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All Journal JOURNAL OF COASTAL DEVELOPMENT Reaktor International Journal of Science and Engineering (IJSE) International Journal of Renewable Energy Development TEKNIK JURNAL TEKNOLOGI KIMIA DAN INDUSTRI IPTEK The Journal for Technology and Science Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Agrointek Bulletin of Chemical Reaction Engineering & Catalysis Seminar Nasional Teknik Kimia Kejuangan Majalah Ilmiah MOMENTUM Jurnal Aplikasi Teknologi Pangan Communications in Science and Technology Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia JURNAL PANGAN Jurnal Inovasi Teknik Kimia Jurnal Pasopati : Pengabdian Masyarakat dan Inovasi Pengembangan Teknologi Jurnal Profesi Insinyur Indonesia Journal of Bioresources and Environmental Sciences Bulletin of Chemical Reaction Engineering & Catalysis
M. Djaeni
Department Of Chemical Engineering ; Faculty Of Engineering; Diponegoro University Jl Prof H. Soedharto, SH, Tembalang Semarang, Indonesia Phone: +62247460058; Facs: +62247460055
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Social Sciences Transportation Other

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Degradation rate of vitamin B6 on red chili pepper drying by blanching-brine-calcium pretreatment Arifin, Uma Fadzilia; Djaeni, Mohamad
Communications in Science and Technology Vol 2 No 2 (2017)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.2.2.2017.56

Abstract

Drying is one of the alternatives to prevent spoilage in red chili pepper by removing moisture content. Red chili pepper (Capsicum frutescens) has complex nutrition components such as vitamins and bioactive compound. However, vitamin B6 content in chili can degrade significantly in drying process by heat. This research studied degradation rate of vitamin B6 in chili drying process under various pretreatments and temperatures. In this study, post-harvest chili before dried was pretreated by blanching, osmotic dehydration with brine, immersing in calcium chloride solution and the combination of all them. They were dried in tray dyer at various temperatures 40°C, 50°C, 60°C and 70°C. Degradation of vitamin B6 content was analyzed every 2 hours by High-Performance Liquid Chromatography for 8 hours. Results showed that blanching-brine-calcium pretreatment was expected to reduce drying time and retain high content of vitamin B6 in red chili pepper. The degradation rate of vitamin B6 in chili followed second-order reaction. The degradation rate was influenced by temperature change referring to Arrhenius equation with activation energy was about 31.97 kJ/ mol K and constant rate (k0) was 3.769. Therefore, the vitamin B6 retention can be estimated at various pretreatments, times and temperatures. Furthermore, the favorable drying conditions can be evaluated.
Techno-economic analysis of biomass-powered fixed bed dryer with air dehumidification for paddy drying Djaeni, Mohamad; Sasongko, Setia Budi; Utari, Febiani Dwi; Siqhny, Zulhaq Dahri
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1555

Abstract

This study introduces the innovative use of synthetic zeolite adsorbents in biomass-powered fixed bed dryers for enhanced paddy drying. The novel integration significantly improves moisture removal and energy efficiency, addressing limitations of conventional drying methods. Key findings include an effective moisture diffusivity of 2.24 × 10?? m²/s and energy efficiency reaching up to 68%. The economic analysis highlights an Internal Rate of Return (IRR) within 2.04 years, confirming the financial viability of this technology. This advanced drying system demonstrates superior performance and sustainability, offering a promising solution for industrial-scale paddy drying.
Drying kinetics and thermal energy evaluation of Moringa oleifera leaves drying using dehumidification with zeolite Siqhny, Zulhaq Dahri; Sari, Anisa Rachma; Utari, Febiani Dwi; Djaeni, Mohamad
Journal of Bioresources and Environmental Sciences Vol 3, No 1 (2024): April 2024
Publisher : BIORE Scientia Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61435/jbes.2024.19811

Abstract

Moringa Oleifera leaves contain many phytochemical compounds, as the potential source of antioxidants. The leaves must be converted into dried form to extend the shelf life and prevent the nutritional qualities. The lack of a common sun-drying process for Moringa Oleifera leaves is dependent on the weather. But using convective dryers also requires high investment costs and results in very low energy efficiency. One potential option to enhance energy efficiency is lowering the humidity by dehumidification with zeolite. This research aims to evaluate the effect of drying temperature and the weight of adsorbent (zeolite) on drying kinetic and thermal efficiency of Moringa Oleifera leaves drying. Moringa Oleifera leaves were dried under different drying temperatures (30-70℃) and weight of zeolite (0-0.3 kg). The moisture content of Moringa Oleifera leaves and the input-output temperature was recorded to evaluate the moisture reduction and thermal efficiency. Results showed that the Page model can be used to predict the drying time. At the higher drying temperature and higher zeolite weight, moisture reduction and thermal efficiency increased. But the effect of zeolite is only significant in drying at temperatures below 50℃.
Co-Authors . Widayat A. Agusniar A. Mahayana A. Nurhasanah A. Prasetyaningrum1 A. Sutanto Affian Widjanarko Affian Widjanarko Aga Aulia Rahman Ahdayani Rosarrah Ahmad M. Fuadi Ainiyyah Fatin Ajeng Yulianti Dwi Lestari Aji Prasetyaningrum Andri Cahyo Kumoro Annisa, Arianti Nuur Aprilina Purbasari Azafilmi Hakiim Berkah Fajar Tamtomo kiono Bery Kristanti Cindi Yasintasia Cynthia Anggi Maulina D. Setyani Dessy Agustina Sari Dewi Ayuningtyas Djoko Mulyono Febiani Dwi Utari Febiani Dwi Utari Febiani Utari Galih Satrio Lelono H Hadiyanto Hadiono Soegeng Rahardjo Hargono . Hargono Hargono Hargono Hargono Hargono Hargono Hartono, Damin Harum Nissaulfasha Ismi Ari Fitria Jefri Chandra Runanda Jumali Jumali Kristin Valentina Sinabutar Laeli Kurniasari Lisna Krisan Wibowo Listyadevi, Yuniar Luthfia Luqman Buchori M. Ikhwan Shofarudin Maharani Ratridewi Maulana, Kemal Meilya Suzan Triyastuti, Meilya Suzan N. Asiah Nita Ariani Novita, Dewi Ayu Nurul Aishah Aishah Nurul Asiah Nurul Asiah Prakoso, Satrio Budi R Ridwan R. Ridwan Rahmat Hidayat Raka Dimas Saputra Ratnawati Ratnawati Rohmat Figiarto S Suherman Sari, Anisa Rachma Setia Budi Sasongko Sheila Luvi Galvani Siqhny, Zulhaq Dahri Suci Dhiya Mayra Suherman Sumirat Sumirat Tri Nugroho Uma Fadzilia Arifin Uma Fadzilia Arifin, Uma Fadzilia Utari, Febiani Utari, Febiani Dwi Vera Pangni Fahriani Verona Amelia Vita Efelina Wiratno Wiratno