Solving the flexible biogas digester problems

You’d think that given the amount of cow dung available around rural Africa that biogas would be a big hit right? Well, its actually relatively unknown. The main reason is materials, coast and complicated technology. People in these areas use charcoal or wood for their domestic cooking needs – its not only dirty hard work to collect firewood, but it’s unhealthy and damages the environment. But, it’s free …

We believe that  biogas from cow dung holds huge promise for rural and urban areas as a cheap source of energy that can be turned into domestic use or even business anywhere in rural Kenya….eg. pasturizing milk, making yoghurt, running fridges, generators, hammer mills for grinding corn, cooking, baking, heating water, running machines… and reducing your carbon footprint.

I have recently become the latest guinea pig for Dominic Wanjihias experiments … and it has been quite a learning experience

Problem No. 1.The system needs to be cheap and mobile for communities who don’t own land or who move regularly (pastoralists)

Simply Logic flexi -bag for biogas - small, cheap and made of parts you can find in any hardware
Biogas system on a motorbike in Kenya
You may need a Dominic to help set it up
It can be dirty work - but don't let that discourage you...

After only 2 weeks it will have ballooned like this

After only 2 weeks the bag will have inflated with methane - beautiful biogas
Great party trick: The biogas will burn and amaze

Problem No. 2. The pressure is not enough to light a stove. Nothing ever works as you initially planned that’s why having a fundi like Dominic around to modify, adapt and rethink as you go along helps so much.

To create pressure Dominic got two tanks, and did some juakali pipe connections. One tank was placed above the other. The lower tank was filled with water. Long pipes and short pipes were put through the lids and specially made holes in the tanks …  It’s all about applying simple physics really…

You need a few tools - all available at tusky's or Nakumatt

Then using a pump ..(we’ll be using a modified bicycle pump next time) he was able to move the gas from the flexi bag to the lower tank and displace water to the upper tank. This water creates enough back pressure to get the stove to light.. that’s the theory … here is what happened.

A curious boda boda rider (motorbike taxi) called Victor volunteered to help… Rhoda watched in awe

Victor pumped... others set up the stove

“Houston we have a problem” …Ok, accidents are bound to happen…pressure pushed the pipe off  and Victor got soaked..just water though. The top tank fills with water as you pump biogas into the bottom tank, and the water drains back to the bottom tank as the gas is used

Course all this hard work was not for nothing – we had to make a cup of tea –

It took 15 minutes for the water to boil!

Yes we are very very proud that the system worked so Cheers! a well deserved cup of tea.

We estimate that it took about 1/4 to 1/2 of the gas in one blue tank to boil the kettle – that’s about 1/8th of a cubic meter – and the entire flexi bag contains about 5 cubic meters… which means we have about 10 hours of gas use…..and the stuff is being produced all the time (we had quite some wastage as we fooled around to get the system to work)

Well it all seemed to be going just fine when …pssssssttttt

Houston, we have another problem...we sprung a leak!

Nothing serious but we were losing a bit of gas through one of the lids (holes had been drilled through the  lids to insert pipes) …we  need to fix that before we build up any pressure in that tank.

If you are interested in biogas let us know! Leave a comment.

Boys toys in Mathare Valley Slum Nairobi

Amid the squalor in one of Kenya’s most depressing slums, there is a surprising amount of flashy colour and fun

Njuguna makes these toys because he like to! His clients are local people in the slum but he does sell well outside of that market too.

I was especially enthralled by this scrap metal motorbike but the price was Ksh 2,500 (US$ 30) which may have been a special price for visitors like me – I couldn’t afford it!

Scrap metal gocart – boys in heaven!

Njuguna also makes beautiful micro toys for a specialist corporate market – they had been sold but he had photos

You guessed it – client was Safaricom!

Amongst all the toys were some other serious gadgets that Njuguna had put together for no specific reason -a couple of free standing windmills rotate rapidly in the narrow streets that channel the wind. They stand there like artistic monuments, but Njuguna told me that he made these constructions made from parts taken from broken cars and had put them out and was waiting for an idea to strike him regarding what to apply them to. He called it his research experiment. …  somewhere else lay another of his inventions, a waterpump  …..(should I have suggested something?)

Kids play by open sewer in Mathare Valley

Visiting Kibera was disturbing in so many ways

,

….and yet it was thoroughly invigorating and inspiring – a pleasant surprise . If you ever get a chance, do visit and seek out the Njuguna’s tucked away in narrow streets. These brilliant artists and innovators might live in what seems like the worst hell on earth, yet somehow it feels like they choose to.

Dreams can come true – Janes miraculous Mitumba story

If your dream was to become a doctor and you ended up uneducated and living in a slum, would you just give up on life? Some of us might have, but not Jane Ngoiri. Jane dreamed of being a surgeon, but she was too poor to finish school or go to college. However, today Jane is a Mitumba queen from Nairobi’s Mathare Valley slum. Mitumba is the business of selling second hand clothing that arrives in Kenya from European and American regions in massive bales.

Mitumba trader in Mathare Valley

Mitumba originally referred to used clothing but today it includes everything from clothes to shoes, bags and even kitchen utensils. Huge markets have sprouted in Nairobi where the traders buy selected items when bales are first opened, and sell them in nicely arranged stalls elsewhere. It’s easy to see how mitumba provides hundreds of jobs for the juakali but everyone is doing it and the competition is intense so prices and profits are low.  Jane came up with a clever way of getting past this by finding a unique niche. Unlike most Mitumba operators who simply sell second hand clothing, Jane adds value by taking the clothes apart and re-making clothing that Kenyans want for their children, especially daughters.

