Wild About Africa

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The shittiest job

This is a photo journey about shit and gas. Yes, I’m it’s about my new biogas installation

Stage 1. Get a truck load of shit and two shit shovellers. Have the load delivered and shoveled out at your house

Cost of a truck load of very fresh cow dung Ksh 800. Cost of transport Ksh 1000, cost of shit shovellers Ksh 250 for half a day of really smelly work!

2. Get someone who knows what they are doing to set up your new flexible bag biogas digester

3. Get a bucket and a stick. Add shit and water 1:1 and then stir to the consistency of lumpy porrige

Somehow I felt offended associating this work with my breakfast

4. Pour the mix into the digester

Hold your nose, smile for the camera, pour the crap

5. Wait for gas to form

Full of crap

So what’s so great about this biogas digester?  It’s small, mobile (you have to empty it before you move it), cheap (Costs Ksh 28000), no concrete involved, and its easy to install even if it’s a shitty job.

You simply can’t escape that. Every part of this system is locally and easily available.

How much gas will it produce?

You’ll have to watch this space to find out

What about other biogas systems?

The alternatives available in Kenya involve lots of concrete or huge rubber containers. Both are expensive and neither are mobile. Why do you need a mobile digester – well if you are renting a place, or if  you are a nomadic person like a Masai family.

What if you don’t have cow dung? Then use goat dung, or chicken poop, or even elephant dung. Anything will work. You can even use kitchen wastes but you have to liquidize them first (which might use more energy than the gas produced).

Do you want to order a biogas system?

This system costs 28,000 for the unit, labour for installation, and depending on your location and dung price – you need a pick up load of fresh dung to get it started, and a bucket of dung every other day.

Leave a comment and I’ll get back to you.


May 28, 2010 - Posted by | biogas |


  1. OK, WHAT DOES IT DO? You’ve got a rubber container full of poop and gas, I assume it’s methane? Or not? What’s the purpose of this device?

    Comment by nothoney | May 28, 2010 | Reply

    • Oh, you will soon see what I can do with all that methane – pump it directly to my water heater, to my kitchen for cooking… even lights can be run of methane!

      Comment by paulakahumbu | May 28, 2010 | Reply

  2. […] } I am hoping to have a very successful home biogas production system (which I wrote about here)  in about 2 weeks. But what should I feed into my system to make it really […]

    Pingback by Does kitchen waste produce as much biogas as fresh cow dung? « Wild About Africa | May 28, 2010 | Reply

  3. Excellent!

    How is it emptied afterwards?

    On another note: I see your bro is wearing a (Sikh) Kaddha. You know there are easier ways to open a bottle 🙂

    Comment by jke | May 31, 2010 | Reply

    • Thanks JKE, the system is self emptying ….at least that’s what he says. I have seen one in Masai Mara which burped (or is it farted) out the entire contents due to too much pressure (they didn’t expect so much gas in such a short time). Yes, I guess he wears it to open bottles – truth is he put it on as a teenager and now he can’t get the damn thing off.

      Comment by paulakahumbu | May 31, 2010 | Reply

      • Haha, also have one but mine is in the drawers.

        They are like piston rings and I bet someone in Industrial Area secretly manufactures them!

        Comment by jke | May 31, 2010

  4. EYE WITTNESS-This system really works.I bought the system through M-pesa after visiting a home in Transmara where i found Dominic stiring cow shit, and when he explained how it works,i decided to purchase. I installed it myself with my wife giving hand when i needed help and, after three weeks there was more gas than what our kitchen requires.
    Thank you for the easiest technology.

    Comment by Stephen Kamau | July 20, 2010 | Reply

    • Hi
      can somebody tell me where I can buy this type of balloon digester in Nairobi?
      Is the bag UV resistant? How long will it last?

      Comment by Ino | February 14, 2011 | Reply

  5. Great this is really looks easy I have to see one that is already installed.How to you empty and put in fresh dung

    Comment by Edwin Kidambu | August 31, 2010 | Reply

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