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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 The articles submitted to Jurnal Teknologi should be unpublished before and not under consideration for publication elsewhere.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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Analisis Pengaruh Konsentrasi Perekat Tepung Tapioka terhadap Pengurangan Kadar Abu pada Briket Tempurung Kelapa Napitupulu, Robert; Pratama, Randa Julio; Dharta, Yuli
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6258

Abstract

Binder is a crucial component in briquette production, serving to consolidate charcoal particles into a solid form. This study aims to analyze the effect of tapioca starch concentration as a binder on the reduction of ash content in coconut shell briquettes. The binder concentrations used were 10%, 15%, and 20% of the total material mixture, with ash content testing conducted according to SNI 01-6235-2000 standards. The briquette production process included raw material preparation, mixing, molding, and drying. The results showed that binder concentration significantly affected the briquette's ash content. Lower binder concentrations resulted in reduced ash content, with the optimal ash content of 1.52% achieved at a 10% binder concentration. Excess binder tended to increase ash content due to residual binder that did not fully combust. These findings highlight the importance of controlling binder concentration to improve the quality of coconut shell briquettes as an alternative fuel source.
Application of the Coagulation Jar Test Method for the Treatment of Coal Wastewater in Industrial Wastewater Management M.T., Ridwan,; Nahar, Nahar; Irwan, Irwan; Hasanah, Uswatun
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6437

Abstract

The coagulation test for coal wastewater was conducted using the jar test method to evaluate the performance of different coagulants under varying pH and dosage conditions. The coagulants used were FeCl₃, Al₂(SO₄)₃, and Poly Aluminium Chloride (PAC). The optimal conditions were determined by adjusting the pH (5, 6, 7, and 8) and varying the coagulant dosage at each pH level. The parameters analyzed included turbidity, pH, total suspended solids (TSS), and metal content. Laboratory results indicate that PAC is the most effective coagulant for reducing contaminants in coal wastewater. The optimal coagulation conditions were achieved at pH 8 with a PAC dosage of 1 ppm. The coagulants function by destabilizing colloidal particles, with their efficiency influenced by solubility and pH conditions. FeCl₃ and Al₂(SO₄)₃, as cationic coagulants, exhibit pH-dependent solubility, significantly lowering the pH of treated water compared to PAC. Conversely, PAC performs optimally in alkaline conditions and induces a smaller pH reduction. Overall, PAC demonstrated superior coagulation performance, achieving turbidity of 2.06 NTU, TSS of 5 mg/L, Fe content of 0.11 mg/L, Mn content of 0.01 mg/L, and Al content of 0.01 mg/L. These findings confirm that PAC is the most effective and efficient coagulant for treating coal wastewater.
Penggunaan Fly Ash dalam Pembuatan Bata Beton untuk Meningkatkan Daya Kuat Tekan Napitupulu, Robert; Triyanto, Romy Ade; Juanda, Juanda
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6195

Abstract

Coal is an alternative energy that is used as energy for electricity generation and so on. The results of burning coal produce several wastes that are difficult to process and reuse, one of the wastes produced is fly ash, fly ash waste has several contents similar to cement material, one of which is silica. Use of fly ash as an additive to concrete bricks. This research aims to determine the effect of using fly ash as an additional material on compressive strength tests on concrete bricks and  to determine the highest and lowest values of the composition of fly ash and sand. In this research, we will use the full factorial method to determine the number of specimens that will be made in the research, variations in the composition of fly ash: sand used are 30%: 40%, 20%: 50%, and 10%: 60%, with a ratio of cement: water fixed 2 : 1 and drying for 3 and 5 days. Compressive strength testing will be carried out on 6 specimens with 3 replications on each specimen so that the total number of specimens tested is 18 specimens. Based on the results of the best compressive strength test on specimen No.1 with a mixture of fly ash (30%): sand (40%), with a drying time of 3 days, the average maximum strength was 56,86 kg/cm2.
Pengaruh Minyak Atsiri Bunga Kenanga (Cananga Odorata) dalam Formulasi Body Lotion Berbasis Minyak VCO Ahmad, Fachraniah; Elwina, Elwina; Amalia, Zuhra; Habibah, Ummi
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6673