Her specialty is girls dresses, frilly, lacy dresses for special occasions, and Sunday bests. You would never find this kind of thing in Mitumba – western kids don’t wear this kind of thing.  Jane buys used wedding dresses for Ksh 500 (USD 7) and from each one she can create three girls dresses and sell each for Ksh 1,500 (USD 21).

It takes her only 45 minutes to sew each one and she can make and sell up to 40 per month making a tidy profit which has literally allowed her to climb out of poverty.

Janes may not be the slumb dog millionaire but her story of escaping a slum life is humbling. I went to see Jane at home – she now owns her very own two bedroom orange and green house in a new housing development just outside of the city. She has running water, sitting room, a huge kitchen with gas stove, an inside flush toilet and solar lighting.

I visited her former home I n the slum,  It’s hard to imagine how anyone could live in a room six foot by five, with just one bed. The mud floor was covered with a plastic mat but the water in the saturated ground seeped through.

Outside might have been disgusting, but inside the the corrugated iron room was but super neat and carefully arranged. On the bed sat the new tenant, 34 year old Catherine with her two daughters Cynthia (17) and Samantha (3). Her 12 year old son was out. To her right was someone else’s room , and to the left a changaa den (changaa is an illegal distilled alcoholic brew). Behind her were three other rooms.

The room measured about 6 x 6 feet – a prison cell! It was slimy and muddy everywhere, the evil sewage and rotting vegetable smells and the ugly structures were not nearly as invasive as the, noise. It seemed like everyone in Mathare was competing to make the loudest noise, – every room had a radio on full blast as well as the changaa brewing and drinking dens which nearly outnumber homes.  Drunkards (all men) filled the street, and pestered us every few minutes, the community just ignored them as they stumbled down the hill. Children, some without shoes ran around and played in the mud, open sewers and picked through rubbish. After seeing where Jane has come from I can totally understand why she can’t stop smiling.

Her three children are no longer surrounded by filth and noise, changaa dens and drunkards. They play out doors safely, are clean and neat, and they go to school near home. This family eats well as they grow their own vegetables in a garden kitchen. And Jane is no longer just one of the million slum dwellers in Mathare, here in Kaputei, she is a respected member of a budding community.

Janes life story is nothing short of miraculous.   Like everyone else in Mathare, she lived in the slum because she had no other option. When her husband took a second wife so many years ago, she walked out on him and headed for the city, four children in tow, including a baby. She thought she’d be able to get a job, but like many uneducated women her only means of survival in one of Nairobi’s toughest slums, was to use her body. That’s how she survived for many years, doing what she called “dirty business” living from hand to mouth in the filthy, noisy, congested squalor of Mathare Valley, with all her children crammed in one room.

Jane is the poster child of microcredit success, it got her out of poverty and she says it saves her life. She got training and a loan from Jamibora, one of the largest micro credit banks in Kenya. Once she’d paid that back she got another loan, and then a third. This made her eligible for membership in a housing scheme, but first she had to rise 10% of the value of the house, Ksh35,000 ($450).  With her earlier loans she had bought a manual sewing machine, using that she made dresses and beaded jewelry for an international market.  It sounds easy but she says it was very hard to raise the money. There were hurdles along the way and at times she almost gave up her dream.  Perhaps the toughest was the election crisis struck in early 2008 when looters raided the slums and took everything she owned. Without a sewing machine she had lost her means of making a living.

So Jamibora gave her an emergency loan which enabled her to get back on her feet straight away.  Sitting in her proud two bedroomed house in Kaputei Jane glows, it’s hard to disbelieve her story. But there’s more. She wouldn’t let me go until I’d heard the whole story. After getting back her life the first time, Jane decided to find out what her HIV status was. Not surprising, it was positive. Despite this she was in good health, but again she asked God to help – she needs to live long enough to pay off the 20 year loan. She promised to help other slum women by giving free lessons in sewing, after all she never paid for her own classes. So far Jane has taught three others including Catherine.

Are you inspired?  Here’s a question, can you guess why Jane painted her house orange and green?

Modified bicycles in Kenya – 100% Afrigadget!

My good friend Jagi Gakunju who runs the Kenyan environmental cyclists club Uvumbuzi club told me about this project which immediately caught my attention. It’s a collaboration with Africans and a Dutch organization.

You can read all about Cycling Blue in Kisumu on their Cycling Blue blog

modified bicycles Kenya Kisumu

The Cycling Blue Kenya workshop is providing courses, micro credit for (modified) bicycles and creating of employment, it is aimed to reduce poverty. In the workshop bicycles will be modified to create bicycle carts (for instance bicycle ambulances) for sale. Who buys them?  Garbage collectors, local entrepreneurs who want a (modified) bicycle to generate income such as the Cool coolbox, bicycles with extended carriers for transport of cabbages.

Here’s what they are cooking at the moment in Kisumu

bicycles, afrigadget

The idea that bicycles in Africa get modified and adapted for local uses is definitely 100% afrigadget.

Check out the brilliant Cycling out of poverty  website here for more photos and videos.  For more information Luuk Eickmans

Cycling out of poverty
info@cyclingoutofpoverty.com
http://www.cyclingoutofpoverty.com
0031-(0)615895529
SNS-bank 90.61.46.356

If you and your family want a great weekend out on bikes, join the Uvumbuzi cycling club here

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.

wheel barrow

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

wheelbarrow
Puncture proof!

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.