Bilek F.,Groundwater Research Center Dresden |
Wagner S.,Groundwater Research Center Dresden
IAHS-AISH Publication | Year: 2011
Autotrophic sulfate reduction in a technical in situ reactor is evaluated to remediate mining impacted groundwaters. Complete metal precipitation and sulfate removal below 2-4 raM is performed in three steps: (1) iron sulfide precipitation, (2) sulfate reduction, (3) excess sulfide stripping and sulfide reoxidation. High amounts of alkalinity can be transferred to the treated water. The reactor system has run stable for 3 years. It is adjustable to a wide range of raw water quality and is ready to be transferred to the field. The demand of H 2 as e-donator and CO 2 as pH-controlling species is dependant on the three parameters c(Fe), c(SO 4) and c(Fe)/c(SO 4). Copyright © 2011 IAHS Press.