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INDONESIA
Info-Teknik
Published by Universitas Lambung Mangkurat
ISSN : 08532508     EISSN : 24599964     DOI : http://dx.doi.org/10.20527
Core Subject : Engineering,
Engineering
Jurnal Info – Teknik menerbitkan artikel – artikel karya orisinil dan signifikan pada Bidang Rekayasa Teknik.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 420 Documents
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PENGARUH KATALISATOR BASA PADA PRODUKSI BIODIESEL DARI CAMPURAN MINYAK KEDELAI DAN MINYAK JELANTAH Primata Mardina
INFO-TEKNIK Vol 11, No 1 (2010): INFOTEKNIK VOL. 11 NO. 1 2010
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v11i1.1769

Abstract

The traditional alkali-catalyzed transesterification for the synthesis of biodiesel from the mixtures of soybean oil and waste cooking oil was carried out in a laboratory scale reactor. The effect of sodium hydroxide (NaOH) concentration as catalyst was investigated. The reaction temperature and stirring speed were maintained constant for 2 hours at 65oC and 600 rpm. For system equipped by agitation, and considered on rotational speed and length of rotor or in this case, magnetic bar, the G-force for this system was 10.06. The optimum condition was obtained at 0.75 wt% NaOH, mixing ratio of feedstock of 60%WCO-SO. The result showed increasing in the amount of NaOH gave a positive effect on a small percentage of waste cooking oil in mixture of feedstock, and negative effect on a greater percentage of waste cooking oil, it was due to that NaOH as alkali catalyst is very sensitive to qualities of feedstock, especially free fatty acid content of feedstock. Free fatty acid inhibited rate of transesterification reaction, and it caused side reaction; saponification reaction. It leads to complicated purification process and reduction of biodiesel as final product.
Karakteristik Perumahan di Tepi Sungai Martapura Tinjauan Aspek Fisik Tradisional Bani Noor Muchamad; Ira Mentayani
INFO-TEKNIK Vol 3, No 1 (2002): INFOTEKNIK VOL. 3 NO. 1 2002
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v3i1.451

Abstract

Besarnya potensi rumah tradisional kurang disadari dengan terjadinya perubahan yang pesat yang ditandai munculnya bentuk-bentuk baru semakin ditinggalkannya bentuk rumah tradisional.Penelitian ini bertujuan mengidentifikasi karakteristik perumahan yang ditinjau dari aspek fisik tradisional di tepi Sungai Martapura. Mtode analisis adalah deksriptif kuantitatif dengan alat analisis evaluasi komparatif dan statistik deskriptik sederhana. Sampel terbagi 3 lapisan jarak (0-50 m, 51-100 m, dan > 100 m) dari sungai. Kriteria sampel masih ada unsur tradisional pada fisik bangunan.Ketiga lapisan memiliki karakteristik yang sama, yaitu termasuk kategori semi tradisional. Latar belakang yang mempengaruhi adalah aspek ekonomi, pengetahuan idigenous, selera, dan aktifitas anggota keluarga. Selain itu jarak antara perumahan dengan sungai mempengaruhi perubahan terhadap dimensi panjang bangun.
ANALISIS SISTEM INFORMASI PENJUALAN BARANG KOPERASI BERBASIS WEB SEBAGAI PENDUKUNG PROGRAM PELAYANAN PRIMA Dwi Retnosari; Auliya Rahman
INFO-TEKNIK Vol 21, No 1 (2020): INFOTEKNIK VOL. 21 NO. 1 JULI 2020
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v21i1.8963

Abstract

The cooperative at Abdul Kadir Panyipatan High School is engaged in trading, which in cooperative sales procedures still has weaknesses in terms of data management and reporting of goods and transaction systems. Students who want to buy a lot of their needs in shopping have to wait a long time in the place of the cooperative, this is because the sales transaction system is still done conventionally and the financial reporting process still refers to the financial ledger. The problem solving method used is the need for procedures and web-based sales information systems using PHP programming and Mysql databases, so that data and reports can be well integrated. The result can be managing data and reports which to archive data supported by web-based information systems can support cooperative employee performance in excellent service so that it helps and facilitates the financial recapitulation process at the end of the year, so sales will be as expected.
STUDI EKSPERIMENTASI PERBANDINGAN KARAKTERISTIK CAMPURAN TANAH BERPASIR DAN KAOLIN DENGAN CARA DYNAMIC DAN STATIK COMPACTION Gawit Hidayat
INFO-TEKNIK Vol 12, No 2 (2011): INFOTEKNIK VOL. 12 NO. 2 2011
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v12i2.1803

