Researchers at the Eidgenössische Technische Hochschule Zürich (ETH Zürich) have developed a novel filter enabling quick, simple and cheap water filtration - reported ETH Zürich in July 2014.
The filter - called DrinkPure - can be screwed onto any plastic bottle. No additional pump or container is needed, making it very easy to handle. Dirty water that passes through the filter screwed onto a bottle can be drunk directly. The filter weighs less than 100 grams and thanks to the high flux up to a litre of water can be filtered per minute using one hand only. According to the scientists, the filtration obtained is cheaper and simpler than with most other filters known to date.
The DrinkPure filter operates in three-steps - a prefilter takes out larger particles such as plant parts or sand. The centre filter is made of activated carbon powder that chiefly retains chemi-cals, odours and heavy metals. The third, most important part of the filter is a polymer mem-brane that holds back bacteria.
The developers want to put the filter to large-scale use in the scope of development aid activities.