farming – AfriGadget

Poop piki piki for my biogas system

Piki piki means motorbike in Kiswahili

This gadget was created to solve a real problem with biogas – getting the dung to the system quickly and efficiently. Motorbikes are the taxi’s of Africa so why not? Before I tell you about the above gadget I just want to remind you about the problems we have been having to solve to get the biogas to work at home.

Installing biogas at home has a real experience in afrigadget – we have figured out by trial and error how to get the gas under pressure –

At first we tried using water pressure, but when we stepped back and looked at it we realized that it really wasn’t simple or appropriate for bush applications ..

In fact, all we needed to do was to put pressure on the bags.

The pressure wasn’t enough to run the stove until we modified the stove jets by enlarging them slightly.

Next we had to figure out how to get the dung to my digester – you see I don’t own cows but my neighbors who live a few kilometers away do and are selling it at a very nice rate of Ksh 50 (70 US cents) for two large buckets . The owners are happy to see the dung as it accumulates in the nighttime stockades and attracts annoying flies that carry diseases if left on the land.

The problem I face is common to many folks around here, we rent houses but we don’t have livestock. But there are huge cattle farms around us. So Dominic came up with a solution that creates jobs and moves poop quickly and efficiently.

So we went to the local juakali welder on the roadside to create a dungmobile ..a trailer designed specially for cow dung!

We tested it with a human load to ensure it is balanced … each bucket weighs about 50 kg.

And the first delivery arrived without a problem! 🙂 Big Thanks to Dominic Wanjihia who seems to always have a simple solution to any problem.

I know you are wondering, if it’s that easy, then why doesn’t everyone use biogas?

Now that I’ve got biogas running my kitchen I wonder why so few people have done so in Kenya. There are countless articles, publications, websites and people who will tell you that biogas is the most economical and environmentally sustainable way to produce energy. In fact, the benefits of Biogas have been known for tens of years, and hundreds of systems have been built in Kenya. But it hasn’t really taken off – few of the installed systems are actually working and the uptake of biogas systems at a domestic level has been slower than slow – it’s virtually non-existent. A review of biogas in Kenya reports that technical breakdowns has discouraged uptake but the main limiting factor is cost.

Here’s a simple comparison of costs – from continuing using charcoal/fuelwood or Kerosene and LPG to using various biogas options.

Options	Cost (US$ )	Time to install (days)	Labour	Maintenance	Durability
Fixed dome	1,500 – 2000	21	5 people	Low	Decades
Floating top	2,000 – 3,500	21	5 people	Low	Decades
Flexi bag envelope	400	1	1 person	Low	10 – 15 years
Fuelwood or LPG cylinders	200 (per year)	0	0	low	Decades

For a simpleton like me these figures are immediately revealing – it takes 2 years to pay off a flexibag digester after which domestic fuel is free for at least the next 10 – 13 years. For the underground systems you have got to be hugely rich, or suffering from environmental guilt to make the decision to switch to biogas – from an economic perspective it will take 10 to 20 years to pay back. You could grow your own trees and make your own charcoal in that time frame….

Why is it so expensive for the constructed biogas systems? Because most of the biogas systems in use are constructed systems requiring engineering and masonry, they are very expensive, take weeks to install, require experts, and intensive follow up. If they go wrong it’s a major engineering task to fix it. This is why we are promoting the flexible bag option for domestic and small industry use.

Congratulations to Skylink Award winning Kenyan biogas innovators

We would ;like to congratulate Skylink Innovations who have just won a the Ashden 2010 Award for their biogas installations in Kenya.

Ashden Award 2010 — Skylink recieve the Ashden Award from Sir Richard Attenborough

I thought skylink was an airline… Biogas operated planes???

Underground biogas digester for human waste at Meru Prison — Human waste digester under construction in Meru Prison

Their industrial scale system costs Ksh 1.6 million (US$ 19,753). Such installations may need to be financed by the Government institutions where they clearly make enormous economic and environmental sense for schools, prisons and other large institutions.

For small scale house hold units, we need solutions that will compete against the cost of installing LPG or using charcoal, firewood or kerosene stoves. When we talked to local Maasai near Nairobi they found the flexi bag systems appealing because they could be purchased with the sale of just 2 or 3 cows, can be rolled up and moved when they migrate, and it saves the women the work of searching for firewood, it’s hygenic because water can be heated for bathing children, while it also removes dangerous piles of rotting cow dung near the homesteads which are breeding sites for biting and disease carrying flies which affect livestock and people.

AfriGadget Innovator Series: A profile of Frederick Msiska

Peasant farmers are not the first group that come to mind when thinking about innovation but Mr. Frederick Msiska of Nchenachena in the Henga Valley of Northern Malawi is an innovator and in more than just one way. Mr. Msiska, who only attended school until the 5th grade, is a peasant farmer who also happens to be an inveterate inventor and a tinkerer. Among his many creations, he has designed and built a biogas converter for his toilet that he uses to produce electricity. He has also built a cell phone charger of his own design, a fan for his home, both of which use the electricity that he produces as well as a chemical sprayer for use on his farm.

Mr. Frederick Msiska

Of his inventions and what it took to make it so, he says “I looked around and I found that certain things were missing in my life so I studied very closely things that the government supplies. I made them myself through trial and error. I just kept trying, trying, and trying until they eventually worked.”

