Question: a) Mr. Abu is trying to find a membrane separation method to treat the surface and ground water from his area before the water is

a) Mr. Abu is trying to find a membrane separation method to treat the surface and ground water from his area before the water is used for his production process. The water in the area is found to be hard with high contents of polyvalent ions. With the aid of a diagram, suggest and explain the membrane separation process that is suitable for the water treatment. (5marks)

b) Extractors can be operated in three (3) modes. Show and differentiate the three modes with suitable diagrams and labels.(5marks)

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