cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Ana siti nurmasyithah
Contact Email
anasitinurmasyithah@gmail.com
Phone
+6282366756766
Journal Mail Official
jstr@pnl.ac.id
Editorial Address
Jalan Banda Aceh-Medan Km 280.3 Buketrata Lhokseumawe
Location
Kota lhokseumawe,
Aceh
INDONESIA
Jurnal Sains dan Teknologi Reaksi
Published by Politeknik Negeri Lhokseumawe
ISSN : 1693248X     EISSN : 25491202     DOI : http://dx.doi.org/10.30811/jstr
Core Subject : Science, Education, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Education Engineering Materials Science & Nanotechnology
Jurnal Sains dan Teknologi Reaksi atau boleh disingkat dengan nama JSTR, berfokus pada banyak Aspek Teknik Kimia, seperti: Teknik Reaksi Kimia, Teknik Kimia Lingkungan, Energi Fosil dan Terbarukan, serta Sintesis dan Pengolahan Material.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 318 Documents
 26   27   28   29   30 
THE PRODUCTION OF SWEET BREAD SAFE FOR DIABETICS REFERRING TO SNI 01-3840-1995 Safitri, Pipit
Jurnal Sains dan Teknologi Reaksi Vol 22, No 02 (2024): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v22i02.6093

Abstract

ABSTRACT Sweet bread for diabetes is whole wheat bread rich in fiber, B vitamins, and phytochemicals. The content of whole wheat flour and corn flour has a lower glycemic index, which helps manage blood sugar levels. The production of sweet bread involves variations of palm sugar in amounts of 10, 20, 30, 40, and 50 grams, as well as variations in whole wheat and corn flour. Testing to ensure the bread is suitable for consumption includes tests for moisture content, ash content, microbial contamination, and organoleptic tests. From the test results, the moisture content in sample 7, using whole wheat flour with 10 grams of palm sugar, was 27.18%, while sample 16, using corn flour with 5 grams of palm sugar, had a moisture content of 28.80%. The best ash content results were found in sample 7 with whole wheat flour and 10 grams of palm sugar, yielding 0.40%, and sample 16 with corn flour and 5 grams of palm sugar, yielding 0.20%. The organoleptic test results were satisfactory, as indicated by blood sugar checks in diabetic patients, and the best microbial contamination test result was scored at 4.Keywords: Bread, Diabetes, Palm Sugar, Whole Wheat Flour, Corn Flour.
ENGINE 5 FUEL RATIO OPTIMIZATION WITH LOAD FEEDBACK CORRECTION USING VAMPSET SOFTWARE TO REDUCE SPECIFIC GAS CONSUMPTION (SGC) AT PT PLN NUSANTARA POWER ARUN GENERATION UNIT Yusrizal, Y; Zulkifli, Z; Rihayat, R
Jurnal Sains dan Teknologi Reaksi Vol 22, No 01 (2024): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v22i01.6147

Abstract

ABSTRACTFuel Ratio Optimization with 3% Load Feedback Correction to Reduce Specific Gas Consumption (SGC) at PLTMG Arun is a test in the field of power plants that focuses on optimizing the SGC Engine of PLTMG by looking for a fuel mixture composition that produces optimal efficiency of the generating engine and is safe for the reliability of the plant. In 2023, the SGC target is 8600 BTU/kWh. The highest SGC value of one of the engines in 2023 is in Engine 5 of 9327.27 BTU/kWh with an average exhaust gas temperature of 528°C, while the lowest SGC value in Engine 10 is 8,481 BTU/kWh with an average exhaust gas temperature of 532°C. The difference in exhaust gas temperature shows that there is an unused potential for heat energy in engine 5, causing a significant difference in SGC. This test aims to optimize the combustion point using a structured method calculation reference, maintain the engine exhaust gas temperature in accordance with the commissioning limits, lower the SGC and increase efficiency, then it will be obtained as a reference as the basis for changes from the AFR. For AFR tuning from the initial condition, i.e. load feedback = load output generator, it will then be converted to load feedback load output generator. The method used is to use the load feedback correction method by modifying the analog value scale of the output of the Power Monitoring Unit (PMU) from the initial condition of 4-20 mA = 0-12000 kW to the modified condition of 4-20 mA = (0-(12000+x%) kW, where this condition adjusts from the allowable combustion results according to the lean burn diagram from the manufacturer. From the implementation in October 2023, the SGC value decreased from the previous 9327.27 BTU/kWh to 9177.87 BTU/kWh. In addition, there was an increase in plant efficiency from 36.54% to 37.14, an increase in EAF from 98.34% to 98.91%, a decrease in EFOR from 1.37% to 0.09% and a decrease in GPHR from 2350,473 Kcal/KWh to 2312,673 Kcal/KWh.keyword: Engine, fuel ratio, specific gas consumption, commissioning, load feedback, efisiensi, exhaust gas temperature.
FORMULATION AND CHARACTERISTICS OF SOLID PERFUME FROM LEMONGRASS OIL WITH VARIATION BEESWAX AND ESSENTIAL OIL Yunus, Muhammad; Amalia, Zuhra; Ridwan, R; Aida, Atiqah; Ilmi, Awanis
Jurnal Sains dan Teknologi Reaksi Vol 22, No 02 (2024): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v22i02.6171

