Australian team uses electricity to clean up industrial wastewater

The group’s electrochemical oxidation process involves treating wastewater with electricity using specialised electrodes.

These electrodes discharge electricity, then drive oxidation reactions near the electrode surfaces, transforming the organic contaminants into harmless gasses, ions or minerals.

A study published in the journal Algal Research describes how the technology was trialled on a sample of wastewater containing carbon, nitrogen and phosphorus that was generated in a pilot biofuel production plant.

"We have employed an incredibly powerful process that eliminates even the most persistent non-biodegradable pollutants, such as pharmaceuticals and pesticides, as well as various classes of organic compounds that can be found in many industrial effluents," explained researcher Julia Ciarlini Jungers Soares.

The process – which is claimed to be relatively simple - doesn’t require the addition of chemicals or severe operational conditions, and does not produce additional waste streams, added Soares.

The group claims that the method could be readily applied to a wide range of industries that must comply with strict regulations for industrial wastewater disposal, such as pulp and paper processing, wineries, as well as pharmaceutical production facilities.