Published October 10, 2012, 12:00 AM

Reverse-osmosis treatment system


PolyMet Mining Co. on Wednesday announced it has successfully tested a new reverse-osmosis treatment system that removes sulfate from water. PolyMet said the system was developed between GE Water & Process Technologies and Barr Engineering. (PolyMet photo)
Read the article: PolyMet says new sulfate removal system works
Read the article: PolyMet touts environmental advances