CO2: Maintaining tap water quality in Japan


Two applications of carbon dioxide (CO2) that help improve tap water quality are experiencing a surge in usage in Japan, according to The Gas Review.

First introduced in the early 1990’s, CO2 gas is often used to adjust the pH of alkaline water when it flows from rivers or dams to water treatment plants. Depending on the scale of the treatment plant, annual usage of CO2 can be as high as 300 tonnes.

Another application that is gaining popularity, is the use of CO2 to clean water pipes that carry tap water from treatment plants to homes. 500 kg/h of pressurised gas is used to quickly clear out contaminants.

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