Abstract

ABSTRACT The potential availability of abundant essential oil plants in Indonesia is very beneficial for the community. One of the essential oil plants that can be utilized for its potential is citronella. Citronella oil can be formulated into solid perfume as an innovation to replace liquid perfume. This study aims to formulate and characterize solid perfume from various variations of beeswax concentration (30%, 40%, 50%), citronella (1%, 3%, 5%) and several note parfume. The solid perfume was characterized by observing the density value, boiling point value, organoleptic test and functional group test. The results showed that the highest density value of 0.9786 gr/ml and the melting point value of 69°C were in the 50% beeswax formulation and 1% citronella oil concentration. The lowest solid perfume density value of 0.9350 gr/ml and melting point value of 61°C were in the 30% beeswax formulation with 5% citronella oil concentration. FT-IR testing results, the solid perfume produced has the same functional groups in the mixture of raw materials made. This indicates that no new compounds are formed. The results of organoleptic testing show that solid perfume with 40% beeswax composition and 1% concentration is the most preferred. Keywords: Solid Perfume, Citronella Oil, Beeswax, Density
APPLICATION OF BIODRYING TECHNOLOGY IN THE PROCESSING OF BRIQUETTES FROM ORGANIC WASTE IN LHOKSEUMAWE CITY Nurkuzaifi, Muhammad; pardi, p; Putra, Alfian
Jurnal Sains dan Teknologi Reaksi Vol 22, No 02 (2024): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v22i02.6094

Abstract

ABSTRACT Waste is unwanted waste material after the end of a certain process. There are various processes that can be applied to produce dry waste using biodrying technology. The purpose of this study is to study biodrying technology for the processing of organic waste in Lhokseumawe City to become briquettes and the length of the biodrying process on the quality of briquettes produced from EM4 variations. This study used two independent variables, namely 14 and 21 days of biodrying process and EM4 variations, namely 100 ml, 200 ml, 300 ml, 400 ml and 500 ml. The results of this study show that those that meet the SNI No.1/6235/2000 standard are only ash content testing, volatility content and flame length test, while the moisture content test does not meet SNI No.1/6235/2000 standard.Keywords: Organic waste, biodrying and SNI No.1/6235/2000.
Utilization of Polyurethane with Bentonite-Chitosan Filler As an Anti-Corrosion Paint Izzati, Isra Adelya; Rihayat, Teuku; Putra, Alfian
Jurnal Sains dan Teknologi Reaksi Vol 22, No 02 (2024): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v22i02.6148

