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Jurnal Teknologi
Published by Politeknik Negeri Lhokseumawe
ISSN : 14121476     EISSN : 25500961     DOI : http://doi.org/10.30811/teknologi
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering
Jurnal Teknologi is a peer-reviewed journal that aims at the publication and dissemination of original research articles on the latest developments in all fields of technology and engineering sciences. The journal publishes original papers in Indonesian and English, which contribute to the understanding of engineering science and the improvement of engineering technology. Papers may be theoretical, experimental, or both, and applied engineering science and technology. The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere. The scope of Jurnal Teknologi includes a wide spectrum of technology and engineering science subjects including: Civil engineering; Mechanical engineering; Chemical engineering Electrical engineering; Information and technology; Computer science and engineering; Materials science and engineering; Renewable energy engineering;
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 76 Documents
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MEMBRAN SELULOSA SEBAGAI MEDIA ULTRAFILTRASI UNTUK MENURUNKAN KADAR BESI DALAM AIR - Faridah; - Efiana; - Saifuddin; - Jamaluddin
Jurnal Teknologi Vol 14, No 2 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i2.245

Abstract

The contain of iron ions in  water causes the  water color become brownish yellow and water become also smelly. There are any ways that can be done to eliminate the iron ions in the water, one of them  is by using  membrane as a filter medium. This study offered cellulose membranes which is able to reduce iron levels  in water by using various types of cellulose membranes, such as celluose membrane I  derived from derived from sugar juice, cellulose membrane II from coconut water and cellulose membrane III which is derived from the combaining of sugar juice  and medium coconut water. After the cellulose membranes were produced, it  then was applied to reduce iron ions in water.  The samples were taken from water wells in Geudong area which have the iron inons around 0,203 ppm and water  drilled wells  in Politeknik Negeri Lhokseumawe  area which contains the iron ions around 0.184 ppm. After using the cellulose membrane as ultrafiltration  for both of samples, it was found that the iron  ions contain in water had reduced. The best  cellulose membrane to be used was the cellulose membrane II  which is derived  from coconut water. The effecency of iron reduction was founded in artificial (sampel III) sampel around 91,73%, following sampel I from Politeknik Negeri Lhokseumawe  around 68,75% and sampel II from Geudong area around 59,46%. The results showed that the membrane of coconut water is able to reduce iron in the water with higher efficiency than other membranes
Penerapan Metode Multi Objective Optimization on the Basis of Ratio Analysis (MOORA) Sebagai Pendukung Keputusan Pemilihan Penerima Program Mahasiswa Wirausaha (Studi Kasus : Universitas Sriwijaya) Rahmat Dwian; Anita Desiani; Sugandi Yahdin
Jurnal Teknologi Vol 21, No 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (314.709 KB) | DOI: 10.30811/teknologi.v21i2.2432

Abstract

Program Mahasiswa Wirausaha (PMW) of Sriwijaya University is one of the facilities for Sriwijaya University students who have an interest in entrepreneurship. There are 5 criteria in selecting PMW proposals based on Sriwijaya University, namely product innovation and originality, market potential/market opportunities, production processes, organization, and investment plans. In PMW 2019, there were 304 proposals submitted and 146 proposals were approved for funding. The proposal selection process by Sriwijaya University only accumulates the judges' scores for each criterion manually. In this study, the MOORA method was applied as decision support which proposals were eligible to fund. Starting from weighting the criteria, calculating the normalized matrix, multiplying each criterion weight by the normalized matrix, and sorting the product from highest to lowest. In the calculation results, there is a data similarity of 92.97% in the results of the MOORA method with the results from Sriwijaya University. This shows that the MOORA method can be used as a consideration in selecting PMW proposals for the following year.
Penggunaan Metode Analytic Network Process (ANP) Untuk Pendukung Keputusan Pemberian Bonus Karyawan Nadia Ulfa; Muhammad Arhami; Muhammad Rizka
Jurnal Teknologi Vol 21, No 1 (2021): April 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (518.736 KB) | DOI: 10.30811/teknologi.v21i1.2206

