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Pengembangan Model Sistem Pendukung Keputusan Dengan Kombinasi Metode Fuzzy Tahani Dan Topsis Dalam Penilaian Kinerja Instruktur Safrizal, Safrizal; Susianto, Susianto
J-SAKTI (Jurnal Sains Komputer dan Informatika) Vol 3, No 2 (2019): EDISI SEPTEMBER
Publisher : STIKOM Tunas Bangsa Pematangsiantar

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (977.453 KB) | DOI: 10.30645/j-sakti.v3i2.143

Abstract

The instructor is the main academic implementer in the Institute for Aviation Education and Training (LPP). One of the factors that influence the success of LPP Aviation in improving student quality is the commitment and performance of instructors. One method used is to conduct an instructor performance appraisal process. The large number of Instructors in LPP Aviation is a separate issue in the assessment process, considering the process is based on subjectivity and has a great chance of making mistakes in the decision making, namely the selection of instructors who do not meet the desired standards and are not in accordance with the determination of instructor performance evaluation priorities. For this reason, a decision support system is needed in conducting the instructor's performance appraisal process. The Multi Attribute Decision Making (MADM) model has been widely used by decision makers to solve decision making problems with a variety of methods that can be used to find the best solution, but from these methods can still be developed with the aim of providing maximum decision results. In this research a decision support system model will be built with a combination of two methods, namely the Fuzzy Resistant method and TOPSIS which aims to manipulate the success data of instructors who are ambiguous by conducting a search for appropriate and accurate data for the criteria used in the assessment process LPP Aviation instructor performance by using Fuzzy-Resistant to get priority criteria in the form of rules, then ranking will be done by using TOPSIS in getting the quality of teaching conducted by LPP Aviation Instructors as the best instructor selection. The results of the flight instructor's performance evaluation with a combination of the Fuzzy Resistant method and TOPSIS, are based on 250 data tested samples, therefore, the accuracy value is 93%.
PEMODELAN DAN SIMULASI DISTILASI BATCH BROTH FERMENTASI PADA TRAY COLUMN DENGAN SERABUT WOOL Permatasari, Ratih; Atlway, Ali; Susianto, Susianto
Teknik Kimia Vol 9, No 2 (2015): JURNAL TEKNIK KIMIA
Publisher : jurusan teknik kimia

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Abstract

Ketersediaan energi sangat penting peranannya bagi kelanjutan kehidupan suatu negara. Pemanfatan energi terbarukan masih relatif kecil. Beberapa hal yang menghambat pengembangan energi terbarukan. Dan salah satu energi terbarukan adalah bahan bakar nabati. Bahan bakar nabati seperti bioetanol merupakan hasil fermentasi. Untuk memperoleh bioetanol dari fermentasi biasanya menggunakan distilasi batch multikomponen. Distilasi batch multikomponen adalah proses pemisahan zat tertentu berdasarkan titik didihnya. Untuk menunjang hal tersebut, maka dilakukan penelitian permodelan distilasi batch multikomponen ethanol dari broth fermentasi. Kemudian validasi dari model matematika yang dibuat dengan hasil penelitian distilasi yang telah dilakukan. Penyelesaian numerik digunakan adalah ODE 45 pada MATLAB yang menggunakan metode Runge-Kutta.Dengan variasi penggunaan reflux ratio, dapat mempengaruhi konsentrasi pada distillat setiap waktu. Sehingga, dapat diketahui waktu yang optimal untuk memperoleh etanol dengan kadar yang diinginkan dalam distilasi batch multikomponen. Hasil sementara antara simulasi dan eksperiment mempunyai kesalahan sebesar 10%. Dari hasil distilat etanol,amly alkohol dan aseton dengan waktu 10,20,30,40,50 dan 60 menit sebesar (90%,89%,88%,86%,84% dan 80% untuk hasil distilat etanol), (0,001, 0,0012, 0,0014, 0,0015, 0,0010 dan 0,0005 untuk hasil amly alkohol) dan (0,001, 0,0007, 0,0005, 0,00051, 0,00051 dan 0,00051 untuk hasil aseton).
TINJAUAN YURIDIS PERTANGGUNGJAWABAN NEGARA TERHADAP PENCEMARAN POLUSI UDARA TRANSNASIONAL PASCA PERATIFIKASIAN AATHP (ASEAN Agreement Transboundary Haze Polution) Pratama, Riski Indra Bayu; Susianto, Susianto; Miladiyanto, Sulthon
Jurnal Panorama Hukum Vol 1 No 1 (2016): Juni
Publisher : Fakultas Hukum Universitas Kanjuruhan Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (454.696 KB) | DOI: 10.21067/jph.v1i1.1164

