IWRA 2023 Online Conference - Emerging Pollutants: Protecting Water Quality for the Health of People and the Environment
Theme 4: A circular economy approach: Lifecycle management of emerging pollutants
Author(s): Mezanur Rahaman, Masters of Science in Civil and Environmental Engineering Bangladesh University of Engineering and Technology (BUET)
Mezanur Rahaman, Masters of Science in Civil and Environmental Engineering Bangladesh University of Engineering and Technology (BUET)
Oral: PDFAbstract
Background of the Study
Nowadays, majority of the people of Dhaka City in Bangladesh are completely depending on supplying water from production tube wells (PTWs) under the Dhaka Water Supply and Sewerage Authority (DWASA) for household potable water use for ensuring the water safety. However, proper understanding, characterization and prediction of water quality behavior in the drinking water distribution system are critical to ensure to meet regulatory requirements and customer-oriented expectations.
Objectives of the Study
The main objectives of the study are as follows:
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Assessment of the effectiveness of the current chlorination system.
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Prediction of the concentration of residual chlorine over space and time.
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Calibration and validation of the hydraulic model using time-patterns.
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Determination of the sensitivity of the residual chlorine model.
Main Findings of the Study
The main findings of the present study are the following:
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Significantly higher value of kb in the PTWs and moderately high temperature over the DMA.
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The value of kw was nearly same to the kw values in literature.
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More than 50% pipes were found with zero residual chlorine at baseline condition.
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In the baseline condition, only chlorine two injection points were available.
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Insufficient coverage of residual chlorine in DMA.
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Observed and predicted values found close to each other.
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Simulation of different chlorine injection strategies was made to ensure the full chlorine coverage of the DMA.
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100% chlorine coverage could not be obtained over 24 hours.
18 January 2023, 15:00 - 16:30 CET