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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 The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere.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 15 Documents
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Search results for , issue "Vol 24, No 1 (2024): April 2024" : 15 Documents clear
Analisa Kinerja Heat Recovery Steam Generation Akibat Perubahan Load Turbin Power Generator untuk Proses LNG Hub dan Efisiensi Operasional di Perusahaan Migas Muchlis, Muchlis; Sariadi, Sariadi; Harunsyah, Harunsyah
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.v24i1.5197

Abstract

Problems that occur with the HRSG will be calculated and performed by performance analysis of the equipment. With various methods and formulas that will be used. The aim of the research is to calculate HRSG efficiency before and after cleaning in power generation systems using Matlab software, determine the effect of HRSG efficiency before and after cleaning and understand how to optimize HRSG performance. HRSG efficiency calculations in this research were carried out by comparing the energy flow rate used to evaporate water, both in low pressure steam and high pressure steam and the energy flow rate contained in the exhaust gas from the gas turbine power plant system which is useful in HRSG. HRSG performance calculations based on changes in load for LNG hub operational business processes and operational efficiency in power usage, such as calculating mass balance, calculating energy balance, calculating HRSG performance efficiency in LNG hub operational conditions, calculating HRSG performance efficiency in actual conditions after the event LNG hub process and efficiency of power use in operations, comparison between HRSG performance efficiency in actual conditions and design data efficiency at commissioning. So the results obtained were an efficiency of 61.37% and there was a decrease in performance after being compared with the commissioning design data of 38.32%.
Sintesa Biokoagulan dari Chitosan dan Biji Kelor (Moringa Oleifera) untuk Menurunkan Kandungan Senyawa Organik dalam Limbah Cair Tahu Safitri, Putri Destia; Satriananda, Satriananda; Adriana, Adriana
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.v24i1.4990

Abstract

Tofu liquid waste contains high organic compounds that potential to pollute water bodies, so it must be treated before being discharged into the environment. This research investigated the processing of tofu liquid waste using natural coagulants Chitosan and Moringa seeds to remove organic compounds in tofu wastewater. The ratio of chitosan to moringa seeds was varied 0:100; 25:75; 50:50; 75:25 and 100:0%. Jar test method has been employed to conduct the experiment, in which the process of fast stirring was 120 rpm for 1-minute, slow stirring was 20 rpm for 20 minutes, and settling time were varied for 1, 2 and 3 hours. The variables measured include Chemical Oxygen Demand (COD), turbidity, pH and Total Disolved Solid (TDS). The best results were obtained at a coagulant ratio of 100:0 with a weight of 1 gram of chitosan and 0 gram of Moringa seeds at a deposition time of 3 hours. Under these conditions the removal of COD reached 71.87%, turbidity removal 81.65%, pH 5.7 and TDS removal 76.32%.
Ekstraksi Kalium dari Abu Kulit Buah Alpukat (Persea Americana Mill) Menggunakan Pelarut Aquades Mastura, Dewi; Zaini, Halim; Sami, 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.v24i1.5043

Abstract

One of the primary ingredients in avocado peel skin ash (Persian americana mill) is potassium, which can be utilized as an alkali source while producing soap. Avocado skin has a high potassium potential, which makes it ideal for extraction. Burning the potassium first and then continuing the extraction with distilled water as a solvent are two methods for obtaining potassium. In this investigation, the avocado peel was dried for 24 hours at 110 °C. A crusher is used to crush dried avocado skin into a powder that is then burned in a furnace for 5 hours at 500oC to create avocado skin ash. Variable extraction times are 30 minutes, 60 minutes, and 90 minutes, and the variable mass of avocado skin ash employed in this procedure is 5 g, 7.5 g, and 10 g. The variables for the extraction temperature are 60ºC, 70ºC, 80ºC. The optimum ash mass condition for this method is 7.5 gr, the best extraction temperature is 80oC, the best extraction duration is 90 minutes, and the best potassium concentration is 0.3 N. X-Ray Diffraction (XRD) analysis reveals that the predominant component in avocado skin ash is K2O.
Kombinasi Proses Koagulasi dan Aerasi Menggunakan Biji Asam Jawa (Tamarindus Indica) sebagai Biokoagulan pada Limbah Cair Industri Tempe Nahrawi, Muhammad; Dewi, Ratni; Harunsyah, Harunsyah
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.v24i1.4845

Abstract

The impact of the tempe industrial wastewater which has an organic content value if discharged directly into water bodies will endanger the environment. This is due to the large number of pollutant substances present in wastewater, which will cause a decrease in dissolved oxygen levels in wastewater. The purpose of this study was to determine the effect of the dose and timing of tamarind seed bio coagulant on the reduction of chemical oxygen demand (COD), total dissolved solid (TDS), conductivity, turbidity, and pH in tempe industrial wastewater. This research was started by reducing the size of tamarind seeds (brown) so that they became powder, after which they were sieved using an 80 mesh sieve and heated in an oven at 105 ⁰C for 2 hours to reduce the water content. The next process is coagulation and aeration by varying the mass of coagulant 5; 15; 25; 35; and 45 g and time variation of 15; 30; 45; 60; and 75 minutes. Based on the research results, it was found that the water content of tamarind seed powder was 8%, the optimum time and dose were at 75 minutes and 45 g with the percentage of removal of COD, turbidity, TDS, conductivity, and pH each of 97.5%; 61.48%; 19.89%; 16.39%; 3.8. The results of the FTIR characterization of the initial sample obtained a vibrational peak of 3172.90 cm⁻ˡ for the carboxylic acid compound identifying the O-H functional group. And experienced a new vibrational peak after the coagulation and aeration process, namely the alcohol compound identified the vibrational O-H functional group of 3876.92 cm⁻ˡ. From these results, it can be concluded that the tamarind seed bio coagulant can reduce the contaminants in the tempe industrial wastewater.
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.

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