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Optimization of Parameters in the Production of

Turmeric Powder Using a Hammer Mill-Type Pulverizer

 

Jose D. De Ramos1, Engelbert K. Peralta2, Kevin F. Yaptenco3, Delfin C. Suministrado4

and Marife R. Santiago5

ABSTRACT

The effect of moisture content, rotor blade tip speed and grinding screen perforation diameter on the      performance of a hammer mill-type pulverizer was studied.  One hundred sixty five kilograms of turmeric rhizomes were washed, sliced, dried to different moisture contents and ground by the pulverizer. The experiment used the Box-Behnken design and the parameters were optimized using the Surface      Response Methodology approach. 

ANOVA showed that all the control parameters significantly influenced the response variables input        grinding capacity, grinding recovery, and overall average particle diameter. Input grinding capacity         decreased as moisture increased from 5% to 15%, increased at high RBTS and large SPD.  Blade tip speed played a significant role in the efficiency of grinding; recovery was high at high speeds (>35 m s-1).  The average particle sizes of the turmeric powder ranged from 0.449 to 1.10 mm. Second-order poly-nomial models were developed to predict responses for different control variable settings.  Optimum machine performance can be obtained at MC of 7.4%, RBTS of 49.1 m s-1 and SPD of 1.0 mm.  At these       settings, predicted values of grinding capacity, grinding recovery, and APD are 142.3 kg h-1, 100% and 0.494 mm, respectively.  End-user requirements for fine grinding and good machine performance can be obtained at these settings.

 

Keywords: hammer mill, optimization, box-behnken, surface response methodology, powder processing, pulverizer, turmeric

Abbreviations: APD – overall average particle diameter; MC – moisture content; RBTS – rotor blade tip speed; SPD – grinding screen perforation diameter

1University Extension Specialist III, Center for Agri-fisheries and Biosystems Mechanization, College of Engineering and Agro-Industrial Technology, University of the Philippines Los Baňos, 4031 College, Laguna, Philippines

2,3Professors, Agriculture and Bio-Process Division, Institute of Agricultural Engineering, College of Engineering and      Agro-Industrial Technology, University of the Philippines Los Baños, 4031 College, Laguna, Philippines

4Professor, Agricultural Machinery Division, Institute of Agricultural Engineering, College of Engineering and Agro-Industrial Technology, University of the Philippines Los Baños, 4031 College, Laguna, Philippines

5University Extension Specialist II, Center for Agri-fisheries and Biosystems Mechanization, College of Engineering and Agro-Industrial Technology, University of the Philippines Los Baños

Citation:

De Ramos, J.D., Peralta, E.K., Yaptenco, K.F., Suministrado, D.C. and Santiago, M.R. (2017). Optimization Parameters in the Production of Turmeric Powder Using a Hammer Mill-Type Pulverizer.  Philippine Journal of Agricultural and Biosystems Engineering, (13):3-15.