Assessment of the Performance of Mogran Water Treatment Plant During Flood Season
Assessment of the Performance of Mogran Water Treatment Plant During Flood Season
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Date
2015-04-27
Authors
Nada Ibrahim Ahmed
Journal Title
Journal ISSN
Volume Title
Publisher
University of Khartoum
Abstract
The quality of surface water depends upon the character and the area
of water shed ,its geology and topography, the extent and nature of the
development by man , time of year and weather condition.
Blue Nile as a surface water resource; its water quality affected by
many of the above factors (the extent and nature of the development by
man which include removal of vegetation by cutting forest and
unmanaged agriculture)that lead to excessive soil erosion particularly
during the flood season so, produced high turbid water .The range of
turbidity reached 21400 NTU and TSS 25500 during the flood season of
the year 2002 in august .The water quality patter for the Blue Nile had
been assessed by using daily recorded data from Mogran w/ws during the
flood seasons for the year (1994-2003).
To treat such turbid water , plain sedimentation is essential before
coagulation and filtration processes. At present Khartoum state water
treatment plants have no plain sedimentation units and the treatment used
was coagulation followed by filtration. The common coagulant used was
Aluminum sulphate (alum), the doses applied exceeding WHO standards
which is 150 p.p.m and the applied dose reach 620p.p.m during the flood
season of 1990 (august). Using of alum for high turbid water was found
impractical.
Two effective coagulants were used: organic polymer called poly
DADMAC used as coagulant aid with alum, it was effective for high
turbidity and color removal and decreasing the amount of sludge resulting
from the flocculation process. But it needs exact chemical analysis such
as polymer content, monomer content, organic and inorganic
contaminants to avoid the health risks associated with residual polymer,
monomer and contaminants.
The other effective coagulants was inorganic polymer called Poly
Aluminum Chloride (PAC), also found effective for high turbidity
removal and found less in daily amounts used and cost comparing with
alum and polymer with alum. Also the doses should be within the
recommended safe dose to avoid the health risks associated with residual
aluminum .
At all Khartoum water plants , there is no treatment for the sludge and
deposits that resulting from flocculation process and they were discarded
directly to Nile .
Description
A Thesis Submitted in Partial Fulfillment of Requirement
for the Degree of M.Sc. in Water Resources Engineering
Keywords
University of Khartoum
Mogran Water Plant
Water
Flood Season
Raw Water
Civil Engineering
Citation
Nada Ibrahim Ahmed, Assessment of the Performance of Mogran Water Treatment Plant During Flood Season. – Khartoum : University of Khartoum, 2004. - 122 P. :
illus., 28 cm., MS.C.