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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
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DEVELOPMENT OF CHITOSAN-FILLED POLYURETHANE COMPOSITES AS ANTIBACTERIAL COATING PAINT Nurlaili, N
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.4812

Abstract

Polyurethanes are generally made from petroleum-based polyols, but the current state of petroleum is depleting. The availability of petroleum, which is currently decreasing, encourages other parties to look for new alternatives. One alternative that can be used is palm oil. Technological developments that continue to increase are now also a reference for the development of antibacterial polyurethane coating paints which are carried out by adding another filler, namely chitosan. This study aims to determine the effect of variations in the weight of chitosan as an antibacterial agent through morphological analysis of Surface Scanning Electron Microscopy (SEM), heat resistance test with Thermo Gravimetry Analyzer (TGA), and Bacterial activity test. The analysis process was carried out with variations in the weight of chitosan (2; 3; 4) % w/w). The test results showed that the best polyurethane coating paint was with a variation of 4% w/w chitosan filling. This is because the more addition of chitosan, the better it will be in inhibiting bacterial activity.Keywords : Chitosan, Composites, Polyols, Polyurethanes, TDI
OPTIMIZATION OF THE USE OF SCANNING ELECTRON MICROSCOPY (SEM) EQUIPMENT IN THE CHEMICAL ENGINEERING DEPARTMENT OF LHOKSEUMAWE STATE POLYTECHNIC Syafari, S
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.v22i01.5736

Abstract

The purpose of this training is to optimize the use of chemical engineering laboratory equipment, namely Scanning Electro Microscopy (SEM), to improve the understanding and experience of students of the Lhokseumawe State Polytechnic, Department of Chemical Engineering. The methods used in this community service activity are intensive training, preparation of efficient usage protocols, and integration of SEM analysis results in research and teaching projects. At the end of this training activity, a question and answer session and assistance in the use of the tool were held to strengthen students' understanding of the training provided. Community service activities on optimizing the use of the Scanning Electro Microscopy (SEM) tool have been running well and optimally, and training participants stated that they were able to operate the tool and understand how to analyze samples using the Scanning Electro Microscopy (SEM) tool. Keywords:Laboratory,SEM,Chemistry,Optimization
THE EFFECT OF TEA DWAGES AND EM4 IN MANUFACTURING FERTILIZER FOR THE GROWTH OF CAYYEY CHILLI Jefri, Muhammad; Rihayat, Teuku; Fachraniah, F
Jurnal Sains dan Teknologi Reaksi Vol 21, No 02 (2023): JURNAL SAINS DAN TEKNOLOGI REAKSI
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jstr.v21i02.4817

Abstract

Good quality organic fertilizer is useful for improving and maintaining soil fertility. In its application, this organic fertilizer is generally given through the soil but can also be given through the leaves. This research aims to determine the effect of tea dregs and the effect of the amount of EM4 on the growth of cayenne pepper, the results of stem height growth in cayenne pepper plants (Capsicum frutetences. L) by administration of EM4 and Tea Dregs with doses of 5;10;15;20;25 ml and Tea Dregs 50;100;150;200;250 and 250 grams have different characteristics, based on the statistical data it states the differences in dosages of the variables. 2, namely 10 ml/ 250 grams of tea dregs, dominates the growth of stem height in cayenne pepper plants.Keywords: Brown Sugar, Husk Charcoal,Cow Dung,The Dregs, EM4, Yellow Soil.
OPTIMIZING THE PERFORMANCE OF CHARGE AIR COOLER (CAC) AS A HEAT TRANSFER MEDIUM TO IMPROVE ENGINE RELIABILITY AT PT PLN NUSANTARA POWER UP ARUN Abdi, Faisal; Dewi, Ratni; Yunus, Muhammad
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.v22i01.6149

Abstract

ABSTRACTEquipment performance is one very important thing to be maintained by a company or related agency in order to keep production or work activities running smoothly. Heat Exchanger is a common equipment that we find in many companies and related agencies. Leakage, corrosiveness is common in a heat exchanger or heat exchanger equipment. PT PLN Nusantara Power has a Charge Air Cooler (HE) as a heat exchanger medium between air for the combustion process and cooling water in each engine to help the electricity production process. For this reason, this analysis aims to see the reliability of engines 1 to 10 seen from the ratio of the effectiveness value of the calculation results to the effectiveness value of the commissioning results and compare the operational parameters in the field with the results of the hysys simulation. From the results of the calculation analysis, the highest effectiveness value on engine 3 was 92.759 % which was influenced by the ratio of the actual heat transfer rate value compared to the maximum heat transfer rate value. This result is of course as expected where the effectiveness value of the air cooler charge must be greater than 90%. Similar to engine 3, the other nine engines also have an effectiveness value of 90%, meaning that in terms of performance the charge air cooler is still able to work optimally. In the input of hysys simulation data, a difference in data between the incoming air temperature data from the data input in hysys and operational data in the field was obtained. This can be caused by the large value of the discharge of the two flows, readings in the field, as well as the need for calibration data in the field for the reading of equipment performance indicators such as flow indications, pressure indicators, temperature indicators, and so onKeywords : Engine, Corrosion, Heat exchanger, effectiveness, hysys
UTILIZATION OF ARABICA COFFEE WASTE (coffea arabica) AS AN ADDITIVE IN THE PRODUCTION OF AROMATHERAPY CANDLES (scanted candle) USING PARAFFIN AND STEARIC ACID AS RAW MATERIALS Auliza, Wulan
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.v22i02.6091

