EKG Remediation of Embankment

Forest of Dean slope stabilisation

Low Impact Benefits

Highway Embankment Stabilisation

Sewage Sludge

Mine Tailings

Railway Embankment Stabilisation

Reinforced Soil

Lagoon Consolidation

Consolidation of Soft Soil

consolidation of sewage Lagoon material

EKG materials in the form of modular drains were used in a trial to dewater lagooned sewage sludge

Once deposited in a lagoon, sewage sludge in the form of a very thick liquid or cake is a difficult deposit to handle and most known methods to remediate or stabilise them are very costly or environmentally intrusive or both. The rationale behind this trial was to dewater the material in situ using EKGs and thus avoid costly double handling and/or mixing with cementitious stabilisers

A field pilot trial using material excavated from a sewage lagoon and placed in large skips demonstrated the effectiveness and efficiency of using ePVDs to dewater lagooned sludge by an in situ process. The trial demonstrated that the technology could dewater sewage sludge thus raising the solids content from 10.5% to 27% whilst at the same time producing a clean discharge filtrate water with BOD< 3.0 mg/l and a COD of 250mg/l. The power consumption was 43kWhr/m³. These data represent the first field trial of this technique and indicate that it can provide a viable economic solution to treating in situ lagoon sludges.

The trial also indicated that significant further improvements in solids contents and reductions in power consumption are achievable at full scale.

	Improvement of sludge through gradual dewatering using EKG

Further details of this trial are available in Lamont-Black, Glendinning, Jones, Huntley & Smith 2005 in the downloads page.