Application of (super)cavitation

date: 19.03.2020

category: Sporočila za javnost

 

The team of Prof. Dr. Matevž Dular, recipient of a prestigious ERC grant, is engaged in research on the effects of cavitation, acoustics, hydrodynamics and supercavitation. Until recently, cavitation was associated only with the negative effects it causes on hydraulic machines, e.g. water turbines. Today it is associated with wastewater treatment, chemical synthesis, destruction of microorganisms and viruses, formation of nanoparticles and degradation of organic compounds. We are also investigating some of these effects in Laboratory for Water and Turbine Machines (LVTS ).

In the renowned journal Ultrasonics Sonochemistry (IF: 7,279), research papers have recently been published describing the positive effects of cavitation on process waters from the paper industry, where the microorganisms present in the process waters are a major problem as they affect paper quality. To solve this problem, they consume large quantities of chemicals, which causes enormous costs for the industry and increases environmental pollution. The results of the study showed that one type of hydrodynamic cavitation, supercavitation, effectively reduces the amount of aerobic and anaerobic bacteria, yeasts and bacterial spores in the process water of the paper. The hydrodynamic cavitation rotation generator developed at LVTS has also proven to be more economical than other cavitation devices available on the market. Due to the formation and collapse of vapour bubbles during cavitation, large amounts of energy are transferred to the liquid, causing the mechanical and chemical effects of cavitation. Because of the way cavitation works during the process, it is not necessary to add chemicals to kill the microorganisms. This research is very important as it can help reduce costs in the paper industry without harming the environment.

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