Advanced oxidation process for taste and odour removal

K-Water owns and operates the Sung-Nam Water Treatment Plant (WTP) in Sung-Nam Metro-City, providing drinking water to Sung-Nam, Yong-in and Suwon City. It serves over 3 million people and a beverage industry filling over 45,000 bottles of drinking water per day.

Seasonal algal blooms cause taste and odour, leading to complaints

Seasonal algal blooms in the Han-River, the Sung-Nam WTP water source, produce elevated levels of taste and odour (T&O) compounds like geosmin and 2-MIB. These T&O compounds are difficult to remove and can only be eliminated through high-strength oxidation.

Difficult T&O compounds require advanced solutions

To assure the delivery of high-quality water, South Korea invested over US$70 billion to build additional advanced water treatment facilities utilising advanced oxidation processes (AOPs) in combination with activated carbon filtration. An AOP system, combining ozone and hydrogen peroxide, would effectively remove these compounds and other contaminants of emerging concern, delivering dependable, high-quality water to residential and industrial customers.

To remove T&O compounds at Sung-Nam WTP, Xylem provided a complete AOP system. K-Water chose Wedeco because the brand offered reliable ozone generating technology, experience in engineering work and efficient mixing technology for operational savings. The Wedeco MiPro eco3 system oxidises taste and odour compounds, destroying them and other organic contaminants.

Ozone is produced by three Wedeco PDO 1000 ozone generators, with a total capacity of 51 kg ozone per hour, fed with liquid oxygen. The ozone feed is combined with hydrogen peroxide to form hydroxyl radicals — highly effective oxidising agents and the key to T&O destruction. Xylem also provided the underground hydrogen peroxide storage and the delivery system that efficiently mixes the ozone and hydrogen peroxide via two DN 1000 diameter ozone injection lines. Following injection, the water flows through two separate concrete contact tanks for reaction and degassing.

Taste and odour complaints eliminated

The reliable and efficient Wedeco ozone generating technology, as well as the outstanding engineering work done by the Xylem team, enabled K-Water to supply high-quality water to its customers, regardless of the season. Highly efficient ozone generation and mixing reduce operational expenditures. The Wedeco MiPro eco3 AOP system completely removes taste and odour causing compounds, eliminating customer complaints and delivering dependable quality.

Xylem

www.xylem.com