Function
Extended aeration plants provide stable treatment performance and are suitable for small to medium-sized communities. They operate at longer times, ensuring comprehensive wastewater treatment and higher removal efficiencies.
Designs may vary based on specific factors and requirements.
ADVANTAGES
⸺ Influent Screening
Wastewater undergoes preliminary screening to remove large objects and debris.
⸺ Equalization
Wastewater is mixed and held in an equalization tank to balance flow rate and load variations.
⸺ Aeration Basin
Wastewater is transferred to an aeration basin containing aerobic microorganisms.
⸺ Aeration
Air or oxygen is continuously supplied to the basin, allowing microorganisms to break down organic matter.
⸺ Sludge Settling
Microorganisms and suspended solids settle at the bottom as sludge in a secondary clarifier.
⸺ Sludge Recirculation
Some settled sludge is recycled back to the aeration basin to maintain microorganism populations.
⸺ Effluent Discharge
Clarified effluent is discharged or further treated, while excess sludge is removed.