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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 The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere.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 Biosorben Magnetik Ampas Kopi untuk Penyisihan Ion Timbal (Pb) Irza, Tsaqif Aufa; Khadafi, Muammar; Suhendrayatna, Suhendrayatna; Syaubari, Syaubari
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.v24i1.5083

Abstract

Industrial waste often contains heavy metals which are dangerous for human health and the environment, so effective and environmentally friendly waste processing is very necessary. This research aims to optimize the use of synthetic magnetic bioadsorbent from coffee grounds to remove the heavy metal lead (Pb) from industrial waste. Magnetic bioadsorbent was synthesized from coffee grounds by carbonizing the coffee grounds at a temperature of 600℃ for 3 hours and activated using 100 mL of 1 M HCl. The adsorption time and adsorbate concentration were tested at values of 30, 60, and 90, as well as 0.661, 1.494, 2.29, and 3 (mg/L) adsorbate, and adsorption temperatures of 30 ℃, 40 ℃, and 50 ℃. Meanwhile, carbonization temperature, coffee grounds weight, and activator concentration were used as fixed variables. In this research, the independent variables are adsorption time, adsorbate concentration, and adsorption temperature. while the fixed variables are carbonization temperature, coffee grounds weight, and activator concentration. The results of this research show that it was successful in linking the magnetite compound to the adsorbent and it can be seen from the results of FTIR analysis that there are FeO groups at a wave of 560 cm-1 and in the XRD characterization test, Fe groups are found at a wave of 35o, and based on the characterization using SEM there is a change in area surface before and after synthesis due to the presence of magnetite particles that stick to the surface, causing the pores to become smaller.
Pemanfaatan Ekstrak Wolffia untuk Pembuatan Masker Gel Peel-Off sebagai Perawatan Kulit Wajah Helvina, Puteri; Ridwan, Ridwan; Elwina, Elwina
Jurnal Teknologi Vol 24, No 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i2.5725

Abstract

Wolffia is one of the smallest plants in the world that has a very high content of protein and antioxidants. Protein has good benefits for producing and replacing dead body cells so that it is able to maintain healthy skin. Skin that is continuously exposed to free radicals can cause damage to the function of body cells. Prevention and protection suitable for warding off these free radicals is by using a peel off gel face mask and containing good antioxidant activity. The purpose of this study is to obtain the physical quality of the best peel-off gel mask preparations of wolffia extract and products. The research was carried out using the experimental design method by varying wolffia extract concentrations of 6%; 6.5%; 7%; 7.5%; 7.5%; and 8% with polyvinyl alcohol (PVA) concentrations of 12%; 12.5%; 13%; 13.5%; and 14%. Gel mask peel off wolffia extract organoleptic smells typical of wolffia plants, gel-shaped and deep green in color. The best product from the results of this study is found in the 21st product with a concentration of 8% wolffia and 14% polyvinyl alcohol. This product has a pH of 6 with a dry time at 05:44 minutes. Based on the IC50 value, the Antioxidant Activity obtained in the wolffia extract peel-off gel mask product is 6.837 μg/mL and is categorized in the classification of very strong antioxidant activity.
Pengaruh Bunga Telang (Clitoria Ternatea L.) dalam Pemurnian Minyak Jelantah dari Hasil Penggorengan KFC Jalanan Nur, Alfin; Zaini, Halim; Irwan, Irwan
Jurnal Teknologi Vol 24, No 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i2.5585

Abstract

Butterfly pea flower is a plant that is very familiar to Indonesian people, this flower has a bright purple color and contains antioxidants which can reduce levels of free fatty acids in used cooking oil. The purpose of this study was to determine the effect of variations of time on the refining of used cooking oil. The study conducted by analyzed the reduction of free fatty acid, different mass of  butterfly pea flower. The results showed that, the initial free fatty acid data was 6.13% and the final free fatty acid number was 1.37%, the lowest moisture content test was 0.4%, the highest antioxidant test result was 89.51%, the lowest peroxide number test was 4 meq O2/kg and the organoleptic test was 3.75. Based on these data, it can be concluded that this research was declared successful in processing of used cooking oil even though it did not meet the quality standards of the Indonesian National Standard (SNI).
Pembuatan Sirup Glukosa dari Biji Durian dengan Metode Hidrolisis Asam Fillah, Muhammad Ikhwan; Fauzan, Reza; Harunsyah, Harunsyah
Jurnal Teknologi Vol 24, No 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i2.5945

