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ETO – ETO – Section 3 : 2022/AUG/07

Question

Q7.a) With reference to shipboard sewage treatment plants, describe the principle of operation of each of the following:

(i) Biological

(ii) Physical (8)

b) Explain why sewage systems involving aerobic action are to be preferred to those with aerobic action (4)

c) Explain the meaning and significance of biological oxygen demand (4)

Asked in Year/Month/Ques No.

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