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Analisis Pemanfaatan Energi Panas pada Pengeringan Bawang Merah (Allium ascalonicum L.) dengan menggunakan Alat Pengering Efek Rumah Kaca (ERK) Zamharir, Zamharir; Sukmawaty, Sukmawaty; Priyati, Asih
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 4 No 2 (2016): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (789.202 KB)

Abstract

Onion (Allium ascalonicum, L.) is one horticulture commodity that is widely cultivated by Indonesian society. There are many benefits that can be drawn from the onion and high economic value of these vegetables make farmers in various regions interested to cultivate them to earn huge profits. Purpose of this study was to analyze the needs of heat energy in the drying process of onions. Method used in this research was experimental methods by using Greenhouse Gasses (GHG) dryer for drying onion. This dryer utilizes solar energy as the only source of heat to raise temperature of the material in the drying process. On the first experimental stage (without materials) the highest temperature inside the dryer was 52°C and the lowest was 27°C, while the maximum temperature in the environment was 34°C and the minimum was 25°C. The average temperature difference between the dryer and the environment was 14°C with average solar radiation of 445 W/m². On the experiment using materials, the average temperature of the dryer during 4 days, the lowest was 37.75°C and the highest was 51.75° C; whereas the lowest and the highest environment temperature respectively was 25.8°C and 37.0°C. The average light intensity was 545 W/m², with average total amount of solar energy received was 2,227,262.7 kJ and the average drying efficiency was 39.9%.
INTRODUKSI ALAT PENGERING TIPE RAK BERPUTAR SEBAGAI UPAYA MEMPERCEPAT PROSES PENGERINGAN HASIL PETANIAN Sukmawaty Sukmawaty; Asih Priyati; Guyup Mahardhian Dwi Putra; Diah Ajeng Setiawati; Sirajuddin Haji Abdullah
JMM (Jurnal Masyarakat Mandiri) Vol. 3, No. 1: Juni 2019
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (365.339 KB) | DOI: 10.31764/jmm.v3i1.921

Abstract

Abstrak: Pengeringan didefinisikan sebagai proses pemindahan air dengan menggunakan panas dan aliran udara untuk mencegah atau menghambat pertumbuhan jamur dan bakteri. Tujuan kegiatan ini adalah meningkatkan pemahaman mahasiswa tentang penerapan teknologi pengeringan, sehingga membantu mahasiswa menentukan minat studi pada awal semester 5. Sebanyak 40 mahasiswa terlibat dalam kegiatan pengabdian ini. Hasil dari kegiatan ini menunjukkan 80% mahasiswa lebih memahami aplikasi proses pengeringan secara keseluruhan, dari awal hingga akhir proses.Abstract:  Drying is a process to remove water using heat and air flow, in order to prevent or inhibit the growth of fungi and bacteria. The purpose of this activity was to increase student’s understanding of drying technology application, that would help the student to determine their study interest in early of the 5th semester. As many as 40 students were involved in this activity. The results of this activity showed approximately 80% students have a better understanding regarding the application of the overall drying process, from the beginning to the final process.
Efek Daya Lampu Sinar UV C dan Lama Penyinaran Terhadap Perubahan pH dan Total Padatan Terlarut Nira Aren Selama Penyimpanan Hary Kurniawan; Sukmawaty Sukmawaty; Murad Murad; Ansar Ansar; Rahmat Sabani; Kurniawan Yuniarto
Jurnal BETA (Biosistem dan Teknik Pertanian) Vol 8 No 2 (2020): September
Publisher : Program Studi Teknik Pertanian, Fakultas Teknologi Pertanian, Universitas Udayana, Badung, Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JBETA.2020.v08.i02.p20

Abstract

Penelitian ini bertujuan untuk mengetahui efek daya lampu sinar ultraviolet (UV C) dan lama penyinaran terhadap perubahan pH dan total padatan terlarut pada nira aren selama penyimpanan. Penelitian dilakukan menggunakan Rancangan Acak Lengkap dengan dua faktor yaitu perlakuan daya lampu UV C dan lama penyinaran. Parameter yang diukur yaitu pH dan brix dan pengukuran diulang sebanyak tiga kali. Hasil penelitian menunjukkan bahwa nira aren yang diberi perlakuan sinar UV C memiliki laju perubahan pH yang lebih rendah dibandingkan kontrol. Semakin tinggi daya lampu UV C yang digunakan mampu memperlambat laju perubahan pH nira aren. Faktor kekeruhan, buih, kandungan asam organik maupun zat yang tersuspensi pada nira aren diketahui menjadi faktor lama penyinaran tidak berjalan efektif dikarenakan transmisi sinar UV yang rendah. Efek daya lampu UV C dan lama penyinaran diketahui mampu menjaga kestabilan kandungan total padatan terlarut pada nira aren.
Sistem Pendeteksi Kerusakan Buah Mangga Menggunakan Sensor Gas Dengan Metode DCS - LCA Murad Murad; Sukmawaty Sukmawaty; Ansar Ansar; Rahmat Sabani; Syahroni Hidayat
JTIM : Jurnal Teknologi Informasi dan Multimedia Vol 3 No 4 (2022): February
Publisher : Puslitbang Sekawan Institute Nusa Tenggara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35746/jtim.v3i4.169

