Biomedy AG

Prj 9712 - Underground water decontamination at a Copper Mine Site - Case Study

0

Courtesy of Biomedy AG

Starting May 1997, on authorization from BHP Copper (Tucson, Arizona) a BIOREM lab test was performed on underground water from BHP Miami-Globe mining operation (Arizona). Samples consisted of contaminated underground water and some alluvial soil taken in the vicinity of the well.        

The soil made possible the set-up of two columns as in figure. From water and soil there were selected the indigenous sulfur reducing bacteria that were grown to critical mass for further injection into columns.

Column #1 was injected with biomass grown for 6 days while Column #2 was injected with biomass grown for 3 days that means that Column #1 was injected with biomass at higher concentration than Column #2. After a conditioning period (5 days), the polluted water was allowed to percolate upwards through the soil in the respective columns at different flow rates.

Chemical analysis of the contaminated water reported:

  • pH = 4.6
  • SO4-- = 2600 mg/l
  • Cu = 150 mg/l

The dynamic of remediation is immediately perceivable from figures below showing that BIOREM is an effective method for the decontamination of underground water from the Miami-Globe mining site. It was specifically noticed that:

  • BIOREM reduced SO4-- in the water from the initial 2600 mg/l down to 200 mg/l in 2 days (in the Column#1).
  • Copper concentration in the water was reduced from the initial 150 mg/l down to non-detectable level within 6 days.

Moreover it was confirmed that the degree of decontamination is directly related to the biomass level and to the water flow rate trough the alluvial soil

Customer comments

No comments were found for Prj 9712 - Underground water decontamination at a Copper Mine Site - Case Study. Be the first to comment!