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KURVATEK
Published by Institut Teknologi Nasional Yogyakarta
ISSN : -     EISSN : 24777870     DOI : https://doi.org/10.33579/krvtk.v4i1
Core Subject : Science, Social, Engineering,
Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Social Sciences
Jurnal KURVATEK diterbitkan pertama kali tahun 2016 oleh Pusat Penelitian dan Pengabdian masyarakat pada Sekolah Tinggi Teknologi Nasional Yogyakarta. Jurnal ini mempunyai misi sebagai media pengembangan ilmu pengetahuan dan teknologi dalam bidang geologi, pertambangan, elektro, sipil, material teknik,konversi energi, enegi terbarukan, serta perencanaan wilayah dan kota. Area tulisan dalam jurnal ini cukup luas. Cakupan penulisan mulai dari kajian pustaka maupun ekperimen yang ditulis dengan kaidah-kaidah penulisan ilmiah yang baik dan benar.
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 265 Documents
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KARAKTERISTIK BATUAN ASAL (BEDROCK) PEMBENTUKAN NIKEL LATERIT PADA DAERAH X DAN SEKITARNYA KABUPATEN MOROWALI UTARA SULAWESI TENGAH Andarias Biney; Amara Nugraheni; Herning Dyah Kusuma Wijayanti
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3166

Abstract

Abstract Administratively, the research area is included in North Morowali Regency, Central Sulawesi Province, Central Java Province, which is in the 49 S zone with UTM (Universal Transverse Mercator) coordinates 9152800 – 9152800 400800 - 406800 mE with an area of ​​± 54 km2 (9 km x 6 km). ). One of the factors that influence the formation of laterite nickel deposits is the source rock. The purpose of this research is to focus on the characteristics of the original rock, namely ultramafic rock based on the intensity of serpentinization, its constituent minerals, and its relation to the laterization potential of nickel deposits in area X and its surroundings, North Morowali Regency, Central Sulawesi. The research method used is literature study, field activities (surface mapping), data processing (laboratory analysis and studio analysis), and report generation. Based on megascopic data, the research area consists of three units, namely alluvial units, peridotite rock units and limestone units. Based on petrographic analysis, the characteristics of the original rock in 10 rock samples were dominated by dunite and followed by serpentinized dunite, harzburgite, lerzolite, wehrlite, and serpentinite. The main mineral compositions in the rock are olivine, clinopyroxene, orthopyroxene, and group serpentine (antigorite, lizardite and talc). Laterite distribution in the research area is dominated by rocky laterite and laterite, with the prospect area being in the eastern part of the study area. The distribution of serpentinization zones based on the intensity level of serpentine minerals in the rock, found in the western hills is dominated by very low-medium serpentinization, while the eastern hills are dominated by low-high serpentinization. Key words : Origin Rock, Laterite, North Morowali, Petrography, Serpentinization
DETERMINATION OF COAL RANKING BASED ON MACERAL ANALYSIS IN TANJUNG BELIT REGION, DHARMASRAYA REGENCY, WEST SUMATERA PROVINCE Obrin Trianda; Paramitha Tedja Trisnaning; Rizqi Prastowo; Hurien Helmi
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3169

Abstract

Daerah penelitian berada pada Desa Tanjung Belit, Kabupaten Dharmasraya, Sumatera Barat yang termasuk dalam Cekungan Sumatera Selatan, Sub-Cekungan Jambi. Metode penelitian berupa pemetaan dan pengambilan conto sampel batubara yang dilakukan sebagai dasar analisa maseral dan piroksimat. Berdasarkan dari hasil analisis maseral, pada daerah penelitian dapat dibedakan menjadi dua seam batubara, yaitu Seam A dan Seam B. Hasil analisis RV (Refletan Vitrinite), Seam A batubara mempunyai nilai 0,47% yang menunjukkan hasil kalori batubara seam A berupa High Volatile Bituminous C. Seam B memiliki nilai RV sebesar 0,39% – 0,46% yang menunjukkan nilai kalori berupa Sub Bituminous. Hasil analisis maseral Seam A dan Seam B memiliki perbedaan yang cukup besar dalam kelompok inertinite, yaitu: Seam A memiliki nilai inertinte 3,0% – 4,4% dan Seam B memiliki nilai inertinte 12% – 18.8%. Nilai vitrinite tinggi mencirikan pembentukan batubara pada kelompok ini berasal dari tumbuhan yang telah terbakar dan sebagian besar berasal dari proses oksidasi maseral lainya (dexarboxylaction). Proses oksidasi maseral terjadi disebabkan oleh bakteri dan jamur, sehingga akan meningkatkan abu dan sulfur pada suatu batubara.
KAJIAN TEKNIS LOSSES MATERIAL ORE NIKEL UNTUK MENGHITUNG OPTIMALISASI SHIPMENT RATIO PADA PENAMBANGAN PT. BUKIT MAKMUR ISTINDO NIKELTAMA Rezki Ramadhan; Edy Nursanto; Nur Ali Amri
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3182

