The PAUL membrane filter can filter out particles as small as 0.04 microns.
The PAUL water filter uses a membrane through which the water must pass to filter out microorganisms, bacteria and even some viruses. Since viruses can be very small and they are the real challenge. Rotavirus, for example, gets caught in the membrane, while hepatitis A is so small, it can’t be filtered out.
With PAUL, around 1,200 litres can be turned into clean water every day. The filter is connected between a rainwater catchment tank located at a higher level and a drinking water tank located lower down, so that the water has to flow through it.
Another way to turn rainwater into drinking water is through UV rays – or rather UV-C rays – which are also used for disinfection in laboratories and businesses.
UV light reduces microorganisms, bacteria and viruses. How effectively depends on the exposure time of the light to the water, the turbidity of the water and the light intensity. The water flows through a tube or container where it is irradiated with this special light.
This light emits a wavelength of about 200 – 300 nanometres and attacks the DNA of the pathogens. In contrast to filtration, pathogen size does not play such a large role here. The UV light is most effective combating bacteria, followed by microorganisms and viruses.
Powered by solar cells, the UV water purifier can purify 2,500 litres of water per hour.
The hygiene education games of WaSH United
But that’s not all: water tanks and water filters are not enough. Education is also necessary as anyone who doesn’t know how important it is to wash their hands after going to the toilet won’t use the handwashing facilities.
To achieve this, a sustainable change in behaviour must be brought about. That’s why hygiene workshops for students and teachers are vital. The teachers in particular are very important here – as multipliers – one of them alone reaches several hundred children.
We take the workshop concepts from WaSH United as our guideline. These are designed to have a lasting effect. Hygiene lessons are taught in a playful way so that the children can better remember what they have learned.
The game “Knock down the germs“, for example, is based on “throwing cans”. For this, the children are divided into teams. Then the cans, labelled with a disease like cholera or typhoid, are stacked on top of each other. Whoever knocks down the most cans wins.
Our vision for clean water and sanitation
Our goal: Never have to fetch water again!
One of our goals with WaSH projects is to provide children with access to clean water and drinking water and hygiene and sanitation skills.
This helps to counteract diseases, by improving the hygiene situation at elementary schools. It enables girls to spend more time at school and thus improves children’s educational opportunities and their chances of having a stronger, better future.
Our vision for the year 2023: clean water for 50,000 children!
If you would like to help us reach our goal, please support us with a donation!
Learn more about our WaSH projects on our website.
Written by Steffi Eisenlauer