Upper Hutt College
Page 1- page 2 - Certificates
Expert feedback from John la Roche, water engineer and ex-director of Water for Survival.
1. Courtney and Dayna. Click here for details of their whole project.
Feedback on the sanitising liquid from Elaine Burgess, plant scientist:
Good use of a cheap available fruit and by incorporating the peel which contains lemon oil increases the antiseptic and antibacterial. White vinegar also has antibacterial properties but the acidity of this mix could cause skin irritations and sensitivities especially to the eyes so I would suggest using it in a diluted form. Overall, well researched.
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2. Nicolette, Aleece and Megan. Click here for details of their whole project.
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3. Bree, Gemma and Nicole. Here is their poster, hand sanitiser device and game.
Feedback on the sanitising liquid from Elaine Burgess, plant scientist:
Well thought out to use aloe vera as it is a natural gel healing and reported to be antibacterial and fungal but it may be difficult to obtain a supply of aloe for the quantity required. Alcohol is antiseptic so would work well as a mixing agent.
All of those essential oils would enhance the mix, however tea tree oil would also maximise the antibacterial properties. Good to include the safety precautions.
4. Tyler and Michael's Water Stuff
5. Codie and Joshua's poster, device, device views and their Suds and Drainpipes board game.
1. Effectiveness: It's a great idea that is well presented. However, the design needs some sort of tap to shut the water off rather than a plug. I like the idea of a foot pump but you have to think about how the bucket works. Instead of using a plug, perhaps you could lower the bucket to a level below the level of the outlet, which would avoid contaminating the plug with dirty hands? You might need a larger catchment area than a bucket to collect the water and some sort of reservoir to keep the water.
Durability: It should be reasonably durable. The foot pump might wear out in a while.
User-friendliness: The design is easy to follow.
Communication: This has been done well with excellent ideas. The amamas hamamas wara jingle is great - particularly with the use of pidgin!
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2. Effectiveness: What a good idea! You have covered all the bases. To step on the pedal for a short period where the rubber band gets to work is such an excellent idea. The second container is also an excellent idea. You have thought of a lot of ideas! The addition of soap makes the hand washing more effective too.
Durability: Providing the containers and fittings are made of durable materials that have been put together solidly in the study wooden frame, the device should last.
User-friendliness: The design looks easy to use.
Communication: The card game is excellent. I particularly like the question - What are you washing off your hands? That question could be the basis of of a whole set of activities. The simple but clever poster says it all. Full marks for an exceedingly well done project.
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3. Effectiveness: It's a good idea to hang this device from a tree and use a sturdy bottle to dispense had sanitiser. The only thing I don't understand is how you are going to measure a small amount of hand sanitiser coming out because I can't see exactly how it dispenses the liquid. I suggest you use a foot pump as the others have done because hands can contaminate the device.
Durability: A durable container should stand up to the rain, sunlight and wind and hard treatment from the students.
User-friendliness: I need to know a little more more about how the design works.
Communication: The puzzle is absolutely super. It is a good way for the students to learn about germs on their hands and and about using hand sanitiser. It's great! The poster is fine apart from the white hands...
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4. Effectiveness: I like the large tarpaulin to collect water and the 20 litre storage container. Using a foot pedal to get both soap and water is a good idea and using bamboo tubes is a good idea for what could be available locally. My only concern would be how the corks open the pipe to allow the water and soap solution to flow. How do the corks close once the foot is taken off the pedal? Perhaps there is a rubber band to pull the corks back? This might be a bit tricky to operate in practice. Having soaped the hands it would be nice to each the soap off with just water.
Durability: Your design should be durable and easy to replace or repair in a developing country. Tarpaulins and bamboo tubes should be readily available as as should be suitable containers.
Communication: Your message about how to wash hands properly is important. I assume you would you put this on a notice beside your device. Well done.
5. Effectiveness: What a good idea to have a filter to clean the water from an existing roof, possibly the toilet roof itself. Remember to clean the filter periodically. And what a good idea to use a rope to tilt the water container to get a small supply of water to wash the hands.
I was uncertain in the diagrams how the rope pulls onto the container and what the pan shaped device between the rope and container is designed to do. Could you please explain? The container would need to be fixed at one end so it returned to the "no flow" position when the foot is taken off the pedal.
Durability:
Your device should be reasonably durable and you should be able to find suitable containers.
Communication: Your suds and drainpipes board game is very well thought out. If the children have fun playing this game they should remember the importance of messages about washing hands.
