Algae-based technologies for improved environmental outcomes and sustainable post-mining futures

The Challenge 

Mining activities in Western Australia can result in severe environmental impacts due to the removal of vegetation and topsoil, generation of large volumes of mine wastes and toxic mine drainage and process effluents. Acid mine drainage (AMD) can originate from ore, waste rock piles, tailings, pit walls and underground workings, as sulfidic minerals are oxidised when exposed to air and water. Depending on mineralogy and a combination of physical, chemical biological factors, AMD may contain sulphate, selenate, uranium, metals, salts and acidity. 

Proposed Solution 

Many mine sites in Western Australia have water that could be used to grow algal biomass for CO2 biosequestration, acid mine drainage prevention and treatment, and enhancing the growth of plants during mine site rehabilitation and creation of bio-based supply chains for business solutions that can benefit local communities and support sustainable use of mine sites. 

Proposed Benefits to WA 

The algal technologies evaluated in the project are expected to deliver the following impacts and benefits for Western Australia: 

Economic benefits to mining industry and government responsible for legacy mine sites: 

Social benefits to local communities: 

Environmental benefits.