Jurnal Online Teknologi Industri (UMI FTI - Fakultas Teknologi Industri, Universitas Muslim Indonesia Makassar)
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ARABICA COFFEE PRODUCTIVITY IMPROVEMENT STRATEGY WITH VALUE CHAIN ANALYSIS APPROACH (CASE STUDY: SAPAN VILLAGE, NORTH TORAJA
Get PDFCoffee is a farm commodity that has an important role in economic activities in Indonesia. The Indonesian coffee sector is dominated by small producers. North Toraja Regency, including in Sapan Village, is known as a producer of high quality coffee but low production. This study aims to examine the strategy of increasing coffee productivity in Sapan Village using value chain analysis. Data were collected through observation and interviews with cultivators in the value chain. This study shows that the productivity of coffee produced is still relatively low. The basic cause of low coffee productivity is that cultivation techniques are not good because information on good agriculture practices is still limited and there is a thought that the selling price of coffee is still low. To increase productivity, farmers need the role of the government. Farmers need counseling on coffee cultivation techniques that are in accordance with the application of GAP and price transparency from the government. If farmers have applied coffee cultivation techniques well, coffee productivity will increase so that farmers' income will also increase
Analisa Tegangan Panas Housing Batang Kendali Reaktor Nuklir Dalam Batas Desain SA403X
Get PDFInti SariBatang kendali reaktor Nuklir adalah satu komponen yang digunakan untuk mengendalikan populasi netron yang beredar dalam teras reaktor nuklir. Untuk memenuhi desain PLTN tipe PWR perlu dibuat sebuah prototype housing batang kendali. Oleh karena itu dalam rangka pembuatan prototype housing batang kendali di perlukan sebuah pradesain yaitu berupa pemodelan integritas housing batang kendali dengan mmenggunakan metode element hingga. Simulasi perpindahan panas dan mekanik pada housing batang kendali reaktor nuklir tipe PWR telah dilakukan menggunakan metode elemen hingga dengan bantuan perangkat lunak Ansys. Simulasi ini dilakukan untuk mengetahui distribusi temperatur selama operasi dan distribusi tegangan vonmisses pada kondisi tegangan panas yang terjadi pada housing batang kendali reaktor dengan tujuan untuk mengetahui integritas strukturnya. Simulasi dilakukan dengan kondisi temperatur operasi 280 ºC dan tekanan 15 MPa dan adanya faktor konveksi pada temperatur 60 ºC serta pada kondisi unsteady state. Dalam simulasi di dapatkan hasil bahwa distribusi temperatur pada housing batang kendali berada pada range 170 ºC – 280 ºC dengan distribusi tegangan Vonmises pada tegangan panas paling rendah adalah 2 MPa dan tegangan Vonmises pada tegangan panas tertinggi sebesar 217 MPa. Dengan menggunakan teori kegagalan tegangan luluh dan distorsi energi maka tegangan panas (dalan vonmises) yang ada pada housing batang kendali masih dalam batas aman karena tegangan yang terjadi masih di bawah tegangan luluh dari bahan SA403X. AbstractControl rod nuclear reactor is one of part for control of netron population in core reactor. To fulfill the requirement PWR type nuclear power plant design, it is necessary to make a prototype control rod housing. Therefore, in order to manufacture a control rod housing prototype, a pre-design is needed, namely modeling the integrity of the control rod housing using the finite element method. Simulation of heat transfer and mechanics on the control rod housing of the PWR type nuclear reactor has been carried out using the finite element method with the help of Ansys software. This simulation was carried out to determine the temperature distribution during operation and the distribution of the Vonmisses stress in thermal stress condition that occurred in the reactor control rod housing in order to determine the structural integrity. Simulationswere carried out with operating temperature conditions of 280 ºC and pressure of 15 MPa and the presence of a convection factor at a temperature of 60 C and in unsteady state conditions. In the simulation, it is found that the temperature distribution in the control rod housing is in the range of 170 ºC – 280 ºC with the lowest Vonmises stress in thermal stress condition distribution is 2 MPa and the highest Vonmises stress is 217 MPa. By using the failure theory of yield stress and energy distortion, the stress on the control rod housing is still within safe limits because the stress that occurs is still below the yield stress of the SA403X material
