An example of a leachate treatment plant

2 Responses to “Landfills Leachate – 3 Things All Landfill Operators Will Wish to Avoid”

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  1. We have monitored and drawn-down our leachate levels, but still have persistent leachate breakouts. Any ideas?

    • Steve Last

      Simon: This will almost certainly be due to small quantity of leachate perched above a lower permeability horizon. Permeability contrast horizons which trap leachate and cause it to migrate sideways and create breakouts, are present in the waste of all landfills. They may be created by temporary cover not removed before more waste is placed above, and even by areas which have been compacted by vehicle movements.

      If the local environmental regulator will permit you to remove the capping material and create a “soakaway” in permeable stone around the breakout which will allow the breakout leachate to cease putting a pressure below the capping material and drain downward through the waste, that can be an effective solution.

      However, they will not always allow that and at times I have been forced to lay french drains below the cap to lead the leachate from the breakout location to a leachate well or perimeter drain.

      This can end up being quite costly to do. If it will help you I can always discuss this with the regulator [Uk] for you. Just fill in an LTP Plant Quote request and I’ll get back to you.

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