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All Journal JURNAL KESEHATAN Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin
A. Mulyanto
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Aerospace Engineering Automotive Engineering Health Professions Mechanical Engineering Physics

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POTENSI LIMBAH PASAR SAYUR MENJADI STARTER FERMENTASI CS. Utama; A. Mulyanto
JURNAL KESEHATAN Vol 2, No 1 (2009): Pengembangan Ilmu-Ilmu Kesehatan
Publisher : JURNAL KESEHATAN

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (725.776 KB)

Abstract

Abstract Waste of vegetable market is solid waste organic consist of set of many vegetable after sorted because has been competent sell. Waste of vegetable rnarket in general predominated by cabbage and mustard. Cabbage production in Kabupaten Semarang according to BPS Kabupaten Semarang (2006) in number in 2005 reach 96.906 kws, whereqs mustard reaches 78,911 h,ys. Base perception at the site, mustord qnd exterior cabbage are thrown awqy counted j-5oh from heavy fresh vegetable because its condition improper sells. Waste of vegetable market haves big enough potency far exploited see enough to the number of mustard qmount and cabbage are thrown away. 600% wqste that indigenous to commercial activity in mqrket have the shape of vegetqbles waste and 20o% its hqve the shope of fruits garbage. According to Badan Pusat Statistik, in Central Java there is 1976 market units that produce market waste 1.300.000 tons every day in the form offresh, and a large part of (60%o) is organic garbage waste that have weakness level ofhigh water as high as 92,44% easy causative of cabbage waste decays until needed quick to process wqste is referred cts. Processing that felt eficient, easy, cheap, environmentally friendly and produce addition earnings is by make ferment starter that comprising active milcroorganisme genuiness from materials referred as Keyword : fermentation, starter, waste, sauerkraut
Effect of mass variation of material on continuous vertical type drying machines against drying time S. Syahrul; D.F. Nansah; A. Mulyanto; M. Mirmanto
Dinamika Teknik Mesin Vol 10, No 2 (2020): Dinamika Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (261.308 KB) | DOI: 10.29303/dtm.v10i2.353

Abstract

Post-harvest handling of grain before being ground or stored for a long time is drying or reducing water content.  To dry the grain is more effective by using a mechanical dryer. In this study, grain drying was carried out using a continuous vertical dryer by varying the grain mass to determine the effect of grain mass variation on the grain drying time.  Mass variations observed were 10 kg, 20 kg, 30 kg, 40 kg, 50 kg, 60 kg, with an air temperature of 50°C and an air velocity of 7 m/s. The result showed that the more grain mass the lower the drying rate. However, the drying time was longer, and the efficiency was higher. At the 10 kg, the fastest drying time was 75 minutes.  Whereas at the 60 kg,  the maximum drying time was 150 minutes.  The highest efficiency of 8.78, occured at a mass of 60 kg and the lowest efficiencywas 1.6%  occured at a mass of 10 kg.
Simulasi parameter geometri regenerator mesin termoakustik Nurpatria, N.; Syahrul, S.; Pandiatmi, P.; Sayoga, I.M.A.; Mulyanto, A.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 2 (2019): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (263.458 KB) | DOI: 10.29303/dtm.v9i2.299

Abstract

The utilization potentials of biomass energy in Indonesia is very large. As modeled in this paper, the energy carrier flue gas from biomass combustion in the form of heat and temperature is applied as thermodynamic source for the thermoacoustic engine model. Therefore, 33 different models were constructed, modified, and tested in DELTA-EC software simulation in order to reveal their capability. The performance based on the criterion of their acoustic power output and efficiency in a set of various combination of two regenerator geometry parameters applied, radial cross-sectional area and length. The simulation results show that greater the cross-sectional area, greater the acoustic power and engines efficiency. The smallest regenerator size is at 80 mm2 cross-sectional area and 54 mm length, generates acoustic power of 5.812 W with its corresponding efficiency of 0.686%. While the biggest regenerator in volume at 120 mm2 and 165 mm in size, be able to amplified acoustic power up to 22.810 W with efficiency of 2.693%. An engine model with the highest performance produces acoustic power of 25.848 W and efficiency of 3.051%. This model uses an optimal regenerators dimension with 120 mm2 area at length of 150 mm.
Pengeringan biji jagung menggunakan pengkondisi udara Mulyanto, A.; Mirmanto, M.; Susana, I.G.B.; Alit, I.B.; Nuarsa, I.M.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (352.891 KB) | DOI: 10.29303/dtm.v9i1.262

Abstract

This study aims to determine the effect of air velocity on the rate of drying corn. Corn seeds were placed after the evaporator of an air conditioner, so that the air came out of the evaporator entered the drying chamber. The water in the corn was evaporated and sucked by dry cold air and then it was condensed in the evaporator. The results show that the mass of corn seeds decreases with the time; the drying rate also decreases with the time and mass-based drying rates at low air speeds are faster than at high air speed. The air conditioner can be used for drying seeds.
Adsorbsi gas karbon dioksida dalam biogas dengan menggunakan endapan batu kapur Sutanto, R.; Mulyanto, A.; Wirawan, M.; Alit, I.B.; Nurchayati, N.
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 9, No 2 (2019): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (134.693 KB) | DOI: 10.29303/dtm.v9i2.290

