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Dissolved air flotation (DAF) is a water treatment process that clarifies wastewaters (or other waters) by the removal of suspended matter such as oil or solids. The removal is achieved by dissolving air in the water or wastewater under pressure and then releasing the air at atmospheric pressure in a flotation tank basin.
The process by which the dosage and choice of flocculant are selected is called a jar test. The equipment used for jar testing consists of one or more beakers, each equipped with a paddle mixer. After the addition of flocculants, rapid mixing takes place, followed by slow mixing and later the sedimentation process.
Despite its widespread use in the performance of so-called "dewatering experiments", the jar test is limited in its usefulness due to several disadvantages. For example, evaluating the performance of prospective coagulants or flocculants requires both significant volumes of water/wastewater samples (liters) and experimental time (hours).
Long-chain polymer flocculants, such as modified polyacrylamides, are manufactured and sold by flocculant producers. These can be supplied in dry or liquid form for use in the flocculation process. The most common liquid polyacrylamide is supplied as an emulsion with 10-40% actives and the rest is a non-aqueous carrier fluid, surfactants and ...
The Portable Aqua Unit for Lifesaving (short PAUL) is a portable ultrafiltration-based membrane water filter for humanitarian aid. It allows the decentralized supply of clean water in emergency and disaster situations for about 400 persons per unit per day. The filter is designed to function with neither chemicals nor energy nor trained personnel.
Shower door. Other common devices for containing water spray include a highly flexible, waterproof bathtub or shower curtain, or more recently, a shower door, which is a permanently installed sliding or pivoting door made from glass or plastic. Containing water spray, leaks, and splashes within the bathtub is particularly important in bathrooms ...
Friction reducer, flocculant 68551-12-2: Alcohols, C12-C16, ethoxylated (a.k.a. ethoxylated alcohol) Floor cleaner, stain remover, wellbore cleaner, emulsifier 64742-47-8: Aliphatic hydrocarbon / hydrotreated light distillate / petroleum distillates / isoparaffinic solvent / paraffin solvent / napthenic solvent: Tar remover, lubricant 64743-02 ...
A bathroom cabinet is a cabinet in a bathroom, most often used to store hygiene products, toiletries, and sometimes also medications such that it works as an improvised medicine cabinet. There are two main types of bathroom cabinets: vanity cabinets which are usually placed under sinks and mirror cabinets which are usually placed over sinks or ...