Abstract

One of the many factors that affect the compaction is the way of its compaction, the common ways which used in laboratory are Standard and Modified Proctor. The aim of this research are to use the comparison of characteristic value of soil mixtures of Padalarang Sandy Soil and Nagrek Kaolinite in the static and dynamic compaction and find a relationship among CBR with Static and Dynamic Cone Penetrometer.This research shows that at the same condition of dry density and optimum water content the compacted soil with static way get static force 8 ton and 11 ton to close standard and modified proctor results, and also to have the characteristic values less bigger than dynamic one about 3.75% to 46.68%. This item can be shown by permeability tests and the characteristics by california bearing ratio, static and dynamic cone penetrometer. Besides the water content, the percentage of Padalarang Sandy Soil and Nagrek Kaolinite’s mixture very affect the mechanic properties such as increasing of soil against the mixture with Nagrek Kaolinite will tend decreasing  the CBR and qc  value  and   increasing N DCP value. The trend of regresion curve resulted by static and dynamic compaction is similar. The approach equations which often used are non linear equations therefore the results are in a good enough and satisfied regresion coefficient about 0.8 to 1.Based on the result of tests also show that the soil mixtures of Padalarang Sandy Soil and Nagrek Kaolinite is not stable against soaked process where can be seen with the tedency of the characteristic value can not be measured in the soaked condition.
Dampak Kerosin pada Premium Terhadap Emisi Gas CO dan HC Ditinjau dari Sistem Pengapian Kendaraan Bermotor Abdul Ghofur
INFO-TEKNIK Vol 5, No 1 (2004): INFOTEKNIK VOL. 5 NO. 1 2004
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v5i1.651

Abstract

Kendaraan bermotor sampai saat ini merupakan pencemar udara utama. Gas buang kendaraan bermotor yang cukup berbahaya adalah gas buang CO dan HC yang dihasilkan dari pembakaran di ruang bakar mesin. Percobaan dilakukan menggunakan variasi kerosin 0% sampai 5% dan variasi laju putaran mesin  dari 700 Rpm sampai 2500 Rpm. Kendaraan uji yang digunakan adalah kendaraan bermotor  dengan  sistem pengapian platina dan CDI.Tujuan penelitian ini  adalah untuk mengetahui pengaruh kerosin dalam premium terhadap konsentrasi gas CO dan HC yang dihasilkan dari sistem pengapian yang berbeda. Analisis pengujian emisi gas CO dan HC dari gas buang kendaraan bermotor dilakukan dengan pendekatan secara statistik, melalui program MINITAB  dengan menggunakan metode analisis varians dan regresi.Semakin tinggi kadar kerosin dalam premium akan meningkatkan kadar produksi  emisi gas CO dan HC. Pada laju putaran mesin mulai 1000 Rpm sampai 2500 Rpm, setelah kondisi idle terjadi peningkatan terhadap emisi gas CO dan HC. Kendaraan bermotor sistem pengapian platina dengan sistem 2 langkah menghasilkan  emisi terbesar, yaitu  saat kandungan  kerosin   5% dengan   laju putaran mesin 700 Rpm (idle)  sebesar 2,59% volume untuk gas CO dan 1079 ppm untuk gas HC. Untuk Produksi emisi terendah gas CO dan HC dihasilkan dari kendaraan bermotor sistem pengapian CDI , yaitu  pada kadar kerosin 0% dengan  laju putaran mesin 1000 Rpm sebesar 1.12% volume  untuk gas CO dan 851 ppm untuk gas HC. Kendaraan dengan sistem pengapian CDI menghasilkan emisi gas CO dan HC yang lebih baik dari sistem pengapian platina.
ANALISA GAS BUANG MESIN BERTEKNOLOGI EFI DENGAN BAHAN BAKAR PREMIUM Mustafa Bakeri; Akhmad Syarief; Ach. Kusairi S.
INFO-TEKNIK Vol 13, No 1 (2012): INFOTEKNIK VOL. 13 NO. 1 2012
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v13i1.1819

