International Journal on Science and Technology

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Seasonal Variation Of Water Quality Index At Raw Water Collection Point of Saidabad Water Treatment Plant And Its Impact On Plant Operations

Author(s) Sohel Talukdar, Rizq Amin Mahmud Khan
Country Bangladesh
Abstract This study was conducted to determine the seasonal variations of the water quality index at the raw water collection point of the Saidabad Water Treatment Plant (SWTP) and its impact on plant operations. Firstly, monthly water quality and plant operational data were collected from the SWTP and the Department of Environment (DoE). Commonly used water quality parameters i.e., Chemical Oxygen demand (COD), Biochemical Oxygen Demand (BOD), Dissolved Oxygen (DO), Alkalinity, Ammonia, Total Dissolved Solid (TDS), pH, Electrical Conductivity (EC), Temperature, and Fecal Coliform data have been collected and used for the study. Variations of water quality parameters and Water Quality Index (WQI) were analyzed for the raw water collection point of SWTP and the Demraghat point (Upstream of the raw water collection point of SWTP) of the Shitalakhya River. Widely used WQI methods (WAWQI, CCMEWQI, and NSFWQI Methods) were used for the determination of the WQI at the raw water collection point of the SWTP and Demraghat from the year 2017 to 2021. The ranges of WQI values were found between 49 to 224, and 42 to 90 by using WAWQI, and CCMEWQI methods, respectively at Demraghat point in pre-monsoon, monsoon, and post-monsoon periods from the year 2017 to 2021. It was found that WQI values were very high at the raw water collection point of SWTP using the WAWQI method compared with the Demraghat point of the Shitalakhya River due to higher concentration of Ammonia and lower DO values. DO level and Ammonia concentration were found exceeded the permissible limits set by DoE for most cases from the year 2017 to 2021. Overall, the condition of the waterbody of the Shitalakhya River was found very poor from the year 2017 to 2021.
Keywords Water Quality Index, Water Treatment Plant, Plant Operational Cost, Saidabad Water Treatment Plant
Field Engineering
Published In Volume 16, Issue 2, April-June 2025
Published On 2025-06-10
DOI https://doi.org/10.71097/IJSAT.v16.i2.5861
Short DOI https://doi.org/g9pz7s
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