Abstract

The utilization of durian fruit that is consumed is the flesh part with a percentage of only 20-35%. Generally, seeds become waste that is only a small part utilized. Every 100 g of durian seeds contain 51.1 g of water, 46.2 g of carbohydrates, 2.5 g of protein and 0.2 g of fat. This carbohydrate content is higher than cassava 34.7% or sweet potatoes 27.9%. This high carbohydrate content allows durian seeds to be used as a substitute for glucose syrup. Therefore, research must be conducted by utilizing durian seed waste to make glucose syrup. The purpose of this study was to determine the effect of time and temperature on reducing sugar levels. The method for this study used the acid hydrolysis method and the search for reducing sugar levels used the lufft-schoorl method. This study used time variations of 60, 90, 120, 150, 180 minutes and temperature variations of 90, 95, 100, 105, 110°C in the acid hydrolysis method which used 3% HCl solvent. From the results of the study, it was found that hydrolysis time and hydrolysis temperature greatly influenced reducing sugar. The higher the time and temperature, the higher the reducing sugar content obtained. The highest reducing sugar content was obtained at 19.55% and the lowest water content was 16.30% which was obtained at a temperature of 110oC and a time of 180 minutes.
Pemanfaatan Selulosa Bakteri sebagai Bahan Baku Pembuatan Kertas Ramah Lingkungan Swara, Debbie Paras; Harunsyah, Harunsyah; Fachraniah, Fachraniah
Jurnal Teknologi Vol 24, No 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i2.5616

Abstract

The use of of cellulose from wood is growing every year in Indonesia. Continuous environmental harm results from this. In this study, paper was made using bacterial cellulose activator, tapioca flour, and coconut water as basic materials to make it more environmentally friendly. In this study, the impact of bacterial cellulose mass and tapioca flour mass on the final paper was examined. The amounts of 100, 125, 150, 175, and 200 g of bacterial cellulose and 5, 10, 15, 20, and 25 g of tapioca flour were the variables employed in this study. Additionally, the finished paper is tested for gramage, tensile strength, water content, functional group (FTIR), and a SEM test. According to the grammage test results, combinations of 100 g of bacterial cellulose and 25 g of tapioca flour had a higher grammage value than the others, 75 g/m2. The mass variation of 100 g bacterial cellulose with a mass of 25 g tapioca flour had the highest value in the tensile strength test, with a value of 0.808803 Mpa. In contrast, the mass variation of 100 g bacterial cellulose with a mass of 25 g tapioca flour had the greatest value in the water content test with a value of 5.91%.
Inovasi Pembuatan Sabun Padat Transparan Berbasis Minyak Kelapa Murni dengan Menggunakan Ekstrak Kulit Buah Naga sebagai Antioksidan Munawwarah, Munawwarah; Adriana, Adriana; Irwan, Irwan
Jurnal Teknologi Vol 24, No 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i2.5763

Abstract

This study aims to examine the effect of the volume of dragon fruit peel extract and NaOH on moisture content, pH, free fatty acids, free alkali and antioxidant activity in the resulting soap products. This research utilizes virgin coconut oil and dragon fruit peel extract. Dragon fruit skin contains various bioactive compounds such as polyphenols, vitamin C, vitamin E, vitamin A, alkaloids, terpenoids, flavonoids, thiamine, niacin, pyridoxine, cabolamine, phenolics, carotene and phytoalbumin so that it has pharmacological effects as an antioxidant. The independent variables used are variation of dragon fruit peel extract 0 mL, 2 mL, 4 mL, 6 mL, 8 mL, and variation of NaOH volume 12 mL, 14 mL, 16 mL. The tests carried out include pH test, water content test, free fatty acid test, free alkali test, antioxidant activity test using DPPH method, and organoleptic test. The results obtained the best transparent solid soap with the composition of dragon fruit peel extract 2 mL and NaOH 12 mL with pH 9.2, water content 11.21%, free fatty acids 1.394%, free alkali 0.368%. Antioxidant activity test was analyzed using UV-Vis Spectrophotometer. The analysis results showed the presence of antioxidant activity which is classified as strong at 46.23%. Based on the data obtained, it can be concluded that the transparent solid soap produced has reached the Indonesian National Standard (SNI).
Pengolahan Limbah Cair Industri Tahu Menggunakan Metode Aerasi dan Koagulasi dengan Biji Kelor (Moringa Oleifera) Ambia, Warisul; Dewi, Ratni; Rahmawati, Cut Aja
Jurnal Teknologi Vol 24, No 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i2.5586

