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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. Portable water purification - Wikipedia

   en.wikipedia.org/wiki/Portable_water_purification

   The Portable Aqua Unit for Lifesaving (short PAUL) is a portable ultrafiltration-based membrane water filter for humanitarian aid. It allows the decentralized supply of clean water in emergency and disaster situations for about 400 persons per unit per day. The filter is designed to function with neither chemicals nor energy nor trained personnel.

4. Ultrafiltration - Wikipedia

   en.wikipedia.org/wiki/Ultrafiltration

   Ultrafiltration. Ultrafiltration ( UF) is a variety of membrane filtration in which forces such as pressure or concentration gradients lead to a separation through a semipermeable membrane. Suspended solids and solutes of high molecular weight are retained in the so-called retentate, while water and low molecular weight solutes pass through the ...

5. The best deals to shop during Walmart's weekly sale ... - AOL

   www.aol.com/lifestyle/the-best-deals-to-shop...

   Carote Kitchen Knife Set, 12-Piece. $18 $73. Save $55 with coupon. We love the neutral colors of this eye-catching knife set, which includes an 8-inch chef's knife, an 8-inch bread knife, an 8 ...

6. The 64 best Black Friday deals you can still get today at ...

   www.engadget.com/the-64-best-black-friday-deals...

   Apple AirTags. Apple. Apple AirTag (4 Pack) $80 $125 Save $45. Save $20 on a four-pack of AirTags for Black Friday. $80 at Amazon. Explore More Buying Options. $80 at Walmart $100 at Verizon. A ...

7. Instacart rolls out reduced and free delivery option in ...

   techcrunch.com/2021/11/11/instacart-rolls-out...

   The company is also rolling out additional savings for its Express membership, which offers unlimited free deliveries on orders of at least $35, among other things, for $9.99 per month.