Abstract

Three recent decades, the problem of haze from forest fires and peatland in Indonesia become an international problem because it causes pollution in the neighboring country (transboundary pollution), so that Malaysia and Singapore protested against Indonesia on the occurrence of this problem. ASEAN as a regional organization level ASIA formulate handling pattern smoke haze pollution in Southeast Asia in an ASEAN Agreement on Transboundary Haze Pollution was signed by 10 participating countries of ASEAN, Indonesia's ratification of this agreement began in 2014 through Law No. 26 of 2014 on Ratification AATHP, because it has not been established Government Regulations Implementing Regulations treaty AATHP Indonesia to fill the legal vacuum, based pacta sun servanda and asaz jurisdictions, Indonesia in the implementation of the ratification of this treaty can use legislation related to existing, including: Act No. 32 In 2009, Law No. 24 In 2007, Law No. 41, 1999, PP 4, 2001.
MODEL KINETIKA REAKSI PEMBENTUKAN POLYOL BERBASIS MINYAK SAWIT Ifa, La; Sumarno, Sumarno; Susianto, Susianto; Mahfud, Mahfud
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 (115.839 KB) | DOI: 10.14710/reaktor.14.1.1-8

Abstract

REACTION KINETIC MODEL OF RBD PALM OIL BASED-POLYOL PRODUCTION. Polyol, a raw material of polyurethane, has successfully been produced from a renewable resource namely RBD palm oil. This polyol was made by firstly adding a peroxyacetic acid formed in situ from H2O2 and CH3COOH with H2SO4 as cataliyst into RBD palm oil to form epoxidized RBD palm oil. The epoxidized palm oil then was added to a mixture of methanol (MeOH), isopropanol (IPA), and H2SO4 for 2 hours at 60oC so that palm oil-based polyol was formed. The main equipment used in this research was a 500 mL three necked flask, equipped with a reflux condeser, thermometer, water bath and magnetic stirrer. The product was analysed using a titration method and Infra Red (IR) Spectroscopy. It was obtained that the produced palm oil-based polyol has a value of hydroxyl number of 150-209 mg KOH/g sample and a viscosity of 740.777 cP. These results are in accordance with other polyol products from other sources. The kinetic of palm oil-based kinetic was studied and the best model of the reaction rate equation was where k? = 3.399 e-2391.,6/RT.  The unit of  k is L2 mol-2 menit-1 . The average error of the equation is 4,549%.  Polyol, bahan baku polyuretan, telah berhasil dibuat dari bahan baku terbarukan yakni polyol berbasis RBD palm olein. Polyol ini mula-mula dibuat dengan menambahkan asam peroksi asetat yang dibentuk secara in situ dari H2O2 dan CH3COOH dengan katalis H2SO4 kedalam RBD palm olein untuk membentuk RBD palm olein terepoksidasi. RBD palm oil terepoksidasi ditambahkan kedalam campuran metanol (MeOH), isopropanol (IPA) dan sejumlah katalis H2SO4 selama 2 jam pada suhu 60 oC sehingga terbentuk polyol berbasis RBD palm oil. Peralatan utama yang digunakan dalam percobaan pembuatan polyol adalah labu leher tiga 500 mL dilengakapi dengan kondesor reflux, termometer, water bath dan magnetic stirrer. Polyol produk dianalisa bilangan hidroksil dengan cara titrasi dan dianalisis dengan Infra Red (IR) Spectroscopy. Polyol berbasis RBD palm oil yang dihasilkan memiliki bilangan hidroksil 150-209 mg KOH/g sampel dan viskositas 740,777 cP. hasil ini sebanding dengan polyol yang dihasilkan dari sumber minyak yang lain. Kinetika reaksi polyol berbasis RBD palm oil telah dipelajari dan hasil terbaik didekati dengan persamaan laju reaksi yang diperoleh pada penelitian adalah dimana k? = 3,399 e-23913,6/RT dalam satuan L2 mol-2 menit-1. Kesalahan estimasi rata-rata adalah 4,549%. Kata kunci: model kinetika; RBD palm oil; polyol
PENGARUH MODEL ALIRAN TERHADAP RECOVERY CO2 PADA ABSORPSI GAS CO2 OLEH LARUTAN K2CO3 DIDALAM PACKED COLUMN DENGAN KONDISI NON-ISOTHERMAL Kusnarjo, Kusnarjo; Kuswandi, Kuswandi; Susianto, Susianto; Altway, Ali
Reaktor Volume 12, Nomor 3, Juni 2009
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (317.996 KB) | DOI: 10.14710/reaktor.12.3.154 – 160

