Final Drying of Whole Milk Powder in Vibrated-Fluidized Beds

Abstract

Vibro-fluidized beds are widely used in drying sticky powders and agglomerated materials as milk powder. Using a vibro-fluidized laboratory scale dryer, this work is aiming at analyzing preliminarily the effect of its operational variables on the drying kinetics and characteristics of whole milk powder. The full-factorial design technique with three replications at the central point has been employed to generate data and correlations to quantify the effect of inlet air temperature, air flow rate, and vibration bed amplitude on the drying curves and the milk powder properties related to its faster reconstitution in water (as tapped density, Hausner cohesion ratio, agglomerate size distribution, and internal pore concentration). Results obtained are analyzed and discussed to identify the adequate operation condition for final drying whole milk powder in vibrofluidized beds, assuring a high product quality.

Comparative studies on the effect of mineral matter on physico-chemical properties, inherent moisture and drying kinetics of Chinese lignite

“…Meanwhile, the moisture was gradually evaporated until the moisture approached to the critical moisture content. These similar drying processes were also reported in both the drying of coal and of other solids [44,45]. Moreover, as increasing the inlet temperature, the evaporation process was accelerated and the drying times reduced.…”

Effect of different fat replacers and drying methods on thermal behaviour, morphology and sensory attributes of reduced-fat coffee creamer

“…flowability, density, dissolution, and dispersion characteristics) of powder, thereby reducing the tendency of powder to caking (Mukherjee & Bhattacharya, 2006). Cruz, Passos, and Ferreira (2005) also reported that the moisture content of the whole milk and skim milk powders was decreased from 6-7%-3% and 4% by applying the fluidized bed drying.…”

Surface composition of industrial spray-dried milk powders. 1. Development of surface composition during manufacture

“…The wet concentrate droplets collide with the fines and stick together, forming larger, irregular shaped ''agglomerates". After drying and cooling in the vibrating fluidized bed(s), the powder is then conveyed to packaging operations and is stored until its end use (Pearce;Singh and Newstead, 1992;Cruz et al, 2005).…”