I personally think that biogas would be a big step in the fuel market but the bigger names in the field seem to hold what could be a turning point in their market. I think that they are seeing it as a real threat, talking about bio fuel. But I would also like to point out that 15% or 20% part bio would not make that much of a difference. Because you still consume fuel with the transport, production and manufacturing of that bio gas. And unless you get something that would harness or extract bio components with the use of less fuel, there will be holes in this interesting point.

@Elder, it depends on what quantity of gas you want to produce. Based on that you can purchase ready ones or opt to build your own which may be more expensive but give you more output

so many sources of raw material...

coffee processing wastewater
dairy wastewater
slaughterhouse wastewater
distillery stillage
nut processing wastewater
pineapples processing wastewater
sisal decortications wastewater
rice hay
etc
etc

http://www.gtz.de/de/dok...as-assessment-kenya.pdf

@elder.
I dont know of a supplier of plastic digester but you can easily make yours by using plastic water tanks. Its sinkers and the tank size will determine the amount of gas held.

I went to Nairobi International Trade Fair and observed how one company was producing biogas.

http://www.biogas.co.ke/

I was impressed but the pricing was over the roof; for such a simple solution that could empower rural communities. So l decided so source for materials l observed and test one myself. Canvas, bronze rods, silicon, piping everything using materials available in Gikosh will cost you 12k. As opposed to the offer price of 50k + VAT at the showground! mine is working fine upcountry and not once has any of my "mothers" gone to fetch firewood. I actually claimed back the gas cylinders as they had no more use!

theres one in kibera that runs on human effluent and waste water.....anyone with knowhow how this works?

1. You get canvas and take it to a fundi, and make a gunia with two compartments for the desired size that you wish to have.

2. At the sewn external corners of your canvas sack, you apply silicon to make the sack airtight, except for the inlet through which you could supply cow dung from time to time. Alternatively, you can locate it near the cowshed so that as the cowshed is washed, the dung flows directly into the entry of the sack.

3. To fortify the sack, you install and compress bronze rods around the edges.

4. Then on the second compartment, you make an exit into a pipe to the kitchen. Here also you make the joint airtight using silicon.

5. You then modify your gas cooker slightly to accept low pressure gas coming in by tightening the gas nozzles.

6. You then get from a slaughterhouse semi-processed cowdung, from the ruminant stomach. this is pretty efficient for bio gas supply.

7. 48 hours later, you have gas flowing. You can connect this to many homes in the homestead. However, the farther the cooker is from the canvas the lower the gas pressure and the slower the cooking, but it still works well.

Dont know if l have helped .... Wishing to clarify anything that isnt clear.

There was a feature on this on K24 last night. The consultants were saying the total cost would be a minimum of 100k and that you can use human waste. They were also generating elec from it.

Great topic in these days of rationing and high fuel prices. Been researching on this topic for some time and all i have seen so far are biogas digesters that require substantial space. I went to one country (via internet) that has space problems coz of the population-India and was able to see their innovative model that can be installed even on the roof of your house. Just watch the video here

http://www.youtube.com/watch?v=BGSl72xZHNk

Hope this helps.

Nice one. keep updating