Blanching efficiency

Bouchez, M., Blanche , D., Bardin, V., Haeseler, F. Vandecasteele, J.-P. (1999). Efficiency of defined strains and of soil consortia in the biodegradation of polycyclic aromatic hydrocarbon (PAH) mixtures. Biodegradation, 10, 429-35. 

Prince and Blanch [92] modeled bubble coalescence in bubble columns considering bubble collisions due to turbulence, buoyancy, and laminar shear, and by analysis of the coalescence probability (efficiency) of collisions. It was assumed that the collisions from the various mechanisms are cumulative. The collision density resulting from turbulent motion was expressed as a function of bubble size, concentration and velocity in accordance with the work of Smoluchowski [111] ... 

In addition, as distinct from the approach of Prince and Blanch [92], Kolev [46] (p 174) argued that the frequency of coalescence of bubbles should rather be determined having individual efficiencies ... 

The prevalence of water blanchers in the industry necessitates the comparison of different types of blanching for their energy utilization. On the basis of a theoretical requirement of 134 kg of steam per 10 kg of raw vegetables, energy efficiency of a steam blancher was estimated at 5%, a hydrostatic steam blancher at 27%, an IQB unit at 85%, and a water blancher at 60% [10]. 

Prince and Blanch [102] further postulated that bubble breakage is a result of collisions between particles and turbulent eddies, and that the collision rate can be calculated following arguments from the kinetic theory of gases. A total breakage rate for particles of size di, with units (1/sm ), was thus expressed as a product of an eddy-bubble collision rate o sidi j) and a breakage probability (efficiency) psidi Xj), thus ... 

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