The active skimmer is a submersible pump pneumatically driven which is specific for the recovery of LNAPL. The pump is equipped with a floating mechanism that allows the entry of only LNAPL, if it is present. The active skimmer consists of a reamer (skimmer) devoted to the separation of water/oil, equipped with a floater for the recovery with gravity. Another fundamental part of the active skimmer system is a pumping unit situated below the skimmer and useful to send the product to the superficie through ON/OFF cycles of compressed air (total fluid pumps). 

The recovery of product happens with gravity, indeed its efficacy depends on the combination of viscosity and initial thickness. Under the best conditions of viscosity and initial thickness, the active skimmer is able to visibly reduce the layer of LNAPL.

The total length of the active skimmer is 180 cm, of which, 40,5 cm constitute the useful floating part.

Specifications

• Materials: fiberglass, steel, Viton, tygon

• External diameter: 48 mm

• Specific gravity of extracted product: ≤ 0,85 g/cm3

• Kinematic viscosity: 1-1000 cSt

• Initial thickness of the product: from 20 mm to 70 mm (depending on the viscosity)