الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
A Survey analysis has been done for eight water treatment plants in Greater Cairo. TOC, SUVA254, and organic matter mass scanning are the included analytical parameters performed in the survey study. The survey was done on the treatment process in the eight mentioned WTPs. The results showed that all the raw waters in the Nile river were similar in the concentration and composition; however, the raw water of Ismailia and Sharkawia canals differs in composition.
The treatment processes in the eight WTPs were evaluated, and the best removal efficiencies for TOC and SUVA254 were detected in Embaba WTP and Mostorod WTP by 10.5% and 64.1%, respectively. On the other hand, mass scanning showed increased and persistent amounts of Naphthalene, phenanthrene, diethyl phthalate, dibutyl phthalate, and bis(2-Ethylhexyl) phthalate and the best removal efficiency for these compounds were recorded in Embaba WTP.
Aluminum coagulants recovery was made from the sludge wasted from the eight WTPs under the study, and the aluminum recovery reached its maximum in Embaba WTP with 97% and a maximum Aluminum concentration of 666.6 mg/g sludge. Nevertheless, TOC accumulation in the recovered solutions recorded maximum and minimum percentages in El Fostat WTP and Embaba WTP sludge with 79.0%, 36.3%, respectively.
DAC-1030 and DAC-8530 were tested to reduce the amount of transferred TOC, and the former one showed better removal efficacy, and its adsorption kinetics were better explained using Freundlich isotherm. DAC-1030 showed better removal of DOC in recovered solutions with removal efficiency 76.5% using 10 grams on 100 ml of acidified sludge solution.
However, Embaba WTP shows the highest value of TOC, but it shows the best site for applying aluminum recovery as its sludge produces the
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maximum aluminum concentration with the standard conditions for the recovery, the minimum TOC transfer percent, and the second maximum removal efficiency for SUVA254 using activated carbon. That makes Embaba WTP is the most suitable site for aluminum recovery and reuse in the studied WTPs.
Finally, Aluminum recovery from sludge using acidification is a feasible pathway for reducing sludge disposal into waterways and polluting the environment. Also, it shows a proper technique for reducing water treatment and sludge handling costs. A vital consideration for sustainable usage of aluminum recovery techniques should be kept in mind, which is the organic matter accumulation, and our study reported its efficient reduction using activated carbon that would be reactivated during the recovery cycle