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Press Information Bureau
Government of India
Ministry of Railways
02-December-2016 16:40 IST
Bio Toilet Project in Indian Railways

The project of installation of bio-toilets in passenger coaches has not yet been completed. The project is still in progress. More than 49,000 bio-toilets have been installed by Indian Railways in passenger coaches till 31.10.2016.

The additional cost of providing bio-toilets in one coach (4 bio-toilets) is ₹4.0 lakh approximately and for the in-service coaches, which require replacement of structural members for fitment of bio-toilets, the additional cost is approximately ₹ 16.0 lakh per coach.

At present, there are more than 900 trains in which bio-toilets have been introduced either in all coaches or in some coaches of the trains. More and more trains are being progressively augmented with coaches fitted with bio-toilets.

Anaerobic digestion process is applied for the digestion of human excreta in the bio-toilets that are being fitted in passenger coaches of Indian Railways. No human excreta is thrown out on the railway track from a bio-toilet fitted in trains. In these bio-toilets, which are fitted below the coach floor underneath the lavatories, the human waste is collected from toilet and is acted upon by a colony of anaerobic bacteria that convert human waste mainly into water and bio-gases (mainly Methane CH4 & Carbon Dioxide CO2). The gases escape into the atmosphere and wastewater is discharged after disinfection onto the track. Human excreta thus do not fall on the railway tracks.

This Press Release is based on the information given by the Minister of State for Railways Shri Rajen Gohain in a written reply to a question in Rajya Sabha on 2 December 2016 (Friday).

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