الفهرس 
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Abstract
Egypt is currently facing a major problem to provide water suitable for
agriculture as a result of the growing shortage of water received from
upstream countries. Nowadays, many governorates in Egypt are rapidly
growing like Cairo, Alexandria, etc.; these governorates suffer from
various problems regarding the availability of potable water for human
usage. As a result, we need to reduce the amount of potable water used in
irrigation and substituting it with well treated wastewater. Implementing
economical and effective wastewater treatment techniques is an urgent
requirement. The main objective of this research is to assess the technique
performance of the aerated modified trickling filter (AMTF) which was
monitored for several months using different multimedia and the analysis
focused on chemical oxygen demand (COD), biological oxygen demand
(BOD) and total suspended solid (TSS) of the influent and effluent
wastewater. A pilot plant was designed, erected and operated in Zenien
wastewater treatment plant, Giza Egypt. Two type media configuration
were tested as follows, the first media named sandwich media consists of
non-woven polyester, date palm fiber and hair buckles with sponges,
while the second media consists of sand with light weight bricks. The
results showed that the sandwich media was effective in TSS removal with efficiency reaching 94.6 %, while the removal of COD reached 86 %
and BOD removal reached 85 %. While the sand with bricks media
achieved TSS removal with efficiency reaching 61.11 %, while the
removal of COD reached 43.4 % and BOD removal reached 42.5 %. The
pilot plant achieved removal efficiency of 63 %, 58 % and 60 % for
ammonia, phosphorous and fecal coliform respectively and percentage
increase in dissolved oxygen reached 69 % using the cascade setup.