Jurnal Online Teknologi Industri (UMI FTI - Fakultas Teknologi Industri, Universitas Muslim Indonesia Makassar)
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Blending Batubara Dengan Limbah Biomassa Tongkol Jagung Untuk Mengurangi Ketergantungan Sumber Energi Tidak Terbarukan
Get PDFCadangan batubara sebagai sumber energi tidak terbarukan semakin menipis. Untuk mengurangi laju pemakaian bahan bakar batubara maka dilakukan penelitian blending batubara dengan sumber energi terbarukan berupa biomassa seperti tongkol jagung. Dalam penelitian ini diamati pengaruh rasio tongkol jagung terhadap batubara untuk mendapatkan kualitas campuran bahan bakar terbaik yang memenuhi syarat untuk diaplikasikan pada industri dan pembangkit listrik. Parameter kualitas campuran batubara dan tongkol jagung yang diamati adalah nilai kalor dan kadar sulfur. Bahan bakar batubara yang digunakan dalam penelitian ini memiliki nilai kalor 8403 cal/gram dan kadar sulfur 0.71%. Sedangkan tongkol jagung memiliki nilai kalor 3409.64 cal/gram dan kadar sulfur 0.14%. Dari penelitian ini diperoleh pencampuran terbaik dengan rasio tongkol jagung terhadap batubara sebesar 75% yang memberikan nilai kalor 4741.54 cal/gram dan kadar sulfur 0.26%. Kualitas pencampuran batubara dan tongkol jagung ini memenuhi syarat untuk diaplikasikan pada Pembangkit Listrik Tenaga Uap (PLTU). Pemanfaatan hasil pencampuran bahan bakar ini dapat mengurangi laju pemakaian batubara sebanyak 75%.
COMPARING USBILITY SATISFACTION OF GOOGLE MEET AND ZOOM MEETING APPLICATION: CUSTOMER SATISFACTION INDEX AND GAP ANALYSIS CASE STUDY AT K UNIVERSITY
Get PDFWith the policy of learning from home, the role of information technology become more important. The use of technology in online learning can provide new learning experiences for students. There are several online learning application platforms available and the most popular platforms are Zoom Meeting application and Google Meet. In using the online learning platform, usability aspect is one the most important things. Usability is a measure of the quality of the user experience when interacting with the user-operated device application with the perceived expectations. The purpose of this study is to compare usability satisfaction of Google Meet and Zoom Meeting application using Customer Satisfaction Index (CSI) and GAP analysis. The Customer Satisfaction Index is measured from the five usability aspects of learnability, efficiency, memorability, errors, and satisfaction. Meanwhile, the GAP Analysis is measured based on the perception and expectations of the user of Google Meet and Zoom Meeting application. The result shows that Google Meet has a higher level of usability satisfaction compared to Zoom Meeting application. Google Meet has a usability satisfaction level of 84.29%, meanwhile Zoom Meeting has a usability satisfaction level of 76.67%. The results of GAP analysis on both platforms show that the users made a lot of errors when using Google Meet and find it difficult when using Zoom Meeting application for the first time
Analisis Pemanfaatan Briket Tempurung Kenari Sebagai bahan Bakar
No full textWalnuts is one of the bio-masses whose quantity is quite abundant but its use has not been optimized. One of them is the walnut shell as one of the fuel replacement solutions which is increasingly thinning. This study aims to produce walnut shell briquettes that have economic value and are able to replace or equal to coal briquettes. The briquettes are grouped in 3 samples. Sample I with a composition of 100% walnut shell, sample II with a composition of 50%: 50% between shell walnuts with coal while sample III with a composition of 100% coal. Furthermore, for samples with walnut shell compositions, sample I and sample II are divided into 3 sizes, namely mesh 28, mesh 65 and mesh 80. In the first sample is a benchmark for samples II and III that will be seen by each composition they have like nilia calories, ash content, total sulfur flying content and water content. The process of making briquettes with 250 gr walnut shell composition, 50 gr tapioca flour and 100 ml water. From the results of this study, the authors get the results that canary shell briquettes are able to compete and replace coal briquettes can be seen in the grain size of 65 walnut shell briquettes
Pengaruh Fraksi Ukuran dan pH Pada Flotasi Mineral Sulfida
No full textThe ore used in this study is galena ore (PbS) which is a type of sulfide mineral. In this experiment, several variations of important variables were carried out. The variables that were varied namely: feed size fraction with a range of 140 - 325 mesh (105 - 44 microns), pulp pH between 7 – 11, and retention time between 3 - 8 minutes. The experimental results show that the smaller the feed size, the Pb content (%) tends to increase, For the pH of the pulp, the best Pb content was at pH 9.5. The higher the pH the bubbles formed tended to be stable so that the material was perfectly lifted to the surface. The best flotation time was obtained at 6.5 minutes. Retention time greatly affects the effectiveness of the reagents used in the flotation process. Best on experiments, The best condition is at the size of -200 + 230 mesh, pH of the pulp 9,5 with retention time 6,5 minutes with a Pb content of 27%.
