Search results
Results from the WOW.Com Content Network
Filtration is a physical separation process that separates solid matter and fluid from a mixture using a filter medium that has a complex structure through which only the fluid can pass. Solid particles that cannot pass through the filter medium are described as oversize and the fluid that passes through is called the filtrate . [ 1 ]
The most comprehensive history of water filtration was published by Moses N. Baker in 1948 and reprinted in 1981. [19] In the 1800s, mechanical filtration was an industrial process that depended on the addition of aluminium sulfate prior to the filtration process. The filtration rate for mechanical filtration was typically more than 60 times ...
Slow "artificial" filtration (a variation of bank filtration) into the ground at the Water purification plant Káraný, Czech Republic A profile of layers of gravel, sand and fine sand used in a slow sand filter plant. Slow sand filters may be used where there is sufficient land and space, as the water flows very slowly through the filters ...
Dead-end filtration; all of the process fluid flows and all particles larger than the pore sizes of the membrane are stopped at its surface. All of the feed water is treated at once subject to cake formation. [18] This process is mostly used for batch or semicontinuous filtration of low concentrated solutions. [19]
The types of filters used in the procedure differ depending on the contaminants present in the water. Particle filtration and Membrane filtration are the two main forms of waste water filtration. [12] Dissolved air flotation (Degasification) is the process of removing dissolved gases from a solution.
Nanofiltration is a membrane filtration process that uses nanometer sized pores through which particles smaller than about 1–10 nanometers pass through the membrane. Nanofiltration membranes have pore sizes of about 1–10 nanometers, smaller than those used in microfiltration and ultrafiltration , but a slightly bigger than those in reverse ...
Ultrafiltered milk is essentially cow's milk that has gone through an extra filtration process, Caroline Susie, a registered dietitian based in Dallas and spokesperson for the Academy of Nutrition ...
As the contaminant separation process takes place in the filter medium, factors such as flocculation time, filtration velocity and flocculent dosage are required to be monitored regularly, as they can directly affect the flocculent size produced. This is vital to the process in order to prevent potential clogging or bioclogging of the filter bed.