The figure illustrates the process of eliminating salt from seawater to transform it into drinking water. Generally, it is clear that there are four stages in the production of drinking water. The process begins with pre-treatment for sea water, and ends at the integration stage.
At the first stage of the process, a huge amount of sea water is transported to a pre-treatment filter system via salt water intake so that many solid objects which are relatively large size or undrinkable substances can be separated from salt water and then returned to the sea. Next, salt water is forced through a membrane at high pressure in order to only allow water molecules to pass though whereas all other impurities as well as salt are kept and sent back to the sea.
Regarding the remaining stages of the process, water continues to be carried to a post-treatment system which adds various substances, for instance, lime, chlorine, and fluoride into water to kill any harmful bacteria. By this time, water now becomes cleaner and drinkable. Eventually, such drinking water is contained in storage and is ready to be delivered to the public via a water supply system
The figure illustrates the
process
of eliminating
salt
from seawater to transform it into drinking
water
.
Generally
, it is
clear
that there are four stages in the production of drinking
water
. The
process
begins
with pre-treatment for sea
water
, and ends at the integration stage.
At the
first
stage of the
process
, a huge amount of sea
water
is transported
to a pre-treatment filter system via
salt
water
intake
so
that
many
solid objects which are
relatively
large size or undrinkable substances can
be separated
from
salt
water
and then returned to the sea.
Next
,
salt
water
is forced
through a membrane at high pressure in order to
only
allow
water
molecules to pass though whereas all other impurities
as well
as
salt
are
kept
and
sent
back to the sea.
Regarding the remaining stages of the
process
,
water
continues to
be carried
to a post-treatment system which
adds
various substances,
for instance
, lime, chlorine, and fluoride into
water
to kill any harmful bacteria. By this time,
water
now
becomes cleaner and drinkable.
Eventually
, such drinking
water
is contained
in storage and is ready to
be delivered
to the public via a
water
supply system