Bio-Toilet

A toilet in which biological degradation of human waste by inoculates takes place is known as Bio-Toilet. 

Inoculums digests the human waste converting it into water & gases in the process.  

• The name of the bio-toilet bacteria type is Anaerobic Bacteria.

Steps  in anaerobic digestion:-

1. Large polymers are converted into simpler monomers called hydrolysis 
2. Simple monomers are converted into volatile fatty acids called acidogenesis 
3. Volatile fatty acids are converted into acetic acid CO2 & H2 called acetogenesis 
4. Acetate & H2 are converted into CH4 & CO2 called methanogenesis

Indian Railways is using the bio-toilet concept of the DRDO in which 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.