Application of biochar for minewater remediation: Effect of scaling up production on performance under laboratory and field conditions

•Investigates the real world application of biochar for the treatment of minewater.•Presents results from field testing and bulk production of biochar.•Provides information on the scalability of the technology.•Provides the first known comparison between real and synthetic minewaters.•Calculates the amount of biochar and feedstock required to remediate a minewater.