In the Oxidant reactor, a DBD generates a plasma using air as the carrier gas. Before treatment, the carrier gas and the sample liquid are mixed and then nebulized. The resulting reaction products include ozone, which can be used for the treatment of raw water. Hereby, a treatment of river water is possible, which can subsequently be used as a coolant in the industry. A treatment of cyanotoxins has already been successfully carried out.
The wINPlasLab is used to treat a liquid in a beaker with transient spark discharges. During the treatment, the beaker is placed underneath the electrodes, and by adjusting the liquid level in the beaker, the distance between the electrodes and the water surface can be set. An integrated magnetic stirrer provides permanent mixing of the sample substance, and the utilization of leakage transformers for the high-voltage supply provides an inductive current limitation. The system is intended for the treatment of various liquids with different conductivities.
The gas pressure is an effective parameter to control plasma-chemical reactions, but its adjustment often requires substantial effort. In the Venturi-DBD (VDBD), the pressure can be set to any value between 100 mbar and 1000 mbar reliably and reproducibly. Using a Venturi pump for vacuum generation ensures that the system is affordable and almost maintenance-free. With air as process gas, the output gas composition can seamlessly be adjusted from a strongly ozone-dominated regime to a nitrogen oxides-only-regime including nitric oxide.