Water Treatment & Distribution System Overview.
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Transcript of Water Treatment & Distribution System Overview.
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Water Treatment & Distribution System Overview
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Two units located at separate sites provide for continuous monitoring and control of the water and sewer systems.
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Primary water source
Seven wells with capacity of over 10 MGD
Water conveyed to treatment plant via a river crossing and 2 miles of raw water line
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Installation of raw water line in 1975
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Capable of treating 5.4 MGD
Designed for Iron and Manganese Removal
State of Ohio Class III plant (second highest level of plant)
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Clearwell
Clearwell
Water Treatment Plant
Medium Service Booster Station
AbandonedClearwell
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Prechlorination for Iron & Manganese Reaction
KMnO4 for Iron & Manganese Reaction
Polymer & Chlorine for Filter Conditioning
Chlorine for DisinfectionFluoride for Dental Health
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8 multi media filters
Provide iron & manganese removal
Typical Filter Configuration of gravel, garnet, sand and anthracite
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o Done based on effluent turbidityo Water is pushed back through
filters removing build up of iron and manganese
o Used water is sent to the sewage system
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Potassium Permanganate Anionic Polymer Chlorine (Pre and Post) Fluoride
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Used for manganese removal
Strong Oxidizer Not combustible
but could enhance combustion of other materials
Gives off irritating fumes in fire
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Use gaseous chlorine for disinfection and treatment
Strong Oxidant Not combustible
but reacts violently w/combustibles
High health hazard
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Add hydrofluosilicic Acid for dental health
Corrosive Not flammable but
reacts with many metals to produce flammable and explosive hydrogen gas
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Used as a filter aid
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Maintain OEPA bacteriological and chemical certifications
Conduct daily testing for chlorine, fluoride, pH, turbidity and other process controls
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Parameter Typical Results
Iron 0.08 to 0.12 mg/lManganese 0.3 to 1.5 mg/lpH 7.5 to 8.0Chlorine NoneFluoride 0.2 mg/l
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Parameter Typical Results
Iron Below detectable limit
Manganese 0.02 mg/lpH 7.5 to 8.0Chlorine 0.8 mg/lFluoride 1 mg/l
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Two 1.5 million gallon clearwells used to store finished water
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Due to the geography of the city, three different pressure zones have been defined – low, medium and high.
Some parts of the system operate off of gravity.
Other parts must have assistance so booster pumps are used.
Water pumped and stored in tanks provides pressure head.
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Located at the Water Treatment Plant
Pumps water to the low service area and Fairfield Park Tank
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A – From PlantB – Booster StationC – To Primary Mains/ CustomersD – Water Tower
Water Towers are tall to provide pressure. Each foot of a height provides .43 pounds of pressure. So a tank that is 100 foot tall has a pressure of 43.3 pounds at its base.
There is only one pipe through which water both goes in and comes of our water towers. If water is being pumped from the treatment plant and the demand does not require it, it will go into a water tower. However, if there is more demand than the treatment plant can supply then water will be taken from the tower.
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Services low service area
0.5 million gallons
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Across from the Water Treatment Plant
Services Medium Service & Rona Hills Tank
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2 million gallons ground storage tank
Services medium service
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Old Fire Station Services Medium
Service Pumps to Five Points
Tanks
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Two towers• .75 MG• .25 MG
Services Medium Service
Hosts city antennas
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Located near Wright State University
Services High Service Area
Pumps to Southwest Tank
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0.5 million gallons Actually located in
Beavercreek Services high
service