Karakteristik Alterasi dan Mineralisasi Endapan Emas Tipe Carlin pada Blok Yance dan Leon, Kecamatan Ratatotok, Kabupaten Minahasa Tenggara, Provinsi Sulawesi Utara
No full textStudy of gold deposit in Mesel, Ratatotok, North Sulawesi has been conducted by numerous experts, but there has been no detailed research on other prospects near Mesel, like Yance and Leon where this study is conducted. The objectives of this study is to determine the differences in the characteristics of hydrothermal alteration and ore mineralization in the Yance and Leon Prospects. Core sample description, microscopic analyses (petrography, ore microscopy), X-Ray Diffraction, and SEM-EDX are the methods used to identify those characteristics. The results of these analyses indicate that limestone and collapse breccia controlled alteration and mineralization in this area. Hydrothermal alteration that are developed in this area are silicification, silica-calcite, illitesmectite- chlorite±calcite. Ore minerals are found as dissemination, replacement, and open-space fill, such as pyrite, arsenopyrite, realgar, orpiment, hematite, and goethite, with gangue minerals such as quartz, calcite, dolomite, gypsum, chlorite, kaolinite, illite, smectite, and rhomboclase. Analysis on mineral chemistry identify numerous elements, essentially Fe, S, As, Cu, Au, Ag, Sb, Cd, Co, and Ni where average Co content is higher than average Ni. The difference in characteristics between the two research sites is that the source rock of the Yance Block has limestone lithology and polymyctite breccia, while in the Leon Block the source rock is limestone. Alterations that have developed in the Yance Block include decalcification, silicification, silica-calcite, and illit-smectite-chlorite±calcite with replacement-type and open-space fillingmineralization, while in theLeon Block is silicification, silica-calcite. , and illite-smectite-chlorite±calcite with the dominant type of replacement mineralization. The ore minerals found in the Yance Block include pyrite, arsenopyrite, realgar, orpimen, hematite, goethite, while in the Leon Block they are pyrite and hematite
Analisis Perbandingan Kadar MgO Dan SiO2 Pada Nikel Kadar Rendah di Kabupaten Kolaka dan Kabupaten Kolaka Utara
No full textPenelitian mengenai kadar mineral atau unsur lain dalam endapan nikel seperti MgO dan SiO2 pada bijih nikel kadar rendah saat ini masih sangat jarang dilakukan, sehingga diperlukan penelitian untuk menganalisis persentase kadar MgO dan SiO2 pada endapan nikel kadar rendah khususnya nikel kadar rendah yang berasal dari Kabupaten Kolaka dan Kabupaten Kolaka Utara. Penelitian ini bertujuan untuk menganalisis dan membandingkan hasil pengujian XRF pada sampel nikel Kabupaten Kolaka dan sampel nikel Kabupaten Kolaka Utara. Selain itu, penelitian dilakukan dengan observasi langsung di lapangan, tepatnya di Stockpile yang terdapat di salah satu perusahaan tambang nikel yang berada di Kabupaten Kolaka dan Kabupaten Kolaka Utara. Hasil penelitian ini dapat disimpulkan bahwa kandungan MgO sampel nikel dari Kabupaten Kolaka menunjukkan nilai persentase yang lebih kecil yaitu 11,22%, dibandingkan sampel nikel dari Kabupaten Kolaka Utara yang mencapai 18,49%. Sedangkan kadar SiO2 sampel nikel yang berasal dari Kabupaten Kolaka menunjukkan nilai persentase yang lebih tinggi yaitu sebesar 44,00%, dibandingkan kadar SiO2 pada sampel nikel yang berasal dari Kabupaten Kolaka Utara yang berkisar 36,74%. Ditinjau dari tipe endapan untuk pembentukan laterit, Kolaka terindikasi sebagai tipe Oxides Deposit dan Kolaka Utara terindikasi sebagai tipe Hydrous Silicate Deposit
ANALYSIS OF QUALITY CONTROL OF T-SHIRT SCREEN PRINTING PRODUCTS WITH SIX SIGMA DMAIC METHOD ON CV. MACCA CLOTHING.