Abstract

With the depleting reserves of energy sources and fuel shortages that occur in Indonesia today, it is needed a cheap alternative energy sources and environmentally friendly, one of which is biogas. In this study biogas is generated from horse manure. The fermentation of horse manure can produce biogas with the largest component of the CH4 (49.5%) and CO2 (49.7%). The use of biogas as a fuel is still in the household scale and has not been used optimally. This is due to the biogas still containing high levels of CO2 so that it has low value of heat is produced. This research reduces the CO2 levels by using the Ca(OH)2 or limestone sedimentary, and then react with the CO2 to form CaCO3 and H2O. The variables  studied are the influence of the flow rate of the biogas that CO2 absorbed and CH4. CO2 absorption made by passing the biogas with a variety of flow rates in the Ca(OH)2 at a certain concentration. Gas and Ca(OH)2 contact each other and the chemical reaction occurs. Every 2 minute interval of gas coming out of the absorber is detected by a biogas tester for analysis of absorbed CO2 and CH4 produced. The research results show that the average CO2 can be absorbed at all the variations of biogas flow rate (5 liter/min. 10 liter/min and 15 liter/min) produced CH4 at the biogas flow rate of 10 liter/min is 91%, then at the flow rate of 5 liter/min is 76.2% and at the flow rate of 15 liter/min is 72%.
Evaluation of the temperature of the rotary dryer with LPG fuel in drying cherry coffee Alit, I.B.; Susana, I.G.B.; Adhi, I.G.A.K.C.; Mulyanto, A.
Dinamika Teknik Mesin Vol 15, No 1 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i1.968

Abstract

Utilization of rotary dryers with liquefied petroleum gas (LPG) energy sources as an alternative to solar drying, which is highly dependent on the weather. This dryer is applied to small farmers to dry cherry coffee. The results of the study showed that the drying temperature reached an average of 63.92oC to dry a sample of 10 kg of cherry coffee. From testing, this sample still produced a reasonably high outlet temperature of the drying chamber, which was an average of 62.07oC. From this condition, it is possible to increase the amount of cherry coffee to be dried, and further testing is needed. LPG-based rotary dryers are very easy for small farmers. The drying process can be carried out all the time because it does not depend on the weather. In addition, LPG in Indonesia for small farmers is still subsidized, so it is economically affordable. The shorter drying time than solar drying allows small farmers to carry out their production process sustainably. In 20 hours of testing, it was able to reduce the moisture content from 62.84% to 9.95%.
Simulasi parameter geometri regenerator mesin termoakustik Nurpatria, N.; Syahrul, S.; Pandiatmi, P.; Sayoga, I.M.A.; Mulyanto, A.
Dinamika Teknik Mesin Vol 9, No 2 (2019): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v9i2.299

Abstract

The utilization potentials of biomass energy in Indonesia is very large. As modeled in this paper, the energy carrier flue gas from biomass combustion in the form of heat and temperature is applied as thermodynamic source for the thermoacoustic engine model. Therefore, 33 different models were constructed, modified, and tested in DELTA-EC software simulation in order to reveal their capability. The performance based on the criterion of their acoustic power output and efficiency in a set of various combination of two regenerator geometry parameters applied, radial cross-sectional area and length. The simulation results show that greater the cross-sectional area, greater the acoustic power and engines efficiency. The smallest regenerator size is at 80 mm2 cross-sectional area and 54 mm length, generates acoustic power of 5.812 W with its corresponding efficiency of 0.686%. While the biggest regenerator in volume at 120 mm2 and 165 mm in size, be able to amplified acoustic power up to 22.810 W with efficiency of 2.693%. An engine model with the highest performance produces acoustic power of 25.848 W and efficiency of 3.051%. This model uses an optimal regenerators dimension with 120 mm2 area at length of 150 mm.
Pengeringan biji jagung menggunakan pengkondisi udara Mulyanto, A.; Mirmanto, M.; Susana, I.G.B.; Alit, I.B.; Nuarsa, I.M.
Dinamika Teknik Mesin Vol 9, No 1 (2019): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v9i1.262

Abstract

This study aims to determine the effect of air velocity on the rate of drying corn. Corn seeds were placed after the evaporator of an air conditioner, so that the air came out of the evaporator entered the drying chamber. The water in the corn was evaporated and sucked by dry cold air and then it was condensed in the evaporator. The results show that the mass of corn seeds decreases with the time; the drying rate also decreases with the time and mass-based drying rates at low air speeds are faster than at high air speed. The air conditioner can be used for drying seeds.
Evaluation of the temperature of the rotary dryer with LPG fuel in drying cherry coffee Alit, I.B.; Susana, I.G.B.; Adhi, I.G.A.K.C.; Mulyanto, A.
Dinamika Teknik Mesin Vol 15, No 1 (2025): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v15i1.968

Abstract

Utilization of rotary dryers with liquefied petroleum gas (LPG) energy sources as an alternative to solar drying, which is highly dependent on the weather. This dryer is applied to small farmers to dry cherry coffee. The results of the study showed that the drying temperature reached an average of 63.92oC to dry a sample of 10 kg of cherry coffee. From testing, this sample still produced a reasonably high outlet temperature of the drying chamber, which was an average of 62.07oC. From this condition, it is possible to increase the amount of cherry coffee to be dried, and further testing is needed. LPG-based rotary dryers are very easy for small farmers. The drying process can be carried out all the time because it does not depend on the weather. In addition, LPG in Indonesia for small farmers is still subsidized, so it is economically affordable. The shorter drying time than solar drying allows small farmers to carry out their production process sustainably. In 20 hours of testing, it was able to reduce the moisture content from 62.84% to 9.95%.
Co-Authors Adhi, I.G.A.K.C. CS. Utama D.F. Nansah I Gede Bawa Susana I.B. Alit, I.B. M. Mirmanto, M. M. Wirawan, M. N. Nurchayati, N. N. Nurpatria, N. Nuarsa, I.M. Pandiatmi, P. S. Syahrul S. Syahrul, S. Sayoga, I.M.A. Sutanto, R.