Abstract

ABSTRACTIn this study, the manufacture of polyurethane uses bentonite-chitosan filler materials to improve the ability of heat resistance. The characteristics carried out were assessed in terms of functional group analysis, heat resistance analysis, morphological structure analysis, corrosion test and paint thickness test. The coating process has the advantage of being able to protect the iron surface from environmental influences that result in corrosion of the metal. This study aims to see the effect of mixing polyurethane with Bentonite-Chitosan filler. The sample formulation used was polyurethane with variations of bentonite and chitosan of 2%, 4%, 6%, 8%. The results of the Fourier Transform Infra Red (FT-IR) test showed that there were functional groups N-H, C-H, C=O. Based on the results of the Thermogravimetry Analysis (TGA) test, the Polyurethane sample with 8% bentonite modification : chitosan 8% b/b had the best thermal stability among other samples where the sample began to degrade (on set) at a temperature of 307.04 (oC) and stopped degrading (end set) at a temperature of 399.50 (oC). In the Polyurethane sample with 2% bentonite modification/8% chitosan b/b had lower thermal stability where the sample began to degrade (onset) 293.09(oC) and stopped degrading (end set) at 348.32(oC). The results of the morphological test using SEM tools showed that the chitosan chain was well dispersed into the bentonite interlayer. The corrosion test showed that the addition of bentonite and chitosan affected the corrosion rate, the greater the composition of bentonite and chitosan, which could reduce the corrosion rate. The best sample with a ratio of Polyurethane/Bentonite/Chitosan 8:8 % b/b experienced the smallest corrosion rate of 5.79 mpy and mass loss of 0.10 grams.Keywords : Biodegradable, Corrosion, Polyurethane, Bentonite, Chitosan
UTILIZATION OF ACTIVATED CARBON FROM COCONUT SHELLS IN THE BLEACHING PROCESS OF CRUDE PALM OIL (CPO) Novrizal, Yedil; Sari, Ratna; adriana, A
Jurnal Sains dan Teknologi Reaksi Vol 22, No 02 (2024): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v22i02.6088

Abstract

CPO (Crude Palm Oil) is the result of processed palm fruit in the form of crude oil so that it needs to be refined so that it can be used by consumers, one of the purification processes of CPO (Crude Palm Oil) is to use the bleaching process. The purpose of this study is to determine the effect of activated carbon size, temperature and bleaching process time on the crude palm oil (CPO) produced. This study used three independent variables, namely the size of activated carbon (120/150, 150/180 and 180/200) mesh and bleaching temperatures of 150oC, 160oC, 170oC and bleaching times of 50 minutes, 60 minutes and 70 minutes. The results showed that the higher the temperature and time in the bleaching process, the lower the level of free fatty acids in CPO both in the size of activated carbon (120/150, 150/180 and 180/200) mesh. In activated carbon, the ash content did not meet the SNI 06-3730-1995 standard while the moisture content met the standard. For CPO (Crude Palm Oil) after the bleaching process, the  best results were obtained at a particle size of 120/150 mesh with a temperature of 170oC and a time of 70 minutes. Keywords: Crude palm oil (CPO), activated carbon, and bleaching
EFFECT OF PRE HEATER AND ECONOMIZER ADDITION ON ACID VALUE IN SPLITTING UNIT AT PT ENERGI OLEO PERSADA Mubarak, Salman; Rahmawati, Cut Aja; Nurdin, Irwan
Jurnal Sains dan Teknologi Reaksi Vol 22, No 02 (2024): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v22i02.6199

Abstract

ABSTRACT Temperature Problems and Stability of Fatty Acid Quality Become One of the Important Factors in the Occurrence of Hydrolysis in a Splitting Reactor Where Quality Instability Often Occurs in the Fat Splitting Hydrolysis Process, The Addition of Pre Heater and Economizer Provides a Significant Acid Value Stability Impact Judging From the Results of Analysis Conducted Within 12 Hours of Hydrolysis Process Time. With Several Temperature Variations Starting From 110 - 120 OC, Optimum Acid Value Conditions Are Obtained at 120 OC with the Maximum Acid Value Results at Acid Value 208.08. The combination of the addition of Pre Heater and Economizer can increase the efficiency of continuous steam use that can reduce production costs and ensure the stability of the temperature of the material that will enter the splitting reactor, the temperature can be varied to adjust the required heat needs in order to achieve a more perfect hydrolysis by considering economic aspects.Keywords: Preheater,Economizer, Acid Value, Hidrolisa, Splitting
CALCULATING THE NUMBER OF GAS PILOTS AND LNG CIRCULATING IN THE MABOG LINE (MARINE BOIL OF GAS) COOLING SYSTEM AT PT. PERTA ARUN GAS Birri, Chairul; Sariadi, S; Elwina, E
Jurnal Sains dan Teknologi Reaksi Vol 22, No 01 (2024): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v22i01.6144

