Journal of Applied Science and Engineering

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Thares Srisatit1, Chawalit Chaiwong2, Sumeth Wongkiew3,4, and Pongsak (Lek) Noophan This email address is being protected from spambots. You need JavaScript enabled to view it.2

1Environmental Engineering Association of Thailand
2Department of Environmental Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand
3Department of Environmental Science, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
4Water Science and Technology for Sustainable Environment Research Unit, Chulalongkorn University, Bangkok, Thailand


Received: January 13, 2023
Accepted: March 14, 2023
Publication Date: March 9, 2023

 Copyright The Author(s). This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are cited.

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Water production and distribution for the people in Bangkok, Nonthaburi, and Samut Prakan areas, have faced the problem of using salty tap water. Problem has been specially found in the water supply services in the eastern part of the Chao Phraya River basins that mainly use the Chao Phraya River as a raw water source for producing the water supply. The problematic issue of high salinity in the produced water supply can be caused by the seawater from the gulf of Thailand intruding into the Chao Phraya River. Therefore, this research aimed to study and find out proper solutions to the problem by reusing the treated wastewater from the Bangkok wastewater treatment plants as raw water to produce water supply during the seawater intrusion period. Based on the study results, it was found that the reuse of the treated wastewater as a raw water source for tap water production could not be practically suitable because BMA has reused some of the treated wastewater for their activities as well as discharged some of it to maintain the environmental and ecological conditions of the river and canals. Hence, two approaches have been suggested as possible solutions to the faced salt tap water problem including 1) relocation of the water intake station (the raw water pumping station) to prevent the high salinity polluting the raw water resource during the seawater intrusion period, and 2) provision of new water reservoirs for especially reserving raw water for producing water supply during the seawater intrusion period.

Keywords: Salinity intrusion, wastewater reuse, wastewater treatment, raw water, Bangkok


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