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Drum Digester

TakaNguvu - Waste to Energy
TN1 - Oil-Drum Digester TakaNguvu 1 is an implementation of the Oil Drum Digester described by E. G. Matthews in Biogas for Overseas Volunteers.


Project Rationale

  • Show a method of producing renewable energy and biofertilizer through waste management of manure produced at a farm.
  • At Baobab Trust TakaNguvu 1 is imbedded in the environment of organic sustainable farming methods to avoid soil erosion and other farming related environmental issues.
  • Transparent technology to show the functioning of bio digestion

In December 2003 the first oil drum digester of TakaNguvu 1 was filled with bacteria and slurry and went into production of biogas and biofertilizer.



       Map Shamba Mtopanga

Shamba Mtopanga
Bamburi North Quarry, Mombasa, Kenya

Hosted by     Baobab Trust, Mombasa


The oil drum digester is a good digester system for demonstration purposes as it is possible to look inside the digester and to see what is going on and to understand the principle of a biogas digester.

Our experience with the oil drum digesters:

  • To digest the manure of 1 cow 3 oil drum digesters are needed.
  • The gas yield per digester:
    In a 24-hour period the average gas volume produced was 76 litres (0.076 m3).
    With this amount of gas a low pressure cooker could be operated for about 17 minutes.
  • The lifespan of the digester is rather short: after 1 year of operation the drums (mixture holder as well as gasholder) had to be replaced due to rusting.
    We replaced them with plastic drums, the mixture holder as well as the gasholder
    The climate at the Coast might have negatively influenced the lifespan.
  • The handling (filling of mixture and releasing of fertilizer) is time consuming and not very user-friendly.
  • There are more suitable types of biogas digesters therefore we do not recommend the use of oil drum digester type:
    ->  Polyethylene Biogas Digester
    ->  Puxin Biogas Digester


2002 - 2013 TakaNguvu is a product of JuaNguvu Ltd.

last update: 24/10/2013
Biogas is a renewable Energy-Ressource, Biofertilizer Nguvu Taka Mombasa Mombassa NTV