White water treatment

White, D.A., Helbig, J., Production of floes for water treatment by electrodialysis in a cell fitted with an inorganic membrane. Progress in Membrane Science Technology Conf, pp.35-36, Univ. of Twente, The Netherlands, 1996. 

Properties Commercial grades Uses Manufacture White to grayish-white solid. Reacts with water to form calcium hydroxide. Commercial lime is available in lump, pebble, ground, and pulverized forms. One of the oldest commercial chemicals. Used in hundreds of applications. The most important uses are for making steel and chemicals, water treatment, pollution control, pulp and paper, and construction. Limestone (calcium carbonate, CaCOj) from mines or quarries is heated in a kiln (calcined). 

The zinc sulphate produced in this process can be turned more easily to commercial account than iron sulphate. If to the solution of the zinc sulphate resulting from the process sodium carbonate or sodium hydrogen carbonate is added, a precipitate of hydrated zinc basic carbonate or zinc carbonate is obtained, which on ignition in a furnace yidds zinc oxide (commercially known as zinc white ), water, and carbon dioxide. Zinc white has a commercial value as a basis or body In paints it has one great advantage over white lead, which is used for the same purpose, in that it is far less poisonous. This method of treatment of the residual... 

The vendor claims that Ensol is applicable for the treatment of wastewaters including sewage after primary treatment, metal plating and finishing waters, and paper mill white water. The claim also extends to the treatment of solid wastes and soils, provided that they contain sufficient free water. 

It is interesting to note that compound 4, which was found only in small quantities in the first step of the simulated waste water treatment, is one of the main components in the second step, that is, the decolorization of the hydrolysed Remazol Black by treatment with the white rot fungus Trametes versicolor in sequencing batch reactors [20],... 

Avoided water treatment costs. These costs will vary over a wide range depending on the process. For a food processing plant they are likely to be relatively modest—perhaps only US 1/1000 gal or less—but treating latex emulsion plant effluents (called white water) can cost as much as USS10/1000 gal or more. 

All of the carbonato cobalt(III) complexes reported here are reddish in color and extremely soluble in water. The rhodium complex is pale-yellow, whereas the iridium salt is virtually white they are both soluble in water. Treatment with dilute acid immediately gives the corresponding aqua complex with evolution of carbon dioxide. The characterization and the mechanistic details of acid hydrolysis of these complexes have been reported.3,4,11... 

Cortec Corporation of White Bear Lake, MN, is a manufacturer of environmentally responsible packaging, metalworking, cleaning, water treatment and metal protection technologies. Cortec manufactures over 300 products in five plants located in Minnesota, Wisconsin. It is a global supplier of environmentally-friendly speciality chemicals, plastics and coated paper. 

This compound is formed as a white precipitate from the interaction of ammonium aci-nitro-acetate and mercuric chloride in aqueous solution. It sublimes when carefully heated, detonates when strongly heated, and when ignited burns with a luminous flame,. In bases it dissolves readily, but is almost insoluble in boiling water. Treatment with bromine in potassium bromide solution forms ethyl dibromonitro-acetate, and potassium iodide removes the mercury from the anhydride as mercuric iodide. 

Calcium hypochlorite is a white solid that can be purchased in granular, powdered, or tablet form. The chemical is good for small water treatment plant disinfection applications. For disinfection of swimming pool water, the solid calcium hypochlorite is also frequently used. ... 

Sodium sulfite is an odorless, solid white powder with a salty sulfurous taste that is soluble in water. It is a reducing agent that is used as a food preservative and antioxidant. Its use is prohibited in meats and other sources of vitamin Bj. Sodium sulfite is also used in the treatment of semichemical pulp in the paper industry, in the treatment of water, as a photographic developer, and in textile bleaching (antic-hlor). It has also found historical use in the water treatment field as a dechlorinating agent. 

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