Physical Properties of Extrudates Based on Corn Grit, Mocaf Flour and Gaplek Flour Using a Twin Screw Extruder with Treatment of Moisture Content and Barrel Temperature

Authors

  • Joko Nugroho Wahyu Karyadi Universitas Gadjah Mada http://orcid.org/0000-0001-9085-4103
  • Arifin Dwi Saputro Universitas Gadjah Mada http://orcid.org/0000-0002-8446-494X
  • Devi Yuni Susanti Universitas Gadjah Mada http://orcid.org/0000-0003-0517-9786
  • Dhyas Tanjung Prabowo Putri Universitas Gadjah Mada
  • Linggar Setianingrum Universitas Gadjah Mada
  • Rio Bagus Herlambang Universitas Gadjah Mada
  • Fahmi Baharudin Universitas Gadjah Mada
  • Ailsa Saraswati Samodra Universitas Gadjah Mada

DOI:

https://doi.org/10.23960/jtep-l.v14i3.732-743
Abstract View: 324

Abstract

Cassava is a commodity that has not been widely innovated on. Mocaf flour and gaplek flour can be innovated as snacks using extrusion technology. This study examined the effects of varying ratios of mocaf/gaplek flour to corn grits (0% / 10% / 20%), initial moisture content (14 / 16 / 18%), and barrel temperature (120 / 130 /140°C) on the physical properties of the extrudate and to characterize the physical properties of the extrudate using PCA analysis. Physical properties such as expansion ratio, particle density, moisture content, color (L and b*), water absorption index (WAI), water solubility index (WSI), and hardness were analyzed. The extrusion process was performed using a SYSLG-IV twin screw extruder (10 15 kg/hour capacity). The addition of mocaf/gaplek flour increased particle density, moisture content, L, and hardness but decreased the expansion ratio. Initial moisture content had a negative effect on the expansion ratio, WAI, and WSI while having positive effect on particle density, moisture content, and hardness. Increasing barrel temperature decreases the expansion ratio and moisture content but increases WAI and WSI. Extrudate treated with 14% moisture content was found to have better physical properties.

 

Keywords: Corn grit, Extrusion, Gaplek flour, Mocaf flour, Physical properties.

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Author Biographies

Joko Nugroho Wahyu Karyadi, Universitas Gadjah Mada

Department of Agricultural and Biosystem Engineering, Faculty of Agricultural Technology

Arifin Dwi Saputro, Universitas Gadjah Mada

Department of Agricultural and Biosystem Engineering, Faculty of Agricultural Technology

Devi Yuni Susanti, Universitas Gadjah Mada

Department of Agricultural and Biosystem Engineering, Faculty of Agricultural Technology

Dhyas Tanjung Prabowo Putri, Universitas Gadjah Mada

Department of Agricultural and Biosystem Engineering, Faculty of Agricultural Technology

Linggar Setianingrum, Universitas Gadjah Mada

Department of Agricultural and Biosystem Engineering, Faculty of Agricultural Technology

Rio Bagus Herlambang, Universitas Gadjah Mada

Department of Agricultural and Biosystem Engineering, Faculty of Agricultural Technology

Fahmi Baharudin, Universitas Gadjah Mada

Department of Agricultural and Biosystem Engineering, Faculty of Agricultural Technology

Ailsa Saraswati Samodra, Universitas Gadjah Mada

Department of Agricultural and Biosystem Engineering, Faculty of Agricultural Technology

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Published

2025-05-05

How to Cite

Karyadi, J. N. W., Saputro, A. D., Susanti, D. Y., Putri, D. T. P., Setianingrum, L., Herlambang, R. B., Baharudin, F., & Samodra, A. S. (2025). Physical Properties of Extrudates Based on Corn Grit, Mocaf Flour and Gaplek Flour Using a Twin Screw Extruder with Treatment of Moisture Content and Barrel Temperature. Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering), 14(3), 732–743. https://doi.org/10.23960/jtep-l.v14i3.732-743

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