Hydrodynamic Cavitation in Food and Fermentation Processing

11 Conclusions

When these principles are followed, hydrodynamic cavitation can replace, combine, or reduce several conventional operations. Its strongest commercial case is not cavitation intensity by itself, but a validated improvement in sellable yield, product functionality, safety, energy use, or production capacity at acceptable maintenance and quality risk. Future work should emphasize continuous sanitary systems, standardized reporting, independent replication, long duration erosion studies, and predictive scale out methods for viscous and multiphase foods.

Hydrodynamic cavitation is a versatile platform for food and fermentation processing because it couples flow acceleration, cavity dynamics, turbulence, interfacial renewal, and energy dissipation. Beer and corn ethanol applications use extraction, particle opening, and increased starch accessibility. Juice and dairy applications use stabilization, homogenization, and combined thermal and mechanical treatment. Egg, ice cream, mayonnaise, and salad dressing applications use uniform heating, powder hydration, controlled protein modification, and emulsion structuring. Protein and bioproduct applications extend the same mechanisms to extraction, cell disruption, and controlled bubble formation.

Literature also establishes clear limits. Microbial reduction is often modest unless cavitation is combined with temperature, gas, pressure holding, or another validated hurdle. Enzyme inactivation can lag behind physical stabilization. Excess treatment can degrade vitamins, flavor, foaming behavior, fermentation performance, or separation efficiency. Research findings, patents, and manufacturer application sheets provide useful mechanisms and starting conditions, but they do not replace product specific regulatory validation, sanitary design review, or an independent plant trial [56-62].

The most reliable design philosophy is product first and measurement intensive. Device geometry, pressure, flow, pass frequency, residence time distribution, temperature, energy, rheology, gas content, and product response must be reported together. Scale up should preserve the mechanism that controls the endpoint and may favor parallel validated modules instead of one enlarged reactor. Commercial assessment must use matched system boundaries and include pumping, cooling, cleaning, wear, downstream separation, enzyme use, yield, product quality, and plant capacity.