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The City of Marysville
Wastewater System serves the residents and businesses in the
City as well as Milford Center, the Honda of America auto and
motorcycle plants, and Union County along Industrial Parkway.
The current facility treats an average daily flow of
approximately 4.0 million gallons per day (mgd). The
Wastewater Treatment Plant (WWTP) is located on the north side
of Marysville at 620 North Main Street. The WWTP is
staffed seven days a week, 24 hours per day. The
Wastewater Superintendent, Rick Varner, can be reached at (937)
642-1036 weekdays from 8:00am to 4:30pm.

History
The original sewers in
Marysville were installed in 1913. At that time the system
was comprised of about 13 miles of six or eight inch clay
gravity lines and a small pond. In 1932 the first
anaerobic digester was built as well as Imhoff tanks and the
treatment pond was enlarged. In the fifties, two aeration
tanks with agitating aerators were added as well as final
clarifiers and sludge drying beds.
1964 brought the first
large expansion with the addition of another larger primary
anaerobic digester, conversion of the Imhoff tanks to primary
clarifiers, grit removal system, one additional aeration tank, a
blower building and blowers to provide aeration, an additional
final clarifier, and disinfection facilities.
In 1982 construction began
on the existing treatment plant. The facility is a
two-stage activated sludge plant with tertiary filters.
The facility included pretreatment, primary clarifiers,
additional aeration tanks, intermediate clarifiers, second stage
aeration tanks and blower building, final clarifiers, effluent
pumping, tertiary sand filters, chlorine and chemical feed
systems, an equalization basin, administration building with a
laboratory, a secondary anaerobic digester, and new sludge
drying beds. This expansion brought the total design
capacity to 2.3 mgd.
In 1989 work began on a
1.7 mgd Orbal oxidation ditch and an additional final clarifier.
This expansion was added as a second flow train and runs
parallel with the old plant. A small pump station was also
built to split the flow before pretreatment with approximately
58% of the flow directed to the existing 2-stage facility and
42% to the Orbal facility. This brought the total design
capacity to 4.0 mgd.
Two belt filter presses
were installed in 1995 to dewater digested solids. The
first anaerobic digester built in the 1930's was converted to a
lime holding tank to store used lime from the City Water
Treatment Plant to be dewatered along with wastewater biosolids.
In 2000, a new headworks
building with influent pumps, grit removal, fine screens, and
flow diversion structure was constructed. This facility
replaced the pretreatment building constructed in the early
1980's.
In 2003, the anaerobic
digester was converted to an aerobic digester. The
digester was modified and placed in operation in 2005.
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Collection System
The current sewer system
is made up of approximately 89 miles of sewer lines. This
includes both gravity and force mains. The sewers range
from 6 to 36 inches in diameter. The system also includes
14 lift stations and 2,065 manholes.
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New
Facilities
In 2004, the City
completed its Wastewater Master Plan. From the results of
this study, design of the new Water Reclamation Facility (WRF),
to replace and expand the capacity of the existing facility
began in 2005. The new WRF will be located southeast of
the City. The new expanded Marysville Water Reclamation
Facility is planned for "start-up" in late 2008.
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Personnel
The current Division of
Wastewater is comprised of the following:
●Superintendent
- Ohio EPA Class IV Operator's Certificate
●Chief
Operator - Ohio EPA Class III Operator's Certificate
●Five
Operators - OEPA Certified Operator's (Class III, II, and I)
●Lab
Technician - Ohio EPA Class III Operator's Certificate,
Class I Lab Analyst Certificate
●Two
Maintenance Mechanics
●Collection
System Crew Chief - Ohio EPA Class II Wastewater Collection
●Four
Collection System Maintenance Crew Workers - OEPA Collection
Systems Certified (Class II-I)
●Administrative
Assistant
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