Abstract

ABSTRACTAlong with the development of PT. Perta Arun Gas, the challenges to refinery operations also have a significant impact, the company is expected to be able to minimize even the slightest losses that may occur during the industrial process. One of them is that in the flow of the LNG distribution (loading) process to ships, the formation of Boil-Off Gas (BOG) as a result of the expansion in the loading room is inevitable. So that the BOG that forms must be eliminated so as not to cause overpressure in the ship's tank, the B-6803/4 marine flare facility is available to burn the formed BOG so as not to pollute the environment if the gas is directly discharged into the atmosphere. The main tool in this recovery system is the Atomizer, which aims to reduce the temperature of the BOG by atomizing a certain amount of LNG with pressurized vapor gas into the BOG input flow so that heat transfer occurs so that it is in accordance with the specifications of the compressor feed temperature. After a series of calculations, it was found that the total LNG and gas buffer needed to be able to cool the MaBOG line during the loading process with an estimated time of 12.3 hours was 305.6 m3 for LNG and as much as 0.069 mmscfd for gas buffer. This need is in the background with the adjustment of the outlet temperature setting of the second section atomizer (V 6805/13-24) is -140 °C and with the input temperature in HV-68108 which is -80 °C. In addition, after obtaining a calculation model to obtain the value of LNG and gas buffer requirements, the author also tried to conduct some systematic analyses on the influence of LNG and gas buffer requirements on changes in BOG inlet temperature using MS. Excel.keyword : LNG, Boil-Off Gas, Buffer Gas
KAJIAN PENGEMBANGAN PENYEDIAAN AIR BERSIH BERBASIS DESALINASI SEAWATER REVERSE OSMOSIS (SWRO) UNTUK MENDUKUNG IRIGASI PERTANIAN Husna, Alya Hafidza; Nurlilasari, Puspita; Januardi, Januardi
Jurnal Sains dan Teknologi Reaksi Vol 23, No 01 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i01.6528

Abstract

Krisis air bersih akibat perubahan iklim dan eksploitasi sumber daya air mengancam sektor pertanian, terutama dalam penyediaan air irigasi yang berkelanjutan. Teknologi Seawater Reverse Osmosis (SWRO) menjadi solusi potensial dengan mengubah air laut menjadi air tawar yang memenuhi standar kualitas untuk irigasi. Penelitian ini mengembangkan model konseptual penyediaan air berbasis SWRO yang dirancang khusus untuk sektor pertanian di Indonesia. Model ini mencakup sistem pre-treatment inovatif yang menggunakan Multi Media Filter (MMF), Dissolved Air Flotation (DAF), dan Activated Filter Media (AFM) untuk meningkatkan efisiensi filtrasi dan mengurangi fouling membran. Hasil kajian menunjukkan bahwa pendekatan ini dapat mengoptimalkan kualitas air, efisiensi energi, serta biaya operasional dibandingkan metode konvensional. Dengan demikian, SWRO berpotensi menjadi solusi berkelanjutan dalam mendukung ketahanan pangan dan pengelolaan air di wilayah dengan defisit air.  
SLOPE STABILITY ANALYSIS OF DISPOSAL AREA WITH GROUNDWATER TABLE AND MATERIAL DENSITY VARIATIONS USING THE BISHOP METHOD Oziana, Deea Rizki; Ramadhandi, Farhan; Hulwani, Zati; Harisman, Hendra; Alam, Pocut Nurul
Jurnal Sains dan Teknologi Reaksi Vol 23, No 01 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v23i01.7365