Identifikasi Sebaran Batugamping Menggunakan Data Citra Landsat 8 Di Pulau Buton Bagian Selatan
No full textIndonesia memiliki potensi bahan galian industri cukup besar dan tersebar hampir di seluruh wilayah Indonesia. Pulau Buton yang terletak di salah satu lengan Sulawesi bagian tenggara adalah salah satu wilayah Indonesia yang memiliki potensi batugamping cukup besar, batugamping terumbu tersebut telah mengalami proses geologi hingga terangkat 700 m ke permukaan. Tujuan penelitian ini adalah untuk mengidentifikasi sebaran batugamping dengan menggunakan data Citra Landsat 8 OLI (Operational Land Imager). Penelitian ini dilakukan dengan mengolah data Citra Landsat 8 kemudian dianalisis dan dilakukan beberapa metode interpretasi sehingga sebaran batugamping dapat teridentifikasi dengan baik. Metode interpretasi yang digunakan pada Citra Landsat 8 adalah metode composite band RGB (Red Green Blue), band ratios, dan band spectral. Pada data Citra Landsat 8, metode interpretasi yang dilakukan didapatkan dua klasifikasi sebaran batugamping yaitu sebaran batugamping potensi tinggi dan sebaran batugamping potensi rendah. Setelah pengolahan data Citra Landsat 8, penelitian ini juga melakukan pengecekan langsung di lapangan untuk mendukung keberhasilan dari hasil interpretasi yang dilakukan. Penelitian ini memiliki implikasi yang cukup besar untuk memanfaatkan data Citra Landsat 8 untuk tujuan eksplorasi lebih lanjut
Optimalisasi Kinerja Pompa Centrifugal Multiflo MF 420EX In Open Pit Mines
No full textDalam banyak aplikasi lapangan telah melakukan penyaliran pompa tambang dengan dasar teknik pertambangan saja tanpa memahami dasar-dasar pompa tambang seperti kemampuan pompa itu sendiri, pembacaan kurva pada masing masing pompa itu sendiri, moyoritas dunia tambang saat ini hanya mementingkan air keluar sehingga life time pada pompa itu sendiri menjadi singkat dan tidak terukur. Penelitian ini dilakukan studi survey disalah satu mining terbuka site asam-asam coal project utnuk dapatkan data sistim pemompaan untuk di analisa. Tujuan penelitian ini adalah mengetahui desain perhitungan head loss pada pipa dan daya konsumsi bahan bakar pada sistim pemompaan dengan multiflow MF 420EX untuk mendapatkan penggunaan pompa yang efisien. Hasil dari penelitian nilai diperoleh total head loss (HDPE) awal proyek 133,39 m dan target diahhir proyek sebesar 162,75m. Untuk daya komsumsi bahan bakar awal sebesar 96,80 liter/jam dan target 118,79 liter/jam, dengan nilai tersebut dapat dijadikan dasar acuan perhitungan pemompaan yang akurat sesuai dengan anggaran yang direncanakan
Analisis Kestabilan Lereng Metode Morgenstern-Price Jalan Poros Malino - Sinjai Kabupaten Gowa
No full textMalino-Sinjai Road, Gowa Regency is an area that is prone to landslides in the rainy season, where the geological condition is in the form of Baturape-Cindako Volcano unit, namely volcanic rock of Pliocene. The research location is located on Malino-Sinjai Road Km ± 54 Parangloe District and Km ± 71 Tinggi Moncong District, Gowa Regency, the average slope of the study area is 45 °. The purpose of this research is to conduct geological engineering observations on the slopes in the form of lithological conditions, and discontinuous areas on the slopes. Conduct slope stability analysis using software using the Morgenstern-Price method, and provide technical or design recommendations for the observed slope conditions. The research methodology uses primary data, namely data from observations of engineering geology and geometry of the slopes, as well as secondary data in the form of data from previous studies, books and also the results of laboratory tests of physical and mechanical properties of rocks. The results of the study obtained technical geological observation data that on the slope (A) which is located on Malino-Sinjai Road Km ± 54 Parangloe District in the form of basalt rock has a high level of weathering characterized by an average joint distance of 9 cm and the condition of the top of the slope area has been become residual soil, while on the slope (B) which is located on Malino-Sinjai Road Km ± 71 Kecamatan Tinggi Moncong in the form of tuff rock, the level of weathering is still in the mildly weathered category and the solid condition is not visible. Based on the results of interpretation using the Morgenstern-Price method, the slope safety factor value (A) is FK 1.101 which is considered unstable based on the minimum standard of slope safety factor of the Ministry of Public Works in 2014 which is 1.25. On the slope (B) the safety factor value is obtained, namely FK 1.371, where the slope is considered stable or safe. As for technical or design recommendations to prevent ground shaking, the slope (A) can use retaining walls or retaining walls and for slopes (B) use wire mesh or wire nets around the observation slope