Abstract

Penelitian ini bertujuan untuk mempelajari pengaruh model aliran terhadap recovery gas pada absorpsi gas CO2 menggunakan larutan K2CO3 yang di kontakkan secara berlawanan arah (counter current) didalam packed column menggunakan packing jenis raschig ring. Penelitian dilakukan menggunakan kolom kaca berdiameter 10 cm dan tinggi 150 cm. Packing dibuat dari logam aluminium berdiameter 1,0 cm dan tinggi 2,0 cm yang mengisi bagian kolom setinggi 100 cm. Variabel penelitian ini adalah konsentrasi CO2  20% volume, dengan laju alir 10  sampai 35 l/menit dan konsentrasi  K2CO3,1M  dan 1,5M dengan laju alir 3 sampai 7,5 l/menit. Dari hasil penelitian absorpsi gas CO2 20% volume menggunakan larutan Benfield dengan model aliran non-ideal besar % recovery gas CO2 dengan larutan K2CO3 1,5M, jumlahnya lebih besar dibandingkan dengan larutan K2CO3 1M, sedangkan absorpsi CO2 dengan campuran udara 80% volume dengan model aliran non-ideal (D/uL=0,1), jumlah % recovery gas CO2 lebih kecil dibandingkan dengan aliran ideal (D/uL=0,2). Validasi antara simulasi dengan eksperimen dengan cara membandingkan kesalahan hasil penelitian menunjukkan bahwa besar % recovery CO2 secara ekperimen lebih rendah dibandingkan dengan cara simulasi. Hasil perhitungan % recovery gas CO2 menggunakan jenis aliran tidak ideal mendekati data eksperimen dengan error 6,52%.
STUDI EKSPERIMENTAL FALLING FILM EVAPORATOR PADA EVAPORASI NIRA KENTAL Fitri, Medya Ayunda; Suhadi, Suhadi; Altway, Ali; Susianto, Susianto
Journal of Research and Technology Vol 2, No 1 (2016)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (375.175 KB) | DOI: 10.5281/zenodo.2582030

Abstract

Falling film evaporator is a constructed equipment for concentrating dilute solution that are sensitive to heat flowing form a thin film. This research aims to study the evaporation of cane juice concentrated with air flow on falling film evaporator and knowing evaporation rate occured in falling film evaporator used. In the process, cane juice from plant pumped to the falling film evaporator that used in this experiment. This research used concentrated cane juice and air flow rate for variables of this experiment. Cane juice flow from top of evaporator through distributor to form thin film and air flow from the bottom of evaporator. After that, temperatur of pipe wall, inlet and outlet temperature of cane juice and air were measured. This experiment concluded that the highest concentration of outlet solution is 59 brix for liquid flow rate 154 l/h and air flow rate 10 m3/h, and the other hand inlet solution concentration 51 brix. Optimum evaporation rate is 35 kg/m2.h for 51 brix and air flow rate 10 m3/h.
PENGARUH KONSENTRASI SURFAKTAN DAN KECEPATAN PUTAR PENGADUK TERHADAP PROSES PEMISAHAN BITUMEN DARI ASBUTON Novitrie, Nora Amelia; Susianto, Susianto; Altway, Ali
Journal of Research and Technology Vol 2, No 2 (2016)
Publisher : Universitas Nahdlatul Ulama Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (65.758 KB) | DOI: 10.5281/zenodo.2581969

