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Lime softening (also known as lime buttering, lime-soda treatment, or Clark's process) [1] is a type of water treatment used for water softening, which uses the addition of limewater (calcium hydroxide) to remove hardness (deposits of calcium and magnesium salts) by precipitation.
Lime softening is the process in which lime is added to hard water to make it softer. It has several advantages [ further explanation needed ] over the ion-exchange method but is mainly suited to commercial treatment applications.
An 1836 lithograph of tortilla production in rural Mexico Bowl of hominy (nixtamalized corn kernels). Nixtamalization (/ ˌ n ɪ ʃ t ə m ə l ɪ ˈ z eɪ ʃ ən / nish-tə-mə-lih-ZAY-shən) is a process for the preparation of maize, or other grain, in which the grain is soaked and cooked in an alkaline solution, usually limewater (but sometimes aqueous alkali metal carbonates), [1] washed ...
In a process called sulfation, sulphur dioxide reacts with limewater: Ca(OH) 2 (aq) + SO 2 (g) → CaSO 3 (s) + H 2 O (l) Limewater is used in a process known as lime softening to reduce water hardness. It is also used as a neutralizing agent in municipal waste water treatment.
The treatment process was conceived by John L. Leal and the chlorination plant was designed by George Warren Fuller. [47] Over the next few years, chlorine disinfection using chloride of lime were rapidly installed in drinking water systems around the world. [48]
The treatment process was conceived by John L. Leal, and the chlorination plant was designed by George Warren Fuller. [9] Over the next few years, chlorine disinfection using chloride of lime (calcium hypochlorite) was rapidly implemented in drinking water systems around the world. [10] The technique of purification of drinking water by use of ...
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