Mine wastewater has a very low pH making life difficult to survive. Chlorella algae thrives in low PH's and would be an ideal species for bioreactions in mining. Chlorella is a single-celled micro alga with the potential for absorbing heavy metals, as it has been discovered growing in some waste ponds on mine sites already.
Reilly, Kori; Conrady, Sam; Kyle, Stacey; and Zodrow, Katherine R., "Heavy Metal Removal via Phycoremediation" (2020). TECHxpo 2015, 2016, 2020. 12.