Abstract

Perkembangan ilmu pengetahuan dan teknologi telah mendorong manusia untuk menciptakan teknologi yang semakin maju. Diantara teknologi tersebut adalah pengembangan mesin kendaraan dengan sistem bahan bakar injeksi (EFI), mesin dengan sistem ini mensyaratkan penggunaan bahan bakar tanpa timbal (pertamax plus), namun kenyataannya bahan bakar dengan jenis pertamax plus sangat sulit untuk ditemukan khususnya untuk daerah perkampungan, sehingga kebanyakan masyarakat masih menggunakan bahan bakar bensin (premium). Penggunaan bahan bakar premium ini menghasilkan gas buang yang berbahaya yaitu karbon monoksida (CO) dan hidro karbon (HC) yang dihasilkan dari proses pembakaran.Berdasarkan latar belakang tersebut maka dilakukan penelitian terhadap sepeda motor sistem EFI empat langkah 150 cc dengan menggunakan bahan bakar premium pada putaran 2000, 2500 dan 3000 rpm. Tujuan penelitian ini dilakukan untuk mengetahui emisi gas buang dan temperatur oli pada sepeda motor sistem EFI.Dari hasil penelitian disimpulkan bahwa penggunaan premium pada sepeda motor sistem EFI menghasilkan CO tertinggi dengan nilai 3,04%, HC tertinggi dengan nilai 63 ppm dan temperatur oli mesin tertinggi pada 86 0C. Dengan demikian penggunaan premium pada sepeda motor sistem EFI dinyatakan aman untuk digunakan. 
PENGARUH RADIUS POJOK TERHADAP KEKASARAN PERMUKAAN PADA PRODUKSI SILINDERIS AA-6061 MENGGUNAKAN PROSES BUBUT Sudjatmiko, Sudjatmiko; Darto, Darto; Rusdijanto, Rusdijanto
INFO-TEKNIK Vol 17, No 1 (2016): INFOTEKNIK Vol. 17 No. 1 2016
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v17i1.1261

Abstract

Research machining with turning process, carried out in 6061 AA- workpiece material, using the HSS has a standard geometry. The problem is the corner radius (RCB), spindle rotation (n), the motion eat (f) and the cutting depth (a) constant to produce lathe AA-6061 with the desired surface and is capable of producing a high production capacity. The regression model can describe the relationship between the combination of cutting parameters and corner radius produces minimum surface roughness. Round spindle is a dominant effect on the surface roughness, followed by motion meal, corner radius (RCB). By using Response Surface Methodology (RSM), the alleged best regression model for surface roughness (SR) at 95% confidence level at 900 rpm spindle rotation, motion eat 115 mm / put and corner radius 1.25 mm is : 0,14x2x3. Results obtained by iterating the main influence on the conditions of rotation of 950 rpm, 90 mm motion eat / put and corner radius 1.50 mm produces the value of surface roughness( SR) 0,360 µm.
PENGARUH VARIASI LARUTAN ELEKTROLIT TERHADAP PRODUKSI BROWN’S GAS Ena Marlina
INFO-TEKNIK Vol 17, No 2 (2016): INFOTEKNIK VOL. 17 NO. 2 2016
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v17i2.2495