Abstract

Asbuton is a rock that contain the bitumen. Asbuton can be used as road construction alternatives after extracting bitumen from the mineral. A method for separating bitumen is separation process using hot water medium. The process was carried out in a stirred tank, 200 grams of asbuton was mixed with diesel oil and added by hot chemical solution (surfactant) in the digestion tank. The Separation process in the extractor was made at then the speed of stirrer were set according to the variable and time was set 30 minutes. After the complete process, the mixture was moved into a beaker glass and 500 ml hot water was added. The mixture of diesel oil and bitumen will float in the surface then the density will be measured to determine the bitumen concentration. It can be concluded that concentration of surfactant solution and speed of stirrer gave the significant results. The highest recovery percentage of bitumen is 81,99 %. Keywords: asbuton, hot water, surfactant, speed of stirrer
PERPINDAHAN PANAS DAN MASSA PENGUAPAN FALLING FILM CAMPURAN UAP-GAS METHANOL-AIR ARAH BERLAWANAN Budhikarjono, K.; Susianto, Susianto; Soewarno, N.
Reaktor Volume 09 No. 02 Desember 2005
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5461.378 KB) | DOI: 10.14710/reaktor.9.2.86-93

Abstract

Penelitian ini bertujuan mempelajari pengaruh adanya aliran gas/udara terhadap koefisien perpindahan panas dan massa dalam falling film evaporator untuk sistem larutan campuran biner, dan memperoleh persamaan empiris koefisien perpindahan panas dan massa. Penelitian dilakukan dengan menggunakan kolom tegak  sepanjang 2 meter dan diameter 2,8 cm. larutan methanol-air dan udara panas dialirkan pada kolom dengan aliran berlawanan arah. Laju alir cairan 20-160 l/jam, konsentrasi umpan sebesar 10-50% methanol dan laju alir gas 0- 2,16 standar m3/jam. Harga yang diperoleh menunjukkan bahwa koefisien perpindahan panas dipengaruhi oleh laju alir umpan dan konsentrasi larutan. Semakin esar laju alir umpan, semkin besar koefisien perpindahan panas, semakin besar konsentrasi larutan, semakin kecil koefisien perpindahan massa. Koefisien perpindahan massa yang dihasilkan berkisar antara 5,6 ? 9 Kw/ m2.K dan koefisien perpindahan massa yang dihasilkan berkisar antara 1,06- 2,73 . 10-4 m/detik untuk kisaran NRE,l 1800-6000 dab NRE,g 0-2000.Kata kunci : falling film evaporator, koefisien perpindahan panas, koefisien perpindahan massa
MODELING AND SIMULATION OF CO2 ABSORPTION INTO PROMOTED AQUEOUS POTASSIUM CARBONATE SOLUTION IN INDUSTRIAL SCALE PACKED COLUMN Altway, Ali; Susianto, Susianto; Suprapto, Suprapto; Nurkhamidah, Siti; Nisa, Nur Ihda Farihatin; Hardiyanto, Firsta; Mulya, Hendi Riesta; Altway, Saidah
Bulletin of Chemical Reaction Engineering & Catalysis 2015: BCREC Volume 10 Issue 2 Year 2015 (SCOPUS Indexed, August 2015)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (73.759 KB) | DOI: 10.9767/bcrec.10.2.7063.111-124

