GROUND stabilisation specialist Forkers has used mobile silt traps in place of conventional settlement lagoons to clean up wastewater on the M9 spur extension in Scotland.
The use of the skid-mounted Siltbuster traps was included in the £6 million stabilisation tender because of their ability to remove fine particles from the site run-off water without requiring the excavation or maintenance of lagoons.
Site agent Stephen Rule said: 'We saw them as an ideal solution to problems on site, including congestion and the topography.'
The HB50 hopper-bottomed units, connected in parallel, allow the batched removal of sediment, which include excess slurry from grouting.
Site water is pumped to a settlement lagoon, then pumped into the Siltbusters units at up to 60 cu m an hour. Treated wastewater flows to a nearby river.