Keywords : Characteristics

Impact of Raw Water Characteristics on Aski - Mosul Water Treatment Plant

Sati M. AL-Rawi; Adil A. Bilal

Iraqi National Journal of Earth Sciences, 2013, Volume 13, Issue 1, Pages 1-12

It was claimed that the studied plant did not perform as expected. A careful investigation was carried out to troubleshoot any inconveniences. Many visits to plant site and discussion with managers and operators were made. A series of tests on samples taken from different sites in the river for various quality parameters such as pH, total solids TS, total dissolved solids TDS, electrical conductivity EC, Turbidity, nitrates NO3, phosphates PO4 , total plate bacterial count TPC, and algae were conducted .
The results revealed that the plant suffered a lot of problems. The plant acted as a passing through units. No significant change could be detected in received and treated water characteristics. Maintenance of various units were rarely practiced, and if it was done it would take long time. Pretreatment by alum was not carried out. This would complicate settling of flocs in subsequent units and might lead to growth of microorganisms.
As the plant located downstream a big impoundment lake, the incoming water characteristics were relatively acceptable and bear a sign of eutrophied water particularly phosphates and nitrates. Patches of algae could be seen adhered to sedimentation tank walls.
Backwashing of filters was done by air scour only through the recent 20 years. This led to loss of fines and cracks in filter bed. Gradation of media grains and the depth of sand layer were not adequate. Acid loss of used media amounted to 6.3% which was excessive and beyond authorized criteria
Removal of algae and bacteria was low as filter medium pores were relatively Large due to loss of fines and due to possible contamination.

Some Characteristics of Tigris River Pollution for Baghdad City

Qusai Y. Al-Kubaisi; Haifaa A. Ebrahim

Iraqi National Journal of Earth Sciences, 2004, Volume 4, Issue 2, Pages 76-83

Six observation sites were chosen from Tigris River for Baghdad City to know the pollution with major, minor and trace elements (physical and chemical properties). The study depended on 24 variables in two periods, first in January and the second in April from water year 1999-2000 to show the characteristics of pollution and the effect of embargo on this water resource. The results reflect that higher concentration in some elements when we compare the results with previous study especially in SO4, Fe, Ni and Cd, so we must put suitable plans to stop this deterioration in the environment of Tigris River.