💧 Activated Sludge Process – Heart of the System 💧

The Activated Sludge Process is a biological wastewater treatment process used to remove organic matter from sewage and wastewater.

The most important part of this process is the place where microorganisms actively work.

The heart of this entire process is called the Aeration Tank.

In the Aeration Tank:

• Wastewater is mixed with activated sludge
• A continuous supply of oxygen (air) is provided
• Bacteria oxidize the organic matter

This is where the main biological treatment takes place, which is why it is called the Heart of the Activated Sludge Process.

Why are the other options incorrect?

Sludge digester → This is for the digestion of sludge; the main treatment does not occur here.

Primary sedimentation tank → This only serves to settle heavy particles.

Final settling tank → This is used to separate sludge; biological activity does not occur here.

✅ Exam Point:
The Heart of the Activated Sludge Process is →
➤ Aeration Tank
This question is frequently asked in Environmental Health, Community Health Nursing, and Sanitary Engineering exams.

📌 Disclaimer: This material is for nursing and paramedical exam preparation only. For actual technical use, please refer to standard textbooks and guidelines.

💚 Exam Objective Nursing – Asha D
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