الفهرس 
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Abstract
Greywater is considered a new water resource because of water scarcity all over the world. Thus collecting, treating, and reusing it safely is critical for protecting the environment from any hazard. As a common application of
greywater reuse, irrigation includes specific characteristics of the water that need to adopt a grey wastewater treatment technology. In this research, an advanced oxidation process based on Fenton’s reaction was
used to evaluate the greywater treatment efficiency by testing specific
parameters before and after oxidization, determine the optimum chemical ratio
between iron salts (ferrous sulfate) and Hydrogen peroxide (Fe2+
/H2O2), and
find the optimum retention time to reach the permissible limits according to the
ECP, 501-2005 (Egyptian Code No. 501 of the year 2005)1
.
An experimental model including three glass tanks with dimensions of
30×30×50 cm was established. The model consisted of a primary sedimentation
tank to allow total suspended solids to settle, followed by a tank for chemical
treatment with Fenton‘s reagent where iron salts of 0.3 gm per litre and
hydrogen peroxide with four different doses were added representing chemical
ratios between Fe2+
/H2O2 of 1:3, 1:4, 1:5, and 1:6 to determine the highest
efficiency of the reaction, then followed by the collecting tank.
from the obtained results, it was concluded that the optimum chemical ratio of
Fe2+
/H2O2 is 1:5 for a retention time of 30 minutes to achieve the permissible
limits of the treated greywater to be reused in irrigation according to the ECP. Keywords
Chemical oxidation, Fenton‘s reagent, Hydrogen peroxide, BOD, COD, TDS,
TSS.