Biological in-situ groundwater remediation

The pumped water is aerated with ambient air in a storage tank to accelerate oxidation processes. Subsequently, suspended solids and precipitated iron are cleaned via a gravel filter. Via a motor control valve in conjunction with magnetic-inductive flow meters, a division into two partial volume flows "Infiltration" and "cleaning" takes place. To hydraulically secure the rehabilitation area, 10 to 20% of the delivery volume is cleaned via activated carbon via the volume flow "Cleaning" and then dumped into the sewage sewer. Hydrogen peroxide and nitrate/phosphate are metered into the "Infiltration" sub stream, depending on the volume flow. The water is then returned to the aquifer via the 14 infiltration wells, all of which can be connected or disconnected separately via solenoid valves.