Bio Toilet


  • Shree Ram Raja Wood Packers (SRRWP) has been one of the original TOT Holders from  the  Defence Research Development  Organisation (DRDO).
  • The ownership and control of SRRWP was taken over by the present Management and the enterprise was re-christened Amritasa Bio Technology (ABT).
  • The promoter group includes individuals who were directly involved with the DRDO right from the installation of first bio-digester of India in Lakshadweep
  • ABT (formerly SRRWP) is engaged  in   the manufacturing of Bio Toilets and Bio Tanks in various  configurations
  • In a short span of time it has developed an impressive record of executing several orders from various Government Departments as well as Corporates under their CSR efforts
  • Extensive experience in executing orders for the Indian Railways  and Defence sector
  • Regular technical and management support from officials of DRDO in R&D as well as business operations

Sanitation deprival: a pressing issue

Key Insights

  • 1/7th of the world’ population does not have access to a toilet
  • 60% of the above sanitation deprived people reside in India
  • Annually 2.4 million Indian children die of diarrhea caused by open defecation
  • Only 11% of the Indian rural families dispose child excretion safely
  • 80% of children’s solid excretion is left in the open or thrown into the garbage
  • Over 75% of our country’s population has access to Mobile Phones but basic Sanitation remains a distant dream!
  • Untreated human waste causes contamination of food, fruits and vegetables beside causing widespread organic pollution of water bodies as well as diseases such as viral gastroenteritis, typhoid, cholera, jaundice, diarrhea
  • Indian Railways spends INR 350 Crores annually on rectifying rail corrosion caused due to human waste on tracks
  • Government of India spends INR 12 billion on rectifying ailments resulting from improper sanitation

Bio digesters- a panacea to the menace

Solution overview

  • Bio –digesters solve the problem of human  waste disposal in  an environmentally friendly manner
  • Bio digesters use a Specially developed 4 stage bacteria that act on the waste to convert it in to water and gas(methane)
  • Extracted water can be drained out as a non-hazardous effluent and the methane gas can be used as a fuel.

Product  advantage

  • Ecological way of digesting organic solids
  • Prevents contamination of groundwater
  • Alternative to dumping of wastes in rural and semi rural areas that lacks adequate sewage systems
  • By-products such as water can be used to water plants
  • Alleviates the effort involved in relocating composting toilets every year


  • No bad smell in toilets from the tanks
  • Fecal matter in the tank not visible
  • No bugs infestation
  • No clogging of digester
  • Effluent is free from off odor and solid waste
  • Reduction in pathogens by 99%
  • Reduction in organic matter by 90%
  • No maintenance required
  • No requirement of adding bacteria/ enzyme
  • No need of removal of solid waste
  • Hygienic and Non –Polluting
  • No manual scavenging required (sludge free disposal)
  • Relatively low cost
  • Can do with low water requirement
  • Suitable for all terrains
  • Useful by products: Bio gas (Methane and water itself)


Criteria Unit Septic


Biodigester Bio Digester with Reed bed
pH 6.7-7.5 7.0-7.2 7.0-7.5
Turbidity NTU 500-800 70-90 2.5
Total Suspended Solids Mg/L 150-300 90-120 50-80
TDS Mg/L 500-850 350-450 100-300
Vs Mg/100ml 50-60 20-30 5-12
COD Mg/L 1200-2000 250-300 15-25
BOD Mg/L 350-500 70-120 2-4
Coli forms MPN/ml >3000 300-350 0-12


Septic Tanks (Aerobic biodegradation) Bio digesters (Anaerobic biodegradation)
 Forced aeration/agitation is essential which is energy   intensive No aeration is required
 Incomplete aeration (partial aerobic condition) leads to foul smell Complete anaerobic conditions
Not effective in pathogen inactivation >99% Pathogens inactivation
Can’t tolerate detergents/phenyl Anaerobes can even degrade etergents/phenyl
 Generates large amount of sludge Sludge generation is very less
Repeated addition of bacteria/enzyme is required for the process One time bacterial inoculation is enough
Maintenance & recurring cost is high Minimal maintenance & no recurring cost
Time taken for operationalization : 1year Time taken for operationalization :1-2months

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