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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 The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere.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 136 Documents
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Karakterisasi Biobriket dari Peuyeumisasi Sampah Pasar Berdasarkan Perbedaan Ukuran Partikel dan Bentuk Biobriket Hafizal, Muhammad; Saifuddin, Saifuddin; Elfiana, Elfiana
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.5202

Abstract

One alternative energy source to replace coal is biobriquettes. It is time for Indonesia to look for other alternative energy sources, switching from nonrenewable fossil fuels to renewable sources and environmentally friendly raw material energy sources for Municipal Waste. Biobriquettes are an alternative energy source derived from biomass which can replace energy originating from fossils. Factory waste, municipal waste and organic waste can be utilized and then converted into solid raw materials with compaction results that are more effective, efficient and easy to use. The research variables are cube, hexagonal, block, cylinder and coin briquette shapes by changing particle sizes of 20 mesh, 40 mesh, 60 mesh, 80 mesh, and 100 mesh  without a sieve. The results of the research obtained data on a calorific value of 4,121 Cal/gram from a cylindrical shape measuring 80 mesh, a water content test of 1.2% was obtained from blocks and coins measuring 20 mesh, an ash content test of 8.04% was obtained from a cube shape sample measuring 20 mesh and The volatile content test of 6.92% was obtained from a 20 mesh cylindrical shape. Based on this information, it is possible to deduce that  this research does not meet the Indonesian National Standards (SNI).
Isolasi dan Karakterisasi Senyawa Capsaicin dari Cabai Rawit (Capsicum Frutescens L.) sebagai Bahan Aditif Pangan dengan Metode Ekstraksi Sokletasi Khairani, Khairani; Adriana, Adriana; Pardi, Pardi
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.4996

Abstract

Cayenne peppers have quite high economic value, but cayenne peppers are a type of fruit that is easily damaged by freezing. Therefore, proper post-harvest handling is needed, one of which is by extracting the spicy compounds in chilies. This research aims to increase the yield of capsaicin, determine the effect of drying time on the quality of capsaicin and crystallize capsaicin extract. The drying time used was 8; 10; 12; 14 hours. Cayenne pepper extraction was carried out using the soxhletation method at a temperature of 80°C and ethanol as a solvent, with a ratio of 1:7; 1:8; 1:9; 1:10 (w/v), after the extraction process, evaporation is carried out to obtain a concentrated extract of cayenne pepper. After obtaining a concentrated extract of capsaicin, a crystallizing compound, namely maltodextrin, is added to obtain capsaicin crystals. Drying time of 14 hours produces the lowest air content, namely 13.5%. The capsaicin yield was 22.17%. The capsaicin compound is insoluble in water but soluble in chloroform. The spiciness level of capsaicin is quite spicy with a value of 12,551.56 SHU. The capsaicin composition detected through GCMS analysis was 56.32% at a retention time of 42.87 minutes containing 563.2 ppm capsaicin. The research results showed that drying time and solvent ratio had an effect on the capsaicin yield, the longer the drying time and the greater the amount of solvent, the greater the capsaicin yield.
Pembuatan Biofoam dari Pati Singkong dengan Tambahan Serat Selulosa dari Jerami Padi sebagai Filler Muspira, Nazira; Fachraniah, Fachraniah; Syafruddin, Syafruddin
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.5093

Abstract

Biodegradable foam made from starch is an alternative packaging to replace styrofoam, but foam made from starch is very fragile, sensitive to water. Additional treatment is required to increase strength, flexibility and resistance to water for commercial application. The addition of rice straw cellulose as a filler to improve the properties of the resulting biofoam. Rice straw that has been fermented using MA-11 is then washed and sieved using a 100 mesh sieve to produce cellulose. The process of making biodegradable foam uses the extrusion method. The variables used were the ratio of cassava starch and rice straw, namely 40:60, 45:55, 50:50, 55:45, 60:40 % w/w with variations in cooking time, namely 30 minutes, 40 minutes, 50 minutes, 60 minutes, 70 minutes. The results of biodegradable foam testing from cassava starch and rice straw obtained values of tensile strength, compressive strength, water absorption, and biodegradability. The tensile strength and compressive strength tests for all biofoam samples did not meet SNI standards. The results of the water absorption test that met the SNI standards were sample 45:55 minutes 30 with a value of 26.72%, and the results of the biodegradation test met the SNI standards, namely the sample 60:40 in 30 minutes with a value of 82.27% with a biodegradation time of 7 day.
Pengaruh Jenis Aktivator terhadap Karakteristik Karbon Aktif Berbahan Ampas Tebu Zazira, Annisa Zia; Fachraniah, Fachraniah; Ridwan, Ridwan
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.4973

