الفهرس 
Sedimentation Unit (As Clariflocculator)
Rapid Sand FilterOnly 14 pages are availabe for public view
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Abstract
Due to the rate increase for potable water need, the general project trend is the vertical expansions for water treatment plants instead of the horizontal ones. By upgrading the existing plants using new technology to reach the maximum capacity and conserve the water quality parameters as the Egyptian Code states. As the benefits of plant upgrading are no new land is needed also, low cost solution, comparing with the construction of new water treatment.
This study aims to upgrade the existing water treatment plants using dissolved air floatation system, in order to reach the maximum possible capacity using several possible scenarios without adding major civil works.
The study shows that, the scenario which involves DAF technology then sedimentation and filtration has the best removal efficiency because it has three treatment phases. The use of one treatment phase from floatation or sedimentation followed by filtration achieved lower efficiency. At last direct filtration, considering low removal efficiencies due to the high rate of filtration which allowed the suspended solids to escape.
For the application upon Al Ameriyah water treatment plant, the first proposal with five combined tanks, two tube settler and one filter tank is the most convenient proposal to be achieved. Since it has high technical evaluation with the least estimated cost 79,550,000 LE. The use of DAF technology combined with sedimentation gives the chance to increase the existing plant capacity from 520000 m3/day to 864815 m3/day with percent increase equals 66.31% which is a convenient technical and financial solution.