Anyone remembers David Mayer de Rothschild’s Plastiki, “a 60 feet (18 m) catamaran made out of 12,500 reclaimed plastic bottles and other recycled PET plastic and waste products” that successfully conquered the Pacific Ocean last year?
Well, it seems this young man from Lamu (Kenya) had a similar idea and is in the process of building his own plastic bottle boat. Our reader Arthur Buliva from Kenya just sent us these pictures with the following explanation:
I was in Lamu recently and came across this man who was making a boat out of plastic bottles and old slippers. He was not yet finished with it yet but I took the few photos of the product that I could.
He says that he collects plastic water bottles that the tourists throw on the beach. He also wakes up early in the morning to collect bottles washed ashore from the sea. With these he has constructed the (in his own words, “first in its kind”) boat.
He water-proofs it by sealing the gaps with used slippers collected in the very same way. Then boils tar in order to glue the components all together.
Kenya believe it? 🙂
(all images kindly shared by Arthur Buliva under a CC-SA licence – thx!)
On the outskirts of Maroua, the capital of the Extreme North of Cameroon, is a place quite unlike any other in the country. Here a community of les forgerons—blacksmiths, or metalworkers—practice their craft in the relative cool of a tree grove. Several dozen men with specialized skills are gathered here for a single purpose: to transform piles of scrap iron into finely finished tools, stoves, replacement parts and other useful implements for sale to the local population. Young apprentices learn the craft while operating bellows or shaping wood for tool handles. The production here is performed entirely by hand and on a scale which must be seen to be fully appreciated. ….
Yesterday I met a lady who takes the bark from a certain type of tree, pulps it and makes paper. This paper is then sold as a specialty gift paper to tourists and others. It’s an example of Malagasy entrepreneurship, where the whole family is part of, and all supported by, this business. The manufacturing takes place in their backyard, the retail sales from their front porch.
In a rather laborious process, they first pulp the bark, then lay it out on a big sheet and submerge it in water. It’s then taken out after it has settled evenly and is decorated while still wet with flowers. Once dried, they can create everything from cards to boxes. The cards and more elaborate items sell for around $1 each, which nets a healthy profit from the original cost of the bark, which is a couple dollars per kilo.
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.
Cost (US$ )
Time to install (days)
1,500 – 2000
2,000 – 3,500
Flexi bag envelope
10 – 15 years
Fuelwood or LPG cylinders
200 (per year)
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
I thought skylink was an airline… Biogas operated planes???
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.
I got this photograph from someone who had his teeth repaired in Gikomba – the center of Kenya’s Juakali innovation, and another one of Kenya’s slums . The home made gadget looks pretty terrifying but check out the results!
Made from brass and modelled on something much more professional, this manual tooth mould (I’m sure there’s a technical name for this gadget) is cheap and brings smiles back to faces.
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