Get PDFCV. Macca Clothing is a company engaged in Clothing screen printing. The resulting product is a short sleeve t-shirt screen printing. In producing the production, on average per month there are defective products of 6% types of defects, namely blurred colors, wrong colors, and wrong screen printing. Therefore, this study aims to providelevels sigma and DPMOand then analyze the factors causing disability and provide suggestions for improvements to reduce defective products at CVMacca Clothing. The data collection method used is to conduct interviews with CV.Macca Clothing. Then in analyzing the data using the method DMAIC and theapproach six sigma.From the research results, thevalue DPMO is 21,000 and the conversion result is 3.53, which means that out of a million opportunities there will be 3.53 possibilities for the production process to produce defective products. in thelevel stage sigma CV.Macca Clothing has not yet reached thelevel Six Sigma, but it is still in the average industrial condition because in the production process there are still product defects that have not reached zero defect. The factors that cause defects in the product are the operator is not careful in doing the work, the quality of raw materials is not good, the cleanliness of the equipment is not maintained, and the production room facilities are inadequate. From the results of the analysis based on the implementation tools kaizen , the control and improvement to reduce defects that must be carried out by CV.Macca Clothing is to carry out stricter supervision or control, carry out regular machine maintenance, and provide complete facilities.
Geologi Dan Mineralisasi Endapan Emas Orogenik Di Gunung Lipan, Kecamatan Rorowatu, Kabupaten Bombana, Sulawesi Tenggara, Indonesia
No full textThe prospect of Gunung Lipan is located in Rorowatu District, Bombana Regency, Southeast Sulawesi Province. Physiographically it is situated in the Rumbia mountains, which is occupied by the metamorphic rocks of Pompageo complex. The Gunung Lipan is a prospect which has potential to produce gold mineralization in the Rumbia Mountains. However, a detailed research has never been carried out, in which the latest research is still on regional scale. Therefore, this study aims to understand more details about the geological conditions, alteration types and mineralization characteristics of the prospect and its surroundings. The research methods include geological mapping, petrographic analysis to determine type of hostrock, ore microscopy analysis to determine sulfide minerals in rocks/veins, and ore geochemistry to determine metal content in rocks and veins. Gold mineralization in the Gunung Lipan is hosted by mica schist, and controlled by sinistral shear fault in form of shear zone. The fault movement in the field is indicated by the presence of a milonite structure in the rock and the texture of mica fish on microscopic observations. The hydrothermal alteration appears at the study area is a typical type of alteration found in orogenic gold deposits such as silicification, carbonatization, and carbonization, argillic and propylitic. The sulfide minerals of orogenic type of gold deposit occurred in this study consist of stibnite, sinnabar, tripuhyite, pyrite, arsenopyrite, and hematite. Sulphide minerals are present in rocks and veins in disseminated form. Based on the results of geochemical analysis of gold content ranging from 0.005 ppm to 1.25 ppm, high grade gold was found in quartz veins that cross-cut foliation and veins with brecciated texture. Correlation of metallic elements using multivariate statistical methods shows that gold is positively correlated with As, Sb, and Hg, negatively correlated with Ag, and base metal elements (Pb, Zn, and Cu) are not abundant and are depleted when there is an increase in degree of metamorphism, which obviously implies a typical characteristics of orogenic gold deposit
Geokimia Granodiorit Latuppa Sulawesi Selatan
No full textSARI Lokasi penelitian Latuppa terletakdi Kecamatan Mungkajang, Palopo Sulawesi Selatan, merupakan daerah yang cukup penting untuk diteliti batuannya oleh karena dapat mengindikasikan keberadaan mineral yang cukup potensi untuk di tambang sebagai mineral yang ekonomis. Penelitian ini dimaksudkan untuk membuat analisis mencakup Petrogenesa dan Geotektonik Batuan Granodiorit. Berdasarkan analisis yang telah dilakukan secara megaskopis dan petrografi batuan granodiorite, tesktur kristanilitas holokristaslin, granularitas faneritik, fabrik bentuk euhedral-subhedral, relasi equigranular, struktur masif. Berdasarkan plotting kesebandingan berat (%) K2O dan SiO2 pada klasifikasi afinitas magma, maka seri magma yaitu High K Calc–Alkaline. Berdasarkan komposisi dari SiO2 dan Na2O + K2O bahwa jenis batuannya termasuk Granodiorit pada daerah penelitian termasuk ke dalam jenis peraluminious dan S-Type Granit, berdasarkan geokimia dan petrografi batuan granodiorit Latuppa terbentuk pada active continental margin
COMPARATIVE ANALYSIS OF WORK EFFICIENCY MEASUREMENTS IN THE WIRE HARNESS INDUSTRY
Get PDFPT XYZ is a company engaged in the wiring harness assembly industry that supplies products to automotive companies in Indonesia. The product of this company is a variant of the part number wiring harness, each of which has a different processing time and employee needs in the assembly process. In the production process for Part No 22-66779-00, PT XYZ divides the work line into three parts, namely the head assembly process (assembly of the product head), the body (assembly of the product body), and the end (assembly of the product tail). The work is conducted based on these parts by many manpower. The problem is that because social distancing is applied, work efficiency in each production line becomes less than optimal. Work productivity decreases and the finished product is past its delivery deadline. In this study, we analyze two scenarios of assembly work on wire harness products. The first scenario is to assemble the head, body, and end separately as PT XYZ has done in the field. While the second scenario is to assemble the heads separately and then carry out the assembly process with the assembly results from the body and end lines (mix body and end). It is resulting in a more efficient assembly process with a lack of time used. The transformation makes improved total time in all the activity processes faster in 2756.38 seconds. The productivity has an increase of 10% than using scenario 1.
