Under the twin-pit pour-flush toilet model promoted nationally for rural sanitation, the recommended minimum interval before the first pit is emptied and its contents reused as compost is approximately:
- A 3 months
- B 2 years ✓
- C 6 months
- D 5 years
Correct answer: B. 2 years
Explanation
In the twin-pit system the pits are used alternately. Once one pit fills, it is closed and the second pit is brought into use; the filled pit is allowed to stand for at least about two years so that aerobic and anaerobic decomposition renders the contents safe humus suitable for handling. Emptying at 3 to 6 months leaves pathogens viable, defeating the design purpose.
Reference: Park's Textbook of Preventive and Social Medicine, 27th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
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