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M.R. Samrat, P. Chowdhury, A.A Shuvo (2018). Evaluation of a water treatment plant in Chittagong city, Bangladesh. Proceedings of the 1st national conference on water resources Engineering (NCWRE-2018).


Water is one of the most vital element for mankind’s survival. So, ensuring better quality of drinking water is of the utmost importance. Chittagong, the port city of Bangladesh is having issues due to increasing demand of drinking water. In order to satisfy the demands of people, Chittagong Water Supply and Sewerage Authority (CWASA) of Bangladesh has undertaken the project ‘Chittagong Water Supply Improvement and Sanitation Project (CWSISP)’. The primary purpose of this project is to construct a surface water treatment plant at Modunaghat, Chittagong. The project cost is about 170.0 million USD and is funded by the World Bank. The aim of this study is to work on the treatment process of Modunaghat Water Treatment Plant (MWTP). Halda River will be used as the source of raw water for the plant. Everyday about 100 Million Liter per Day (MLD) water will be drawn from the river. About 90 MLD will be ready to be distributed among the people and the Remaining 10 MLD will be used for backwashing and chlorine mixing. The drawn water will be treated through several processes i.e. Collection of water, Removing Screenings, Chemical Dosing, Coagulation, Flocculation, Sedimentation, Filtration, Chlorination, Distribution. Several chambers and filters will be used for the treatment processes. Modunaghat Water Treatment plant will use Chlorine as disinfectant as it can kill certain bacteria and other microbes in water. Chlorine is also much cheaper compared to the other disinfectants. Other methods like ultraviolet and ozonation are not as cheap and effective as chlorination. So, Chlorine is a better option for the treatment process.

Authors: M.R. Samrat, P. Chowdhury, A.A Shuvo.

Link(s) for the Paper: Journal Website | ResearchGate