ANALYSIS OF FISH DELIVERY IN PANDEGLANG BANTEN: A CASE STUDY OF LABUAN FISH AUCTIONS
Get PDFFishery commodities are one of the categories of goods that are easily damaged so that quality is maintained as a key factor in shipping goods. This research analyze on the scheme of determining the mode of transportation using Break Even Point (BEP) and analyzing the optimization of the route by minimizing the distance traveled by using the Traveling Salesman Problem (TSP) method. The results of this research is optimizing the mode of transportation using private modes with the number of trips under 576 trips and the optimal route of travel that is Pandeglang-Jakarta-Bogor-Pelabuhan Ratu-Pandeglang of 408 Km.
Produksi Biogas dari Kotoran Sapi dengan Biodigester Kontinyu dan Batch: Review
Get PDFSumber energi terbarukan perlu terus dikembangkan untuk menekan ketersediaan bahan bakar fosil yang sudah semakin menipis. Biogas merupakan salah satu energi alternatif dengan memanfaatkan limbah organik seperti kotoran sapi. Pengolahan kotoran sapi sebagai bahan baku biogas dapat menggunakan biodigester tipe kontinyu dan tipe batch. Biodigester kontinyu selalu berisi 80% umpan dari volume total (50 liter) dan 20% sisanya sebagai ruang gas. Biodigester tipe batch kapasitas 220 liter memiliki komposisi kotoran sapi dan rumput gajah sebesar 25 kg : 25 kg dengan penambahan air 100 liter. Produksi biogas dilakukan selama 70 hari. Hasil penelitian menunjukkan bahwa biodigester kontinyu menghasilkan volume biogas total 17.520 ml dan kandungan CH4 51,37%, sedangkan untuk biodigester batch menghasilkan volume biogas total 66.484 ml dan kandungan CH4 31,37%. Uji nyala untuk biodigester kontinyu menunjukkan bahwa setelah hari ke-12 nyala api berwarna biru dan menyembur cukup kuat pada saat katup pengaturan gas dibuka dan dikenakan api, tetapi pada biodigester batch tidak menghasilkan nyala api karena kadar CH4 kurang dari 45%. Biodigester tipe kontinyu dengan kapasitas 50 L menghasilkan volume biogas lebih tinggi dibandingkan dengan tipe batch yang berkapasitas 220 literSumber energi terbarukan perlu terus dikembangkan untuk menekan ketersediaan bahan bakar fosil yang sudah semakin menipis. Biogas merupakan salah satu energi alternatif dengan memanfaatkan limbah organik seperti kotoran sapi. Pengolahan kotoran sapi sebagai bahan baku biogas dapat menggunakan biodigester tipe kontinyu dan tipe batch. Biodigester kontinyu selalu berisi 80% umpan dari volume total (50 liter) dan 20% sisanya sebagai ruang gas. Biodigester tipe batch kapasitas 220 liter memiliki komposisi kotoran sapi dan rumput gajah sebesar 25 kg : 25 kg dengan penambahan air 100 liter. Produksi biogas dilakukan selama 70 hari. Hasil penelitian menunjukkan bahwa biodigester kontinyu menghasilkan volume biogas total 17.520 ml dan kandungan CH4 51,37%, sedangkan untuk biodigester batch menghasilkan volume biogas total 66.484 ml dan kandungan CH4 31,37%. Uji nyala untuk biodigester kontinyu menunjukkan bahwa setelah hari ke-12 nyala api berwarna biru dan menyembur cukup kuat pada saat katup pengaturan gas dibuka dan dikenakan api, tetapi pada biodigester batch tidak menghasilkan nyala api karena kadar CH4 kurang dari 45%. Biodigester tipe kontinyu dengan kapasitas 50 L menghasilkan volume biogas lebih tinggi dibandingkan dengan tipe batch yang berkapasitas 220 liter