problem 1: Name the main methods from where the inorganic ions can be eliminated.

problem 2: describe the principles and problem in using evaporation and its main use.

problem 3: describe the principle and problems in using dialysis and its main use.

problem 4: Name the algae which are used for and when are they most helpful in waste treatment?

problem 5: What miscellaneous techniques are as well available for removing the minerals?

problem 6: What are the merits and demerits of lagooning?

problem 7: In brief describe the configuration and operation of a trickling filter unit.

problem 8: Illustrate the purpose of recirculation in a trickling filter?

problem 9: What do you mean by the term hydraulic and organic load?

problem 10: How does temperature influence a trickling filter and biological rotatory contactor operation?

problem 11: Draw a flow diagram of an activated sludge treatment procedure.

problem 12: In brief describe the configuration and operation of a biological rotatory contactor. In what manner is it similar to a trickling filter system?

problem 13: What do you meant by the term mixed liquor?

problem 14: What do you mean by the term waste activated sludge?