Why Waste Treatment?


The Problem The Consequences The Solution
  • With increasing urbanisation, sewage waste disposal is an enormous problem in India and the developing world
  • Commonly used solutions such as septic tanks, soak pits, etc., do not treat the waste matter
  • Out of the 5,000 towns and cities in India, less than 300 have conventional sewerage systems and an even lower number have 100% coverage
  • Untreated waste results in:

    • Organic pollution
    • Aesthetic nuisance
    • Contamination of ground and drinking water
    • Diseases like cholera, typhoid, diarrhoea, etc.
    • Malnutrition
    • Stunted growth – permanent loss of height and intelligence
    • Economic loss in terms of direct health expenses and loss of man days
  • Waste treatment technology developed by Defence Research and Development Organisation (DRDO) known as Bio-Digester technology
  • K. K. Nag Pvt. Ltd is a licensee of DRDO’s Bio-Digester technology
  • We offer a range of Biodigester and Bio-STPs (Sewage Treatment Plants)
  • We provide integrated sanitation solutions comprising of Toilet Superstructures and Bio-Waste Treatment Systems

DRDO Bio-Digesters


Consist of two parts:
  • A specially designed and manufactured Bio-Digester Tank in rotomoulded LLDPE or fibreglass.

  • Anaerobic Microbial Inoculum (AMI) – the bacterial component.

NagMagic Bio-STP (Sewage Treatment Plant)


  • Two stage treatment process:

    • Anaerobic digestion using a Bio-Digester to treat the sewage. Effluent suitable for use in irrigation, gardening, civil construction, etc.

    • Optional secondary treatment which makes the effluent compliant with CPCB norms. Effluent suitable for flushing toilets, etc.

  • Low on investment. High on performance. Very low running cost

  • Minimal maintenance with only one-time addition of inoculum

  • All sewage/organic matter is 100% bio-digested and gets converted into water, bio-gas and CO2

  • Ideal for individual households, apartments, commercial establishments, educational institutions, etc.

Performance Results of Bio-STP and Bio-Digester Systems


Sr. No. Parameter CPCB/MPCB* Standards For NagMagic Results Range
Inland Surface Water Public Sewers Land for Irrigation Marine Coastal Areas Bio-Digester Effluent Bio-STP Effluent
1 Suspended Solids mg/l (max) 100 600 200 100 100-150** 30-50
2 pH Value 5.5 - 9.0 5.5 - 9.0 5.5 -9.0 5.5- 9.0 6.5 - 7.5 6.5 - 7.5
3 Biochemical Oxygen Demand [3 days at 27 degrees Celsius] mg/l (max) 30 350 100 100 80-100 20-30
4 Chemical Oxygen Demand mg/l (max) 250 - 250 250 180-200 40-50
5 Fecal Coliform Count (CFU/100 ml) 1000 - - - 250-300 50-100
* CPCB: Central Pollution Control Board, MPCB: Maharashtra Pollution Control Board
** Inorganic Suspended Solids are a function of the input quality of water

Rotationally Moulded Bio-Digester Tank Capacity Chart


Sr. No. Bio-Digester Tank Size (litres) No. of Users in Domestic Setting No. of Users in Industrial Setting Bio-Digester Tank Dimensions AMI Required (litres)
Dia (mm) Height (mm)
1 700 4 to 6 8 to 12 1,100 1,015 200
2 1,000 6 to 10 12 to 20 1,100 1,385 300
3 1,500 10 to 20 20 to 40 1,210 1,670 450
4 2,000 20 to 30 40 to 60 1,425 1,600 600
5 2,400 30 to 35 60 to 70 Two 700 litre tanks combined with one 1,000 litre tank 700
6 3,000 35 to 45 70 to 90 1,680 1,665 900
7 3,500 45 to 55 90 to 110 Two 1,000 litre tanks combined with one 1,500 litre tank 1,000
8 5,000 55 to 80 110 to 160 Two 1,500 litre tanks combined with one 2,000 litre tank 1,500
9 7,000 80 to 120 160 to 240 Two 2,000 litre tanks combined with one 3,000 litre tank 2,100

Fiberglass Reinforced Plastic (FRP) Bio-Digester Tank Capacity Chart


Sr. No. Bio-Digester Tank Size (litres) Bio-Digester Tank
Dimensions (cms)
No. of Users in Domestic Setting No. of Users in Industrial Setting AMI Required (litres)
1 700 litres 83 x 83 x 100 4 to 6 8 to 12 200
2 1,000 litres 100 x 100 x 100 6 to 10 12 to 20 300
3 1,200 litres 120 x 100 x 100 11 to 14 15 to 30 360
4 1,500 litres 150 x 100 x 100 10 to 20 20 to 40 450
5 2,000 litres 150 x 150 x 100 20 to 30 40 to 60 600
6 3,000 litres 200 x 150 x 100 30 to 35 60 to 70 900
7 4,000 litres 200 x 200 x 100 35 to 45 70 to 90 1,200
8 5,000 litres 220 x 200 x 120 45 to 55 90 to 110 1,500
9 6,000 litres 300 x 200 x 100 55 to 80 110 to 160 1,800
10 7,000 litres 350 x 200 x 100 80 to 120 160 to 240 2,100
11 8,000 litres 400 x 200 x 100 120 to 140 240 to 280 2,400
12 10,000 litres 450 x 200 x 120 140 to 180 280 to 320 2,700
13 15,000 litres 600 x 220 x 120 200 to 250 360 to 500 4,500
  • The monthly average running/operating cost of a 5 KLD (kilolitres per day) conventional STP is Rs. 5.70 – Rs. 6.30 per litre

  • The monthly average running/operating cost of a 5 KLD NagMagic Bio-STP is Rs. 0.55 – Rs. 0.65 per litre

  • The tanks for the Bio-STP systems are available in both rotational moulding and FRP

  • The smallest system available can be used by 4 to 6 users in a domestic setting and 8 to 12 users in an industrial setting

  • Theoretically, there is no upper limit for the number of users for a Bio-Digester tank

Testing Facilities – Full Fledged Micro-Biology Lab


  • Autoclave (Sterilizer)

  • Data Logger on Bacteria Generation Plant (BGP)

  • Gas Chromatography

  • Gassing Manifold

  • Incubator

  • Laminar Hood

  • Muffle Furnace

  • pH Meter


Autoclave (Sterilizer)

Bacteria Generation Plant

Gas Chromatography

Gassing Manifold

Key Customer Segments


  • Corporates – CSR activities and for own use

  • Export Customers – NGOs, Corporates, etc.

  • Government and Semi-Government Institutions

  • NGOs, Civil Society Organisations

  • Retail

For more information please visit http://biodigester.in/

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