Application of Design of Experiments to Homemade Yogurt Production Process

Authors

  • Saeid Hakimi Department of Mechanical Engineering, Technology University of Malaysia, Johor Bahru, Malaysia
  • Jafri Mohd. Rohani Department of Mechanical Engineering, Technology University of Malaysia, Johor Bahru, Malaysia
  • Mona Hemmatboland Department of Mechanical Engineering, Technology University of Malaysia, Johor Bahru, Malaysia

DOI:

https://doi.org/10.11113/jt.v68.2991

Keywords:

Design of experiments, homemade yogurt, pH, response optimizer, case study

Abstract

Design of Experiments (DOE) is a necessary component of product development and improvement, and prepares a scientific approach to evaluation and optimization of experimental factors. This study presents the application of DOE to homemade yogurt production process in order to detect the critical process factors which influence pH values of homemade yogurt and identify the optimal setting for these effective factors. Homemade yogurt were made by changing two different levels of skim milk powder, inoculation temperature, incubation temperature, incubation time, and fat to investigate main and interactions effects on pH of the fermented milk and achieve the optimal pH value from customer prospective in the range of 4.2 to 4.6. The results demonstrated that incubation time and fat are the most effective factors on pH development and the optimal settings for these factors should be 43200 seconds (12 hours) for the incubation time and 17.83 (g/kg) for the fat.

References

Teles, C. D., S. H. Flores. 2007. The Influence of Additives on the Rheological and Sensory Properties of Nonfat Yogurt. International Journal of Dairy Technology. 60(4): 270–276.

Soukoulis, C., P. Panagiotidis, R. Koureli, and C. Tzia. 2007. Industrial Yogurt Manufacture: Monitoring of Fermentation Process and Improvement of Final Product Quality. Journal of Dairy Science. 90(6): 2641–2654.

Kristo, E., C.G. Biliaderisb, N. Tzanetakis.2003. Modelling of the Acidification Process and Rheological Properties of Milk Fermented with a Yogurt Starter Culture Using Response Surface Methodology. Food Chemistry. 83(3): 437–446.

Gün, Ö., and N. D. Isıklı. 2006. The Effects of Fat and Non Fat Dry Matter Concentration and Storage Time on the Physical Properties and Acidity of Yoghurts Made with Probiotic Cultures. Food Science and Technology International. 12(6): 467–476.

Bitaraf, M. S., F. Khodaiyan, M. A. Mohammadifar, and S. M. Mousavi. 2010. Application of Response Surface Methodology to Improve Fermentation Time and Rheological Properties of Probiotic Yogurt Containing Lactobacillus reuteri. Food Bioprocess Technol. 5(4): 1394–1401.

Lee, W. J., and J. A. Lucey. 2004. Rheological Properties, Whey Separation, and Microstructure in Set-Style Yogurt: Effects of Heating Temperature and Incubation Temperature. Journal of Texture Studies. 34: 515–536.

Chandan R. C., C. H. White, A. Kilara, Y. H. Hui. 2006. Manufacturing Yogurt and Fermented Milks. Blackwell Publishing

Willenberg, B. J., K. V. Hughes, and L. Konstant. 1993. Making Yogurt at Home: Country Living Series. Department of Food Science and Human Nutrition, University of Missouri. Web access only(http://extension.missouri.edu/p/GH1183.

Shaker, R.R., Jumah, R.Y., and Abu-Jdayil B., 2000. Reological Properties of Plain Yoghurt During Coagulation Process: Impact of Fat Content and Preheat Treatment of Milk. J. Food Eng. 44: 175–180.

Mahdian, E., and Tehrani, M, 2007. Evaluation the Effect of Milk Total Solids on the Relationship Between Growth and Activity of Starter Cultures and Quality of Concentrated Yoghurt. American-Eurasian J. Agric. & Environ. Sci. 2(5): 587–592.

De Brabandere, AG, De Baerdemaeker, JG, 1999. E€ects of Process Conditions on the Ph Development During Yogurt Fermentation. Journal. Food Engineering. 41(3) (4): 221–227.

Gac, A., Atkinson, J.K., Zhang, Z., Sexton, C.J., Lewis, S.M., Please, C.P. and Sion, R. 2004. Investigation of the Fabrication Parameters of Thick Film Titanium oxide-PVC pH Electrodes Using Experimental Designs. Microelectronics International. 21(3): 44–53.

Lin, T. and Chananda, B. 2004. Quality Improvement of an Injection-Molded Product Using Design of Experiments: A Case Study. Quality Engineering. 16(1): 99–104.

Zalba, B., Bele´n, S. and Marı´n, J. M. 2005. An Experimental Study of Thermal Energy Storage With Phase Change Materials by Design of Experiments. J. of Applied Statistics. 32 (4): 321–32.

Chao, P. Y. and Hwang, Y. D. 1997. An Improved Taguchi’s Method in Design of Experiments for Milling CFRP Composite. Inter. J. of Production Research. 35(1): 51–66.

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Published

2014-05-15

How to Cite

Hakimi, S., Mohd. Rohani, J., & Hemmatboland, M. (2014). Application of Design of Experiments to Homemade Yogurt Production Process. Jurnal Teknologi, 68(4). https://doi.org/10.11113/jt.v68.2991