Describe Two- Pit Latrines? Advantages and Disadvantages of Two - pit Latrines. 

Nitrogen Removal in Municipal Waste Water Engineering

What is Biological Nitrification ?

What is Biological Denitrification ?

Phosphorus Removal in Municipal Waste Water Engineering.

Explain septic tanks with neat Diagram .

Design Consideration. Advantages and Disadvantages of Design consideration. 

Describe Two- Pit Latrines? Advantages and Disadvantages of Two - pit Latrines. 

Expalin Eco - Toilet  ? Advantages and Disadvantages. 

Soak Pits ? Advantages and Disadvantages of soak pit