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

COMPTON BASSETT LEACHATE TREATMENT PLANT

Client: Wiltshire County Council (current operator Hills Aggregates)
Date Operational: Summer 1985 to date.

The Compton Bassett Leachate Treatment Plant was designed to treat leachate from an old, closed district council waste disposal site, at Sands Farm, and for a large adjacent containment site at Compton Bassett. Leachate is treated in an aerated lagoon SBR plant at rates up to
100 m3/d, primarily to nitrify high concentrations of ammoniacal-N.

Left: Compton Bassett in the late 1980s, with our first experimental reed bed visible on the far side of the compound.

At the time this was seen as an innovative design by Aspinwall (now Enviros), and initially the plant used waste jam washings to dose the plant. Effluent is discharged via a small village sewage works into a tiny stream.

Microprocessor controls automatically regulate the pumping and treatment of leachate from up to 12 separate tipping cells, to meet the high effluent standards required.

Compton Bassett LTP was the first of two leachate treatment plants we undertook for Wiltshire County Council. The second Wiltshire CC plant was the similar Chapel Farm leachate treatment plant. We have often completed later projects for the same client.

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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