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  2. Water softening - Wikipedia

    en.wikipedia.org/wiki/Water_softening

    The presence of certain metal ions like calcium and magnesium, principally as bicarbonates, chlorides, and sulfates, in water causes a variety of problems. [1] Hard water leads to the buildup of limescale, which can foul plumbing, and promote galvanic corrosion. [2] In industrial scale water softening plants, the effluent flow from the re ...

  3. Pythagorean cup - Wikipedia

    en.wikipedia.org/wiki/Pythagorean_cup

    The fabric softener tray in a top-load washing machine operates by utilizing a Pythagorean siphon to distribute fabric softener diluted with water across the clothing in the washing machine. Before starting the washing machine, the user pours fabric softener below the maximum fabric softener line in the loading tray.

  4. Sanitary sewer overflow - Wikipedia

    en.wikipedia.org/wiki/Sanitary_sewer_overflow

    The U.S. Environmental Protection Agency (EPA) estimates that at least 23,000 to 75,000 SSO events occur in the United States each year. [1] EPA estimated that upgrading every municipal treatment and collection system to reduce the frequency of overflow events to no more than once every five years would cost about $88 billion as of 2004. [2]

  5. Backwashing (water treatment) - Wikipedia

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

    Spent backwash water is either discharged without treatment to a sanitary sewer system or is treated and recycled within the plant. [4]: 22.37–22.40 Historically, backwash water was discharged directly to surface water supplies; however, direct discharge is now highly regulated through NPDES discharge permits and is often discouraged. Used ...

  6. Clarifier - Wikipedia

    en.wikipedia.org/wiki/Clarifier

    This can cause the resuspension of particles by gases and the release of dissolved nutrients throughout the water fluid, reducing the effectiveness of the clarifier. Major health issues and problems can also occur further down the track of the water purification system, or the health of the fish found downstream of the clarifier may be hindered.

  7. Oroville Dam crisis - Wikipedia

    en.wikipedia.org/wiki/Oroville_Dam_crisis

    Water flowing into Oroville Dam's main spillway (bottom) and overflowing into the emergency spillway (top), February 11, 2017. As the lake level rose, measures were taken to prepare the emergency spillway for use. On February 10, 2017, workers began clear-cutting trees on the hillside below the emergency spillway. [22]

  8. Concrete degradation - Wikipedia

    en.wikipedia.org/wiki/Concrete_degradation

    3) and water to also form gypsum while releasing CO 2 back to the atmosphere: H 2 SO 4 + CaCO 3 + H 2 O → CaSO 4 · 2H 2 O + CO 2. The dihydrated gypsum is relatively soluble in water (~ 1 – 2 g/L) at room temperature and thus mobile. It can easily be leached by infiltration water and can form efflorescences on the concrete surface while ...

  9. File:Overflowing water drain Werrington March 2022.webm

    en.wikipedia.org/wiki/File:Overflowing_water...

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