KOREAN NET

On the left is the conventional method of removing fine particles in the air inside a subway station and on the right is a new dry approach. (Korea Institute of Machinery & Materials)

By Kang Gahui

A new technology removes masses of ultrafine particles in the air inside a subway station using static electricity and no filter.

The Ministry of Science and ICT on March 24 held a demonstration of the results of its research and development (R&D) of a new approach toward reducing ultra-fine particles at the subway station Seodaejeon Negeori in Daejeon.

Conventional devices to reduce fine particles have a low distribution rate because of high electricity consumption and difficulties in maintenance.

Using microcurrents, the research team developed an air purification technology that combines ions and fine particles in the air and then divides and reduces both by using static electricity.

The new technology lowers the ozone generation concentration to a tenth of the normal atmosphere (5 ppb or lower), which makes it easier to apply to indoors. It also slashes maintenance costs in allowing dry cleaning with no need to replace filters.

Demonstrated at subway stations in Daejeon like Seodaejeon Negeori, Oryong and Jung-gu Office, this technology will be expanded for use at other stations and multi-purpose facilities such as schools and department stores nationwide.

"The latest R&D result is an example of the commercialization of technology that greatly benefits the lives of the people rather than just remaining in an academic paper," Deputy Minister of Science and ICT Hwang Pan-Sik said. "We will reinforce efforts to support the commercial application of this technology."

kgh89@korea.kr