News & Events

[Newsletter] [Community Services] [Dunwell Activities] [Presentation & Publication] [Guest Visit]

Successful Completion on 7th Gasholder Seal Replacement

Dunwell Engineering Co., Ltd. successfully completed the 7th gasholder seal replacement project for the Drainage Services Department of HKSAR on Jan., 2007. This is also the 4th successful bid for the similar project from 2003.

In Hong Kong, there are ten methane gasholders for storage of bio-gas/methane generated by the sludge digestion. They are located at Shatin, Tai Po, Shek Wu Hui and Yuen Long Sewage Treatment Works. There are still two methane gasholders that have not yet replaced the gasholder seal.

The new gasholder seal is specially designed for storage of bio-gas/methane generated from the sewage treatment works. Comparing with the old gasholder seal, the new one is more durable, safe and higher impermeability of methane. As methane mixed with air would explode when there is a spark, adoption of the new gasholder seal with effective impermeability of methane is a critical safety measure. The new gasholder seal has been adopted in more than 100 gasholders over the world, and it's proven to be an effective measure to prevent inflammable gas leakage.

In the coming years, the sewage treatment works of Hong Kong would achieve higher safety standard on storage of methane by installation of new gasholder seal.

Mr. Joseph Carey is guiding our workers to install the new gasholder seal.