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  2. Backwashing (water treatment) - Wikipedia

    en.wikipedia.org/wiki/Backwashing_(water_treatment)

    Backwashing is a form of preventive maintenance so that the filter media can be reused. In water treatment plants, backwashing can be an automated process that is run by local programmable logic controllers (PLCs). The backwash cycle is triggered after a set time interval, when the filter effluent turbidity is greater than a treatment guideline ...

  3. Swimming pool sanitation - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool_sanitation

    Other filter media that have been introduced to the residential swimming pool market since 1970 include sand particles and paper type cartridge filters of 50 to 150 square feet (4.6 to 13.9 m 2) filter area arranged in a tightly packed 12" diameter x 24" long (300 mm x 600 mm) accordion-like circular cartridge. These units can be 'daisy-chained ...

  4. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions. Soft water also extends the lifetime of plumbing by reducing or eliminating scale build-up in pipes and fittings.

  5. Nanotechnology for water purification - Wikipedia

    en.wikipedia.org/wiki/Nanotechnology_for_water...

    Nanotechnology is the process of manipulating atoms on a nanoscale. [1] In nanotechnology, nanomembranes are used with the purpose of softening the water and removal of contaminants such as physical, biological and chemical contaminants. There are variety of techniques in nanotechnology which uses nanoparticles for providing safe drinking water ...

  6. Trickling filter - Wikipedia

    en.wikipedia.org/wiki/Trickling_filter

    Trickling filter. A trickling filter is a type of wastewater treatment system. It consists of a fixed bed of rocks, coke, gravel, slag, polyurethane foam, sphagnum peat moss, ceramic, or plastic media over which sewage or other wastewater flows downward and causes a layer of microbial slime (biofilm) to grow, covering the bed of media.

  7. Belt filter - Wikipedia

    en.wikipedia.org/wiki/Belt_filter

    A belt filter in a wastewater treatment plant. The belt filter is mainly used for dewatering [2] of sludge and slurry and juice extraction from apples, pears and other fruits, as well as grapes for winemaking, etc. Belt filters are used both municipally and industrially in a range of areas including urban sewage and wastewater treatment, metallurgy and mining, steel plants, coal plants ...

  8. Garden hose - Wikipedia

    en.wikipedia.org/wiki/Garden_hose

    A coiled garden hose. A garden hose, hosepipe, or simply hose is a flexible tube used to convey water. There are a number of common attachments available for the end of the hose, such as sprayers and sprinklers (which are used to concentrate water at one point or to spread it over a large area). Hoses are usually attached to a hose spigot or tap.

  9. Use filters to sort and organize messages in AOL Mail

    help.aol.com/articles/use-filters-to-sort-and...

    1. Click the Settings icon | select More Settings. 2. Click Filters. 3. Click Add new filters. 4. Enter the filter name, set the filter rules, and choose or create a folder for the emails.

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