Immobilisation to Treat Waste

Immobilisation to Treat Waste

Our client manages the treatment of multiple hazardous waste streams. When treating these waste streams certain by-products (ash and fly ash) are produced. In order to compliantly dispose of the ash waste by-product, we must assess and treat the heavy metal and organic contamination within the waste.

The treatment involves reducing the leachability of the heavy metals and organic compounds within the ash waste product. As our client undertakes the treatment of a batch of waste at their facility, unique contaminants and characteristics arise from each batch of ash by-product generated. The combination of heavy metals and organic compounds that are present and unique to each batch of waste mean our project team has to individually tailor a solution for each contaminant and adjust the reagent application accordingly.

From undertaking an initial classification, baseline data gathering, consistent tweaking of potential remedial reagent applications, and hot spot segregation we are managing to immobilise a particularly intractable waste whilst saving our client considerable expenditure on disposal costs.

We pride ourselves on repeatedly working to make sure our treatment methodologies are managed in a way that allows for transparency and repeatability.


  • 236.8 tonnes of immobilised (treated) fly ash waste safely disposed of.
  • Contaminants immobilised include; antimony, cadmium, copper, lead, bis(2-ethylhexyl) phthalate, mercury, nickel and selenium.
  • Complete each individual treatment event in 4 months – (from treatment trial design and baseline data collection to EPA desingation and disposal)
3 months
Dandenong, Victoria
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