Human waste disposal in innocuous form is an ever growing problem leading to aesthetic nuisance, threat of organic pollution & several infectious diseases in epidemic proportions due to contamination of ground water and drinking water resources in highly populated and developing countries, like India. Less than 30% of Indians have access to the toilets. In rural areas about 10% of houses have toilets and rest of the people go to open defecation. Population in the cities although have better access to the toilets but only to the tune of ~70%. Untreated waste is responsible for several diseases like, dysentery, diarrhoea, amoebiasis, viral hepatitis, cholera, typhoid etc. taking the life of lakhs of children annually.

                 Aerobic biodegradation                                                                          Anaerobic biodegradation

                     (STP with Aeration)                                                              (STP in Modified Bio septic tank treatment)

 Forced aeration/ agitation is essential and is energy                                 No aeration is required
intensive.     
Incomplete aeration (partial aerobic condition) leads                        Complete anaerobic conditions
to foul smell
Not effective in pathogen inactivation                                               More than 99% Pathogens inactivation
 

 

 

Generates large amount of sludge                                                      Sludge generation is very less
Repeated addition of bacteria/ enzyme is required                  One time bacterial inoculation is enough
for the process
Maintenance & recurring cost is high                                          Minimal maintenance & no recurring cost