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2. Water filter - Wikipedia

   en.wikipedia.org/wiki/Water_filter

   A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools .

3. Water purification - Wikipedia

   en.wikipedia.org/wiki/Water_purification

   Water purification. Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for human consumption ( drinking water ), but water purification may also be carried out ...

4. Slow sand filter - Wikipedia

   en.wikipedia.org/wiki/Slow_sand_filter

   Slow sand filter. Slow sand filters are used in water purification for treating raw water to produce a potable product. They are typically 1–2 m (3.3–6.6 ft) deep, can be rectangular or cylindrical in cross section and are used primarily to treat surface water. The length and breadth of the tanks are determined by the flow rate desired for ...

5. Mila hands-on: Much smarter (and pricier) than your average ...

   www.engadget.com/mila-smart-air-purifier-hands...

   When purchasing the device, you can choose one of seven pre-configured filters to use with it. The default is the Basic Breather, which is designed for larger rooms like your main living area.

6. The best air purifier for 2024 - Engadget

   www.engadget.com/best-air-purifier-120040002.html

   The Core 400S claims a half-hour air exchange rate for a 1,000-square-foot room and combines the three main filter types — pre-filter, activated carbon and particle — into a single ring ...

7. Startup aims to make filtered water an app-driven ...

   techcrunch.com/2019/10/01/startup-aims-to-make...

   One startup in Europe, Mitte, thinks it has the answer: filtering water direct from the tap. It has raised $10.6 million in a seed round. But it hasn’t started manufacturing yet. A new U.S ...