Abstract

Fruits, including mangoes, produce a wide variety of volatile organic compounds that give them their distinct aroma. Characteristics of fruit aroma is one of the important keys in determining consumer acceptance in the commercial fruit market based on individual preferences. So a possible way to determine the level of ripeness/damage is to feel the distinctive aroma presented by the fruit using a gas sensor. This study aims to build a system that can detect mango damage based on its aroma. The sensors used are TGS 2600, MQ3, MQ4, MQ2, and MQ8 which are connected to the Arduino Mega 2560. The learning model used is an ensemble learning model of Dynamic Classifier Selection (DCS) with Local Class Accuracy (LCA)/DCS-LCA. This algorithm combines Logistic Regression, Selection Tree, Support Vector Machine (SVM), Naïve Bayes, Random Forest, and Neural Networks. The model was then tested with a comparison of the amount of test data and training data of 70%:30%. The test results showed that the overall system Accuracy was 75% and the ability to detect mango fruit damage was 71%. The DCS-LCA classifier model outperforms each of its constituent base classifiers.
Pengaruh kecepatan udara dan massa gabah terhadap kecepatan pengeringan gabah menggunakan pengering terfluidisasi S. Syahrul; M. Mirmanto; S. Romdani; S. Sukmawaty
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 7, No 1 (2017): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (520.852 KB) | DOI: 10.29303/dtm.v7i1.8

Abstract

Grain processing does not meet the actual grain harvests. This is due to the unsuitable drying process. Milling grain entrepreneurs and farmers in Indonesia are currently conducting a drying process under the sun. Based on the National Standards Body (BSN), grain moisture content must be at 14% to maintain the grain at high qualities. The purpose of this study is to determine the effect of velocity and grain mass variations on drying times. The grain used in this study contains an initial moisture content of 22% ± 0.5%. The grain is dried by inserting it into the drying chamber and varying the air velocities and grain mass. The air velocities used are 4 m/s, 5 m/s, 6 m/s and the variations of the grain mass are 1 kg 2 kg and 3 kg. The results show that increasing the air velocity decreases the drying time. On the other hand, when the grain mass is increased, the drying time elevates. The air velocity and mass of the grain that results in the fastest drying time are 6 m/s and 2 kg. The time required for achieving the water content of 13.6% is 30 menit. At the air velocity of 4 m/s, and the grain masses of 1 kg, 2 kg, and 3 kg, to achieve moisture contents of 13.4%, 13.5% and 13.4% the drying time needs 50 minutes.
Penentuan Konstanta Laju Pengeringan Coconut Chips Hary Kurniawan; Sukmawaty Sukmawaty; Ansar Ansar; Kurniawan Yuniarto; Murad Murad; Rahmat Sabani
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 1 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i1.205

Abstract

This study aims to determine the drying rate constant of coconut chips using an oven. Coconut chips drying is carried out at drying temperatures of 50 ° C, 60 ° C and 70 ° C. Drying coconut chips has been conducted at an initial water content of 40-50% wb until it reached ± 10% wb. The change of moisture content was measured every 15 minutes, and the measurement of the water content was determined by the thermogravimetric method. Newton's model was used in determining the observation drying rate constant. Furthermore, the observation drying rate constant was applied to predict the drying rate constant as a function of temperature using the Arrhenius equation. The results showed that the predicted drying rate constants ranged from 0.0090 - 0.0130 minute-1. 
ANALISIS KINERJA ALAT DESALINASI AIR LAUT PENGHASIL AIR TAWAR DAN GARAM DENGAN MENGGUNAKAN TENAGA SURYA Sopiyan Iqbal; Sukmawaty Sukmawaty; Guyup Mahardhian Dwi Putra; Diah Ajeng Setiawati
Jurnal Agrotek Ummat Vol 6, No 1 (2019): Februari
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (278.276 KB) | DOI: 10.31764/agrotek.v6i1.988

Abstract

Penelitian ini bertujuan mengetahui kinerja alat desalinasienergi surya. Metode yang digunakan adalah metode eksperimental dengan mendestilasikan air laut sebanyak 5 liter selama 5 hari. Pengambilan data dilakukan setiap hari selama 10 jam (08.00-17.00 WITA). Parameter yang diamati adalah intensitas matahari (IT, W/m2), temperatur air laut (Tal, °C), temperatur air tawar (Tat, °C), temperatur plat penyerap (Tc, °C), temperatur penguapan (Tsv, °C), temperatur lingkungan (Ta, °C), produktivitas air tawar (liter), serta garam yang terbentuk (liter). Hasil pengamatan menunjukkan bahwa intensitas matahari sangat berpengaruh terhadap produktivitas destilat yang dihasilkan. Volume destilat terbesar dihasilkan pada hari kedua dengan efisiensi energi mencapai 97,52%.