Impact of milling techniques on the particle size distribution pattern of turmeric powder
Journal of Food Science and Technology
Agro Processing Division, Central Institute of Agricultural Engineering, Nabibagh, Berasia Road, Bhopal-462 038, India; Department of Food Science and Technology, Federal University of Technology, Akure, Nigeria
Turmeric (Curcuma longa Roxb) powder (TP) was prepared by milling turmeric rhizomes using pulverizer mill, burr mill and home grinder. The TP obtained from each machine was analyzed for particle size distribution using a particle size analyzer with laser distraction to study the effect of each milling technique on the particle size of TP. Standard percentile diameter D (v, 0.5), D (v, 0.1) and D (v, 0.9) for samples obtained from the pulverizer mill, burr mill and home grinder were 270.41μm, 109.48 μm and 511.67 μm; 310.23 UMn, 121.74 μm; and 607.42 μm; 391.56 μm, 132.12 μm, and 682.78 μm, respectively. Volume mean diameter [D 4, 3] was more (312.77 μm) for home grinder milled TP sample compared to 216.42 μm; for burr milled and 199.71 μm; for pulverizer milled TP. Surface area mean diameter [D 3, 2] was also higher (197.43 μm) for home grinder milled TP samples compared to other milled samples. The specific surface area (Aw) for pulverizer milled TP sample was highest (0.0367 m 2/g), followed by burr milled (0.0311 m 2/g and home grinder (0.0298 m 2/g) TP sample. Pulverizer milled TP was finer compared to burr milled and home grinder as indicated by standard deviation value of pulverized mill (0,155), home grinder (0.054) and burr mill (0.086). There was significant difference (p≤0.05) in particle size distribution of TP prepared employing various milling techniques.
Grain size and shape; Grinding (machining); Grinding machines; Milling (machining); Particle size; Particle size analysis; Powders; Size distribution; Standards; Curcuma longa; Mean diameter; Milling technique; Particle size analyzer; Particle size distribution; Specific surface area; Specific surface areas; Surface area; Surface area moment mean; Turmeric powder; Volume mean diameter; Volume moment mean; Grinding mills; Curcuma longa