Making ozone systems more efficient with hydrodynamic cavitation

Voltek’s advanced oxidation system uses hydrodynamic cavitation to increase the mixing of ozone with water by orders of magnitude, providing high availability of oxidation radicals for disinfection and organics destruction.

Ozone is a powerful oxidant used in industrial wastewater treatment to meet discharge limits for Chemical Oxidation Demand (COD) and Biological Oxidation Demand (BOD). However, ozone gas has very low solubility in water, so traditional ozone generation equipment must be oversized to provide enough ozone for COD destruction. Voltek’s advanced oxidation system provides effective disinfection with far less ozone.

Hydrodynamic cavitation

Hydrodynamic cavitation is a process intensification technique that is orders of magnitude more energy efficient in producing physical and chemical transformations, compared with other process techniques.

How hydrodynamic cavitation works

The hydrodynamic cavitation system passes liquid waste through specially-designed orifice structures that create a turbulent pressure field resulting in nanometer-sized cavitation bubbles. These cavitation bubbles generate intense temperatures and pressures when they expand and implode, forming highly reactive free radicals, and changing the solid/liquid/gas constituents of the fluid.

Increasing anaerobic digestion efficiency

Voltek’s anaerobic digestion pretreatment system passes digester slurries with high organic content (especially food wastes) through a hydrodynamic cavitation process that allows microbes to better penetrate cell walls and do their job. This pretreatment can increase the rate of digestion by 40-70%, effectively speeding up the digestion time and allowing for smaller tanks and lagoon requirements.