Narayan Deotao Pandharipande
The NADEP method of organic composting uses a wide range of organic materials such as crop residues, weeds, forest litter and kitchen waste with an end-product of a fertilizer that serves as a good alternative to farmyard manure.
The NADEP Composting method of organic composting was developed by a Narayan Deotao Pandharipande of Maharashtra. This compost uses a wide range of organic materials such as crop residues, weeds, forest litter and kitchen waste with an end-product of a fertilizer that serves as a good alternative to farmyard manure. The composting tank construction is a rectangular brick tank with a 90-120 day decomposition time.
Originally used in India, can be used worldwide
This method is free, requires a brick tank which price can vary depending on location.
Vermicomposting, rotary drum composting, and other organic composting methods.
Goal 6: Clean water and sanitation
Constructed using locally available materials
Users can use the open source design documents and implement the NADEP composting method.
How much organic waste/how often added
Volume out compared to volume in
Time to decompose
Amount of nutrients recovered at the end of processing
Additional disinfection or other processes needed
The recommended size of the tank is 10 ft length by 5 ft width by 3 ft height. All the four walls of the NADEP tank have 6 inch vents (created by removing every alternate brick after the height of 1ft. from bottom for aeration), and the tank may be constructed with mud mortar or cement. For good quality compost, the entire tank should be filled within 24 hours and not beyond 48 hours. Initial materials include agricultural waste (Dry & green): 1350-1400 kgs, cattle dung or biogas slurry: 98 – 100 kgs, fine-sieved soil: 1675 kgs, water: 1350-1400 liters.
These materials are added in layers:
- Sub-layer-1: 4 to 6 inch thick layer of fine sticks, stems, followed by 4 to 6 inch layer of dry and green biomass.
- Sub-layer-2: 4 kgs cow dung is mixed with 100 liters of water and sprinkled thoroughly on the agricultural waste.
- Sub-layer-3: 60 kgs of fine dry soil is spread uniformly over the soaked biomass.
- Fill approximately 10 -12 layers using this method, and cover with 3 inches of thick layer of soil and seal with cow dung and mud plaster. Cover the tank with a thatched roof.
After 15-30 days add 2-3 additional layers, and moisten every 6-15 days. Decomposition time is 90-120 days.
There is no technical support provided and users are expected to maintain the product on their own.
Reduced cash expenses on chemical fertilizer, improved soil fertility, and increased crop yield
S.V.P. University and S. K. Rajasthan Agricultural University
Implementers must take appropriate precautions when working with organic waste, particularly cattle dung, and ensure complete decomposition.
Kumar, S., at al., 2011, A Study on Design and Development of NADEP Compost Tank. Society, for Recent Development in Agriculture, 11, pp. 207-209.
Kumawat, N., et al., 2018, Preparation of NADEP Compost for Sustaining Farming Community. Popular Kheti. Vol 5.
Kumar, A., et al., 2012, Recycling of Harmful Weeds Through NADEP Composting. VEGETOS: International Journal of Plant Research, 25, pp. 315-318.
Verma, R., et al., 2014, Carbon and Weight Loss During Composting of Wheat Straw by Different Methods. Annals of Biology, 30, pp. 354-357.
Nutrient retention, decomposition of different organic materials, and carbon loss were all assessed in evaluations.
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