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Water and Wastewater Plant Directory
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Chagrin Falls, Ohio, USA
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Chagrin Falls WWTF
c/o Chagrin Falls Village Hall
21 West Washington Street
Chagrin Falls, Ohio, 44022
USA
Contact Information:
Contact: Bill Sinex
Email:
Telephone: 440-247-5050
Fax: 440-247-1510
Plant Operation: Municipal
Processing: Wastewater
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Web site:
http://www.chagrin-falls.org/Services/waterworks.html
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Plant/Process Description:
Bar Screen: The Bar Screen is utilized for
removal of heavy debris that could cause damage
to pumps and clog pipes. This includes rags,
sticks, rocks and large chunks of grease.
Grit Tank: The term grit is used for material
that would cause wear on pumps and other
equipment. Sand, gravel, eggshells and coffee
grounds are all types of grit. When the flow of
water is slowed down the heavier material will
settle to the bottom and can be removed by the
bucket elevator. The grit is then disposed of at
a landfill.
Influent Pump Controller: The influent pump
controller allows the alternating of all three
raw sewage pumps. Equalization of wear and
adequate exercise of all pumps to maintain
lubrication are the benefits as well as greater
control over influent wet well levels.
Primary Treatment: The primary tanks are used
for the removal of heavy solids and grease. Heavy
sludge settles to the bottom where the flights
(scrapers) move it into hoppers. The sludge is
drawn from the hoppers then pumped to the
digesters. The grease is skimmed off the top and
sent to the same tank. Each primary tank holds
about 42,000 gallons of water.
Expanded Aeration Capacity: The aeration tanks
were originally designed for BOD (Biological
Oxygen Demand) removal only. Now we also use them
for removal of ammonia as dictated by our NPDES
permit (National pollution discharge elimination
system). The permit changed in 1990 to include a
parameter for ammonia and it was deemed necessary
that three tanks would be needed for ammonia
removal at our design flow of 1 MGD. Current flow
necessitate the use of only 2 tanks, however all
three are utilized for maximum efficiency.
Secondary Treatment: The final tanks are used
for removal of solids that would not readily
settle in the primary tanks. This sludge is then
returned to aeration to maintain a proper balance
of solids for treatment.
Return Activated Sludge (RAS) Controls and
Division Chamber: The return sludge pumps are
equipped with variable frequency drive (VFD)
controls and motors, which are in turn controlled
by a RAS well level controller. The sludge is
pumped to a division chamber where it is returned
to the aeration tanks. A small amount is
constantly diverted (wasted) to the primary tanks
to maintain a stable quantity of activated sludge
in the aeration process. Wasted sludge is then
dewatered and taken to a PPG land reclamation
site.
Tertiary Rapid Sand Filters: The traveling
bridge filters were put online in March of 1992.
They assist the plant in maintaining suspended
solids in the effluent at less than the 12-mg/l
limit set in our permit. In the 12 months prior
to their installation the WWTP averaged 11-mg/l
suspended solids discharged with two violations
of the limit. An average of less than 3.5-mg/l
has been maintained since the filters were
brought online. This translates into about 22,000
lbs. of solids prevented from escaping the
treatment plant every year!
Chlorine Disinfection: The chlorine disinfection
system includes the ability to chlorinate the
effluent water prior to filtration as well as
after filtration. This allows plant operators to
control coliform bacteria, keeping them within
NPDES permit limits.
Digesters: The digesters are used for the
breaking down of raw sludge. They utilize air for
this purpose. After the “volatile content” (odor
causing) of the sludge is reduced it is pumped up
to the belt filter press.
Ashbrook Sludge Press: The one meter Ashbrook
Belt Filter Press was added in 1995 to aid in
sludge removal. Previous filter presses were only
able to achieve a solids content of about 10%.
The Ashbrook press averages 18-21%. This
translates into a large savings for the village
because more sludge is removed by volume.
High Flow Equalization Tank: Due to the aging
sewer collection system, large volumes of storm
runoff infiltrate the sanitary sewer system. At
times these storm flows exceed the capacity of
the Wastewater Treatment Plant. In the past, this
excess flow was diverted through the old
treatment plant into the river with settling
being the only treatment. To eliminate this
bypass of untreated sewage to the river a 697,000-
gallon tank was constructed on the site of the
old Solon Rd. Wastewater Treatment Plant.
(Currently the service dept. garage) Since the EQ
tank was put into service in April 1992 over
10,000,000 gallons of raw sewage have been
prevented from entering the river.
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Owner:
Village of Chagrin Falls
Web site:
http://www.chagrin-falls.org/
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Operating Company:
Village of Chagrin Falls
Web site:
http://www.chagrin-falls.org/
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Directions:
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Disclaimer:
Water and Wastewater.com provides the information on
this page for reference purposes only. We do not certify
the accuracy of the information provided by third-party
individuals for this listing.
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