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2. Ultrafiltration - Wikipedia

   en.wikipedia.org/wiki/Ultrafiltration

   Drinking water treatment 300 m 3 /h using ultrafiltration in Grundmühle waterworks (Germany). Ultrafiltration can be used for the removal of particulates and macromolecules from raw water to produce potable water.

3. Trickling filter - Wikipedia

   en.wikipedia.org/wiki/Trickling_filter

   A trickling filter plant in the United Kingdom: The effluent from the primary settling tanks is sprayed onto a bed of coarse gravel (Benfleet Sewage Treatment Plant). A trickling filter is a type of wastewater treatment system.

4. Lava filter - Wikipedia

   en.wikipedia.org/wiki/Lava_filter

   Percolating water collected at the filter bottom contains odour components as well as sulfuric acid from the biological oxidation of hydrogen sulfide. Depending on the process design the collected water is recirculated or subjected to further treatment. Types of systems. At present: 2 types of systems are used;

5. Cloth filter - Wikipedia

   en.wikipedia.org/wiki/Cloth_filter

   The woman on the right is putting a sari filter onto a water-collecting pot (or kalash) to filter water for drinking. A cloth filter is a simple and cost-effective appropriate technology method for reducing the contamination of drinking water, developed for use mainly in Bangladesh. Water collected in this way has a greatly reduced pathogen ...

6. Nanofiltration - Wikipedia

   en.wikipedia.org/wiki/Nanofiltration

   NF units in drinking water purification range from extremely low salt rejection (<5% in 1001A membranes) to almost complete rejection (99% in 8040-TS80-TSA membranes.) Flow rates range from 25 to 60 m 3 /day for each unit, so commercial filtration requires multiple NF units in parallel to process large quantities of feed water. The pressures ...

7. Biosand filter - Wikipedia

   en.wikipedia.org/wiki/BioSand_Filter

   The system was developed from the slow sand filter, a technology that has been used for drinking water purification since the 1800s. [3] Initial lab and field tests were conducted in 1991; the system was patented in 1993 [ 4 ] and was implemented in the field in Nicaragua .