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All Journal Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri NUSANTARA: Jurnal Pengabdian Kepada Masyarakat TEKSTUR : Jurnal Teknologi Infrastruktur Jurnal Meteorologi dan Geofisika
Afni Nelvi
Sekolah Tinggi Teknologi Industri Padang
Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Physics Public Health Social Sciences Transportation

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PERBANDINGAN KONSUMSI BAHAN BAKAR MITSUBISHI FUSO 220 PADA SETIAP SEGMEN JALAN DAN BERDASARKAN RPM Sendriadi Adha; Afni Nelvi; Hisni Rahmi
Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri Vol 23, No 1 (2023): JURNAL SAINS DAN TEKNOLOGI
Publisher : Sekolah Tinggi Teknologi Industri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36275/stsp.v23i1.604

Abstract

PT Haswi Kencana Indah menargetkan konsumsi bahan bakar yang digunakan adalah 19 liter/jam pada pengangkutan batubara dari front penambangan menuju stockpile. Namun pada kenyataannya di lapangan, konsumsi bahan bakar 21 liter/jam yang melebihi dari standar perusahaan. Pengamatan di lapangan terlihat bahwa kondisi jalan angkut terdapat amblasan serta berlumpur. Kondisi jalan juga di pengaruhi oleh kemiringan yaitu 20º untuk dilalui oleh truck pengangkut batubara. Kondisi jalan tersebut tentunya akan mempengaruhi terhadap konsumsi bahan bakar. Konsumsi bahan bakar menjadi hal yang sangat perlu dikaji karena berkaitan dengan biaya operasional yang dikeluarkan oleh perusahaan dalam operasi pengangkutan. Banyak faktor yang mempengaruhi besar atau kecilnya konsumsi bahan bakar diantaranya kemiringan jalan (grade), RPM alat angkut, kecepatan alat angkut, rimpull alat angkut, jarak tempuh alat angkut, dan waktu tempuh alat angkut. Tujuan penelitian ini adalah membandingkan konsumsi bahan bakar Mitsubishi Fuso 220 pada setiap segmen jalan dan berdasarkan RPM. Data yang dibutuhkan adalah panjang jalan, RPM, waktu edar alat angkut, kondisi jalan di lapangan. Hasil pengolahan data menunjukkan bahwa penggunaan konsumsi bahan bakar truck Mitsubishi fuso 220 pada setiap operasi pengangkutan batubara di PT. Haswi Kencana Indah dengan jarak 798 meter adalah 21,1 liter/jam (saat bermuatan 17,573 liter/jam, 3,527 liter/jam saat kosong) sedangkan pemakaian bahan bakar menggunakan perhitungan RPM adalah 18,01 liter/jam (11,09 liter/jam bermuatan, kosong 4,7 liter/jam dan pada saat idle 2,22 liter/jam). Berdasarkan hasil penelitian, penulis merekomendasikan terkait kondisi permukaan jalan, grade jalan yang ada di lapangan seperti meminimalisir amblasan (≤ 5 ????????) dengan menimbunnya dengan batuan-batuan yang relatif keras dan memperlebar jalan angkut ideal tikungan untuk dilalui truck Mitsubishi fuso 220 sebesar 8,04 meter.
PENGARUH FLY ASH DAN KAPUR TOHOR TERHADAP KUALITAS AIR ASAM TAMBANG (pH dan TSS) DI PT. BARA PRIMA PRATAMA Hisni Rahmi; Afni Nelvi; Boyman Situmorang
Jurnal Teknologi Infrastruktur Vol 2 No 1 (2023): Jurnal Teknologi Infrastruktur Volume 2, Nomor 1, Juni 2023
Publisher : Fakultas Teknik Universitas Panca Bhakti

