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All Journal Pelita Perkebunan JURNAL PANGAN Journal of Applied Agricultural Science and Technology
Ari Rahayuningtyas
Balai Besar Pengembangan Teknologi Tepat Guna
Agriculture, Biological Sciences & Forestry Social Sciences

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Pengeringan Lapisan-Tipis Irisan Singkong Menggunakan Pengering (Infrared Thin-Layer Drying Of Cassava Chips Using Infrared Dryer) Afifah, Nok; Rahayuningtyas, Ari; Haryanto, Aidil; Intan Kuala, Seri Intan Kuala
JURNAL PANGAN Vol 24, No 3 (2015): PANGAN
Publisher : Perum BULOG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (789.421 KB) | DOI: 10.33964/jp.v24i3.237

Abstract

Penelitian ini bertujuan untuk mengevaluasi karakteristik pengeringan lapisan-tipis irisan singkong dengan menggunakan pengering inframerah pada skala pilot untuk memenuhi kebutuhan usaha kecil dan menengah. Penelitian dilakukan pada dua tingkat temperatur “set-point” yaitu 50oC dan 60oC. Irisan singkong sebanyak 6 kg dengan kadar air awal 60–68 persen pada basis basah dikeringkan dalam pengering menjadi kadar air 14 persen. Setiap 30 menit, udara pengering diukur temperaturnya dan irisan singkong yang dikeringkan dianalisis kadar airnya. Hasil penelitian memperlihatkan bahwa waktu pengeringan lebih cepat dengan peningkatan temperatur set-point dan sekitar 44–62 persen kadar air teruapkan selama pengeringan 3-4 jam. Berkaitan dengan kinetika pengeringan, dua buah model matematika diujikan terhadap data eksperimen. Ditemukan bahwa model Page lebih dapat mempresentasikan pola pengeringan irisan singkong dibandingkan model Henderson-Pabis.This study is aimed to evaluate the characteristics of the thin-layer drying of cassava chips using a pilot scale infrared dryer to meet the needs of small and medium enterprises. The drying experiments are carried out at two levels of temperature set-points viz. 50 and 60°C respectively. Every 30-minute the drying air temperature is measured and the chips is analyzed for its moisture content. Cassava chips with 6 kg weight and 60–68 percent moisture content on wet basis is dried in the dryer. It is found that the drying time decreases with an increase in temperature set point and approximately 44–62 percent of the moisture is removed during the drying for 3-4 hours. With regard to drying kinetics, two commonly used mathematical models sre examined with the experimental data. It is found that the Page model provides a good fit between the experimental and predicted moisture ratio values compared to that of Henderson-Pabis model. 
Rancang Bangun, Uji Performa dan Analisa Biaya Pengeringan Irisan Singkong Menggunakan Pengering Inframerah (Design, Construction, Performance Evaluation and Cost Analysis of Cassava Chips Using Infrared Dryer) Rahayuningtyas, Ari; Afifah, Nok
JURNAL PANGAN Vol 25, No 1 (2016): PANGAN
Publisher : Perum BULOG

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1255.713 KB) | DOI: 10.33964/jp.v25i1.304

Abstract

Tujuan penelitian ini adalah untuk merancang bangun pengering inframerah berbahan bakar gas. Tahap kegiatan yang dilakukan adalah melakukan perancangan, terdiri dari perancangan struktural dan fungsional, konstruksi, pengujian, dan analisis biaya. Pengujian dilakukan pada setting temperatur 50°C dan kelembaban relatif mendekati 20 persen dengan kecepatan udara masuk 3,4 m/detik. Parameter pengujian terdiri dari distribusi temperatur, kelembaban relatif, kadar air, dan kebutuhan energi. Hasil penelitian menunjukkan bahwa dari perancangan struktural dan fungsional diperoleh dimensi ruang pengering berukuran 2000 mm x 2000 mm x 2000 mm, dengan 2 buah rak berukuran 1500 mm x 500 mm x 1400 mm dan 44 buah loyang berukuran 600 mm x 400 mm x 30 mm. Evaluasi kinerja pengering menggunakan 36 kg irisan singkong. Kadar air awal 60,23 persen turun menjadi 7,56 persen membutuhkan waktu pengeringan selama 5 jam menghasilkan produk sebesar 17 Kg. Konsumsi LPG yang dibutuhkan sebesar 2,5 kg dengan energi yang dibutuhkan sebesar 135 MJ. Besarnya biaya pokok yang harus dikeluarkan untuk mengkonstruksi pengering ini adalah Rp. 69.644.959, sedangkan biaya pokok pengeringan singkong pada kapasitas penuh sebesar Rp. 5.683/Kg.The research was purposed to design and construct infrared dryer using gas fuel. The design consists of structural and functional design, construction, testing, and cost analyzing. The testing was done by set 50oC temperature and relative humidity about 20 percent with air velocity inlet 3,5 m/s. Testing parameters consists of temperature distribution, relative humidity, moisture content, and energy requirement. The result of structural and functional design  showed that the dryer dimension was 2000 mm x 2000 mm x 2000 mm, with 2 rack sized 1500 mm x 500 mm x 1400 mm and the number of trays 44 sized 600 mm x 400 mm x 30 mm. The  performance evaluation using 36 Kg cassava chips. Initial moisture content 60,23 percent decreased to 7,56 percent, drying time needed 5 hours and  resulted product about 17 Kg.  The LPG needs to dry those chips is 2,5 kg, equivalent with 135 MJ. The total cost for construction is amount Rp 69.644.959,- while the total cost for cassava drying at full capacity is amount Rp 5.683/Kg.
Optimization of Fluid-Type Roasting Machine on Robusta Roasted Coffee Characteristics Rahayuningtyas, Ari; Azizah, Ida Farikha; Witman, Steven; Hidayat, Dadang Dayat; Rohzan, Alifia Fauziah; Ikrawan, Yusep; Ngatinem, Ngatinem
Journal of Applied Agricultural Science and Technology Vol. 8 No. 3 (2024): Journal of Applied Agricultural Science and Technology
Publisher : Green Engineering Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55043/jaast.v8i3.282

