Abstract
This study was conducted on the Al-Hartha Water Treatment Plant (HWTP), the largest water treatment plant in the city of Basra, during the period from December 2017 to March 2018. This study gives a description of the units and components of the HWTP, and aimed to evaluate the efficiency of the plant by calculating the efficiency of its sedimentation, filtration and sterilisation basins. Additionally, it aimed to examine its water quality by examining the physical and chemical characteristics of the raw water and treated water at this plant and then comparing the findings with the World Health Organisation (WHO) and Iraqi standard limitations. The results of this study showed that the efficiency of the sedimentation basins is 57%, while the efficiency of the filtration basins is 13.3%, and the sterilisation efficiency ranges from 27 to 50%. The laboratory results for the treated water quality have shown that the turbidity is equal to 12.8 NTU, electrical conductivity (EC) is equal to 7750 µs/cm, the total salt concentration of the total dissolved solids (TDS) is equal to 5200 mg/l, and the concentration of the total suspended solids (TSS) is equal to 65 mg/l of the water outside from the HWTP. All these water quality results are higher than the WHO and Iraqi standard limitations, except the pH value of 6.95, which is within the permissible limits.
Highlights
Basra is the largest city in southern Iraq and the third-largest city in Iraq in terms of area and population density, with a population of about 2.5 million according to estimates in 2014
The efficiency of the Sterilisation Process (Disinfection) of Water When estimating the efficiency of the water sterilisation process, it is known that filtration does not work efficiently to remove bacteria and smallscale viruses that are smaller than one micron
The efficiency of the cleansing is provided as a percentage of the number of germs that have been killed from the number of germs already present.The killing of germs depends on several interrelated factors: for example, the efficiency of the disinfectant to penetrate the living cells, the quantity of the disinfectant and the number and type of germs
Summary
Basra is the largest city in southern Iraq and the third-largest city in Iraq in terms of area and population density, with a population of about 2.5 million according to estimates in 2014. It is the administrative and political Centre of the province of Basra, which is the economic capital of Iraq, and Iraq's main port. It is located in the far south of Iraq on the west bank of the Shatt Al-Arab River.
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