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INDONESIA
Jurnal technoscientia
Published by Institut Sains dan Teknologi AKPRIND
ISSN : 19798415     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
Arjuna Subject : -
Articles 14 Documents
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Search results for , issue " Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018" : 14 Documents clear
PENGARUH VARIASI KONSENTRASI LIMBAH TERHADAP PENURUNAN KANDUNGAN TEMBAGA PADA PENGOLAHAN LIMBAH CAIR PROSES ETCHING DENGAN METODE ELEKTROLISIS Hindarti, Fifin
Jurnal Teknologi Technoscientia Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018
Publisher : IST AKPRIND YOGYAKARTA

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Abstract

The waste water of copper board etching process in Printed Circuit Board (PCB) production is kind of heavy metal waste water, that is copper, which has not been treated yet. In order to prevent the environment contamination process the waste water should be treated before thrown to environment. The kind of waste water treatment that will be applied to the waste water with heavy metal content, specially copper metal (Cu) is electrolysis method.The experiment was done in laboratory scale. The batch electrolysis reactor was used in this experiment, with the copper as katoda and stainless steel as anoda. Electrolysis process was conducted with waste concentration variation that was equal to 124,16; 110,96 ; and 35,84 ppm.The result of the experiment shows that, the electrolysis methode could reduce copper concentration in the waste water of etching process. The biggest efficiency degradation for the variation of waste concentration was happened at waste concentration 35,84 ppm, that was equal to 100%, with end result equal to 0 ppm. Waste concentration equal to 124,16 of ppm its result 96,24 ppm, and for concentration 110,96 ppm was got by result 0,35 ppm.
PENURUNAN BOD PADA BIOGAS KOTORAN SAPI CAMPURAN LIMBAH CAIR RUMAH POTONG HEWAN (RPH) DENGAN VARIASI KECEPATAN DAN LAMA PENGADUKAN Indrawati, Rosiana
Jurnal Teknologi Technoscientia Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018
Publisher : IST AKPRIND YOGYAKARTA

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The scarcity of energy sources, especially fuel oil (BBM) has become a world problem. The abundant cattle dung in the community has not been optimally utilized. In addition, the slaughterhouse (RPH) wastewater has not been optimally utilized. The aim of this research is to know the effect of speed and duration of stirring to biogas volume and final BOD concentration on cow dung biogas mixture the slaughterhouse (RPH) wastewater.The experiment used biodigester reactor as much as 5 pieces, 1 as the controller without stirring and 4 others as the test digester with stirring. RPH0 as a control digester without stirring. Variation of stirring speed 5 and 10 rpm and stirring time 10 and 15 minutes. The volume of biogas is measured for 20 days. BOD levels are measured on the last day of the fermentation process.The experiment showed that the highest biogas volume was found on PK10L10 test digester that was mixture of cow dung and the slaughterhouse (RPH) wastewater with variation of 10 rpm and duration of stirring 15 minutes ie 1,331 m3, and the lowest biogas volume was 0,243 m3 in RPH0 digester. The highest decrease in BOD content was 37% in RK10L15 digester and the lowest decrease RK5L15 digester was 12%. The stirring process has a significant effect on biogas production and decrease of BOD concentration in the digester.
PENGOLAHAN LIMBAH RUMAH TANGGA DENGAN MENGGUNAKAN BUFFLED UP-FLOW REACTOR Artiningsih, Wuryani; Triastianti, Rita Dewi
Jurnal Teknologi Technoscientia Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018
Publisher : IST AKPRIND YOGYAKARTA

