sewage treatment; sewage disposal
Technical and administrative term for the process of treating wastewater. Often used in environmental, municipal, and engineering contexts.
In this area, the development of sewage treatment facilities is an urgent task.
Sewage treatment technology is advancing year by year.
下水処理 is a broader term for general wastewater treatment, while 汚水処理 often specifically refers to the treatment of sewage or foul water.
Compound of 汚水 (osui, 'sewage, dirty water') and 処理 (shori, 'treatment, processing').