Karakterisasi Batubara Formasi Walanae Daerah Kaloling Kabupaten Sinjai Propinsi Sulawesi Selatan
No full textCoal is a unique sedimentary rock, both in the process of formation and rock characteristics which are strongly influenced by the conditions of the depositional environment. Different depositional environments, the characteristics of the coal are different. The research method used in this research in the field is in the form of direct sampling in the field using the channel sampling ply by ply method, namely sampling by making channels on coal outcrops and taking samples that represent the lower, middle and upper layers of the coal seam to determine the average characteristics. The sample is then prepared to get a certain size and can be representative of the field sample. The prepared samples were then subjected to a proximate test to determine the moisture content, ash content, volatile matter and fixed carbon. Laboratory tests are carried out in the Lab. Analysis and Processing Hasanuddin University Makassar. The results of the proximate analysis carried out show the coal characteristics of the Walanae Formation in the Kaloling Region which has a moisture content value that decreases from bottom to top with an average of 7.49%; coal ash content increased from bottom to top with an average value of 47.63% ash content; the value of volatile matter decreased from bottom to top with an average of 26.56% of volatile matter; and the value of fixed carbon which increases with increasing depth with an average value of 18.29%
OPTIMIZATION OF MAKING LIQUID SMOKE FROM COCONUT SHELL AS ORGANIC DISINFECTANT USING TAGUCHI METHOD
Get PDFLiquid smoke is effective as a disinfectant Contains anti-bacterial activity. Liquid smoke has the ability to inhibit bacterial growth because it contains phenolic compounds that can bind to bacterial proteins through hydrogen bonds, causing the protein structure to be damaged. Phenol can be found in a variety of consumer products including mouthwash. Phenol is irritating and corrosive to skin and mucous membranes. The shell liquid smoke product containing phenol and acetic acid has an effectiveness comparable to 70% alcohol to be used as a disinfectant at a phenol concentration of 12.5% and is safe to be used as a disinfectant. In the process of making liquid smoke, The quality of liquid smoke is influenced by the pyrolysis temperature, burning time, condensation temperature and dry shell, so that the optimization of the process of making quality coconut shell liquid smoke is made as an organic disinfectant using the Taguchi method, to achieve the specified percentage target so as to produce process standards. The method used is the taguchi . quality control method which combines level factors, namely the pyrolysis temperature factor, burning time, condensation temperature, and shell drying. The optimal results obtained were phenol compounds at rank 1 (A3) process (pyrolysis temperature 1800≤T≤ 2100) , rank 2 (B3) (pyrolysis time 5 hours), rank 3 (D2) (2 days shell drying time) and rank 4 (C1) (condensation temperature 300). And to be used as a disinfectant at a phenol concentration of 12.5% or close to the standard process (A3) (pyrolysis temperature 1800≤T≤ 2100), (B1) (pyrolysis time 1 hour), (C3) (condensation temperature 400) and (D1) (long drying shell 0 days)
INVENTORY CONTROL OF BROWN PAPER RAW MATERIALS USING THE MATERIAL REQUIREMENT PLANNING METHOD IN PAPER COMPANY
Get PDFInventory of raw materials is an essential element in the production process. The research was conducted in a paper company with different product demand problems each period, resulting in excessive raw material inventory in the warehouse and high inventory costs. Material Requirement Planning (MRP) is the right system to deal with uncertainty when planning raw material requirements. The lotting techniques used in this study are Lot For Lot (LFL), Economic Order Quantity (EOQ), and Fixed Period Requirements (FPR). For January 2021 - March 2022, the LFL lot size MRP method resulted in the smallest total inventory cost of Rp 92.228.707.169 and managed to save 9.2% of costs compared to the company's actual costs. Inventory control with LFL lot size for April 2022 – June 2023 requires 14 orders with the DSOCC raw material inventory 11.865.136,77 kg; OCC 5.256.037,55 kg; NDLKCA 4.262.881,19 kg; local box 3.340.998,93 kg and the total cost of inventory is Rp 110.075.072.816,1