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Bio-Digester technology has been developed for resolving the problems of undecomposed human waste.
About Bio-Digester
  Special Features
  Anaerobic microbial inoculum   Specially designed tank for efficient biodegradation
  Cold tolerant microbial consortium   Suitable for mobile and stationary platforms
  Required one time inoculum charging   Permits use of toilet cleansing agents
  Immobilization matrix for retaining higher microbial mass for survival in   adverse conditions.   Tailor made in respect to number of users, materials, situation and      condition.
  Wide applicability   Minimizes water consumption
  Maintenance free   Customized & easily adoptable
  Effluent water recyclable   Organic waste Reduction: > 99%
  Pathogen reduction: > 99%   Environment-friendly & cost-effective
  Suitable for any geo-climatic condition  
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.
DRDO has perfected an eco-friendly biodegradation technology for human waste disposal for armed forces deployed at high altitude locations and glaciers. The sub-zero temperature does not allow the natural biodegradation of organic matter leading to accumulation of the human waste over the years, contaminating the ice which is the only source of drinking water and poses a great health risk. Further, melted ice contaminates the rivers and other water sources and ultimately spreading the contamination downstream. DRDO developed Biodigester technology is environmental friendly, maintenance free and efficient without depending on conventional energy sources. The effluent is odorless and gets rid-off most of the pathogens.
Hundreds of such biodigesters have been installed at various locations in J&K, Sikkim and Arunachal Pradesh. The biodigester technology has two components: anaerobic microbial consortium and specially designed fermentation tank. The microbial consortium has been made by acclimatization, enrichment and bioaugmentation with the coldactive bacteria collected from Antarctica and low temperature areas. It is composed of four clusters of bacteria belonging to hydrolytic, acidogenic, acetogenic and methenogenic groups with high efficiency of biodegradation.Fermentation tank is made of metal/ FRP and has the provision of immobilizing the bacteria in large numbers.
Subsequently, the technology has been extended to Indian Railways for on-board treatment of human waste. Hundreds of stainless steel made biodigesters are in operation in different trains of IR. Under a Memorandum of Understanding (MoU) with Railways, it is planned to install these biodigesters in all trains in the years to come.Lakshadweep administration has ordered 12000 biodigesters for all houses of its ten islands. Low cost single house biodigesters have been designed for rural sector of the country which is long-lasting, require little space, generate environment-friendly safe effluent and does not require any maintenance. Recently developed version of this technology has been named as 'BioTank' that is the excellent low cost alternative of the conventional septic tanks being currently used by individual houses and communities.
i) Isolated, screened,
selected & enriched
acclimatization and
ii) Can withstand freezing and thawing
iii) Ability to inactivate the intestinal pathogens
i) Material: Metal/FRP of
  cylindrical shape
ii) Works at low temperature as well as high temperature
i) Material:
  Metal/FRP of
  cylindrical shape
ii) Provided with insulation and heating arrangement       with solar system
i) Material:Stainless Steel

ii) Sludge settling device     and chlorination
iii) Work during long journeys in different temperature
i) Material: FRP/MS

ii) Suitable for   existing/independent toilet


iii) Also available with top     mounted toilets
iv) Can be installed for single house/apartment/society/ community
i) Material: FRP

ii) Design involves
    longer path for
iii) Suitable for high water usages and areas
with high water table



 Low cost, simple design for onsite construction
 Material: Brick / RCC structure/ FRP
 REED BED SYSTEM (optional) improves effluent quality & can also be used to treat
  kitchen and  bathroom wastewater
 Final effluent safe and can be used for recycling or irrigation
 Can be installed for single house/ apartment/society /community
Mr. S. Bundela (Additional Director)
Directorate of Industry Interface & Technology Management (DI2TM)
Rajaji Marg, New Delhi 110 105.
Mr. Vivek Raghav (Joint Director)
Directorate of Industry Interface & Technology Management (DI2TM)
Rajaji Marg, New Delhi 110 105
Mr. Nirankar Saxena (Programme Director) Ms. Swati Sahai (Bio-Digester Technology Manager)
Assistant Secretary General,
Federation House
Tansen Marg
New Delhi 110001
Deputy Director,
Phone: 011-23487238
Mobile: +91-9818183720
Mr. Rubaab Sood (Programme Manager)  
Additional Director,
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