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PLANT OPERATIONS
PLANT SPECIFICATIONS
Built in 1975
Major upgrade in 1997
Design Capacity: 7.5 million gallons per day (MGD)
Mode of Treatment: Biological & Chemical Treatment systems.
BIOLOGICAL TREATMENT SYSTEM:
31 acres of aerated lagoons
90,000,000 gallon storage capacity
40 to 45 day detention time
2 300 hp blowers produce 7,000 scfm each
4 50 hp blowers produce 1,100 scfm each
Lagoon No. I
1,600 ft north to south, 500 ft east to west, 10 ft depth
392 sub surface air diffusers
Lagoon No. II
1,280 ft north to south; 250 ft east to west; 10 ft depth
104 sub surface air diffusers
Biological Treatment reduces concentrations of:
Biological Oxygen Demand (BOD)
Suspended Solids (ss)
Ammonia Nitrogen (NH3-N)
Secondary Treatment System:
Chemical treatment
Ferric Chloride used to remove total phosphorus chlorine used for coliform control.
Two 375,000 gallon capacity up flow clarifiers for phosphorus removal.
SYSTEM COMPONENTS:
65 miles of sanitary sewer lines.
11 pumping stations.
11 additional pumping stations owned/operated by Pere Marquette Township, Mason County DPW, City of Scottville and Tamarac Village Mobil Home Park also pump sewage to the Ludington WWTP.
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