wastewater treatment

What is the first step in wastewater treatment?

Removes large solids (e.g., sticks, trash) using screens and grit chambers.

What happens during primary treatment?

Settles out solid waste (sludge) by allowing wastewater to sit in a sedimentation tank.

What is the purpose of secondary treatment?

Uses biological processes (microorganisms) to break down dissolved and suspended organic matter

What are common methods used in secondary treatment?

Activated sludge, trickling filters, or oxidation ponds.

What is the final step to further clean the water?

Removes nutrients (like nitrogen and phosphorus), bacteria, and remaining solids using filtration, chemicals, or UV light.

What is disinfection in wastewater treatment?

A step in tertiary treatment where pathogens are killed, typically using chlorine, UV light, or ozone.