Ardmore, Oklahoma 73401
Telephone (580) 220-2831
Fax (580) 221-2544
Carol Anderson, Superintendent
of Ardmore operates a wastewater treatment facility located
immediately north of the Valero Refinery on Sutton Road near Mesa
Road. The Facility, which was built and put on line in 1985, treats
the entirety of the City’s domestic wastewater.
treatment plant process is a Sequencing Batch Reactor system which
biologically treats approximately 6 million gallons per day (mgd).
The City’s normal average flow is about 3.5 mgd. The treated water
is into Sand Creek which flows into Caddo Creek. There are various
states of process that the wastewater follows through the Facility.
Here is that process which it follows:
• Wastewater enters the Plant at the Main Lift Station which
pumps the wastewater into and through the Grit Building. The Main
Lift Station has 4 each 75 Hp pumps that can pump at a rate of about
10 million gallons per day (mgd). From the lift station the sewage
flows through an aerated grit removal system. The liquid from this
process is then directed through a mechanical screen which further
removes other solid materials.
Step 2 • The liquid sewage then is directed to one of 4 large
concrete basins, each of which is 100 feet wide, 120 feet long, and
about 20 feet deep, and which hold about 1.5 million gallons. The
liquid sewage accumulates in the selected basin and, once the basin
has properly filled, air is injected into the raw sewage while it is
circulated by a pump in each basin. The combination of circulation
and injected air enables microorganisms to be break-down the sewage.
Ardmore Main Wastewater
• After about 4 hours of aeration, the circulation pump and
blowers are shutdown and the remaining solids in the liquid in the
basin are allowed to settle for about an hour. The water in the
upper half of the basin is clarified and then decanted through a
discharge pipe to the Effluent Lift Station.
• At the Effluent Lift Station the clarified liquid is pumped to
the surface and directed through a series of filters which further
remove any remaining suspended solids. The water at this point is
quite clear but is not yet safe to discharge to the receiving
• It then flows into a Chlorination Basin where the effluent is
mixed with chlorine which is a powerful and effective disinfectant
which kills any remaining bacteria, viruses or coliform. Once the
liquid has been chlorinated, sulfur dioxide is injected to the end
of the basin which reacts with and removes any remaining chlorine in
Step 6 • Once the treated water, which is now
clear and quite clean, leaves the Chlorination Basin, it flows to
and down a cascade into Sand Creek. The cascade reaerates the
effluent liquid which makes it not only safe but wholesome for fish
wastewater treatment process creates a large volume of liquid sludge
which must also be treated. The City treats its sewage sludge by
means of cocomposting with wood amendment. The Cocomposting
Facility receives liquid sludge from the main plant where the wasted
sludge is mechanically-dewatered to the point that it looks like a
dry mud. The dewatered sludge is then carefully mixed with ground
wood chips in such proportions to facilitate composting. The
composting process generates, over a 21 day period, enormous amounts
of heat which reduce the sludge volume, cause it to further dewater
and, most importantly, kills bacteria and viruses. The mixed
composted material, known as Okie Dirt™ is then safe for use as a
soil amendment in gardens, farms or highway rights of way.
13 lift stations throughout the city with the largest station
handling approximately 2 million gallons per day.
of Ardmore also maintains and operates an activated sludge treatment
plant north of the City at the Ardmore Industrial Airpark. This
plant handles domestic wastewater as well as wastewater from
industries at the Airpark.