accra – Page 2 – AfriGadget

Cleaning massive amounts of water with chlorine

Cleaning massive amounts of water with chlorine from WhiteAfrican on Vimeo.

Suprio Das is part of the water-cleansing team with Killian Deku, Laura Stupin and Bernard Kiwia. Besides the ball-valve doser, they’ve also created a siphon mechanism chlorine filter. It, like all of the IDDS work, uses locally available materials.

This particular project attaches to a hand pump and can cleanse unlimited amounts of water. Best of all, it has no moving parts, so it is less likely to break or wear down over time. It works by dripping chlorine into the water when a certain water level is reached. Then, the water comes pouring out in batches.

Ball Valve Chlorine Doser

With one 5 liter bag of chlorine, and a device that costs $3 to build, you can clean 100,000 liters of water.

Here at Maker Faire Africa is Killian Deku, a Ghanaian working in the IDDS program, has created a ball valve chlorine doser with the help of his team mates from India, the US and Tanzania. Their only real costs were the ball valve and the time taken to create the bamboo structure that holds it. The one variable cost is the bag of chlorine used to cleanse the water.

Ball Valve Chlorine Water Cleanser from WhiteAfrican on Vimeo.

A plastic waste recycling press

We’ve got a lot of plastic trash all over Africa, especially in the cities. A team from IDDS (Amit Gandhi from the US, and Mark Driordan from the UK) decided to create a way to add value to waste plastic by using a low-cost process to transform it into something useful: plastic sheets. From these sheets can be made a number of other products. On display they had shoes, bags, pencil cases and folders.

The sheets can be made from 3ply to 40ply in thickness, and the cost of assembly is minimal.

Turning waste plastic into plastic sheets from WhiteAfrican on Vimeo.

A pedal powered hacksaw for the disabled

Bernard Kiwia is from Arusha, Tanzania. He’s here at Maker Faire Africa as part of the IDDS group that has been building innovative devices for the last couple weeks in Kumasi, Ghana. Today he’s showing his device that he created from an old bicycle and some welded rods. It’s powered by someone sitting in a chair.

Pedal-Powered Hacksaw in Ghana from WhiteAfrican on Vimeo.

It cost Bernard about $45 to create the bicycle powered hacksaw and one day to fabricate.

Bernard’s been a bicycle mechanic for 3 years, and has been teaching students in Tanzania to fix them for the last couple. He was invited to IDDS and met a Guatemalan attendee that had some very interesting designs using bicycles. After seeing those, he realized that he could make similar tools and devices for the needs of people in Arusha.

(more pictures from Maker Faire Africa on Flickr)

Since that time, Bernard has created a windmill, cell phone charger, drill press and a pump – all working off of bicycle parts and mechanisms.

His bicycle powered water pump. It sits by the side of the road for kids to jump on and pedal:

A chair made from bicycle parts:

MFA: Water bag design challenge!

Amy Smith (of MIT’s IDDS) somehow got a hold of a mic and madhouse has now ensued! Everyone has been split up by their birth month into groups. They are given 5 water bags (sachets) and told to solve the world’s greatest problems. 30 minutes later we get…

January: The Sachet Kebab
Decreasing litter and polution. People can collect water sachets off the ground easily with a pole and spiked end. It can be placed along the roads, and a lot of trash can just be spiked on the tip of it.

February: Hydro Electric
Generate electricity by using the bags to create small turbines.

March: Light absorbent and heat absorbent bags
They also had a crazy idea of drinking the water, peeing in the bag and selling that to farmers for fertilizer… to much laughter…

April: Potting and a Wallet
Drink the water and make it empty. Cut the top off and put in soil and grow small plants. Take another bag and put a small hole in it for drip irrigation. Second idea: use the bag to put your money in for when it rains.

May: The individual water-shower packet and a purse
Hang the water and put a small hole in it. Create a purse out of it to hold a camera or mobile phone.

June: Waterbelt, glasses strings
They’ve created some really interesting spectacle (glasses) holder. Also, a waterbelt to hold the water as you’re moving around.

July: Water purifier
Uses the light from the sun to help purify the water. It takes a bottle top cut off and used as a funnel as well. It’s shaped like a train, for marketing reasons.

August: Kids toys
Make small airplanes and hats for children and an hourglass made from 2 water bags.

September: Drip irrigation and a pillow
Puncture a bottle or a bag on top to collect water, then use for drip irrigation. Also fill multiple old empty bags with air and put them inside a pillow case to create a pillow.

October: Drip irrigation
Starts with a bag, then a tube made of old empty bags that can direct the water further and over more areas.

November: Water resistant mobile phone case
“Your phone case is not water resistant, ours is. Clap for us.”
“We have created a water wallet, not just a plastic money carrier.”

December: Water sachet lighting system and a sachet wrist watch band
Put full bags on your roof that diffuses the light and warms the water.