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History
- Implements a
pre-treatment program which regulates the discharge of wastewater from
non-domestic industrial sources city wide
- Monitors the
pre-treatment programs of Peoria and Sun City
- Has been in
operation since 1968
- The original 4.7
MGD plant has two expansions
- 1981 to 8.3 MGD
capacity
- 1988 to treat an
average dry weather flow of 17.5 MGD
- Treats wastewater from the cities of Tolleson, Peoria and Sun
City
- Treated effluent
is piped to the Palo Verde Nuclear Generating Station
- In the event that
Palo Verde cannot accept the effluent, it is discharged to the Salt
River under a AZPDES Permit
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WWTP process
Liquid Stream
- Mechanical bar screens
- grit removal
- primary sedimentation tanks
- first-stage trickling filters
- intermediate clarifiers
- second-stage trickling filters
- sludge re-aeration basins
- solids contact channels
- secondary clarifiers followed by
disinfection
Solids Stream
- Primary sludge
pumps
- waste secondary
sludge pumps
- gravity belt
thickener
- low pressure
steam boilers
- anaerobic
digesters
- facultative
sludge basin
- belt filter press
- drying beds and
bio-solids windrows
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