Updated on August 28, 2019


Created on August 27, 2015

SimGas GesiShamba

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The GesiShamba is a modular fixed dome biogas system developed to use recycled waste from rural farms and households.

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Product Description

The GesiShamba is a modular fixed dome biogas system developed by SimGas for rural households. The system provides energy from recycled waste and produces a bio-fertilizer slurry for farms and gardens, the system can also be used for co-digestion of biodegradable materials.


Market Suggested Retail Price


Distributors / Implementing Organizations

SimGas and their partner Silafrica Tanzania Ltd.

Manufacturing/Building Method

Mass produced between SimGas's two production sites located in Tanzania and Kenya.

Intellectural Property Type

Patent Protected

User Provision Model

The GesiShamba can be purchased from SimGas and third-party vendors. The system is delivered and installed by the company's technicians. The company seeks retailers and provides information on how to partner with them.

Distributions to Date Status

The SimGas  Biogas Program with the Gold Standard expected to distribute 10,000 systems throught Kenya. The company expects to install 30,000 systems per year by 2020.  

Output energy product


Average daily biogas production (m3/day)


Description of waste source(s)

Human, animal, and organic waste

Waste input requirements (kg per hour or day)


Description of other input requirements


Other input requirements (amount per hour)


System dimensions (m)


Design Specifications

The fixed dome digestor modular with volumes ranging from 2 m3 to 20 m3. Weight begins at 20kg. For its construction high density polyethylene which represents a post-consumer plastic, is necesary to obtain injection- moulded components and extruded seals.

Technical Support

Provided by SimGas representatives through "after-sales service" and detailed user-training.

Replacement Components


2 year warranty. Lifespan of at least 20 years.

Manufacturer Specified Performance Parameters

Manufacturers specify that the GesiShamba is an easy transportable system (100 kg with nested parts), high production outcomes of about 40%, and excellent slurry (bio-fertilizer) production.

Vetted Performance Status

A case study developed by South and East Africa Energy and Environmental Partnership (EEP) identified that users save $636 USD per year on fuel costs per household, users can generate $408 USD per year per household, by using the bio slurry households experience up to a 200% increase in crop revenues, users can save about 1.5 hours per day when going from making a fire to switching on a biogas stove in a matter of seconds, a reduction on emissions by by 8.2 tonnes CO 2-eq per year per household can be achieved and the usage of the systems could prevent deforestation by reducing consumption of 7.42 ton wood/charcoal per year per household.


There are some dangers associated with biogas digesters: fire hazard, leaks and negative pressure, but since this is a small/ family size system the hazards are also lower.

Complementary Technical Systems


Academic Research and References

Vogeli, Y., Lohri, C.R., Gallardo, A., Diener, S., Zurbrugg, C., Anaerobic digestion of biowaste in developing countries: practical information and case studies. Laufenburg, Switzerland: Swiss Agency for Development and Cooperation SDC; 2014 [cited 20 Jul 2015].

Forbis-Stokes, A.A., Colon, J.J., Ouksel, L., Deshusses, M.A., Effective decentralized sewage sanitation with low CO2 footprint. Durhan (NC): Duke University; [cited 2015 Jul 20].

Buizer, M.S., The humanure carrousel, a biogas latrine sytem for Kenyan boarding schools [dissertation]. Delft University of Technology; 2014.

Compliance with regulations

Complies with all relevant UNFCC requirements for the Clean Development Mechanism.

Other Information

SimGas also offer other companion products like: stoves, commercial burners, and biogas rice cookers.

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