Abstract

Coffee is a superior plantation commodity playing an important role in Indonesian economic growth, as a contributor to income and provider of employment. The handling process of coffee, particularly at roasting stage, has a significant impact on the quality of the final product. The Research Center for Appropriate Technology, National Research and Innovation Agency, has developed fluid-type roasting machine with a capacity of 750 grams (g) and fueled by LPG (liquefied petroleum gas). Therefore, this research aimed to determine the characteristics of robusta roasted coffee through performance tests of fluid-type roasting machine. Performance tests were carried out to determine the static characteristics of temperature sensor and ensure accurate provision as well as consistent readings in effectively controlling roasting process. Some of the characteristics that were determined included moisture content by thermogravimetric method, color, texture, caffeine, and microscopic analysis. The results showed that fluid-type roasting machine had a high-temperature sensor accuracy of 1.3% and repeatability of 0.69. The physical and chemical analysis showed that roasting temperature significantly affected the characteristics of roasted coffee beans. Additionally, higher temperature caused an increase in cracking of coffee beans, ash content, texture, caffeine content, and darker color, along with lower moisture content.
Physicochemical and Sensory Attributes of Robusta Coffee as Influenced by Sorbitol Concentration and Roasting Time Hidayat, Dadang D.; Ikrawan, Yusep; Harin, Natasha Yollandita; Furqon, Maulana; Rahayuningtyas, Ari; Sudaryanto, Arie; Sagita, Diang
Pelita Perkebunan (a Coffee and Cocoa Research Journal) Vol. 39 No. 1 (2023)
Publisher : Indonesian Coffee and Cocoa Research Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/iccri.jur.pelitaperkebunan.v39i1.532

Abstract

Many studies have reported several methods to improve the quality of Robusta coffee such as fermentation, but it takes a relatively long time. In this study, a new processing method for Robusta coffee quality enhancement was investigated. Robusta coffee cherry was immersed using sorbitol solution under different concentrations (10%, 15%, and 20%), then the green bean coffee was roasted with several roasting duration (1, 3, and 5 minutes after coffee beans cracking) to determine the characteristic of coffee produced. Characteristics examined were chemical responses consisted of water content, pH, caffeine content, and anti- oxidant activity (IC50); physical responses consisted of L* color attribute; and organoleptic responses consisted of color, aroma, taste, and aftertaste. Principal component analysis (PCA) was employed to examine the qualitative correlations between dependent variables. The results demonstrated that the concentration of sorbitol of 10% to 20% altered the organoleptic reaction but not the physical and chemical responses. The roasting time impacted the coffee’s water content, pH, antioxidant activity (IC50), color, flavor, and aftertaste, but not its caffeine content and aroma. The interaction between sorbitol concentration and roasting time influences the color, flavor, and aftertaste characteristics of coffee. This finding led to an improvement in the quality of Robusta coffee. Furthermore, PCA showed that IC50 value was positively correlated with pH value and was conversely correlated with water content and L*, and slightly correlated with caffeine. Sensory attributes had no correlation with variables of IC50, caffeine and pH, and L*.
Co-Authors A.A. Ketut Agung Cahyawan W Aidil Haryanto, Aidil Azizah, Ida Farikha Dadang D. Hidayat, Dadang D. Furqon, Maulana Harin, Natasha Yollandita Hidayat, Dadang Dayat Ignatius Fajar Apriyanto, Ignatius Fajar Ikrawan, Yusep Intan Kuala, Seri Intan Kuala Muhammad Afif Ngatinem, Ngatinem Rohzan, Alifia Fauziah Sagita, Diang Seri Intan Kuala, Seri Intan Sudaryanto, Arie Witman, Steven