Abstract

Tofu industrial waste is waste that contains high organic compounds, has the potential to damage the environment and needs to be followed up. This study used aeration and coagulation methods with moringa oleifera seed powder. The purpose of this study was to study the best time and mass of moringa seeds in removing COD (Chemical Oxygen Demand), TDS (Total Dissolved Solid) contaminants, conductivity, turbidity and pH of tofu industrial wastewater. This research was started by pulverizing moringa seeds then sieved with an 80 mesh sieve and heated at 105⁰C for 2 hours to reduce the water content. The process of aeration and coagulation was continued by varying the dose of coagulant 45; 55; 65; 75; 85 g and variation of stirring time 15; 30; 45; 60; 75; 85 minutes. Based on the research results, the best time and dose were 75 minutes and 75 g with a percentage of COD removal of 97.5%, turbidity 81%, TDS 32.45%, conductivity 27.01%, an optimum pH value of 4.2 was obtained. The FTIR characterization results obtained the highest peak of 2926.01 cm-1 indicating the presence of a carboxylic acid compound identifying the O-H functional group and experiencing a slight shift in the peak after coagulation and aeration of 2924.09 cm-1, there was no significant change in solid structure. From these results it can be concluded that moringa seed biocoagulant is able to reduce contaminants in tofu waste.
Penyisihan Warna Metil Merah dengan Metode Elektrolisis Menggunakan Elektroda Aluminium Soraya, Soraya; Sari, Ratna; Syafruddin, Syafruddin
Jurnal Teknologi Vol 24, No 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i2.5617

Abstract

The greater development of the textile industry has an impact on environmental pollution. Textile industry waste has a high dye content and contains synthetic materials that are difficult to decompose. One of the dyes used in the textile industry is methyl red. The removal of methyl red (C15H15N3O2) color by electrolysis method is carried out to treat this industrial waste. Therefore, this study aims to determine the effect of time and voltage variations on the removal of methyl red color by electrolysis method using Aluminum (Al) as electrode. This study was conducted by contacting artificial methyl red waste with DC Power supply tools that have been connected to electrodes at a time variation of 10, 15, 20, 25, and 30 minutes with voltage variations of 2, 4, 6, 8, and volts. Color removal results with an efficiency of 98.62% were obtained in a time variation of 10 minutes with a voltage of 2 volts. However, the research results obtained are not in accordance with the theory that the longer the time and the greater the voltage the color removal will also be greater.
Pemanfaatan Minyak Sereh Wangi sebagai Zat Aditif untuk Meningkatkan Karakteristik Biodiesel B30 Nisrina, Dian; Harunsyah, Harunsyah; Zaini, Halim
Jurnal Teknologi Vol 24, No 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i2.5726

Abstract

The use of petroleum as fuel is currently very limited and cannot be renewed on a relevant human scale. The increasing demand for petroleum, including diesel, has resulted in increased dependence on resources. The use of diesel as fuel has a negative impact on the environment. To reduce the negative impacts caused, other fuel derivative products can be developed, namely biodiesel. One alternative to increase fuel efficiency and reduce pollution is to reformulate fuel with additives, namely citronella oil, which functions to enrich the oxygen content in the fuel. The purpose of this study was to determine the effect of variations in the addition of citronella oil volume and temperature on the characteristics of B30 biodiesel. This study was conducted using an experimental design method by varying the volume of citronella oil 0; 2; 4; 6; 8; 10 mL and temperatures of 30°C, 35°C, 40°C, 45°C, 50°C. The results showed that the addition of citronella oil with temperature variations was able to improve the characteristics of B30 biodiesel. The best variation is the addition of 4 mL of citronella oil at a temperature of 40 °C resulting in the highest viscosity value of 4.318 cSt, density of 836.41 kg/m3, cetane number of 67.9 and flash point value of 79°C. In this study, the data produced is in accordance with SNI in terms of viscosity, density, cetane number, and flash point.
Pembuatan Komposit Poly Lactid Acid – Bentonit untuk Plastik Biodegradable Salsabila, Syifa; Ridwan, Ridwan; Sariadi, Sariadi
Jurnal Teknologi Vol 24, No 2 (2024): Oktober 2024
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v24i2.5594

Abstract

Plastic is one of the most important materials in human daily activities because of its versatility. Plastic usually comes from petroleum, so it can't be decomposed. This study aims to determine the effect of the ratio and temperature of mixing poly lactid acid and bentonite on the quality of biodegradable plastic products. With variations in the composition of PLA: Bentonite 17: 3 ; 15: 5; 13 : 7 ; and 11 : 9g and temperature variation when mixing PLA and bentonite 180℃, 190℃, 200℃, 210℃. The synthesized composites were tested for their mechanical strength to determine material characteristics and morphological observations. The results showed that addition of bentonite filler affects the mechanical properties and thermal properties of the material.. The highest tensile strength value was produced by the material with a variation of PLA and bentonite 13 : 7g at a temperature of 200℃ which was 15.29 MPa and the lowest tensile strength value was produced by a material with a variation of PLA and bentonite at a temperature of 190℃ of 1.89 MPa. The morphological tests showed that the surface structure of the 13g PLA and 7g bentonite samples during processing showed that the surface structure of poly lactic acid (PLA) was widely dispersed due to electromagnetic rays. In the Thermo Gravimetric Analyzer test, samples with modified PLA-bentonite with a PLA-bentonite degradation temperature for samples of 17:3 are 320 ℃ - 480 ℃. The degradation temperature of PLA-Bentonite for the 13:7 sample is 420℃ - 520℃.

Page 10 of 14 | Total Record : 136

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