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Abstract

Acid mine water management can be carried out by active treatment and passive treatment. Acid mine water management in PT. Bara Prima Pratama is carried out with an active method by liming. The purpose of this study was to analyze the effect of the composition of a mixture of fly ash and quicklime as much as 0.30 grams on the pH and TSS parameters of acid mine water. The neutralization process is carried out on a laboratory scale using experimental methods with the addition of fly ash coagulant and quicklime in 9 test variations. Significant pH changes with an initial pH of 3.3 occurred at dose variations of 10:90 (1st try, pH 8.1), 20:80 (2nd try, pH 7.9) and 30:70 (3rd try, pH 7.6). This shows that to neutralize the pH requires a greater dose of quicklime in the composition of the mixture (quicklime can increase the pH value quickly). Furthermore, TSS testing was also carried out 9 times with an initial TSS value of 123 mg/L. After neutralization was obtained, the TSS value continued to increase in proportion to the composition carried out (test 9, TSS value 219 mg/L) but still met environmental quality standards with a threshold value of 400 mg/L. This shows that the use of fly ash and quicklime does not have a major effect on TSS changes.
Sosialisasi Potensi Dan Peluang Kerja Di Kabupaten Lima Puluh Kota Afni Nelvi; Hisni Rahmi; Riam Marlina Amsya; Ahmad Fadhly; Nofriadiman Nofriadiman; Elmawati Elmawati; Riko Ervil; Nelsy Mariza Syahyuda
NUSANTARA Jurnal Pengabdian Kepada Masyarakat Vol. 3 No. 4 (2023): November : Jurnal Pengabdian kepada Masyarakat
Publisher : Pusat Riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/nusantara.v3i4.1936

Abstract

Based on data from the West Sumatra energy and mineral resources service, it is stated that Limapuluh Kota Regency has the potential for rocks (andesite, granite, limestone, marble) and metallic minerals (gold and lead). This huge natural potential requires good management so that it can develop and requires potential human resources as well. This is the background for socializing opportunities and potential job opportunities in Limapuluh Kota Regency. The socialization explains what potential mining resources exist in Limapuluh Kota Regency along with the job opportunities that exist in managing these resources. The target of this socialization is to open the minds of high school students in terms of the natural potential that their region has and to open up the students' insight in choosing the science they will study in college, so that as sons/daughters of the region they can contribute to the management and development of their region.
DURASI PENYINARAN MATAHARI DAN DIURNAL TEMPERATURE RANGE SERTA KAITANNYA DENGAN PERUBAHAN IKLIM DI PONTIANAK, INDONESIA Afni Nelvi; Refky Adi Nata
Jurnal Meteorologi dan Geofisika Vol. 24 No. 2 (2023)
Publisher : Pusat Penelitian dan Pengembangan BMKG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31172/jmg.v24i2.817

Abstract

Sunshine Duration (SD) has an important role in climate change or the weather on the earth. Climate change can be indicated by changing SD values ​​(dimming/brightening) in recent decades. SD and diurnal temperature range (DTR) analysis needs to be done to find out how significant the impact of climate change. The daily dataset from 1981-2019 of SD, DTR, Tmean, Tmax, Tmin, and rainfall in Pontianak, West Kalimantan, is analyzed with Continuous Wavelet Transform (CWT) and wavelet coherence (WTC). Results of CWT using the Morlet wavelet SD have a dominant period of 8-16 months. DTR has a dominant period of 8-16 months and 32-64 months. The increase in SD indicates that Pontianak is in a brightening period caused by changes in the characteristics of clouds and aerosols. It causes an increase in the amount of solar energy reaching the earth's surface. Climate change has been detected by the decrease in DTR. A negative correlation was found between DTR and SD (r = -0.80). DTR is a very good indicator of climate change because of its sensitivity to radiative energy balance. Changes in SD have a significant impact on Tmean, Tmax, and Tmin. The increase of Tmin, faster than Tmax, causes a decrease in DTR. Tmin is predicted to be higher. Tmean and Tmax have dominant periods of 8-16 months, while Tmin has dominant periods of 12-20 months and 32-64 months. The increase in temperature detected during this period is associated with peatland forest fires in Kalimantan. This condition occurs due to the effect of the brightening period and increasing concentrations of greenhouse gases in the atmosphere. Rainfall is detected in the period of 4-8 months and 8-16 months. The drought associated with the El Nino event resulted in a large amount of rainfall deviation from normal.
Co-Authors Ahmad Fadhly Boyman Situmorang Elmawati Elmawati Hisni Rahmi Hisni Rahmi Nelsy Mariza Syahyuda Nofriadiman, Nofriadiman Refky Adi Nata Riam Marlina Amsya Riko Ervil Sendriadi Adha