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Junaedi Muhidong
Universitas Hasanuddin
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Engineering Environmental Science

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The Evaluasi Kinerja Model Page Pada Pengeringan Lapisan Tipis Umbi Iles-Iles Mukmin Mukmin; Junaedi Muhidong; Abdul Azis
Jurnal Agritechno Jurnal Agritechno, Vol. 14, Number 1, April 2021
Publisher : Depertemen Teknologi Pertanian Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/at.v14i1.399

Abstract

The iles-iles is an umber plant having a high economic potential. This plant can only grow in tropical and subtropical areas. This study aims to evaluating the accuracy of the page model in estimating the moisture ratio of the iles-iles in the form of slice during the thin layer drying process. This research uses 450C and 550C drying temperature as well as the thickness of iles-iles 1,0 cm and 0,5 cm. Drying air velocity was used at 1,0 m/s. The observation parameters used on this study were the weight of the sample and the drying time. Results of this study are the water-level drop pattern, moisture ratio drop pattern, the value of page model drying, and page model evaluations. Those results describe that the relation between the predictive value and the observation value of moisture ratio create regression equations without the intersept with R2 approaching value. Consequently, the acquired page model is preferred to give partial predictions of iles-iles. Meanwhile the R2 value is 0.998, the chi-squared, value is 5.202x102, and the RMSE value is. The concise of R2, Chi-Squared, and RMSE with the previous research had relatively small value that indicated that a page model drying performance on the study was also quite good
Karateristik Fisik Bunga Cengkeh (Syzygium aromaticum) Miftahul Jannah; Junaedi Muhidong; Mursalim Mursalim
Jurnal Agritechno Jurnal Agritechno, Vol. 13, Number 1, April 2020
Publisher : Depertemen Teknologi Pertanian Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (332.396 KB) | DOI: 10.20956/at.v13i1.251

Abstract

Clove (Syzygium aromaticum), belongs to the Myrtaceae family and is one of Indonesia's native spice plants originating from the Maluku Islands. Clove post-harvest handling at the farm level is still done manually, one of which is the separation of flowers from the stems that are still using their hands. Flowers and clove stems need to be separated because they have different prices and qualities. The purpose of this study was to determine the attachment of cloves to their stems and physical characteristics (dimensions, weight and moisture content) of clove flowers in the varieties of Zanzibar, Si-Putih and Si-Kotok. Adhesiveness is intended as the force needed to release the clove flower from the stem so that it can be a reference and basic reference in the design of the clove flower separator from the stem or other processing equipment. This study used samples of clove flower varieties of Zanzibar, Si-Putih and Si-Kotok based on the color of the flower (level of maturity). The results of this study indicate that the adhesiveness of the clove Si-Kotok variety is 0.22 kg, the Zanzibar variety is 0.17 kg and the Si-Putih variety is 0.15 kg. In terms of color, the adhesiveness of red clove flowers is 0.22 kg, red green is 0.17 kg and green is 0.16 kg. The adhesiveness of cloves does not have a consistent correlation with the parameters of the physical properties of cloves.
Rancang Bangun Inkubator Untuk Pengamatan Sorpsi Isotermis Berbasis Kaidah Exfert Hartono Hartono; Junaedi Muhidong; Ikbal
Jurnal Agritechno Jurnal Agritechno Vol. 16, Nomor 1, April 2023
Publisher : Depertemen Teknologi Pertanian Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70124/at.v16i1.1182

Abstract

The isotherm shorpsi curve is essential for estimating drying time, packaging, and material stability during storage. Based on the static method, the equilibrium moisture content of the material is obtained in a state of still air at a constant temperature. This research aims to make an incubator with constant temperature control. The method used in this study consisted of several stages, namely the design and assembly of the device, sensor calibration, and temperature rise testing. The results of the calibration of the tool show an average value of R2 = 0.998. This value indicates that the temperature readings from the sensor used with the mercury thermometer readings are very close. The temperature rise in the storage room experiences a constant increase until it reaches the setting point.
Co-Authors Abdul Azis Hartono Hartono Ikbal Miftahul Jannah Mukmin Mukmin Mursalim Mursalim