Abstract

The decision support system is a system that can provide problem-solving abilities and communication skills for problems with semi-structured and unstructured conditions, such as determining which employees deserve a bonus. The decision-making process is a frequent occurrence and is at the core of activities at PT Perta Arun Gas, one of which is to determine bonuses for employees by calculating the average value of criteria for each employee, not counting the values of related criteria. The system designed is a decision-making system to determine employees who get bonuses using the Analytic Network Process (ANP) method, this ANP method can calculate the related criteria values. ANP is a method that accommodates the relationship between criteria and alternatives. The criteria used are, professional at work, politeness (behavior), presence, loyalty (a sense of ownership of employees towards the company), responsibility, cleanliness tidiness, and discipline. The test results indicate that this system can solve the problem of determining the distribution of bonuses to employees so that it can help in selecting employees who receive the bonus.
Analisis Unbalanced Load Flow pada Jaringan Listrik Pembangkit Listrik Tenaga Mikrohidro dengan Metode Injeksi Arus (Current Injection) Maimun -; Fauzan -; Radhiah -
Jurnal Teknologi Vol 16, No 1 (2016): April 2016
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (439.513 KB) | DOI: 10.30811/teknologi.v16i1.320

Abstract

In this study the unbalanced load flow analysis with current injection method (current injection) is performed on the electrical grid amid lower that in the electricity grid micro hydro power (MHP) plant in order to determine the characteristics and efficiency of the electricity grid. The case studies carried out on the electrical grid  Cokro Tulung Klaten district. MHP Cokro Tulung the MHP stand alone (stand alone) airport beben-load is inductive beruapa AC electric motor 3 (three) phase that is used to pump water to the water-boom and loads such as lighting, also the burden of household appliances. Power flow studies in an unbalanced state or unbalaced load flow analysis with current injection method (current injection) is performed with the aid of a software program ETAP 7.0. Based on the results of the analysis result unbalaced load flow with the current injection method (current injection) has been done on the electrical grid MHP Cokro Tulung, it was found that the active power losses in total (ΔPT) arising on the power grid MHP full load current of 268.442 W or 0.714% of the total power (37.58 kW). Voltage drop occurs in sktr amounted to 1.123 V or 0.295% of its nominal voltage (380 V). Voltage drop occurs in SUTR respectively 6.994 V or 3.179% of its nominal voltage (220 V). So the power loss (ΔP) and the voltage drop (ΔV) arising on the power grid MHP Cokro Tulung is still small, so the efficiency of the electricity network is still quite good
SISTEM PENAKARAN AIR UNTUK PROSES PEMBUATAN ADONAN ROTI Aidi Finawan
Jurnal Teknologi Vol 14, No 2 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i2.254

Abstract

Scale of water for industrial bread dough on a household scale is still done manually, measured with a graduated container. Failures bread making process are  often caused by  inappropriate dosage of  water needs  due to the negligence of the workers.. Therefore, it is necessary  to figure out how to control the dosing of water easily to the dough that is   accordance to  the composition of flour needed. This research  showed  a water dosing system for dough bread flour depending on the needs of the composition. A graduated system of  the water can be applied to the  bread maker mixer and can be used for both  at home scale  or bakery industry. The mean error in testing showed frm 0,0040% to 0,0059% choice for bread and sweet bread choice. Both of these values showed  low percentage of mistakes,and it can be concluded  that a graduated system can be applied to a graduated water in the process of making bread dough
Pemurnian Bioetanol Dari Limbah Kulit Kopi Dengan Menggunakan Zeolit Alam dan Batu Gamping Sri Mutia Heriwati; Zahra Fona; Adriana Adriana
Jurnal Teknologi Vol 21, No 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (171.579 KB) | DOI: 10.30811/teknologi.v21i2.2428

Abstract

In this research, zeolites were used to increase the levels of ethanol distillation process results of laboratory Department of Chemical Engineering Politeknik Negeri Lhokseumawe. Ethanol yield after distillation process only reaches 20.66%, to increase the concentration of ethanol used advanced treatment is by the adsorption method. The results were obtained optimum ethanol concentration, ie 38.67% with a contact time of 8 hours and 80 mesh size. the refractive index and density of 1.33960 and 0.798. bioethanol with 3 g of limestone can eliminate moisture content up to 29.36%; the activation treatment adsorption process of bioethanol with adsorbent zeolite, limestone, and limestone following the zeolite with Freundlich isotherm with adsorption capacity of each 4.5 mg / g; 5.7 mg / g; and 6.4 mg / g.
Implementasi Decision Tree pada Social Network Yunda Heningtyas
Jurnal Teknologi Vol 16, No 1 (2016): April 2016
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (462.166 KB) | DOI: 10.30811/teknologi.v16i1.326

