Question

Match the following treatment process with the stage of wastewater treatment.

1. Flocculation
2. Aerobic digestion
3. Aeration
4. Screening
5. Sedimentation

Answer 1

Wastewater treatment processes such as Screening, Sedimentation, Flocculation, Aerobic digestion, and Aeration correspond to stages of wastewater treatment, specifically, primary treatment (Screening, Sedimentation, Flocculation) and secondary treatment (Aerobic digestion, Aeration).

Step-by-step explanation:

To match the following treatment process with the stage of wastewater treatment, we refer to the standard stages at a sewage treatment plant: primary treatment, secondary treatment, and tertiary treatment. Here is the matching:

• Screening is part of the pretreatment and primary treatment to remove large debris.
• Sedimentation is also a part of primary treatment where solids separate and settle from the wastewater.
• Flocculation usually occurs before sedimentation, helping to clump together particles so they settle more easily, thus it is often associated with primary treatment.
• Aerobic digestion and aeration are part of the secondary treatment where microorganisms break down organic matter with the help of oxygen.

Specifically:

1. Flocculation - Primary Treatment
2. Aerobic digestion - Secondary Treatment
3. Aeration - Secondary Treatment
4. Screening - Primary Treatment
5. Sedimentation - Primary Treatment