The original Lagoon Type Leachate Treatment Plants (16 No. sites)
 

WALPOLE DROVE LANDFILL SITE LEACHATE TREATMENT PLANT

Client: Somerset County Council (now Wyvern Waste), Somerset, England
Operational: April 1989 to the present.

Situated just north of Bridgwater, Somerset; Walpole Drive is a large, clay lined, partially land-raised landfill on the Somerset levels.

Aspinwall (now part of Enviros), assisted Somerset County Council's Engineering Staff to design the landfill, and the leachate treatment plant.

A major concern raised at the planning application stage was that the landfill would pollute the very ecologically sensitive, slow flowing drains of the Somerset levels. The leachate management system and integral treatment plant successfully addressed all the objections, and the landfill was approved. It was agreed that the leachate treatment plant would be built at the same time as the first cells commenced acceptance of waste.

Leachate is treated at rates of up to 200 m3/d, in a twin lagoon SBR system, before being pumped 4 km to discharge into the tidal estuary of the River Parrett. All operations are controlled by a PLC, with the daily discharges being made automatically, in accordance with a microprocessor based tide time prediction.
 
Aspinwall provided all consultancy, design, supervision and commissioning inputs to the project.

Why do we continue to display case studies of such old sites?
We agree that they are far from the “cutting edge”, and certainly not “state of the art” for the UK, and elsewhere. Nevertheless, the site owners continue to use them, and when asked we continue to provide support. Such designs continue to be appropriate for some projects, and in some countries.

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