Q4. Describe, with the aid of a sketch, a Membrane Bioreactor type sewage treatment plant. (10)
Q5. Describe, with the aid of a sketch, the operation of a biological sewage treatment plant (10)
Q4. With reference to an aerobic sewage treatment plant:
(a) Explain the need for continuous aeration (6)
(b) Describe the hazards that may be present when the plant requires internal maintenance or inspection. (10)
Q4. a) Describe a vacuum sewage system. (5)
b) List the advantages of the system described in part (a). (4)
c) State why untreated sewage should not be allowed to stagnate. (1)
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