Download Drinking Water Treatment

Drinking Water Treatment
 Reservoir water is pumped to a facility
 First treated with chemicals to remove any
particulate materials
 Water is then passed through several filters of
sand, gravel, and charcoal to remove impurities
 Water s then treated with chlorine and undergoes
UV treatment for a final disinfection
What is Wastewater?
Water that people have used
Water from showering, washing,
washing machines, dishwashers
Water that carries sewage from
bathrooms
Water used from manufacturing or
industrial cleaning processes
Storm runoff
Rural Wastewater Disposal
 Designed to separate solids from liquids
 Digestion and storage of organic matter which allow for
more liquid discharge into a leach field in the
surrounding soil
 Combination of pipes and soil make up the leach field
where the natural microorganisms in the soil break the
soil down further
Urban Wastewater Disposal
 Primary Treatment
 Physical Removal of
contaminants in the
settling tanks and
clarifiers
 60% of suspended solids
are removed in this
process
 Secondary Treatment
 Biological process
that leads to an
aeration basin which
is stirred and
oxygenated with
aerobic bacteria that
can degrade the
organic pollutants
 90% of the
suspended organic
solids are removed
Urban Wastewater Disposal
 Tertiary Treatment
(Advanced)
 Physical or Chemical
 Removes specific
pollutants left in the
water after the first
and secondary
treatments
 Could be toxic
metals, excess
nitrates, fertilizers
from runoff
 Final Treatment
 Water is treated with
chlorine, ozone, or
ultraviolet light to kill any
infectious agents, where it is
them pumped into a river or
aquifer where populations
will draw their water from
What is left after?
SLUDGE
 Solid material that is removed
during the treatment process
 Partially dried on site and is
wither taken to local
municipal incinerator or
disposal at a landfill
 Some can be used as
fertilizers for cropland, some
could be used as industrial or
manufacturing byproducts