Specialists of Tomsk Polytechnic University created a nanosecond high-voltage generator for the Israeli company WADIS, engaged in electric-disinfection of water. The TPU researchers found an original engineering solution for a challenging issue. In the future, the generator will be used in wastewater treatment.
It was developed in the TPU Laboratory for Pulse-Beam, Electric Discharge and Plasma Technologies, headed by Prof. Gennady Remnev. Recently, the generator has been shipped to Israel.
Such generators are actively used in ozonizers, which generate ozone for air and water purification. The generator is one of the main elements of the ozonizer. It is a source of high-voltage nanosecond pulses initiating discharge which generates a large amount of ozone. This generator is planned to be used for fine and chemical-free purification of water from organic compounds.
“Our Israeli colleagues are testing the most effective technology for wastewater treatment. One of the cleaning stages includes removal of organics. This is always a challenge. They use a nanosecond electric discharge in water and they need a generator for this goal. Testing of their technology demonstrates good results. However, they need to increase the device capacity to its further industrial application. Therefore, the company contacted us. Typically, such generators produce high-voltage pulses with a repetition rate of up to 1 kHz with the average power of 0.5-1 kW, and we needed to reach 3 kHz with the average generator power of 4.5 kW. Along with this, it should have worked at a load of 50 Ohms. It is a relatively low resistance for this type of generator. The issue is that along with the resistance decrease, the generator's efficiency also decreases. We managed to solve this issue in our generator while maintaining an acceptable efficiency” – says Mikhail Zhuravlev, a researcher of the Laboratory for Pulse-Beam, Electric Discharge and Plasma Technologies.
The TPU research team succeeded to solve this issue due to the original design solutions implemented in the generator.
“It was a really challenging task. The generator is an original device, designed for a specific task. Moreover, it is the first one with such low resistance we have ever developed” - Mikhail Zhuravlev says.
Another demand of the Israeli partners was to make the generator capable to work 24/7. Testing in Israel demonstrated that it coped with this task as well.