A pilot plant scale of Yellow Konjac (Amorphophallus muelleri Blume) flour production by a centrifugal mill using response surface methodology


  • Jatmiko Eko Witoyo Universitas Brawijaya, Faculty of Agricultural Technology, Doctoral degree of Agroindustrial Technology, Jalan Veteran, 65145, Malang, Indonesia, Tel: +6282141185841 https://orcid.org/0000-0003-2408-0618
  • Bambang Dwi Argo Universitas Brawijaya, Faculty of Agricultural Technology, Department of Agricultural Engineering, Jalan Veteran, 65145, Malang, Indonesia, Tel: +628123210465 https://orcid.org/0000-0002-3334-9546
  • Sudarminto Setyo Yuwono Universitas Brawijaya, Faculty of Agricultural Technology, Department of Agricultural Product Technology, Jalan Veteran, 65145, Malang, Indonesia, Tel: +6281931891954
  • Simon Bambang Widjanarko Universitas Brawijaya, Faculty of Agricultural Technology, Department of Agricultural Product Technology, Jalan Veteran, 65145, Malang, Indonesia, Tel: +628123388005 https://orcid.org/0000-0001-5533-6220




Centrifugal mill, polishing, Amorphophallus muelleri Blume, Response Surface Methodology


This study aimed at investigating the effects of polishing conditions on the physicochemical properties of polished yellow konjac flour (PYKF) with a centrifugal mill using Central Composite Design-Response Surface Methodology (CCD-RSM). Micro-mill milled yellow konjac flour (MMYKF) mass and polishing cycles were the independent variables, with four observed responses (calcium oxalate, viscosity, degree of whiteness (DoW), and glucomannan). The lower limit (-1) and upper limit (+1) for MMYKF mass in this study are 10 and 15 kg, respectively, while the -1 and +1 for the polishing cycle are three times, and seven times, respectively. The optimum prediction occurred at 10 kg of MMYKF mass and six times the polishing cycle with the following characteristics: 0.52 ±0.00% w.b. calcium oxalate, 20362.00 ±16.00 cP viscosity, 62.22 ±0.01 DoW, and 69.43 ±0.02% d.b. glucomannan content, which agreed with the verification data with p-value >0.05 for all observed responses using the paired T-test. Polishing using a centrifugal mill is feasible and promises to be scaled up to industrial scale for yellow konjac flour polishing before the wet extraction process. 


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How to Cite

Witoyo, J. E., Argo, B. D. ., Yuwono, S. S., & Widjanarko, S. B. (2021). A pilot plant scale of Yellow Konjac (Amorphophallus muelleri Blume) flour production by a centrifugal mill using response surface methodology. Potravinarstvo Slovak Journal of Food Sciences, 15, 199–209. https://doi.org/10.5219/1455