Recovery of alum from wasted sludge produced from water treatment plants

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• Prof. Chemical Engineering Dept. Faculty of Engineering. Alexanderia University, Alexanderia. Egypt.
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• Associate Prof. Dept. of Engineering Physics and Mathematics. Faculty of Engineering. Zagazig University, Zagazig. Egypt. (Author to whom correspondance should be adressed).
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• Research Engineer, Chemical Engineering Dept, Faculty of Engineering. Alexanderia University. Alexanderia. Egypt.
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