Abstract

Kegiatan produksi penambangan blok keuno difokuskan pada penambangan material Low Grade Saprolith Ore, Material Low Grade Saprolith Ore adalah kelompok bijih nikel kadar rendah yang diperuntukkan untuk ekspor dengan batas kadar tertentu. Adanya tahapan pemindahan material LSGO dari front penambangan menuju stockyard transito dan stockyard final ore dimaksudkan untuk mengetahui berapa besar persentase losses material LSGO tersebut dan mengetahui faktor apa saja yang menjadi penyebab terjadinya losses material dengan melakukan perhitungan losses menggunakan metode survey dan truck count hauling serta pengamatan kegiatan pemindahan material secara langsung. Didapatkan losses material yang dihasilkan sebesar 2,16% untuk kegitan hauling, penyebab terjadinya losses antara lain adanya material yang melekat pada alat berat dan faktor dumpingan yang membuat sebagian material menjadi landasan bedding basement stockyard transito dan basement lantai stockyard final ore.
GEOLOGI, ALTERASI DAN MINERALISASI EMAS EPITERMAL SULFIDASI RENDAH DI DAERAH TAMBANG SAWAH, LEBONG, PROVINSI BENGKULU Muhammad Muhsin Al Hakim; Arifudin Idrus; Wiwit Suryanto
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3185

Abstract

Abstract –– Tambang Sawah Area, Lebong Regency, Bengkulu Province, is geologically located in the Barisan mountains and Sumatra fault zone. The prospect of Tambang Sawah area lies in the physiography of the central Sumatran mountains ranges composed by the igneous rocks of the Sunda – Banda magmatic arc. This study is aimed to understand the deposit geology and ore characteristics of the gold deposit at the study area. Quartz vein mineralization of Tambang Sawah occurred in granite rock intruded into andesitic breccia rocks, with the geological structure of mineralization control in the form of joint, breccia, dike, and fault, namely the Ketahun fault that forms extentional fracture zones which were filled by hydrothermal fluid in form of quartz veins. Hydrothermal alterations that appear at the study site are typical types of alterations found in epithermal gold deposits, namely, argillic, silicified and propylitic. Sulfide minerals markers of low sulfidation epithermal type gold deposits found, namely, pyrite, calcopyrite, covelite, sphalerite and galena with colloform vein texture, cockade-crustiform, moss, and brecciated texture. Gold is interpreted to be derived from the deposition of sulfide minerals and the deposition of quartz veins, the level of gold in rocks and veins varies greatly with an average 4,8 ppm. Based on the results of ore geochemical analysis of positively correlated gold with elements Ag, Cu, Pb and Zn. Keywords: Mineralization, low sulfidation epithermal gold, Tambang Sawah, Lebong, Bengkulu.
USE OF THERMAL IMAGING CAMERA TO CHECK FOR REFRIGERANT LEAKS ON A REFRIGERATION SYSTEM Windy Hermawan Mitrakusuma; Muhammad Raja Bara Ramadhan Siswanto; Wirenda Sekar Ayu
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3195

