Abstract

Membrane technologies are capable of assisting in the treatment of AMD minewaters to produce clean permate for reuse onsite and the concentrate stream can be used for the recovery of precious metals. Due to the harsh feed conditions associated with AMD waters rapid scaling and fouling can occur. In this mini review the authors have discussed the potential for scaling and fouling, particularly CaSO₄ (gypsum) scale and have presented methods to prevent this using good pre-treatment and frequent cleaning. Genmine AS26 was developed as a low-pH specific antiscalant and Genmine C15 and Genmine C17 are cleaners used for the removal of CaSO₄ scale.

Keywords: Acid mine drainage; Gypsum; Reverse osmosis; Antiscalant; Membrane cleaning