The University of Newcastle, Australia

Emerging Persistent Contaminants, Hydrocarbons and Heavy Metal Contaminations

Ozofractionative Catalyzed Reagent Addition (OCRA) is a process in which ozone microbubbles are sparged through EPCimpacted water to facilitate gas-liquid interface partitioning of dissolved EPCs into a foam fraction. The low volume of concentrate can then be destroyed. Our research is focused on optimisation and source speciation.

Competitive advantage

  • Extremely effective in the presence of co-contaminations, including hydrocarbons, chemical oxygen demand (COD), biochemical oxygen demand (BOD), total suspended solids (TSS) and metals
  • Reduces impacted volume to as low as 0.02 per cent of original volume without creating impacted media
  • Does not require pre-treatment stage
  • Can handle up to 20 per cent solids in feed
  • Manages highly variable flow and load rates

Successful applications of research

  • Brisbane Airport polyfluoroalkyl substances (PFAS) spill: 20 millilitres of highly impacted sewer, surface, estuarine and groundwater treated to compliance
  • Hobart Hot Fire Training Ground water treatment: 25,000-litres-per-day plant deployed to produce less than 0.01μg-per-litre sum of PFAS
  • MMG Rosebery Mine: treating up to 65 kilolitres per day of acid mine drainage (AMD), reducing reagent use by 74 per cent
  • Collinsville AMD: reducing reagent use by 70 per cent

Partners

  • Evocra

Impact

  • Creating a paradigm shift in water treatment flow sheets
  • Enables EPC management strategies to be implemented as an inexpensive add-on in established water treatment
  • Drastically reduces impacted media from treating EPCs, with up to three orders of magnitude less media required

Capabilities and facilities

  • Laboratory pilot-scale abilities up to 6,000 litres per day
  • Field pilot-scale abilities up to 25 kilolitres per day

Further reading on: Material Sciences and Manufacturing