Abstract

A study was done to determine the effect of activator type on the properties of activated carbon generated from sugarcane bagasse. The goal of this research is to examine the effect of activator type and activation period on the quality of activated carbon derived from sugarcane bagasse. This study's procedure began with the manufacture of activated carbon from sugarcane bagasse. The dried sugarcane bagasse was heated until it produced charcoal. In 150 cc of each activator solution, 10 g of charcoal were dissolved. It was then heated and left for the set activation time treatment. Three experiments on the properties of activated carbon were performed, namely moisture content, ash content, and iodine adsorption capacity (I2) for activation times of 6 hours, 9 hours, 12 hours, 15 hours, and 18 hours. According to the findings of this study, the kind of activator had little effect on the moisture and ash content of activated carbon, but it had a considerable effect on the iodine adsorption capacity of activated carbon. Furthermore, the activation duration influences the moisture level, ash content, and iodine adsorption capacity of activated carbon. The moisture material, ash content, and iodine adsorption ability (I2 ) of activated carbon (AC) from sugarcane bagasse satisfied the criteria of the Indonesian National Standard (SNI) in this study. Bilimbi (Averrhoa bilimbi L.) was the most effective activator in this investigation, with an engagement time of 6 hours.
Pemanfaatan Bubuk Kulit Sukun (Artocarpus altilis) Sebagai Adsorben Pemurnian Minyak Jelantah Rusna, Rusna; Sami, Muhammad; Rihayat, Teuku
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.5042

Abstract

Cooking oil is used by the general public to produce waste known as used cooking oil, both in households and small or large industries.  The procedure most often used to manage used cooking oil waste is purification.  Adsorption with adsorbents is an effective and efficient used cooking oil purification process.  Adsorption with breadfruit peel powder is one method for removing used cooking oil.  The aim of this research is to determine the absorption capacity of breadfruit peel adsorbent (Artocarpus altilis) on used cooking oil originating from fast food restaurants by using a heating process as well as the mass and temperature of the best breadfruit peel (Artocarpus altilis) adsorbent that can purify used cooking oil.  The results of this research were the use of breadfruit (Artocarpus altilis) peel powder adsorbent with a mass of 8;  9;  10;  11 and 12 grams by varying the temperature 80;  85;  90;  95;  100oC and heating time 45 minutes.  Adsorption products were analyzed for water content, peroxide value and free fatty acids.  The best water content is at a temperature of 100oC, namely 0.07%;  0.06%;  0.07%;  0.05% and 0.03% with an initial water content of 2.46%, the best peroxide value is at a temperature of 100 oC with a mass of 11 grams, namely 8 mek/g with an initial peroxide value of 30 mek/g and the best free fatty acids  at a temperature of 100 oC with an adsorbent mass of 12 grams of 0.20% with an initial free fatty acid of 1,33% .
Sintesis dan Karakterisasi Biodiesel Berbasis Minyak Jelantah Mengunakan Metode Rute Non-Alcohol Humaira, Nur; Zulkifli, Zulkifli; Saifuddin, Saifuddin
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.5174

Abstract

Biodiesel as an alternative fuel to replace diesel has a very important function for the availability of long-term energy supply. The purpose of this study was to determine the effect of reactant ratios and the use of catalysts on the characteristics of biodiesel from used cooking oil using the non-alcoholic route. This research was conducted using the non-alcoholic route method by varying the reactant ratio (1:2, 1:3, 1:4, 1:5, 1:6) mol and varying the KOH catalyst (0.2; 0.3; 0.4 ; 0.5; 0.6)% of the mass of used cooking oil. The results showed that the reactant ratio of 1:6 and 0.6% catalyst was the best result by producing 0.16% FFA, viscosity of 3.5 cSt, density of 860 kg/m3, heating value of 8916.826 Kcal/g, cetane number of 76.8. From the results of the analysis above, it shows that the biodiesel produced is included in the SNI 04-7182: 2015 standard.
Pengaruh Penambahan Ekstrak Daun Kecombrang (Etlingera Elatior) sebagai Inhibitor Korosi Baja Karbon dalam Media Air Laut Hayati, Ratnal; Sariadi, Sariadi; Yunus, Muhammad
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.4974

