Civil Engineering - UPSC Civil Service Exam Questions - Discussion
Discussion Forum : UPSC Civil Service Exam Questions - Section 20 (Q.No. 14)
14.
A septic tank of 7 m3 in volume serves for 5 people. If the rate of accumulation of sludge is 70 litres per capita per year and sludge is removed when it occupies 50% of its volume, what is the cleaning interval of septic tank ?
Discussion:
1 comments Page 1 of 1.
Arul said:
8 years ago
Volume/discharge = detention time.
Discharge = population * rate of accumulation of sludge = 70 * 5.
So, (0.5 * 7 * 1000)/(70 * 5) = 10 yr.
Discharge = population * rate of accumulation of sludge = 70 * 5.
So, (0.5 * 7 * 1000)/(70 * 5) = 10 yr.
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