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GATE Civil Engineering (CE) 2014 Shift 2 Solved Paper
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Question : 58
Total: 65
An effluent of a flow rate of 2670 m
3
/day from a sewage treatment plant is to be disinfected. The laboratory data of disinfection studies with a chlorine dosage of 15 mg/litre yield the model N
t
= N
o
e
(-0.145t)
where N
t
= Number of organisms remained at any time t (in 'min')and N
o
= Number of initial organisms at time t = 0. The volume of disinfection unit (in m
3
) required to achieve a 98 % kill of micro-organisms is ______________
35
50
45
85
Validate
Solution:
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