All about Water and Waste Water Treatment
Chemical coagulation The settlement of fine colloidal and suspended solids can be assisted by the use of flocculation as described in last post but with dilute suspensions, such as lowland river waters, the opportunities for collisions and agglomeration are limited....
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With small suspended particles the calculated settling velocities become so small that sedimentation is clearly impracticable, and for most purposes sedimentation is not an appropriate treatment process for particles smaller than about 50μm. If particles are flocculent it is possible...
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Solids suspended in a fluid will settle at a velocity dependent upon their size and density and the density and viscosity of the fluid. The process occurs naturally in the deposition of suspended matter when a river enters a lake,...
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Most sources of water will require some treatment to remove undesirable constituents or simply as a precautionary measure to deal with accidental contamination. Similarly, most wastewaters need considerable purification before they can be safely discharged into the surrounding environment. With...
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The concentrations of impurities found in waters and wastewaters are relatively low compared with normal chemical solutions, so that analytical techniques appropriate to dilute aqueous systems are necessary. In general, concentrations of impurities are expressed in terms of milligrams per...
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Today I am writing about flow measurement techniques The only direct way of measuring flow is to collect the total discharge in a calibrated container or in a weighing tank over a known period of time. This technique is clearly...
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Activated sludge is a process in which organic matter of wastewater is digested/ oxidized using micro-organisms, enzymes in presence of oxygen or in absence of oxygen. The activated sludge or biological flocs mix with the waste stream, oxidize the organic...
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Hard water is the water that contains more than 60 mg/l Calcium, Magnesium and other metal ions. When water source contains limestone or chalk rock which largely made-up of calcium and magnesium carbonate, then that water may contain hardness and...
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Ion exchange is a best technology to remove dissolved contaminant from water, like calcium and magnesium hardness, dissolved ions etc. Dissolved contaminants of water contains cations and anions. Dissolved substances are present in water as ions, which are electrically charged....
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Ion exchange is a technology to soften and demineralise water. This technology is well proven, and was developed initially in the 1900s. it is still the best to remove all traces of contaminants. Ion exchange is an exchange of ions...
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