Indian Railways Develops Hybrid Vacuum Toilets

Indian Railways Develops Hybrid Vacuum Toilets, Railway has come up with a design that combines the advantages of Vacuum toilets and those of Biotoilets to create a new design of “Hybrid Vacuum Toilet”. A prototype has been made by modifying the standard flushing protocol of a vacuum toilet so as to create water seal and additional post flush cycles and this concept has been converted into a working prototype by Indian Railways as a first ever system of its kind to have been developed and built by any railway system in the world. This newly developed toilet has been fitted in one coach No. 153002/C FAC that is running in Dibrugarh Rajdhani for trail.

Hybrid Vacuum Toilets:

• The prototype consists of a custom designed Vacuum toilet adapted from a commercially available vacuum toilet that is used in aircrafts which evacuates its discharge into a biodigester tank which is now successfully proven in the biotoilets of Indian Railways. 
• The biodigester tank is fitted underneath the coach and contains anaerobic bacteria that converts human fecal matter into water and small amount of gases before discharging the same on the ground/track.
  Typically, a conventional toilet or Biotoilet uses 10 – 15 liters of water per flush whereas the vacuum toilet consumes only appx. 500 ml of water for flushing.
  By transferring the discharge of the vacuum toilets into biodigester, the need to create separate ground handling installation and creating additional sewer load on the Municipal Corporation will be done away with.