Treating PFAS Across All Waste Streams

Treating PFAS Across All Waste Streams

Having successfully treated over two billion litres of PFAS impacted waters, managed over one million tonnes of PFAS contaminated soils, thermally destroyed more than 300,000 tonnes of PFAS impacted material – our team is more than equipped to treat, destroy and safely manage PFAS across all waste streams, including soil, water, sludge, concentrate, filter media, concrete and biosolids. 

Add to that, we can offer regulatory certainty which benefits in minimising client risk. Ben Kay, our National Innovation Manager, states, “Our key market differentiator is our proven experience in applying established technologies to manage the full suite of PFAS impacted materials, as well as providing new, patent-pending, PFAS-treatment technology solutions.”

Our holistic approach is based on ensuring: –

  • effective treatment performance that achieves regulatory requirements
  • treatment approach is proven, robust and repeatable
  • treatment assets are appropriately sized to handle the anticipated waste volumes generated during construction; and
  • a ‘Whole of Life’ solution that encompasses a clear chain of custody process.

Ben says, “In addition to our more traditional and proven technologies, we offer several unique market-leading treatment innovations for PFAS, developed to reduce treatment costs and fill gaps in the market.”

Our Unique PFAS Treatment Solutions

DeFAS – utilises concentration, desorption and destruction as our PFAS filtration, remediation and destruction technology for PFAS impacted water.

This allows the closed loop treatment of PFAS contaminated water on site including:
– reduction of PFAS in water to super ultra-trace limits,
– destruction of the PFAS molecule, and
– continued regeneration and reuse of the adsorbent media,
substantially reducing the costly offsite disposal of PFAS impacted spent media and improving project sustainability and operational efficiencies.

EnviroPass® – is our passive PFAS surface water treatment system designed for large-scale sites where low levels of PFAS have been detected in surface waters and runoff. This system will intercept PFAS migration pathways and reduce off-site PFAS impacts with minimal ongoing maintenance, providing a significant cost reduction when compared to alternate methods such as pump and treat.

In-Situ PFAS Soil Treatment Technology – allows a rapid and cost-effective solution for large PFAS source area sites. It utilises the established techniques of PFAS chemical immobilisation in combination with high productivities achieved through soil stabiliser methodologies. A variety of EnviroLock® reagents can also be added to provide a simultaneous improvement in geotechnical properties to create low permeability and/or high strength capping layer, achieving productivities of up to 8,000m2 per day and down to depths of 0.5m, 3-4 times higher than standard ex-situ treatment processes.

EnviroLock­­® is our dynamic catalogue of the most cost-effective, best-performing reagents in the market, chosen on their ability reduce solid contaminant concentrations, reduce contaminant leachabilities, and remove (concentrate) contaminants into the chosen filtration media. Our catalogue removes the guess work for clients without limiting the available reagent options, ultimately providing the best-value solution to our clients.

Traditional PFAS Treatment Methods

PFAS Impacted Soils and Solid Wastes

Thermal Treatment

Has the main benefit of achieving an immediate reduction in legacy risks associated with PFAS by physically destroying the PFAS molecules and converting safely to fluoride and carbon dioxide. Once PFAS has been removed, the waste is beneficially applied in a range of end-uses including construction materials and landfill rehabilitation, providing a more sustainable solution with a greater environmental outcome.

Recent expansions to our SOLVE facility have increased capacity such that it is the only thermal facility in Australia with the capability to treat in excess of 100,000 tonnes of solid waste per annum.

Chemical Immobilisation/Stabilisation

Offers a well-established, broadly accepted option for treatment of PFAS impacted solid wastes to facilitate onsite reuse or containment, or offsite landfill disposal with limited environmental risk due to the reduction in leachability of PFAS.

Jason Cole, our Project Director QLD/NT/WA, explains, “We use a range of stringent laboratory techniques such as Toxicity Characteristic Leaching Procedure (TCLP), Total Oxidisable Precursor (TOP) Assay, Multiple Extraction Procedures (MEP) and emerging industry techniques to measure and track the long-term stability of successfully immobilised PFAS impacted soils. This testing simulates the leaching of PFAS through extreme environmental conditions and confirms the long-term effectiveness of the stabilisation treatment.”

We also own and operate specialist remediation equipment proven to be capable of treating PFAS on site, including our own EPA compliant mobile high shear soil treatment plant. We have successfully achieved treatment productivities in excess of 2,000 tonnes a day.

Containment Cells

Containment of PFAS impacted solid waste can be undertaken through engineered repositories, or via a ‘cap and contain’ approach.

We have constructed purpose-built PFAS repositories, as well as the capping and containment of PFAS impacted materials across all jurisdictions. Through our capping and containment projects we have delivered project savings by identifying site-won material to utilise as capping, providing significant efficiencies and sustainable outcomes by limiting the requirement to import materials to site.

Jason states, “Containment can be a particularly feasible option for clients who are managing very large volumes of material or may be located a significant distance away from an alternative treatment solution.”

Soil Washing 

Is a remediation process which focusses on the aggregation of contaminants into fines (clays/silts) to produce recoverable materials such as sand and gravels. This allows the secondary treatment of the consolidated and concentrated PFAS materials, with beneficial reuse of the majority cleaner products.

We have undertaken significant soil washing projects around Australia and utilised our broad set of skills in the civil, water and remediation industries to manage all phases of the treatment approach.

PFAS Impacted Water

Mobile PFAS Water Treatment Plants

We own and operate a range of licensed mobile PFAS water treatment plants allowing us to expedite approvals and mobilise without delays. Modular, scalable and rapidly deployable to anywhere in the country, our PFAS water treatment plants are designed, engineered and built to Australian Standards and are guaranteed to achieve PFAS removal to the most stringent criteria reporting limits set by relevant regulatory authorities.

Tom O’ Callaghan, Regional Water Manager – VIC, TAS, SA, states, “Our PFAS water treatment systems can remove both short and long chain PFAS impurities in a single pass and can be designed to operate for up to 12 months before requiring filter media replacement or regeneration.”

PFAS Impacted Sludges

Non Destructive Digging Plant

PFAS impacted sludges can exist as either slurry material residing in the base of dams, sludge generated as part of water treatment processes or via non-destructive drilling (NDD) waste. We own and operate both fixed and mobile NDD plants, providing the separation and treatment of NDD waste and sludges. Additionally, we provide isolated sludge management to support our clients needs for dewatering, as a separate technology from the mobile NDD plants.

Our mobile NDD plants are designed to recover the sand, gravel and clays for beneficial reuse, supporting diversion from landfill. Jasmine Stefanac, our Technical Sales Manager at SOLVE, explains, “The water recovered from the plant also has the potential to be beneficially reused and can be treated to any level, supporting the circular economy and helping reduce the site-based consumption of potable water. These systems have been used to successfully treat PFAS impacted NDD waste across a range of major infrastructure and aviation projects.”

Besides our mobile NDD plant, our fixed NDD plant at SOLVE is a high-tech component of SOLVE which specialises in treating PFAS and hydrocarbon impacted drill muds. This state-of-the-art plant provides an alternative to the landfill disposal of the NDD waste besides providing testing and compliance measures for the recovery of valuable outputs.

In conclusion, Enviropacific is your trusted partner in PFAS remediation. We offer a range of PFAS treatments both innovative and traditional and with unparalleled expertise, our team consistently achieves results that surpass regulatory requirements, ensuring effective and sustainable remediation.

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