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All Journal Jurnal Surya Teknika NUSANTARA: Jurnal Pengabdian Kepada Masyarakat TEKSTUR : Jurnal Teknologi Infrastruktur Jurnal Meteorologi dan Geofisika
Nelvi, Afni
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Physics Public Health Social Sciences Transportation

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Sosialisasi Potensi Dan Peluang Kerja Di Kabupaten Lima Puluh Kota Nelvi, Afni; Hisni Rahmi; Marlina Amsya, Riam; Fadhly, Ahmad; Nofriadiman Nofriadiman; Elmawati Elmawati; Ervil, Riko; Mariza Syahyuda, Nelsy
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.
Penetralan Air Asam Tambang Menggunakan Campuran Kapur Tohor Dan Tawas Untuk Memenuhi Baku Mutu Lingkungan Pada Parameter pH Dan TSS Di KUD Sinamar Sakato Yolanda, Melfa; Hadiyansyah , Dian; Rahmi , Hisni; Nelvi, Afni; Marlina Amsya, Riam; Juniah , Restu; Fadhly, Ahmad
Jurnal Teknologi Infrastruktur Vol 5 No 02 (2023): Jurnal Teknologi Infrastruktur Vol 2 No 2 2023
Publisher : Fakultas Teknik Universitas Panca Bhakti

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Abstract

The results of observations of acid mine water in KUD Sinamar Sakato is known by the presence of water in the settling pond has a pH of 5.2 besides that there is also the presence of brownish turbid wastewater. The purpose of the study was to analyze the quality of acid mine water after the addition of a mixed dose of alum and quicklime, analyze the amount of dose requirement of the mixture of alum and quicklime and the costs required to neutralize the acid mine water. The primary data needed are the pH of the water, the value of TDS. The quality of acid mine water after the addition of a dose of a mixture of alum and quicklime to the KUD Sinamar Sakato has met environmental quality standards for pH and TSS with a mixed dose of 0.25 g/l of quicklime plus 0.5 g/l of alum. The amount of need to neutralize acid mine water for field-scale doses required of alum mixture as much as 79.92 kg d an increase of 399.6 kg of quicklime per day. The cost required in neutralizing acid mine water with a mixed dose of alum and quicklime for 1 day for a total of Rp 4,075,920.
Pengukuran Tingkat Kepuasan Produk Hand Craft di Home Industri Menggunakan Metode Servsqual dan IPA Arista, Anggia; Nelvi, Afni
SURYA TEKNIKA Vol 11 No 2 (2024): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v11i2.8075

Abstract

Recently, businesses in the handicraft sector have been very popular with the people of Batam City. The hand craft business produces handicraft items such as plaques, name plates, acrylic house numbers, acrylic motorbike plates, acrylic boxes and others. Rusya's hand craft business already has regular customers, consumers who come from Batam City and outside Batam City. From the research results for the tangible dimension of the quality satisfaction category, the value is positive, for the reliability dimension there is 1 attribute that has a negative value, namely statement number 5 with a value of -0.16. For the responsiveness dimension, there is 1 attribute that is not satisfied with a value of -0.1, namely statement number 9, namely speed and toughness in handling consumer complaints. For the empathy dimension, namely number 15, namely the employee attribute section that cares about consumer desires when ordering products, it has a value of -0.1. Solutions that need to be improved by providing services in accordance with what has been agreed upon, providing targets for employees, providing professional workers in accordance with their fields
PENGARUH FLY ASH DAN KAPUR TOHOR TERHADAP KUALITAS AIR ASAM TAMBANG (pH dan TSS) DI PT. BARA PRIMA PRATAMA Rahmi, Hisni; Nelvi, Afni; Situmorang, Boyman
Jurnal Teknologi Infrastruktur Vol 3 No 1 (2023): Jurnal Teknologi Infrastruktur Volume 3, 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.
DURASI PENYINARAN MATAHARI DAN DIURNAL TEMPERATURE RANGE SERTA KAITANNYA DENGAN PERUBAHAN IKLIM DI PONTIANAK, INDONESIA Nelvi, Afni; Nata, Refky Adi
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 Arista, Anggia Dian Hadiyansyah Elmawati Elmawati Fadhly, Ahmad Hisni Rahmi Juniah , Restu Mariza Syahyuda, Nelsy Nata, Refky Adi Nofriadiman, Nofriadiman Rahmi , Hisni Riam Marlina A Situmorang, Boyman Yolanda, Melfa