Landfill Leachate Treatment

The management of water produced from within new and old landfill sites (leachate) can present a significant and costly challenge for many government authorities.

It typically contains a mixture of various contaminants such as biodegradable and non-biodegradable organics, heavy metals, ammonia, and salt, with flows and concentrations that vary throughout the year.   No site is exactly the same which makes it difficult to simply apply an “off the shelf” wastewater treatment solutions.  Instead, effective treatment solutions usually need to incorporate multiple process steps that are designed specifically around the particularly characteristics of a leachate and a site.

The advantage of the Water and Carbon team is that we are able to draw on a wide range of proven technologies from engineered bioreactors, high surface area trickling filter, chemical systems to vegetated gravel filters and wetlands.  Having access to a mix of traditional engineering and ecological processes allows us to optimally match the treatment train to the wastewater composition; the exact selection and mix of processes used will ultimately be determined by the final water quality that needs to be achieved.  We also have skillset to integrate the treatment with a sustainable disposal solution, such as an irrigation forest.

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We are confident that the breadth of options that we have at our disposal allows us to provide our clients with competitive solutions that have numerous benefits, including:

  • A lower whole of life cost than equivalent performing solutions available on the market;
  • Lower energy requirements;
  • Robustness to handle variable flows and effluent quality;
  • Less operational complexity: mechanical components are minimised;
  • Reduced waste streams; particularly compared against solutions using Reverse Osmosis technology, which produce 10-30% of the flow as a waste stream;
  • A suite of process options that utilise multiple treatment mechanisms: Biological, Chemical and Physical, thereby offering process solutions that are capable treating different contaminant groups;
  • The use of biological process technologies that detoxify ammonia, rather than off-gassing it to atmosphere or concentrating it into another waste stream (as is done with RO), and;
  •  Achieves a higher sustainability profile; Low Carbon Footprint.