problem 1: What are the main differences between unit operations and unit processes?
problem 2: Define the term wastewater. Why do we want to treat it?
problem 3: prepare a detailed note on various types of screens which are used in primary treatment of wastewater.
problem 4: How many types of grit chambers can be used in the primary treatment process?
problem 5: What is the principle lying behind sedimentation?
problem 6: Which qualities a chemical must possess for being a coagulant? Name some chemicals being used as the coagulants, how you will find out coagulant dose for the treatment of wastewater?