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Environmental problems occur because the act of a human hand which then cause disturbance to the environment. Household or domestic activities such as can be and has been shown to cause a decline in water quality. With increasing liquid waste disposal, pollution is increasing so that pollute the environment. Therefore, the authors wish to conduct research of domestic waste water with the aim to reduce levels of phosphate, nitrite and detergent. In domestic wastewater/sewage household, the authors chose to use anaerobic processing using buffled up-flow reactor were made using glass with a length of 100cm, width 25 cm and height 30 cm. The results obtained for the effluent phosphate levels for 0.3502 mg/L on the second replay (the second day), nitrite by 0.1206 mg/L on the second replay (the second day) and detergent was 0.2799 mg/L in the first repeat (on the first day) in terms of the processing of the buffled up-flow reactor capable of lowering the levels of phosphate, nitrite and detergent in water and wastewater. Removal efficiency obtained from the results of wastewater treatment with bufffled up-flow reactor for phosphate content of 47.3%,-13.30% and detergents nitrite 57.8%.
POLA SEBARAN BATUBARA FORMASI NANGGULAN KABUPATEN KULONPROGO DAERAH ISTIMEWA YOGYAKARTA Heriyadi, Nur Nur Widi Astanto Agus Tri; Tania, Dina
Jurnal Teknologi Technoscientia Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018
Publisher : IST AKPRIND YOGYAKARTA

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Coal is one of the energy resources still become the primary needs of strategic energy for sustaining national energy in Indonesia. This study discusses coal existence in Nanggulan Formation at Yogyakarta area. Coal distribution pattern in Nanggulan Formation can provide the geometry conception base on the geological research in Watupuru area encountered three coal outcrop (OC_1, OC_2, and OC_3) stratigraphically is at the bottom layer.Coal distribution in the research area influenced by the pattern of anticline structure which has the position of the wing of East and West with the relative anticline axis of north-south direction. Reconstruction results show there is two-seam of coal, for the first seam layer have 0,55 meters thickness and for the second seam layer have 20,57 meters thickness. Seam 1 of reconstructed surface data has spread on the East side of the anticline. Seam 2 stratigraphically under seam 1 of the reconstruction results indicate that the spread is close to the anticline axis and spreads on the east side of the anticline with a 26o slope and the western wing side of the anticline with a slope 10o.
MATURITY LEVEL DOMAIN PLANNING AND ORGANIZING DENGAN COBIT 4.1 PADA PT DINAMIKA PUTRA Kurniawan, Yogiek Indra
Jurnal Teknologi Technoscientia Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018
Publisher : IST AKPRIND YOGYAKARTA

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Information Technology (IT) Governance plays a role in corporate governance in whole aspect. Organized IT management will have a significant impact on business processes and the viability of a company. In managing IT governance, there are many frameworks can be used, one of which is CobIT version 4.1 which is a comprehensive framework and guideline for IT management. In CobIT version 4.1 contains some assessments that can be done, one of which is the assessment of maturity level that serves to see the condition of a company in the field of IT at the present time and hope in the future. This research was conducted to measure the maturity level of a company, namely PT Dinamika Putra, an IT consultant company in Surakarta city in Planning and Organizing (PO) domain with CobIT version 4.1. From the results of the assessment, the maturity level of the Planning and Organizing (PO) domain in PT Dinamika Putra currently reaches 3.21, ie at the defined process level, whereas the future expected by the company is reaching 4.16, ie at managed and measurable level. This shows the gap between present and future conditions, so strategic steps are needed to cut the gap between current conditions and expected conditions in the future.
ANALISIS STABILITAS DAN PEMILIHAN PERKUATAN LERENG PADA RUAS JALAN PEMUDA KM. 3 KABUPATEN KOLAKA PROVINSI SULAWESI TENGGARA Yatjong, Isramyano; Fachryano, Fachryano
Jurnal Teknologi Technoscientia Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018
Publisher : IST AKPRIND YOGYAKARTA

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Slope conditions have been excavated due to widening of the road from the toe to the top of the slope. High rainfall instensity causes erosion along the slope surface and circular landslide on the slope. Geotechnical investigation was conducted to obtain data of physical and mechanical properties of soil in landslide area. Slope geometry excavated based on field conditions.Slope stability is based on a safety factor of 1,3 using the Bishop limit equilibrium method via Sldie v.06 and finite element method through Phase2 v.08 software and provides slope reinforcement method.The result of slope stability analysis using Slide v.06 is the value of critical safety factor equal to 1,009 with the landslide area of the first bench and the second bench. While the results of the analysis using the Phase2 v.08 is the value of critical safety factor equal to 0,980 with the landslide area of the first bench and the second bench. Both critical safety factors indicate unstable before to slope reinforcement that is still below the permit SF of 1,30 so that reinforcement is required stone retaining wall, pipe installation on slope face, make a water trench, planting and maintain vegetation at the top of the slope.
Hal 00 Cover-Daftar Isi Sutanta, Edhy
Jurnal Teknologi Technoscientia Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018
Publisher : IST AKPRIND YOGYAKARTA

