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  2. Water purification - Wikipedia

    en.wikipedia.org/wiki/Water_purification

    Fresh water can have widely ranging pH values depending on the geology of the drainage basin or aquifer and the influence of contaminant inputs . If the water is acidic (lower than 7), lime, soda ash, or sodium hydroxide can be added to raise the pH during water purification processes. Lime addition increases the calcium ion concentration, thus ...

  3. 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.

  4. Snowden-Gray House - Wikipedia

    en.wikipedia.org/wiki/Snowden-Gray_House

    Historical marker ()The Snowden-Gray mansion is located on East Town Street in Downtown Columbus, close to Topiary Park. [1] The surrounding Town-Franklin neighborhood is considered the city's first suburb, first subdivided in the 1840s, with early fashionable residences constructed in the 1850s, and its lots filling in during the subsequent prosperous decades. [2]

  5. Battelle Memorial Institute - Wikipedia

    en.wikipedia.org/wiki/Battelle_Memorial_Institute

    US$ 6.2 billion [1] Number of employees. 3,200. Website. www.battelle.org. Headquarters in Columbus. Battelle Memorial Institute (or simply Battelle) is a private nonprofit applied science and technology development company headquartered in Columbus, Ohio. The institute opened in 1929 but traces its origins to the 1923 will of Ohio ...

  6. Watershed Distillery - Wikipedia

    en.wikipedia.org/wiki/Watershed_Distillery

    Watershed Distillery. Watershed Distillery is a microdistillery in Columbus, Ohio founded in 2010 by business partners Greg Lehman and Dave Rigo. The distillery was the second distillery opened in Central Ohio after prohibition, and Watershed brought to market the first legally distilled bourbon whiskey in Central Ohio post-prohibition in 2012 ...

  7. Water treatment - Wikipedia

    en.wikipedia.org/wiki/Water_treatment

    Dalecarlia Water Treatment Plant, Washington, D.C. Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking, industrial water supply, irrigation, river flow maintenance, water recreation or many other uses, including being safely returned to the environment.

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