Abstract

Carbon steel is a type of metal that is widely used in industry. However, carbon steel has a weakness, namely that it corrodes easily. One way to control corrosion is by adding inhibitors. The use of organic inhibitors is preferred considering the negative impact of inorganic inhibitors. In this research, kecombrang leaf extract was used as organic inhibitors. The kecombrang leaf extract has the –OH and CH functional groups which can be adsorbed by metal surfaces and can inhibit corrosion. Determination of the rate of corrosion in carbon steel using the weight loss method in sea water media. The results of the research obtained that kecombrang leaves which got the best results using the weight loss method based on concentration variants, namely 0,1,3,5, and 7 mL and soaking times of 3, 6, 9, and 12 days, which shows that the corrosion rate decreases with increasing concentration of kecombrang leaf extract. In varying concentrations, the optimum inhibition efficiency was found at a concentration of 7 mL and at 12 days immersion time, namely 75.88% and the corrosion rate was 0.9735 mpy so this result was the best corrosion rate test. Analysis of the carbon steel surface using SEM shows that the carbon steel surface has been protected by a layer of kecombrang leaf extract inhibitor.
Optimasi Unit Desalinasi Air Laut dengan Alat Seawater Reverse Osmosis (Membran) pada Unit PLTU Sulbagut I Gorontalo Mengunakan Metode Pendekatan Response Surface I-Optimal Design Expert Imaruzi, Nashru; Zulkifli, Zulkifli; Rihayat, Teuku
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.5068

Abstract

Indonesia is still experiencing an energy crisis. One of the efforts that has been made by the Government is to build various new power generation facilities and optimize existing power plants. As for the PLTU cycle, demineralized water is required to be obtained from fresh water, so the role of a desalination plant is needed to provide fresh water. This project was to evaluate and optimize the role of the seawater desalination units using seawater reverse osmosis membrane devices at the Sulbagut I Gorontalo PLTU unit using the response surface I-optimal design expert approach. Optimization of seawater desalination work is carried out by observing the reverse osmosis membrane process in the desalination unit. The main equipment involved in the desalination process is the reverse osmosis membrane module, SWRO high pressure pump, turbo charger energy recovery device, chlorine reductant and antiscalant dosing. The working principle of desalination optimization is analysis using formulations and graphics from Design Expert with the I-Optimal Response Surface method with observational data using actual operating conditions. Analysis and testing of the model condition results obtained from the design expert, with the model analysis results obtained a set up goal will be carried out with the maximum parameters of the production parameters which get optimization results in the form of membrane inlet pressure at a set point of 4,938 MPa which is the best and most efficient and optimal optimization result where this parameter is applied to get optimal production results in quality and quantity.
Pemisahan Oli Bekas Menggunakan Alat Separator dengan Media Pemisah Karbon Aktif dan Kardus Bekas Nur Hasanah, Mutia; Fauzan, Reza; Putra, Alfian
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.5175

Abstract

This research was conducted to separate used oil using a separator with activated carbon separation media and used cardboard. The treatment was carried out with time variations (minutes) 5, 10, 15, 20, and 25. With variations in the composition of used oil 2%, 4%, 6%, 8%, and 10%. Oil collection as a sample was carried out at a motorcycle workshop in Gampong Java, Banda Sakti District, Lhokseumawe City. The results of the study were tested for characteristics, pH, total dissolved solid (TDS), turbidity, and chemical oxygen demand (COD) in accordance with quality standards. These results show that pH, turbidity and TDS decrease with the longer the time left for sampling the separation results. Meanwhile, TDS and COD there are some samples that are still slightly below standard. With the influence of the residence time of sampling of sampling separation results, the results of the characteristic test are getting better and more stable. The results of this study show that used oil separation media using activated carbon and used cardboard can be used as a prevention of environmental pollution.
Komposit Berpenguat Serat Resam Dengan Matrik Polyester Sebagai Bahan Alternatif Peredam Suara Zakaria, Zakaria; Napitupulu, Robert; Pranandita, Nanda
Jurnal Teknologi Vol 24, No 1 (2024): April 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i1.4980

Abstract

Resam is a type of fern or fern that usually grows in shady and humid areas. This plant has not been used as a raw material for making sound absorbers, even though resam is found in the Bangka Belitung Islands Province area so that the raw material is easy to obtain. The purpose of this research is to determine composites with resam fibre reinforcement as an alternative soundproofing material. Making sampels using hand lay-up method and research design using full factorial method. The process variables in this study are the volume fraction of 5%: 95%, 10%: 90%, 15%: 85% and the length of NaOH immersion for 60, 90, 120 minutes and the testing frequency of 125Hz, 500 Hz, and 4000Hz. Based on the results of this study, the highest overall frequency sound absorption coefficient was obtained in sample no. 6, with a volume fraction of fibre and matrix of 15% : 85% and 90 minutes of NaOH immersion of α = 0.243. While the lowest overall frequency sound absorption coefficient value is in sample no 3, with a volume fraction of fibre and matrix of 15% : 85% and 60 minutes of NaOH immersion of α = 0.193. So the composite with resam fibre reinforcement based on ISO 11654 can be used as an alternative sound absorbing material.

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