Waste
Water
Microbiology
Apart
from
drinking
water,
in
urban
areas,
the
household
consumption
of
water
is
about
150
litres
per
day
per
person.
Water
is
used
for
bathing,
washing
clothes,
washing
utensils
and
flushing
toilets.
This
domestic
water
consumption
may
vary
with
the
lifestyle
of
community
and
the
availability
of
water.
Most
of
the
water
taken
into
the
house
may
be
returned
as
wastewater
through
drainage
system.
Moreover,
industries
also
consume
large
quantities
of
water
and
contribute
to
the
discharged
effluent.
All
these
waste
waters
contain
organic
and
inorganic
wastes
as
suspended
or
dissolved
matter.
In
addition
they
may
also
contain
microorganisms,
including
those
of
faecal
origin
and
pathogenic
nature.
The
wastewater
discharged
through
the
drainage
system
has
to
be
properly
disposed.
They
can
not
be
simply
disposed
off
into
water
bodies
or
landscapes
because
of
the
oxygen
demand
they
exert
and
also
due
to
the
presence
of
pathogenic
microorganisms
in
them.
So
before
disposal
wastewater
has
to
be
properly
treated
either
by
physical,
chemical
or
biological
methods.
.
|