الفهرس 
Water situation in Egypt
MATERIALS AND METHODSOnly 14 pages are availabe for public view
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Abstract
The present study introduces an application of solar energy in water treatment
and desalination for small scale needs. A lab scale solar system is used for
brackish and agricultural drainage water (ADW) treatment and desalination.
ADW passes through sand filter to solar collector, and then the heated water
enters to evaporating chamber maintained at low pressure. Once the hot water
enters to this chamber it is evaporated and condensed to fresh water. The
effect of the different factors such as solar radiation, vacuum pressure,
cooling water flow rate and inlet water temperature on system productivity
was studied. An economic analysis was conducted to estimate the cost of
water production by the proposed system. The system was efficient to reduce
Total Dissolved Solid (TDS) from (1500-2400 mg/lit to less than 15 mg/l)
and to reduce the Chemical Oxygen Demand (COD) from (50- 90mg/lit to
less than 5 mg/lit).The proposed system gives a reasonable production of
fresh water up to 5 lit/m2/day with total cost 0.1 LE/lit. The system achieved
gained output ratio (GOR) was about 1.2 and distillation efficiency was about 52%..