Which of the following is called as air diffusion method?a)Activated sludge aerationb)Diffused air aerationc)Mechanical aerationd)Combined aerationCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Diffused air aeration
Diffused air aeration is the method in which air is diffused into a liquid, typically water or wastewater. This process is commonly used in wastewater treatment plants to introduce oxygen into the water to promote the growth of aerobic microorganisms that break down organic matter.

Explanation:
- Process: In diffused air aeration, air is forced through a diffuser, which breaks the air into small bubbles. These bubbles rise to the surface of the water, providing a large surface area for oxygen transfer.
- Efficiency: This method is highly efficient in transferring oxygen to the water due to the large surface area of the bubbles.
- Benefits: Diffused air aeration helps in maintaining proper oxygen levels in the water, promoting the growth of aerobic bacteria that are essential for the treatment of organic matter.
- Usage: This method is commonly used in activated sludge systems, lagoons, and other biological treatment processes in wastewater treatment plants.
- Cost: While diffused air aeration can be more energy-intensive compared to other aeration methods, it is often preferred for its efficiency and effectiveness in wastewater treatment.
In conclusion, diffused air aeration is an important method for introducing oxygen into water for biological treatment processes, especially in wastewater treatment plants.

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