Question

Primary treatment of waste water includes

• A. Sedimentation
• B. Aerobic treatment
• C. Anaerobic treatment
• D. Biological oxidation

Hint:

Sedimentation is the primary treatment method for separating solids in waste water before further treatment stages.

Answer 1

The Correct Option is A

Step 1: Understanding Primary Treatment of Waste Water
The primary treatment of waste water is the first step in the treatment process, aimed at removing large particles, debris, and sediments. This is usually achieved through physical methods such as sedimentation.

Step 2: Process Explanation
In sedimentation, the waste water is held in a large tank where heavier particles settle to the bottom, allowing for the removal of solid waste. This is a purely physical process.

Step 3: Conclusion
Among the options, sedimentation is the correct process involved in the primary treatment of waste water.

Step 4: Quick Tip
Primary treatment focuses on the removal of suspended solids, and sedimentation is the most common method used for this purpose.