Abstract

Tulisan ini menganalisis tentang penggunaan kamera thermal imaging untuk pengecekan kebocoran refrigerant pada system refrigerasi. Dalam suatu prosedur perawatan sistem RHVAC, salah satu prosesnya merupakan pengecekan kebocoran pada pipa sistem RHVAC tersebut. Ada berbagai macam metode dalam melakukan pemeriksaan kebocoran pada sistem RHVAC. Pada tugas akhir ini akan dilakukan prosedur pemeriksaan kebocoran menggunakan metode yang jarang dipakai, yaitu menggunakan kamera thermal imaging. Alat ini dapat menangkap gambar suatu objek menggunakan radiasi inframerah sehingga distribusi temperatur objek tersebut dapat terlihat pada foto yang dihasilkan kamera thermal imaging ini. Pada suatu kebocoran fluida seperti refrigeran akan terjadi proses throttling yang menyebabkan adanya perbedaan temperatur fluida di dalam pipa dengan temperatur fluida yang keluar melewati lubang kebocoran. Dengan kamera thermal imaging hasil kebocoran dapat di deteksi, namun ada beberapa batasan dari kamera tersebut yang perlu diperhatikan dalam prosedur pengecekan kebocoran agar hasil yang didapatkan optimal.
A RING-FAULT DELINEATION OF AN ANCIENT VOLCANIC CALDERA BASED ON 3-D GRAVITY INVERSE MODELING IN MAJENANG REGION, INDONESIA Accep Handyarso
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3197

Abstract

Calderas are important geological features in all volcanic environments due to give directives clues of geological resources such as geothermal system, mineralization, or even in oil and gas potential reserved. The ability of recognizing these specific features play an important role in the exploration activities. A good understanding of the geological settings will bring to the right direction and make the exploration activities becomes optimized and cost effective. Gravity method is commonly used for preliminary study almost of any cases due to lightweight, low-cost, and the ability to figure out a wide region quickly. Gravity method has an excellent lateral resolution but it has limitation with the vertical resolution. Applying depth-weighting mechanism makes, the inverse-modeling result becomes interpretable. According to the research, there is a northwest-southeast dextral strike-slip fault in the area, which belongs to the Pamanukan-Cilacap Fault Zone (PCFZ). A Circular anomaly pattern also delineated and interpreted as the ring-fault of an ancient volcanic caldera in the study area. Several high gravity anomaly located within the caldera-rims are interpreted as the lava domes or intrusion rocks. The eruption center point estimated at around the Majenang city. The PCFZ behaves as the weak zones in the area where the magmatism rise through and create the ancient volcano, which now remain as the Majenang Caldera. Keywords: Gravity, Caldera, Ring-Fault, Geological-Resources, Indonesia.
ANALYSIS OF TRAVEL CAREER PATTERNS IN TOURISM DESIGN AREA AT SUNSET BEACH KARANGPAPAK Shahnaz Keke Rahmani; Ida Ayu Sawitri Dian Mawarni; Rachmat Taufick Hardi
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3200

Abstract

Karangpapak Sunset Beach is one of the beaches in Sukabumi Regency which has tourism potential to be visited by tourists because it has advantages and interesting characteristics, namely to learn to surf. In addition, travel career patterns are also influential in developing a tourist area. However, with the many tourist motives of tourists and the limited attractiveness they have and areas that are not equipped with tourism elements, it is necessary to analyze travel career patterns to determine what tourist areas are needed by tourists and by referring to the elements of tourism planning. The method used is a qualitative method by conducting participatory observations, interviews, documentation and literature review. The results of the analysis explain that there is a tendency that tourists on Sunset Beach Karangpapak have reached the middle layer motives and outer layer motives where it can be said that tourists will revisit Sunset Beach Karangpapak. This analysis was carried out as a result of a comprehensive spatial study.
PENGGUNAAN PLUM MODEL DALAM ANALISIS PENGARUH FAKTOR PENGETAHUAN TERHADAP ATTITUDE DAN PRAKTEK PENGOLAHAN SAMPAH BERBASIS 3R Ridayati; A. Yunastiawan
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3572