Abstract

Slope stability is crucial in mining activities, particularly in disposal areas composed of loose materials with varying geotechnical conditions. Groundwater level and material density are significant factors that influence slope stability. This study aims to analyze the effects of groundwater level variations and material density on the safety factor of disposal slopes using the Bishop method within the GeoStudio SLOPE/W software framework. The research was conducted in a coal mine disposal area, divided into three cross-sections: A–A’, B–B’, and C–C’. Simulations were performed under three conditions: unsaturated (normal), saturated (due to intense rainfall), and threshold (the maximum critical condition still considered stable). The results show that rising groundwater levels significantly reduce the slope’s safety factor (SF). Under saturated conditions, the SF for all three cross-sections dropped below 1.0, indicating unstable slopes. Specifically, the SF declined from 1.15 to 0.72 for section A–A’, from 1.16 to 0.55 for B–B’, and from 1.18 to 0.81 for C–C’. In contrast, an increase in wet material density led to only moderate reductions in SF, with values remaining above 1.0. The combination of high groundwater levels and increased material density poses a critical risk factor for potential slope failure. Continuous hydrogeological monitoring is therefore essential to ensure the long-term stability of mine disposal areas. Keywords: slope stability, groundwater table, material density

Page 28 of 32 | Total Record : 318

 26   27   28   29   30 

Filter by Year

2003 2025


Reset
Filter By Issues
All Issue Vol 23, No 01 (2025): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 22, No 02 (2024): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 22, No 01 (2024): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 21, No 01 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 20, No 02 (2022): Jurnal Sains dan Teknologi Reaksi Vol 20, No 01 (2022): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 19, No 02 (2021): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 19, No 01 (2021): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 18, No 02 (2020): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 18, No 01 (2020): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 17, No 2 (2019): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 17, No 1 (2019): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 16, No 2 (2018): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 16, No 2 (2018): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 16, No 1 (2018): Jurnal Sains dan Teknologi Reaksi Vol 16, No 1 (2018): Jurnal Sains dan Teknologi Reaksi Vol 15, No 2 (2017): JURNAL SAINS DAN TEKNOLOGI REAKSI Vol 15, No 1 (2017): Jurnal Sains dan Teknologi Reaksi Vol 15, No 1 (2017): Jurnal Sains dan Teknologi Reaksi Vol 14, No 2 (2016): Jurnal Sains dan Teknologi Reaksi Vol 14, No 1 (2016): Jurnal Sains dan Teknologi Reaksi Vol 12, No 2 (2014): Jurnal Sains dan Teknologi Reaksi Vol 12, No 1 (2014): Jurnal Sains dan Teknologi Reaksi Vol 11, No 2 (2013): Jurnal Sains dan Teknologi Reaksi Vol 11, No 1 (2013): Jurnal Sains dan Teknologi Reaksi Vol 10, No 2 (2012): Jurnal Sains dan Teknologi Reaksi Vol 10, No 1 (2012): Jurnal Sains dan Teknologi Reaksi Vol 9, No 2 (2011): Jurnal Sains dan Teknologi Reaksi Vol 9, No 1 (2011): Jurnal Sains dan Teknologi Reaksi Vol 8, No 2 (2010): Jurnal Sains dan Teknologi Reaksi Vol 8, No 1 (2010): Jurnal Sains dan Teknologi Reaksi Vol 7, No 2 (2009): Jurnal Sains dan Teknologi Reaksi Vol 7, No 1 (2009): Jurnal Sains dan Teknologi Reaksi Vol 6, No 2 (2008): Jurnal Sains dan Teknologi Reaksi Vol 6, No 1 (2008): Jurnal Sains dan Teknologi Reaksi Vol 5, No 2 (2007): Jurnal Sains dan Teknologi Reaksi Vol 5, No 1 (2007): Jurnal Sains dan Teknologi Reaksi Vol 4, No 2 (2006): Jurnal Sains dan Teknologi Reaksi Vol 4, No 1 (2006): Jurnal Sains dan Teknologi Reaksi Vol 3, No 2 (2005): Jurnal Sains dan Teknologi Reaksi Vol 3, No 1 (2005): Jurnal Sains dan Teknologi Reaksi Vol 2, No 2 (2004): Jurnal Sains dan Teknologi Reaksi Vol 2, No 1 (2004): Jurnal Sains dan Teknologi Reaksi Vol 1, No 2 (2003): Jurnal Sains dan Teknologi Reaksi Vol 1, No 1 (2003): Jurnal Sains dan Teknologi Reaksi More Issue