Rotary e-club supports:

SOLVATTEN

2, 5 million lives to save.

2 billion live without access to safe drinking water and electricity in or near the home. These people live outside the infrastructure network and therefore use coal and firewood.

The inventor

PETRA WADSTRÖM

The Swedish innovator Petra Wadström’s “solar water can” makes it possible to collect, store and also clean drinking water from microorganisms. This is done with the help of solar energy, ie without the need for electricity.

Solvatten – That’s how it works!

the solar water can for the user

Let us assume that you are in rural India and not sure if you can drink the water from the shallow well. Do as follows: Fill the solar water bottle with water. It is made of plastic and holds 10 liters of water. Fold up the can and put it in the sun. After 3-5 hours, the water is purified from microorganisms and maintains a temperature of about 55 ° C. The indicator on the can now shows “green old man” instead of “red old man”. Now you can let the water cool and then drink it. The risk of diarrhea and other microbial diseases from the water is now very low

Solvatten-container – technology

The contaminated water is poured into a two-part plastic container. In a first step, the water is purified from particles and larger organisms with the help of a filter. The container is folded up towards the sun like a book and one side of the container consists of transparent plastic. The microorganisms are exposed to the energy-rich UV radiation, which prevents their growth. At the same time, the UV radiation is converted to long-wave heat radiation, which results in the temperature in the can rising. The water also begins to circulate, which means that the microorganisms are exposed to the UV radiation to an even greater extent. The effect is thus that the microorganisms are exposed to both UV light and elevated temperature. They do not like that combination and the result is that the bacteria are neutralized. This takes place within three to five hours and at 55 ° C

The need controls the adaptation

Solar water can be scaled up and down according to different needs. For example, it is conceivable that the water purifier can be used in connection with natural disasters or during expeditions to inaccessible places without access to clean drinking water or electricity.
Solar water has been shown in tests to work in most places in the world. Even at an altitude of 3,000 meters in Nepal, the process in the can provided clean water within 4-5 hours, even though the weather was rainy and cold with low UV light. The innovation meets the WHO standard for “safe water”, ie <1 E-coli bacterium / 100 ml water. The water purifying ability has, among other things, been verified by IVL Swedish Environmental Institute. The invention was awarded in 2008 with the prestigious Creation Prize and scholarship from the City of Stockholm and Lions.

Solar water causes a ripple effect

positive side effects

Reduced tree felling
Reduced wood demand = reduced tree felling – less erosion, more shade and oxygen. (A solar water bottle reduces the need to cut down trees by 6-8 trees per year.)

Time
Long walks to fetch water can be replaced with other chores, often for women.

Reduced spread of infection
Diseases spread by contaminated water are reduced. For example, eye infections in young children.

Hot water

Provides better hygiene! Solar water is used in maternity clinics and eye clinics where, thanks to clean water, it has been possible to reduce the risk of infection because it is easier to wash clean with warm water!

Safe water for a family up to 7-10 years

Improved health for 5-6 people

Reduces household costs with 50% ($ 670)

Reduced wood burning
with about 74 trees

Saves 3-4 hours / day / family

Purifies more than 42,000 liters of water

We are not alone!

others that support solar water

Axfood
Greencarrier
Folkpool
Rikstvätt
HH Majestät Drottning Silvias stiftelse
Apoteket
Returpack
HSB
Kairos FUTURE
Löfbergs
Plan International
WWF
UNICEF