Abstract

Abstrak — Pengelolaan sampah rumah tangga merupakan isu penting dalam upaya menciptakan lingkungan permukiman yang berkelanjutan. Pengelolaan sampah rumah tangga memerlukan pola penanganan yang tepat. Upaya penerapan prinsip Reduce, Reuse, Recycle (3R) dalam pengelolaan sampah rumah tangga juga merupakan salah satu pendekatan yang populer di Indonesia. Kabupaten Sleman sebagai salah satu bagian dari Kawasan Perkotaan Yogyakarta (KPY) merupakan salah satu daerah yang berusaha menerapkan prinsip 3R dalam pengelolaan sampah rumah tangga. Penelitian ini menggunakan pendekatan studi kasus untuk mengukur hubungan antara pengetahuan tentang pengelolaan sampah rumah tangga berdasarkan prinsip 3R dengan sikap dan praktik yang dilakukan oleh masyarakat dalam pengelolaan sampah berbasis 3R di Kabupaten Sleman. Jumlah responden dalam penelitian ini adalah 300 responden yang merupakan kepala keluarga yang tinggal di Desa Sinduadi dan Sendangadi, Mlati, Kabupaten Sleman. Dataset dari hasil pengumpulan kuisioner diolah dengan menggunakan pendekatan Polytomous universal Model (PLUM) Model. Hasil penelitian menunjukkan bahwa ada hubungan antara aspek pengetahuan dengan sikap dan praktik masyarakat dalam pengelolaan sampah rumah tangga berbasis 3D. Kata kunci: sampah rumah tangga, 3R, PLUM
PROTOTYPE OF MASK RECOGNITION AND BODY TEMPERATURE IN REAL TIME WITH AMG8833 THERMAL CAM SENSOR FOR COVID-19 EARLY WARNING BASED ON MINICOMPUTER Muchamad Malik; Aan Burhanuddin; Yuris Setyoadi
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3585

Abstract

On April 19, 2020, the Republican Covid Task Force declared that the Covid-19 pandemic was a national disaster in Indonesia. At that time it was confirmed that there were 6575 cases and an increase of 5.23% compared to the previous day, then there were 5307 people in treatment which increased by 5.55% compared to the previous day, it was reported that 582 people died, which increased by 8.79 % compared to the previous day, and 686 recovered patients. WHO reports that the case fatality rate (CFR) or the death rate of Covid-19 cases in Indonesia reached 8.3%, which is twice the world's CFR. In this study, the main focus is to detect masks and body temperature used by visitors with various variations of masks on the market today, and next is to control the servo motor according to the detection conditions whether using a mask in real-time. Based on research on the system that has been tested, it shows that the components used to generate heat are very effectively used and can work as expected, and the MobilenetV2 method applied to the Raspberry Pi as the brain of the system can work as expected and has an accuracy rate of 99%. The AMG8833 sensor can read effectively at a maximum distance of 30 cm, the temperature reading deviation level is 0.1⁰C.
STUDY OF KINETICS AND ADSORPTION ISOTHERM MODELLING OF POME FINAL DISCHARGE USING MAGNETIC BIOCHAR AS ADSORBENT Kesni savitri; David Andrio; Zuchra Helwani
KURVATEK Vol 7 No 2 (2022): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v7i2.3210

Abstract

Penelitian tentang pemodelan kinetika dan isoterm adsorpsi pelepasan akhir POME menggunakan biochar magnetik dari pelepah sawit untuk menghilangkan COD, TSS dan warna telah dilakukan. Sintesis, karakterisasi dan uji adsorpsi magnetik biochar telah berhasil dilakukan. Magnetic biochar dibuat dengan cara impregnasi pelepah sawit menggunakan FeCl3.6H2O selama 3 jam dan pirolisis menggunakan reaktor fixed bed horizontal dengan laju alir N2 0,2 l/menit pada suhu 550oC selama 20 menit. Data adsorpsi COD, TSS dan Warna dideskripsikan dengan baik oleh isoterm Langmuir dengan nilai R2 sebesar 0,9869; 0,9795; 0,9972. Model kinetika digambarkan dengan model orde dua semu dengan nilai R2 0,9789; 0,9942; 0,9550. Berdasarkan hasil model isoterm dan kinetika COD, TSS dan warna, adsorpsi terjadi karena adanya ikatan kimia dengan adanya monolayer adsorbat pada permukaan magnetic biochar.

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