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Mixers and Air Jets from Landia have played a vital role in the success of a former landfill site in Singapore, which has been transformed into the new Lorong Halus Wetland.

Part of the major Punggol Promenade project, which was recently opened by Singapore’s deputy prime minister Teo Chee Hean, the new wetland includes two 70m long, 30m wide treatment lagoons for leachate, both with a capacity of 6,300m3.

Each of these lagoons are served by four Landia Air Jets and two mixers, all made from stainless steel and mounted on pontoons, which break down pollutants such as nitrogen compounds in the leachate.

Following its pumping to five reed beds that absorb the nutrients, the leachate flows into five polishing ponds, where solids settle, and plants further absorb nutrients, with remaining liquid transported to the used water network.

Located in north-eastern Singapore, along the eastern bank of Serangoon Reservoir, Lorong Halus Wetland is now an educational biodiversity site.

The project is part of the Active, Beautiful, Clean Waters (ABC Waters) programme created by Singapore’s national water agency PUB.

The Lorong Halus Wetland also provides a tranquil space for the public to enjoy the haven that has been created for birds, butterflies, dragonflies and other wildlife.

The Riverside Walk portion of the 4.9km-long Punggol Promenade also allows families to enjoy the natural setting of the river banks.

Designed with exercise stations, dedicated bicycle and jogging tracks, as well as lookout points that allow visitors to get closer to the water’s edge, the promenade – when fully completed at the end of 2011 – will provide seamless public access to the entire Punggol waterfront and provides a corridor to support future waterfront housing and a range of recreation developments.

Suitable for applications in which liquid levels vary, Landia’s non-clogging Air Jets are self-aspirating so do not require a compressed air supply.

Designed with vigorous mixing capabilities, oxygen transfer is vastly improved and sedimentation is prevented.

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