Abstract

This study aims to examine the effect of the addition of kenanga essential oil on the manufacture of body lotion as an antibacterial with VCO oil as the basic ingredient. VCO oil is very good for the skin and to add to the advantages of the body lotion, kenanga oil is added as an anti-bacterial and anti-oxidant ingredient for the skin. The body lotion formula used is the formulation of ingredients using Virgin Coconut Oil (VCO), olive oil, rose water, and beeswax. This research was conducted by mixing the three ingredients, namely olive oil, beeswax and VCO. Then heat it at 50°C, then homogenized. Next, rose water and ylang ylang oil were added to the mixture. All ingredients were then stirred until evenly distributed, ensuring the homogeneity of the resulting lotion. Then the product was analyzed including antioxidant test, bacterial test, and organoleptic test. Organoleptic test was conducted to determine the characteristics of the physical properties of the body lotion produced including aroma and moisture. body lotion is a very strong antioxidant (IC50 value 50). For the 10 mL VCO variation, the 8 mL essential oil variation shows the best IC50 value of 16.71 µg/mL  and the 20 mL VCO variation, at 8 mL essential oil shows the best IC50 value of 14.39 µg/mL. The results of the analysis after the use of body lotion with a sample of 8 mL essential oil and 20 mL VCO there are fewer colonies with a value of 3 APM colonies / gram, the sample still meets the requirements of microbial contamination according to SNI because it does not exceed 3 APM / gram and in accordance with SNI body lotion 2016.
Pembuatan Deodoran Spray Alami Berbasis Daun Sirih Hijau (Piper Betle L.) Nuriennabila, Nuriennabila; Sari, Ratna; Satriananda, Satriananda
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6336

Abstract

Problems of cleanliness and body odor often reduce a person's self-confidence. The use of natural spray deodorants based on green betel leaves (Piper betle L.) was developed as a safer alternative to synthetic deodorants. This study aims to determine the effect of variations in the concentration of propylene glycol and betel leaf extract on the physical properties of spray deodorants, such as specific gravity, viscosity, pH, and skin irritation, and to evaluate the safety of the product in daily use. Betel leaves were extracted using the maceration method with 96% ethanol solvent, and the spray deodorant formulation was made with variations in the concentration of propylene glycol of 3%, 4%, 5%, 6%, and 15%, and betel leaf extract of 0.1%, 0.2%, 0.3%, 0.4%, and 0.5%. The results showed that the formulation with a 5% propylene glycol concentration gave the best results, in accordance with SNI standards for specific gravity (1.0185), viscosity (0.516 cP), and pH (4.5), which are within the standard pH range of 4.4-7 for cosmetic products. In addition, the concentration of betel leaf extract of 0.5% produced the highest organoleptic test value with a score between 3.7 and 4.7, indicating that this product is safe to use without causing significant skin irritation.
Perancangan Sistem Pengendalian Temperatur pada Proses Pemanasan dengan Listrik Menggunakan Motor Servo sebagai Aktuator Azhar, Azhar; Darni, Yuli; Lesmana, Donny; Irfan, Muhammad Muslim; Rianto, Yoga
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6548

Abstract

The heating process is very common in many industrial fields. The heating process usually uses steam as a heating medium, especially in large-scale industries. In small-scale industries, heating with electricity is more effective and energy efficient. This study aims to examine the ability of the servo motor as an actuator to regulate the temperature in the electric heating process. The servo motor used is MG995 DC (5 Volt) with a rotation of 180O and a torque of 10 kgf/cm. The servo motor is used to rotate the potentiometer lever to regulate the power supply to the heating system. This servo motor is controlled by a PID control system with feedback input parameters in the form of DC voltage obtained from the conversion of the process temperature value (OC) using a type-K thermocouple with a sensitivity of 41V /OC. The feedback voltage from the amplified thermocouple voltage is then compared with the set point voltage (the desired process temperature value). The results of the study indicate that the servo motor can work well as an actuator to maintain the process temperature because of its accuracy in regulating the potentiometer rotation position with a PWM control range between 5% and 10%. Based on the findings of this study, it can be said that servo motors can be used as accurate actuators in regulating the supply of electrical power for electrical heating systems in industry.
Komposit Berpenguat Serat Resam dengan Uji Tarik sebagai Material pada Pembuatan Joran Pancing Abdallah, Fajar; Rollastin, Boy; harwadi, harwadi
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6196

Abstract

This research aims to obtain the appropriate composition in the production of alternative materials for fishing rods with fiber-resin reinforcement, as well as to determine the tensile and bending test results for the alternative material to be used as fishing rods. This study uses a full factorial method to determine the number of spesimens to be made, with variations in fiber-resin composition: the number of fibers used is 5, 10, and 15 strands, with a resin-to-catalyst ratio of 50:1 and drying times of 1 hour, 2 hours, and 3 hours. Tensile strength tests were performed on 9 spesimens with 3 replications, and bending tests were conducted on 9 spesimens with 3 replications per spesimen, resulting in a total of 54 spesimens tested. Based on the best tensile test results, the spesimen with 15 strands of fiber soaked for 2 hours in a 5% NaOH solution achieved a tensile strength of 46.2 MPa, while the lowest tensile strength was obtained from the spesimen with 5 strands of fiber soaked for 2 hours, which was 19.9 MPa. The average tensile test results showed a maximum value of 38.4 MPa
Optimasi Kinerja Fuel Gas Booster Compressor (K-750X B) dalam Menyediakan Bahan Bakar Bertekanan Tinggi di Unit 75 PT. X dengan Simulasi Hysys Nurraiyan, Nurraiyan; Sami, Muhammad; Elfiana, Elfiana
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6352

