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With Reference To Bio-Toilets Used By The Indian Railways, Consider the Following Statements:

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 statements given above is/are correct?(2015)

a) 1 only

b) 2 only

c) Both 1 and 2

d) Neither 1 nor 2

Answer: D

Under the bio-toilet concept of the DRDO, the bio-digester tank in every toilet is filled with inoculums containing four types of bacteria. The water trap system in the toilet prevents air from getting into the tank, the human waste is processed by anaerobic bacteria in seven chambers in the tank and the methane gas is allowed to escape into the air.

Source: http://www.thehindu.com/news/national/tamil-nadu/biotoilets-in-trains-by-2022/article6069104.ece


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