Abstract

Carbon dioxide gas is a harmful impurity which is corrosive and it can damage the utilities and the piping system in industries. Chemical absorption is the most economical separation method which is widely applied in chemical industries for CO2 removal process. Hot potassium carbonate (K2CO3) is the most effective solvent that has been used extensively, especially for the CO2 separation process from gas synthesis and natural gas. This paper aims to develop mathematical model for investigating the CO2 absorption into promoted hot K2CO3 solution in industrial scale packed column in an ammonia plant. The CO2 was removed from the gas stream by counter-current absorption in two stages column. To represent the gas-liquid system, a rigorous mathematical model based on the two-film theory was considered. The model consists of differential mass and heat balance and considers the interactions between mass-transfer and chemical kinetics using enhancement factor concept. Gas solubility, mass and heat transfer coefficients, reaction kinetics and equilibrium were estimated using correlations from literatures. The model was validated using plant data and was used to compute temperature and concentration profiles in the absorber. The variation of CO2 recovery with respect to changes in some operating variables was evaluated. The effect of various kinds of promoters added into K2CO3 solution on the CO2 recovery was also investigated. The simulation results agree well with the plant data. The results of the simulation prediction, for the absorber pressure of 33 atm with a lean flow rate of 32,0867 kg/h, temperature of 343 K, and semi lean flow rate of 2,514,122 kg/h, temperature of 385 K, showed %CO2 removal of 95.55%, while that of plant data is 96.8%. © 2015 BCREC UNDIP. All rights reservedReceived: 3rd July 2014; Revised: 5th January 2015; Accepted: 19th Januari 2015How to Cite: Altway, A., Susianto, S., Suprapto, S., Nurkhamidah, S., Nisa, N.I.F., Hardiyanto, F., Mulya, H.R., Altway, S. (2015). Modeling and Simulation of CO2 Absorption into Promoted Aqueous Potassium Carbonate Solution in Industrial Scale Packed Column. Bulletin of Chemical Reaction Engineering & Catalysis, 10 (2): 111-124. (doi:10.9767/bcrec.10.2.7063.111-124) Permalink/DOI: http://dx.doi.org/10.9767/bcrec.10.2.7063.111-124 
EFEK FORTIFIKASI VITAMIN B12 TERHADAP KADAR VITAMIN B12 SERUM DAN HOMOSISTEIN SERUM PADA VEGETARIAN Susianto, Susianto
Jurnal Ilmu Kesehatan Bhakti Husada: Health Sciences Journal Vol 11 No 1 (2020): Jurnal Ilmu Kesehatan Bhakti Husada: Health Science Journal
Publisher : Lembaga Penelitian Sekolah Tinggi Ilmu Kesehatan Kuningan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34305/jikbh.v11i1.150

Abstract

Introduction: Vegetarians consume plant-based foods with or without eggs and milk. Vegetarians are at risk of vitamin B12 deficiency, as natural sources of vitamin B12 are limited to animal-based foods. Vitamin B12 deficiency can lead to megaloblastic anemia, nerve damage and increase homocysteine level. Higher homocysteine level can increase the risk of coronary heart disease and stroke. The objective of this study was to investigate the effect of vitamin B12 fortification on the level of serum vitamin B12 and homocysteine in vegetarian. Method: The research design was an experimental study, community trial. The samples were 42 vegetarians with vitamin B12 deficiency (< 156 pmol/L) selected from 118 vegetarians as members of Indonesia Vegetarian Society (IVS) Pekanbaru, treated by vitamin B12 fortified oatmeal for three months from March to June 2010.  Serum vitamin B12 and homocysteine were measured by electrochemiluminescent immunoassay and microparticle enzyme immunoassay method respectively. Result: Prevalence of vitamin B12 deficiency in vegetarian was 35.6%. Statistical analysis showed a significant increase of serum vitamin B12 from 124.6 to 284.6 pmol/L (p=0.001) and significant decrease of serum homocysteine from 20.1 to 15.1 µmol/L (p=0.001). Conclusion: Consumption of vitamin B12 fortified oatmeal increases the level of serum vitamin B12 and decreases the level of serum homocysteine significantly in vegetarian with vitamin B12 deficiency.