Abstract

The strategy of business today is no longer done traditionally. By the presence of internet, marketing strategies can be done with the wider reach. Viral marketing is a new program in an electronic format that was created to assist in the marketing of products by making the consumer as an object to spread the advertising of a product. Abundant data from the social network has the potential information that can be utilized for virtual marketing. Social network analysis using a decision tree will produce a potential users and a pattern that could affect the user is to distribute advertising the product. Result is rules that contains the attributes which can influence the pattern indicate users to execute of the strategy business of viral marketing
SINTESA MONO-DIGLISERIDA MELALUI REAKSI GLISEROLISIS ENZIMATIS Eka Kurniasih
Jurnal Teknologi Vol 14, No 1 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i1.260

Abstract

Mono-Diglycerides are compounds which had properties as a lowering the surface tension. These characteristics of mono-diglycerides are widely used as an emulsifier in food and cosmetic industries. Mono-diglycerides can be synthesized through enzymatic reactions using triglycerides, which contained in many fats and oil. One of potential raw material used as raw material of mono-diglycerides is coconut oil which contains fatty acids C6-C18. The synthesis of mono-diglycerides are generally done through chemical reactions involving solid catalyst at high temperature, thus affecting to the resulting product. To solve this problem, in this research, synthesis of mono-diglycerides done by glyserolisis enzymatic reaction using papain enzyme to replace chemical catalysts. The the research showed  that the increasing concentration of papain enzyme did not give a significant influence on the percentage reduction in free fatty acids. But in the papain enzyme concentration of 5% (w/w) and at mole ratio of coconut oil:glycerol (1:10) it obtained the highest product conversion. From the gas chromatografi analysis, it is known that triglyceride had been converted as much as 62.7691% into mono-diglycerides
PERMODELAN MEKNISME EMPAT BATANG PENGHUBUNG PADA MESIN PENANAM PADI DENGAN MENGGUNAKAN SOFTWARE SOLIDWORKS - Marzuki; Samsul Bahri; - Usman
Jurnal Teknologi Vol 14, No 2 (2014): Jurnal Teknologi
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v14i2.246

Abstract

Wet rice cultivation management system and method of rice cultivation in Aceh are still done traditionally. These activities are requiring the expertise of a very high order to obtain a same pattenr of  spacing and a short time planting . Heterogeneity of plant spacing will have an impact on the seed growth and caused  the  delay of planing, the farmers would find it  difficult to do  weeding, fertilizing and spraying. This study aims to determine the design of mechanism parameters of four link bar design  for modeling mechanism in order to obtain the optimum parameters of the locus of planting. Design tools of rice growers is  using the four link bar mechanism which is able to work mechanically to take the rice seedlings from hoper and plant it with the same pattern  spacing, closing the planting hole, reducing the time of planting and of course make the  operational costs efficiently . The methods used in this research  are the design of the prototype and the design of functional and structural approaches. This research has produced a prototype component of the combined mechanisms of rice cultivation four link bar mechanism which is driven by a chain mechanism. Functional and structural testing  gave the performance planting mechanism which can move the locus of decision-continuous form of seeds and planting seeds for the six rows
Pengaruh Penggunaan Ternary Blend Fly Ash Dengan Volume Tinggi dan Abu Sekam Padi Terhadap Kuat Tekan Beton Mutu Tinggi Sofa Rizki; Syamsul Bahri; Sulaiman Sulaiman; Hanif Hanif; Aiyub Aiyub; Cut Yusnar
Jurnal Teknologi Vol 21, No 2 (2021): Oktober 2021
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (127.509 KB) | DOI: 10.30811/teknologi.v21i2.2433

Abstract

This study aims to find the effect of ternary blended: cement, fly ash (FA), and rice husk ash (ASP) on the compressive strength of high-strength concrete.  The composition of FA and ASP used for cement replacement were 0%, 10% ASP, 30% FA, 10% ASP+30% FA, 10% ASP+40% FA, and 10% ASP+50% FA.  The water-cement factor (FAS) and binder used are 0.3 and 500 kg/m3 fresh concrete, respectively.  The specimens used for compressive strength is cubes of 100×100×100 mm with tests at the age of 1, 3, 7, 28, and 56 days.  The results showed that the use of 10% ASP increased the compressive strength of the concrete compared to the control concrete but required more superplasticizers.  The use of 30% FA as a cement substitute showed a decrease in compressive strength compared to control concrete but reduced the use of superplasticizer.  The use of a combination of FA and ASP as a substitute for cement showed a decrease in compressive strength under control concrete and concrete using 30% FA.  The decrease in the compressive strength of concrete with the combination of ASP and FA is beyond the initial expectation.  This may be due to the disproportionate use of FA compared to ASP so that the reaction that occurs is not optimal to form calcium silicate hydrate (CSH).  However, the use of ternary blended cement, FA, and ASP still has added values which is better workability than without using FA.

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