Device and method for reducing the hydrogen peroxide and peracetic acid content in a water flow

摘要

The invention relates to a device comprising a measuring device for determining the flow rate of a water flow, a measuring device for determining the concentration of hydrogen peroxide in the water flow, a measuring device for determining the concentration of peracetic acid in the water flow, a metering device for metering a reducing agent into the water flow downstream of the measuring devices for the concentrations, and a control device which calculates a reducing agent quantity from the flow rate of the water flow, the concentration of hydrogen peroxide in the water flow, and the concentration of peracetic acid in the water flow in order to reduce the hydrogen peroxide and peracetic acid content to a desired value and which controls the metering device in order to meter the reducing agent. The device allows a reliable reduction of the hydrogen peroxide and peracetic acid content in a water flow. The device is suitable for reducing the hydrogen peroxide and peracetic acid content in a water flow that is removed from the ballast water tank of a ship.