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All Journal JISTECH: Journal of Information Science and Technology
Panggabean, Bodian Davin
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Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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PENGUJIAN SIFAT FISIS DAN KIMIA PENGUJIAN SIFAT FISIS DAN KIMIA AIR TANAH DI DAERAH SENTANI DAN SEKITARNYA: TESTING OF THE PHYSICAL AND CHEMICAL PROPERTIES OF GROUNDWATER IN SENTANI AND SURROUNDING AREA PANGGABEAN, BODIAN DAVIN; Tambing, Frans Simbol
JISTECH: Journal of Information Science and Technology Vol 12 No 2 (2023): Volume 12 Nomor 2 Tahun 2023
Publisher : Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jistech.v12i2.249

Abstract

Communities in Jayapura use groundwater for their daily needs both from springs, dug wells and drilled wells. The research was conducted in the Sentani and surrounding areas. The purpose of this study was to determine the physical and chemical properties of groundwater based on laboratory tests. The physical and chemical properties of groundwater are one of the main properties of water and are very useful for determining the quality of groundwater. This study took three sampling locations with stratified random sampling method. The samples taken were springs, dug wells and drilled wells. The parameters of the physical properties of groundwater tested included pH, temperature ( T0C ), TDS, hardness ( CaCO3 ), while the parameters of the chemical properties of ground water tested included magnesium (Mg), calcium (Ca), potassium (K), Sodium (Na), Sulfate (SO4), Chloride (Cl) and Bicarbonate (HCO3). In general, all samples analyzed from the study area showed that the levels of chemical elements in groundwater had not exceeded the drinking water standard limits, but there were locations that had high levels of magnesium, namely location 1 (Sosiri) of 149 mg/L. The results of the physical properties test showed that the test content value had not exceeded the drinking water standard limit, in the sense that the groundwater in the study area was suitable for use. Key words :Chemistry-physics, groundwater.
EFESIENSI KERJA EFESIENSI KERJA ALAT MUAT KOMATSU PC 400 LC GUNA MEMENUHI KEBUTUHAN PRODUKSI STONE CRUSHER : EFESIENSI KERJA ALAT MUAT KOMATSU PC 400 LC GUNA MEMENUHI KEBUTUHAN PRODUKSI STONE CRUSHER Panggabean, Bodian Davin; Tambing, Frans Simbol; Ginting, Fandy Arapenta
JISTECH: Journal of Information Science and Technology Vol 14 No 2 (2025): Volume 14 Nomor 2 Tahun 2025
Publisher : Universitas Papua

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30862/jistech.v14i2.894

Abstract

PT. Semen Tonasa is a business entity engaged in the cement industry located in Biring Ere Village, Bungoro District, Pangkep Regency, South Sulawesi Province. PT Semen Tonasa currently has four operating factory units, namely Tonasa II, III, IV, and V units. In order to meet the planned production capacity, sufficient raw materials are needed, such as limestone in factory units II, III, IV, and V with a production capacity per unit of 1,200 tons/hour. So that the four stone crushers that must be met are 57,600 tons/day. Material retrieval is focused on the B8 mining location with a PC 400 LC loading tool. Based on the estimated calculation of the work production capacity of the equipment operated at the B8 mining location using two Komatsu PC 400 LC loading equipment, it is estimated at 274,268.52 tons/day with a work efficiency of 53%, it has been able to meet the production target to be distributed to all stone crusher processing equipment that is producing in the field, taking into account the delivery time and the number of transport equipment needed in the field. The design of production increase efforts to meet market demand targets can be done by reducing obstacles that occur in the field and increasing the number of transport equipment. So that the work efficiency of the loading equipment can be further optimized to meet the production needs of the crusher.
Co-Authors Ginting, Fandy Arapenta tambing, frans simbol