Page 14 - أبحاث كلية الهندسة

2017 Publications

Methods X
Volume 4, 2017, Pages 445-456

Optimum efficiency of treatment plants discharging wastewater into river, case
study: Tigris river within the Baghdad city in Iraq

TariqJ.Al-Musawi, Ibrahim A.Mohammed, Huda M.Atiea
The present study aims to manage and determine the most economical efficiency of five
wastewater treatment plants discharging wastewater into the Tigris River in Iraq. The
management system was based on ensuring the five-day biological oxygen demand
concentration in the river is <30 mg/L according to the Iraqi standards. In many cases, the
determined optimized efficiencies were found to be lower than the present working
efficiencies. Although this was good for the environment, it was not cost-effective. This study
revealed that the variation of river flow rates was not an important factor that effects on the
results obtained. It was found that the variation of organic decomposition value in the river
and the minimum efficiency limit of the first upstream plant greatly affected the operating
efficiency of the downstream plants. Furthermore, no constant rank was recorded for the
effects of the natural decomposition on the operating efficiency of each plant. Three points
were highlighted from this study:

 The optimization methods were used to determine the most economical efficiency of
multi wastewater treatment plants.

 The effects of the BOD decomposition value, the river flow, and the minimum
efficiency limit were also investigated.

 This study presents the linear modeling method in detail and has a scientific impact for

similar studies.

https://www.sciencedirect.com/science/article/pii/S2215016117300468?via%3Dihub

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