trash, and all other sorts
of pollution.


Pay attention to this cycle to find
out how your dirty and polluted
water is made clean and safe for
use…

The Water Treatment Cycle

Dirty Water

Coagulation


Coagulation removes dirt and other
particles suspended in water


Alum and other chemicals are added to
water to form tiny sticky particles
called “
floc
” which attract dirt particles


The combined weight of the two become
heavy enough to sink to the bottom
during sedimentation


During sedimentation, the heavy
particles (
floc
) settle to the bottom


The clear water then moves to filtration

Sedimentation


The water passes through filters that
help remove even smaller particles


The filters are sometimes made of sand,
gravel and charcoal

Filtration


A tiny amount of chlorine is added to
kill any bacteria or microorganisms that
may be in the water

Disinfection


Water is then placed in a closed tank or
reservoir for the disinfection to take
place. The water then flows through
pipes to homes and businesses in the
community

Storage


And now that the water is clean, you can
use it for whatever you like…so that it
can be cleaned again!

Reusable Water

SOURCE FOR INFORMATION


http://water.epa.gov/learn/kids/drinkingwat
er/watertreatmentplant_index.cfm