Case Study

Lagoon maintenance

Situation


The client needed to empty a surface water settlement lagoon that was collecting water from highways drainage. This lagoon filters the solids and hydrocarbons prior to releasing into a nearby brook. The lagoon needed emptying to enable silt removal and repair work, which not only meant dewatering the contaminated water in the lagoon but also providing a continual by-pass for the brook inflows.

As the work commenced the water needed treatment to remove suspended solids and allow for the removal of light hydrocarbons, to ensure that there was no pollution discharged into a nearby SSSI site (Site of Specific Scientific Interest).


Solution


Using a series of lamella tanks with onboard oil removal syphons, all the discharge water left the site free of solids and hydrocarbons.

Outcome


The highly contaminated water was safely cleaned and discharged into the nearby brook well within the parameters required by the consent permit. This significantly reduced the very costly risk to the client of polluting a SSSI site.