American Water Acquisition - 2010

8/9/2019 American Water Acquisition - 2010

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100 Bob House Parkway, Suffolk, VA 23432

American Water Acquisition - 2010


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A rural lake in Chuckatuck, VA


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is filled by rain and groundwater run-off.


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An elevatedplatform at the waters edge,


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kept locked and secured,


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is

filled

withpumps

and

pipes

which


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draw surface water from the lake and send it to


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outdoor pools where the treatment processbegins.


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Two large pools on either end of a raised platform

surround six smaller pools in a central walkway.


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The first small pool in the center holds surface waterdrawn from the lake. It is turbid (muddied & unclear)

with suspended particles of dirt and organic material.


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Inside each small pool, metalpaddlewheels

slowly turn the water from the lake and


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theirmotion, aidedby the addition of a

chemical flocculant, causes tiny


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dirt particles to coagulate and float on the

pools surface. The clearer water below


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is then piped along the bottom


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of the two large sedimentation tanks at

either end of the outdoor platform.


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There it is allowed to enterthese large tanks by

slowly rising to the top of circular diffusers.


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Then, as this water sits in each

sedimentation basin,particulate matter

continues to settle to the bottom


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while clearwater at the surface trickles

over a weir at the edge of the tank


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and

runs

along

exterior

channels.

Thesetransport

the

now

clarifiedsurface

water


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inside the adjacentbuilding


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where electrodeionization removes the

last remaining organic contaminants and


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chemical disinfection treats any viruses,bacteria or other pathogens which may

have escaped the filtration process.


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Following

this final

disinfection,

the surface water

that wasfirst pumped

from the

country reservoir,

is at lasttransferred

to


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water storage domes at the edge of the complex.


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Occasionally, the sedimentation tanks usedto clean this surface water must be cleared

of the sludge which the process generates,


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where natural evaporation carries off the water


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and the dried particulate which remains

is removed to a landfill.


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This

deep

groundwater

is storedin huge

fiberglass tanks

beforeit is


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purified with chemicals


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that

havebeen

delivered,

unloaded

and


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stored outside the complex.


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Inside the building, salt and fluoride levels

occurring naturally within the deep-well water


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are reducedbypassing that water

through row upon row of


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electrodialysis reversal units.


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Following this

electronictreatment,

pipes

take

thedeep-well

groundwater

from

the

EDRunits


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and

combineit

with

surface

water

treated

earlier

in thesedimentation

tanks.


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The

resulting

mixture

is

then

agitatedby

right-angle

bends

as itis

pushed


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through

along,

serpentine

pipeline

that

carries

the

blendeddrinking

water


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to storage outside the complex where it awaits

delivery to thousands ofindividual homes.

American Water Acquisition - 2010

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