On the wall of the office of Frederick Msiska: a to-do list of things he plans to do -

'Zinchito Mu 2008' (Work in 2008)
- Kuzenga office (Build office)
- Kupanga Luso ( Make things with my skills)
- Kupanga Sipuleya (Make a sprayer)
- Kupanga fani (Make a fan)
- Kupanga magetsi (Make electricity)
- Bio-gas light

Frederick is also a “lead farmer” – a designation local government gives to thought leaders in agriculture in an area who give advice and direction on best farming practice and techniques. He is also known around his area as the “Doctor of crops” due to his farming expertise and adoption of every sustainable farming techniques he comes across.

Frederick on his farm / at his macademia tree nursery and with his self-made chemical sprayer

Mzamose Gondwe, who runs the blog African Science Heroes spoke to Mr Msisaki and was distraught to learn that he has taken apart his biogas toilet due to (unwarranted) fears about imprisionment after word came out to him about the travails of another rural inventor, Gabriel Kondesi. Gabriel who has invented a radio station using an old cassette player, Nokia cellphone, some electrical components and antennae. What he did not know was that the root reason behind this particular arrest was the running of a radio station without appropriate licensing, an ovresite that the licensing body, the Malawi Communication Regulatory Authority (MACRA) later fixed when the recognized Gabriel’s ingenuity and awarded him a license.

Mr. Msisaki is the picture of humility: when asked about his inventions and achievements, he presents the view that “… farmers do not contribute to national development, it is only those who are educated who contribute to development.” He story and achievements however are truly the epitome of what we profile here at AfriGadget with the focus that we have on the appropriate application of ingenious African technology in every day problem solving.

via African Science Heroes: Communicating science, the African way and Self Help Africa.

Recycling – tyres, motorbike wheels and water pumps

What do you get if you cross tractor tyres, motorbike wheels and a water pump? Well, in Africa you could get anything! Here’s an odd combination of things related to water – recycled tractor tyres cut to make water troughs

This contribution is thanks to Bankelele (the very cool Kenyan blogger) who responded to a recent post on tractor tyres with the comment “I found a similar one last week and e-mailed it to hash, but perhaps the pics should be added to this post as its the same use of tractor tyre for livestock water”. He spotted it in Feb 2010 during funeral at a homestead in kapsowar, Kenya (note to Banks – Thanks for this, and next time send me low res pics dude!)

water pump engine used for a grinder — well it works doesn't it?

Here’s another water related gadget – a water pump turned into a grinder – and why not? This was spotted and photographed in Gikomba in Nairobi Kenya by Dominic Wanjihia.

A modified wheel barrow that makes so much more sense – motorbike tyres and check out the puncture proofing on the wheel below

This was spotted on the Limuru road works near Nairobi Kenya. Have you seen anything interesting that you’d like to contribute to Afrigadget? Don’t be shy! Send it to us – we’d love to get contributions from across the continent.

Tractor tyres and bush buckets in Masailand

I have just spent a week in the field studying Masailand ecology and community conservation with Princeton University students. The location is not that remote (Kitengela and Olerai within 40 km of Nairobi) and the community are wonderfully resourceful when it comes to day to day tools for pastoralism.

Masai salt lick made from tyres in Kenya

Tractor tyre trough for water for goats and sheep

This old tractor or truck tyre was somehow cut, opened up and sealed at either end to make a perfectly good livestock watering trough. Even Joy Adamson noted that the Masai question using modern appliances if home made ones do the job anyway.

salt lick2small

Tractor tyre cattle salt lick

Another way to make a salt lick, Evelyn just cut a truck tyre in half and placed it on the ground supported by stumps.

traditional bucket small

home made bucket works perfectly

Why buy a bucket when you can just make one with an old water container and a piece of metal?

manure spadesmall

Home made shovel

And if you don’t have a shovel for your manure, just straighten out some corrugated iron, cut it and nail to a stick and Presto – probably more effective than anything you could buy in Nairobi. Manure is one of the few products sold to passing trucks on these remote ranches.

beads small

Keeping land open for wildlife migrations in and out of Nairobi National Park can be costly to those living with wildlife. Those in The Wildilfe Foundations land lease scheme earn 4$ per acre per year to keep the properties open (no fences) and to supplement their income they make beautiful beaded artworks for sale on Olerai Conservancy.

Maasai ladies making beaded works of art Kenya

It might look like a tough life for some of us, but the Masai out here seem perfectly satisfied and at peace

Modified farm implements in Kenya

In Baringo one farmer has come up with two rather interesting innovations.

Murray Roberts is in the business of planting restoring grasslands which involves planting grass seeds in severely degraded landscapes.

The primary purpose of ploughing is to turn over the upper layer of the soil, bringing fresh nutrients to the surface, while burying weeds and the remains of previous crops, allowing them to break down. It also aerates the soil, and allows it to hold moisture better.

A traditional plough comprises a series of blades all facing the same direction.

Murray Roberts Modified Plough

Murray Roberts has modified his plough so that it has two blades facing each other. These create a hill and furrow effect which is perfect for grass seeding to improve the trapping rainwater in this semi arid part of Kenya. Normally the rainwater hits the surface and sheets off the ground carrying away the valuable top soil and seeds!

But that’s not all. Ever tried to make a fence using barbed wire – you know how tangled it can get? Well not if you use one of Murray Roberts fencing gizmo, it’s basically a tool onto which you thread the barbed wire so that when you go out into the field to fence a plot, you can release the wire in an untangled manner and under tension. Simple and obvious and you don’t need a wire tightening tool.

barbed wire fencing gadget

That’s William Kimosop and Princeton University Undergraduates checking it out – don’t ask me what that dog is up to!