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FABRICATION, MECHANICAL PROPERTIES, AND INTERFACE STRUCTURE OF RAMIE FIBER COMPOSITE -, Sudarsono
Jurnal Teknologi Technoscientia Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018
Publisher : IST AKPRIND YOGYAKARTA

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In present work, ramie fiber based composites are fabricated and tested on its mechanical properties and interface structure. The work aims to investigate effect of volume fraction of ramie fiber (VoF) on mechanical properties (yield and tensile strength, bending stress and strain, and modulus elasticity) of the composites. Besides, bonding and mixing between ramie fiber and resin are also observed under interface structure test. The VoF observed are 25, 35, 45, and 55%. The results indicate that maximum yields strength of 8.03 kgf/mm2 and tensile strength of 12.29 kgf/mm2 are obtained in the composite with VoF of 45%. Meanwhile, bending stress of 121.78 MPa and bending stress of 3.25% are observed in the composite with VoF of 55%. Although good bending between ramie and resin are occurred, but non-uniform mixing between the two is observed due to fabrication method used.
ANALISIS PETROGRAFI BATUGAMPING FORMASI SENTOLO SEBAGAI BATUAN RESERVOIR HIDROKARBON DAERAH KARANGSARI, KECAMATAN PENGASIH, KABUPATEN KULONPROGO Wiloso, Danis Agoes; -, Khoirunnada
Jurnal Teknologi Technoscientia Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018
Publisher : IST AKPRIND YOGYAKARTA

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The research area is located in Karangsari Area, Pengasih District, Kulon Progo Regency, Daerah Istimewa Yogyakarta. The purpose of this research is to know porosity and naming of limestone based on petrographic analysis. The method used to determine the porosity and naming of the limestone by analyzing the thin section of limestone and for naming it using Folk Classification (1959) and Dunham (1962). The results of data collection and processing of limestone slabs are observed at Location Observation 1 found Mudstone and Biosparit, at Location Observations 2-5 obtained Packstone and Biomicrite. Based on the petrographic appearance of the rock, the porosity belongs to the intergranular porosity of the pores located between the grains covered by the cement at Location Observation 1 with a 20% percentage of good porosity category, Location Observation 2 with a 20% percentage of good porosity category, Location Observation 3 with percentage 20% sufficient porosity category, Location Observation 4 with percentage 15% category porosity enough, Location Observation 5 with percentage 15% category porosity enough.
STUDI KARAKTERISTIK PEMBAKARAN MINYAK PIROLISIS PLASTIK MENGGUNAKAN STEAM-ATOMIZING BURNER Cahyono, Muhammad Sigit; Styana, Ucik Ika Fenti
Jurnal Teknologi Technoscientia Vol 10, No 2 (2018): Vol 10 No 2 Februari 2018
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One of the new and renewable energy resources is Plastic Pyrolysis Oil, that produced from pyrolysis process of plastic wastes. This oil could be utilized as energy source using steam-atomizing burner, which it burning characteristics dependent to air pressure that used in the burner. The objective of the research was to investigate the influence of air pressure on the burning characteristic of plastic pyrolysis oil using steam-atomizing burner. The raw material that used are dry LDPE wastes. First, it was heated in pyrolysis reactor using biomass combustion as energy source, produced pyrolsyis oil, noncondensable gases, and carbon black. The oil that produced is used as fuel for combustion in steam-atomizing burner, to know it burning characteristic, with variable air pressure on 1, 2, 3, 4, and 5 bar. The observation was made on fire temperature, the long of flame, and it efficiency, that showed by fuel consumption in burner and yield of plastic pyrolysis oil that produced. The experiment results showed that as the air pressure increased, all parameters were increased, that are fire temperature, the long of flame, fuel consumption in burner, and the yield of plastic pyrolysis oil that produced in the pyrolysis reactor.

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