| With reference to bio-toilets used by the Indian Railways, consider the following statements. |
| 1. The decomposition of human waste in the bio-toilets is initiated by a fungal inoculum. |
| 2. Ammonia and water vapour are the only end products in this decomposition which are released into the atmosphere. |
| Which of the statement(s) given above is/are correct? |
A) Only 1
B) Only 2
C) Both 1 and 2
D) Neither1nor 2
Correct Answer: D
Solution :
Exp. [d] The decomposition of human waste in the bio-toilets is initiated by a bacterial inoculum (and not fungal). Carbon dioxide and Methane are the end products released into the atmosphere. When human excreta comes in contact with bacteria, it gets converted into methane and water through a series of steps of anaerobic digestion-hydrolysis, acidogenesis, acetogenesis and methanogenesis. Hence, option [d] is correct.
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