EVALUATION OF THE FILTRATION PROCESS AT EL-J',1ANSHIA WATER PURIFICATION PLANT.

EVALUATION OF THE FILTRATION PROCESS AT
EL-J’,1ANSHIA WATER PURIFICATION PLANT.
BY
FAHMY M. EL-SHARKt\Wy*; AHA}\·’lED H. EL- DIN; GAZY E.

ABD EL- KAR~M; i\’lAGDA M. ABD EL-ATY

AND HESHAM M. EL-NAGGAR.

*(Environmental Health Depa..rtment, HIPH, Alexandria University)
Key word: Filtration, coliform, standard plate count, total algae, tur idity.
ABSTRACT
Filtration is the most imponant process in the chain of any waLer
p1lt~jication plam. which aids in the removal of color. taste and odor
causing substances. It is considered as a polishing process EIlIJanshia Water Purification Plant is one of the eighT drinking water
purification planEs in Alexandria. It was constl1lcTed in 1976 over an
area of abOIl! 58700 n/ EI-IVfanshia Water Purification PlanE takes
its raw warer direcLly from the special drinking warer canal branched
frOll! rhe lvfahmoudia canal This stud.y aims aL eraluanon of the
ejficiem.y of rhe different rapid sand filters located at Ef-:lvlanshia
water p1lf~fication planE. Resulrs indicate thar Italba .filrer had the
highest effiCiency in removing turbidity (8-1%). co/~form (91%). total
viable bacteria (85 92%) and algae. Immediately before and after
bac/amsh. all phySIcal and biological parameters recording high values.