Sustainable OneWorld Technologies C.I.C. (SOWTech)
The Flexigester is an anaerobic digestion system used to produce both biogas and biofertilizer.
The Flexigester System is an anaerobic digestion system developed by Sustainable OneWorld Technologies C.I.C. (SOWTech), that can take materials such as animal manures, waste food, human waste and plants and convert them, over a period of several weeks, into natural Biofertiliser and Biogas. The system is delivered in a box, it is small and light, yet it has a capacity of 10 tonnes and above.
Africa. To date projects in Uganda, Sierra Leone, Malawi.
Goal 7: Ensure access to affordable, reliable, sustainable and modern energy for all.
Designed for small communities and farming groups. The system also has the advantage that it can be set up quickly for places such as refugee camps.
On a per demand basis by Butyl Products Ltd .
Butyl Products Ltd is the sole manufacturer.
Technical support provided on field.
The Flexigester is made from Butyl, which is a resilient and robust material, and which can be maintained with simple hand tools. Butyl products have been in use for periods well in excess of 10 years in tropical and subtropical.
Manufacturers specify a minimum retention time of 30 days, biofertiliser output up to 101 t/yr. An estimate of the value of biofertiliser and biogas output up to 8 m3/day, equivalent to up to 9-17 kg wood/day.
Kite International conducted a program called SimpliSafi in which Flexigesters were used. The project was supposed to be the world’s first simplified sewerage and biogas system – a community-centred sanitation and clean energy solution. During the three year couse of the project, the following impacts were observed:
- Construction of three simplified sewerage networks, providing sustainable sanitation to over 450 community members of the informal settlements in Dar Es Salaam.
- Development of an effective method to empower the local community, organising local Sanitation User Associations to manage each network.
- Installation of a Flexigester, adapting it to function as part of the world’s first integrated simplified sewerage and biogas network– including evidence of proof of concept with the successful production and testing of burnable gas in the community.
- Build and trial designs from the University of Cambridge that aimed to concentrate solar power to process the flexigester output to create biofertiliser and greywater, closing the loop and achieving zero waste sanitation.
There are some potential dangers to running the biogas plant: noise, hazardous waste material disposal, etc. Adequate ventilation, appropriate precautions, good work practices, and adequate personal protective equipment will minimize the dangers associated with biogas.
The Flexigester is available in a variety of sizes from 10 to 80 m3 allowing it to be used in a variety of different situations. Flexigester distributes another product, Flexigester Sewage Isolation Bag (SIB).
In context photographs (0)
You can use the form below to contribute a photo of this product.
In context files & documents (0)
Feedback from users, customers & distributors
Please let us know your experience in using this product through comments below.