Abstract

The need of energy is increasing continuously and the reliance of fossil fuels is very great, looking at condition te be sure is needed a certain research which focuses to find the altenative. By conduction in hopefully the solution will be found. By separation of H2O (Water) to be Hydrogen (H2) dan Oxygen (O2) using electrolysis chemical reation, this research uses KOH and NaHCO3 catalist with the percentage of each 0; 1; 2; 3; 4 % as a trigger to compare each other in order to accelerate the H2O electrolysis process. It also uses SS 306 L electrode with tho chathode and anode number which are Wet cel. Overdel, the result in every research the percentage of KOH solution has high value because it is a good conductor and the biggets Brown’g gas which is produted is 16,33 ml/s with 231 Watt electric consumtion while if uses NaHCO3 the  Brown’g gas 12,675 ml/s with 283,08 Watt electric consumtion.
Kondisi Optimum Pemisahan Aseton dari Campuran Aseton-Etanol-Air-n–Butanol Dengan Kolom Distilasi Vacuum Chairul Irawan; Iryanti Fatyasari Nata
INFO-TEKNIK Vol 6, No 1 (2005): INFOTEKNIK VOL. 6 NO. 1 2005
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v6i1.1668

Abstract

Fermenting molasses using clostridium acetobutilycum can produce a mixture of acetone (1)/ethanol (2)/water (3)/n-butanol (4). The fermentation products are then separated and purified in a series of distillation column. In this work the products are 99.5-wt % of acetone and 99 % recovery.This work is primarily concerned with the effect of operating pressure on the distillation column performance. Distillation columns were designed using computer programs written in VISUAL FORTRAN 5.0. A rigorous equilibrium based computation method due to Wang-Henke that taking into account the effects of non-equal molar overflow and non-ideal vapor-liquid equilibrium was used in study. UNIQUAC, a method of estimating activity coefficient in non-ideal liquid mixtures, was used to model the vapor–liquid equilibrium. The column performance was studied by varying the operating pressure that is constrained by the cooling water temperature in the condenser. The numbers of plates are 50 and feed plate location at 12th plate below the condenser for acetone column. Variation of pressure 0.7 to 0.6 atm for acetone column will decrease 6.03 % reflux ratios, 4.3% condenser and 4.78% reboiler duty. Optimum condition for acetone column was 0.6 atm. 
PENGARUH PERENDAMAN (NaOH) TERHADAP KEKUATAN TARIK DAN BENDING BAHAN KOMPOSIT SERAT BAMBU TALI (GIGANTOCHLOA APUS) BERMATRIKS POLYESTER Kosjoko, Kosjoko
INFO-TEKNIK Vol 15, No 2 (2014): INFOTEKNIK VOL. 15 NO. 2 2014
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/infotek.v15i2.218

Abstract

Effect of Immersion (NaOH) bamboo fiber rope (Gigantochloa smear) for 120 minutes and the use of one-way fiber can be a problem for maximum improvement in mechanical properties of bamboo fiber composite straps. The purpose of the research, manufacture of composites made from polyester matrix reinforced with fibers type157BTQN natural bamboo, with a 5% NaOH immersion treatment, per 1 liter of distilled water for 120 minutes, to determine the mechanical properties of the composite tensile strength and bending strength with the variation of fiber volume fraction 20 %, 30%, and 40%.The method is done by arranging a one-way natural fiber bamboo fiber with polyester matrix type 157 BTQN with variation of fiber volume fraction of 20%, 30%, and 40%. Hardener used is MEKPO with a concentration of 5% NaOH. Composites are made by hand lay-up method. The main variable is the study of variation of fiber volume fraction of 20%, 30%, and 40%, with 5 grams of soaking treatments per 1 liter of distilled water NaOH for 120 minutes. Specimens and tensile and bending test procedures refer to standard ASTM D 638-03 and ASTM 790-03.The results of this study indicate that the addition of fiber volume fraction of 20%, 30%, 40% and 5% NaOH immersion treatment, per 1 liter of distilled water may increase the interfacial adhesion between the fiber and matrix. The highest tensile strength at 5% NaOH immersion treatment for 120 minutes of natural bamboo fiber composite with 40% volume fraction of 42 kN/mm2, for NaOH and without treatment with 40% volume fraction of 13 kN/mm2. While the highest Bending strength of bamboo fiber composite immersion in 5% NaOH treatment for 120 minutes with 40% volume fraction of 15.4 kN/mm2, for 40% volume fraction of 5.7 kN/mm2 without treatment. Keywords: bamboo fiber rope (Gigantochloa lear), NaOH, polyester, tensile strength and bending strength.

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