Abstract

Fuel Gas Booster Compressors play a critical role in process industries by increasing the pressure of fuel gas from low to high levels to meet operational requirements. This study aims to optimize the performance of the Fuel Gas Booster Compressor (K-750X B) at Unit 75 PT. X using Aspen HYSYS simulation. Optimization is conducted by analyzing the effects of operational parameters, including flow rate, pressure, and feed gas temperature from the dehydration unit, on compressor performance. The research methodology involves collecting actual operational data from the Distributed Control System (DCS) and field measurements, simulating the process using Aspen HYSYS, and validating simulation results with real operational data. The simulation results indicate significant discrepancies between actual and theoretical operating conditions, particularly in terms of flow rate, pressure, and temperature. The actual flow rate was found to be 2.125 m³/s, significantly lower than the theoretical 5.616 m³/s. Additionally, the feed suction and discharge temperature and pressure exhibited declines, impacting the compressor’s efficiency. This study confirms that simulation-based optimization provides valuable insights into improving the operational efficiency of Fuel Gas Booster Compressors
Analisis Kinerja Insinerator Menggunakan Sistem Monitoring Suhu dan Gas Buang Gunawan, Gunawan; Supardin, Supardin; Idwar, Idwar; Rahmawati, Rahmawati; Mardiyanto, Arief
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6662

Abstract

Waste management is a challenge because landfills are almost full. Incineration is a vital solution in waste management because it can significantly reduce waste volume and eliminate hazardous substances through a high-temperature combustion process of at least 600 °C, thereby helping to reduce waste accumulation in landfills and its impact on the environment. Monitoring temperature and exhaust gas is essential to ensure combustion efficiency and maintain emissions within safe limits. This study aims to design and implement an accurate real-time monitoring system to support incinerator management to be more efficient and environmentally friendly. Temperature monitoring uses a thermocouple sensor and the MAX6675 module, exhaust gas emissions use MQ7 and MQ135 sensors to detect CO and CO2. The thermocouple sensor used has an accuracy level of 99.23%, while exhaust gas monitoring uses an MQ-135 sensor to measure CO2 with an accuracy of 98.93 % and an MQ-7 sensor for CO with an accuracy of 92.14 %. No-load incinerator temperature testing showed a peak temperature of 323 °C, which then decreased due to fuel depletion. Testing with waste load showed the temperature increased more slowly but reached a higher peak of 616 °C. During the combustion process, CO content increased to 150 ppm during incomplete combustion, while CO2 peaked at 6,000 ppm and then decreased as complete combustion progressed. Future expectations require improvements in air flow regulation and the application of a scrubbing system to optimize combustion and reduce emissions.
Pemanfaatan Limbah Kulit Kopi dan Tempurung Kelapa menjadi Briket Biomassa Furqan, Muhammad Haikal; Elfiana, Elfiana; Amalia, Zuhra
Jurnal Teknologi Vol 25, No 1 (2025): April 2025
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v25i1.6282

Abstract

Non-renewable fuel energy that is increasingly depleted is a concern of many people and many practitioners and academics are starting to try to make alternative fuels derived from renewable resources. The process of making briquettes from coffee skin waste and coconut shells has been carried out by the carbonization method. To find the effect of variations in raw materials on the quality of briquettes and to find what is the best adhesive content on the quality of briquettes produced includes several tests, namely water content, ash content, calorific value and burning rate based on SNI. The manufacture of coffee husk and coconut shell briquettes was carried out with variations of raw materials 0: 100, 25: 75, 50: 50, 75: 25, 100: 0 and adhesive variations of 8%, 10%, 12%, 14% and 16%. From the test results, the ratio of raw materials is good in the ratio of 0:100, 25:75 and 50:50 with 8%-12% adhesive. With the test results of water content 4.36 - 7.06 (%), the results of ash content 3.74 - 6.18 (%), the results of the combustion rate 0.257 - 0.215 (g/min), and the results of calorific value 6345.99 - 5705.94 (cal/g).

Page 12 of 14 | Total Record : 136

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