Mention any three stages or steps at the warte w recyded

Biofiltration
Biofiltration uses sand filters, contact filters or trickling filters to ensure that any additional sediment is removed from the wastewater.
Aeration
Aeration is a lengthy process which increases oxygen saturation by introducing air to wastewater. Typically, the aeration process can last for up to 30 hours, but it is very effective.
Oxidation ponds
Typically used in warmer climates, this method utilises natural bodies of water such as lagoons, allowing wastewater to pass through for a set period before being retained for two to three weeks.

Not sure if that’s what you mean

D.haka is the first answer and a.canberra is the second answer