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All Journal Reaktor TEKNIK METANA Seminar Nasional Teknik Kimia Kejuangan Majalah Ilmiah MOMENTUM Jurnal Rekayasa Mesin SASI
Hargono Hargono
Jurusan Teknik Kimia, Fakultas Teknik, Fakultas Teknik Universitas Diponegoro
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering

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Journal : Reaktor

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KARAKTERISASI PROSES PENGERINGAN JAGUNG DENGAN METODE MIXED-ADSORPTION DRYING MENGGUNAKAN ZEOLITE PADA UNGGUN TERFLUIDISASI Hargono Hargono; Mohamad Djaeni; Luqman Buchori
Reaktor Volume 14, Nomor 1, April 2012
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (322.265 KB) | DOI: 10.14710/reaktor.14.1.33-38

Abstract

CHARACTERIZATION OF CORN DRYING PROCESS USING MIXED-ADSORPTION DRYING METHOD UTILIZING ZEOLITE PARTICLES IN A FLUIDIZED BED SYSTEM. Corn (Zea mays L.) representing important food requirement besides paddy and wheat. Handling of time after rice harvest become the priority so that corn quality can be awaked better. Drying process by adsorption-fluidized bed become a choice to replace the conventional corn drying systems. This research aim to look for the effect of the inlet air temperature, type of zeolite, and ratio of corn and zeolite to drying rate, content of protein and fat, and to calculate dying rate constant, k. Energy efficiency is calculated based on amount of heat is used to evaporate the water from corn (Qevap) divided by total of heat requirement for the regeneration of zeolite and increase the air temperature (Qintr). This research conducted by mixing zeolite as adsorben with the corn with the certain comparison ratio in the fluidized bed at temperature of 30-50oC. Results of research indicate that the fastest drying rate is marked by biggest water rate degradation that happened at 50oC by zeolite sintetis and ratio of corn and zeolite is 25:75%. Drying rate constant is 0.0303. Protein content degradates from 9.10% to 8.30%, while for the content of fat is constant. Energy efficiency is obtained of 81.23%. Jagung (Zea mays L.) merupakan kebutuhan pangan yang penting selain padi dan gandum sehingga penanganan paska panen menjadi prioritas agar kualitas jagung dapat terjaga dengan baik. Proses pengeringan dengan cara adsorpsi-unggun terfluidisasi menjadi suatu pilihan untuk menggantikan sistim pengering jagung konvensional yang boros energi. Penelitian ini bertujuan untuk mencari pengaruh suhu udara masuk, jenis zeolite, dan rasio berat jagung dan zeolite terhadap kecepatan pengeringan, kandungan protein dan lemak dan menghitung harga konstanta laju pengeringan, k. Untuk keperluan energi dihitung pula efisiensi energi (h) berdasarkan jumlah panas yang digunakan untuk menguapkan air dari jagung (Qevap) dibagi dengan kebutuhan panas total untuk meregenerasi zeolite dan menaikkan suhu udara (Qintr). Penelitian dilakukan dengan mencampurkan zeolite sebagai adsorben dengan jagung dengan rasio perbandingan tertentu dalam suatu unggun yang difluidisasi menggunakan udara pada suhu percobaan 30-50oC. Hasil penelitian menunjukkan bahwa laju pengeringan paling cepat ditandai oleh penurunan kadar air yang paling besar yang terjadi pada suhu 50oC dengan menggunakan zeolite sintetis dan dengan rasio berat jagung dan zeolite adalah 25% : 75%. Nilai konstanta laju pengeringan diperoleh 0,0303. Kadar protein terjadi penurunan dari 9,10% menjadi 8,30%, sedangkan untuk kandungan lemaknya relatif tetap. Hasil perhitungan diperoleh efisiensi energi (h) sebesar 81,23%.
Composite Encapsulating Agent for NaFeEDTA Microencapsulation Using Spray Drying Method Handayani, Noer Abyor; Aryanti, Nita; Haryani, Kristinah; Hargono, Hargono; Adina, Alifia Rizki; Yuliani, Sari; Adristy, Vania Zulfa
Reaktor Volume 25 No.2 August 2025
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.25.2.%p

Abstract

Iron microencapsulation is one of the solutions to protect iron from reacting with other substances that result in quality declines of fortified food products. The coating materials used should be appropriate for the specified encapsulation process. This study combined glucomannan and maltodextrin as coating materials and added HPMC as an additive to encapsulate NaFeEDTA. The results showed that such a combination could increase the encapsulation efficiency. The morphologies of the resulting microcapsules obtained from four formulations applied in this study were identical; numerous wrinkles appear on the particle’s surfaces due to the presence of HPMC. All formulations had a narrow size distribution with an average particle size between 105 and 111 µm, thermal resistance up to a temperature of ± 200°C, and the same functional groups but with different intensities. The NaFeEDTA included in all formulations had a bioavailability value of 2.3 - 2.9%. The best formulation, based on the gastrointestinal digestion simulation, was shown by the formulation with a glucomannan:maltodextrin ratio of 2:3 (in 1% w/v coating material) with a release percentage of 64.28% in SGF solution and an increase of 2.27% in SIF solution. To prevent anemia, ± 400 mg of iron microcapsules resulting from the best formulation in this study are required to meet 75% of the daily intake.
Co-Authors Adimas Wahyu Santoso Adina, Alifia Rizki Adristy, Vania Zulfa Agnes Kinanthi Nugraheni Ahmad Rustan Alba, La Ode Aprilina Purbasari Bakti Jos C. S. Budiyati Fachmi Jambak Fitra Pradhita Gleys Kasih Deborah Hantoro Satriadi Harles, Hendra K. Haryani Kristinah Haryani Lazuardy R. Zakaria Luqman Buchori M. Djaeni Margaretha Praba Aulia Nadia Zahrotul Firdausi Nita Aryanti Noer Abyor Handayani Nugraha Bayu Samodra Putri, Sheila Amanda Rahman, Rofi Aulia Yuliani, Sari Zakaria, Muhammad Fahmi