Abstract

ABSTRACTAromatherapy candles are an alternative application of aromatherapy through inhalation, producing aromas that provide therapeutic effects when burned. They serve as alternative medicine, decoration, and room fragrance. The purpose of creating aromatherapy candles is to enhance home decor while supporting a healthy living aroma through the therapeutic process. This research was conducted to formulate and test the physical properties of aromatherapy candles using a combination of stearic acid and additives (coffee). Natural materials that can be used for making aromatherapy candles include coffee grounds. Physical property tests were carried out, including organoleptic tests, burn time tests, flame height tests, and melting point tests. The best research result for stearic acid was 6 grams in sample 1 with 30 grams of coffee grounds. The best result for flame height was 2 grams in sample 1 with 10 grams of coffee grounds, and the best melting point result was 30 grams of coffee grounds with a melting point of 50-58°C. This research was conducted according to the SNI standard for aromatherapy candles. Keywords: Aromatherapy Candles, Essential Oil, Paraffin, Stearic Acid
CREATION OF LOCAL MICROORGANISMS (MOLES) WITH THE USE OF HOUSEHOLD VEGETABLE WASTE AS A STARTER/DECOMPOSER FOR COMPOST FERTILIZER MAKING Mukarramah, Cut; Harunsyah, H; Nahar, N
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.v22i01.6145

Abstract

ABSTRACTLocal Microorganisms (MOL) are microorganisms made from natural materials as a medium for the development of microorganisms that are useful for accelerating the destruction/decomposition of organic matter (the process of decomposition into compost/organic fertilizer). In addition, it can also function as additional nutrients for plants, Local Microorganisms contain macro and micro nutrients and also contain microbes that have the potential to be a catalyst for organic matter, growth stimulants and as plant disease pest control agents. Based on the content contained in the MOL, MOL can be used as a decomposer, biofertilizer, and as an organic pesticide. This type of research is an experiment, by making a formulation of MOL solution based on the content/concentration of coconut water in the MOL solution, the bacterial content in the sample based on laboratory testing of Samples 1.2 and 3 with values (3.57 x 106 CFU/ml, 3.86 x 106 CFU/ml and 3.94 x 106 CFU/ml). The purpose of making the formulation of MOL solution in this study is to see the effectiveness of local microorganisms (MOL) in accelerating/shortening the time of the decomposition process of organic waste in making compost, the fastest decomposition value/time in samples 1-4 with the amount of stsrter/decomposer solution used 1 liter requires a decomposition time of 5 weeks.Keywords: Local Microorganisms, Starter/Decomposer, Compost Fertilizer
THE EFFECT OF CRITICAL PARAMETERS ON THE OIL SEPARATOR VESSEL (102D1) TO REDUCE THE VALUE OF FATTY ACID ESTER (FAE) IN THE GLYCERIN WATER PRETREATMENT UNIT AT PT. DOMAS AGROINTI PRIMA Siswanto, Rudi; Salmyah, S; Harunsyah, H
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.v22i02.6151

Abstract

ABSTRACTGlycerin water produced from the hydrolysis process in the splitting column still contains impurities such as oil or fatty acids that are carried along with glycerin water or other impurities found in the raw oil itself such as solid particles and gum. Oil or fatty acids that are still present in glycerin water must be removed or lowered to the maximum permissible limit before further processing in glycerin evaporation units and glycerin distillation units. The quality standard set for glycerin water is the value of fatty acid ester (FAE) in glycerin water. Glycerin water will be treated first in the glycerin water pretreatment unit to remove the oil and fatty acid content. Oil separator vessel (102D1) is one of the tools in the glycerin water pretreatment unit, is one of the important ones to control in the glycerin water pretreatment unit. Where in this oil separator vessel there will be an initial separation between oil and fatty acid with glycerin water. Optimization of separation in oil separator will determine the decrease in FAE value in (102D1) treated glycerin water end product. Observations were made on the oil separator vessel, namely temperature and pH to see both parameters of this process against the decrease in the value of fatty acid ester, data collection for temperature and pH was carried out 3 times a day for 6 days for each still paremeter to determine the value of fatty acid ester. From the observed data on the oil separator device, there are two parameters that determine the separation of oil and fatty acid from glycerin water, namely temperature and pH. The results obtained that temperature and pH greatly affect the value of fatty acids, where the higher the temperature, the lower the FAE value, from the observation data the optimum temperature is 90 – 95 oC. pH also greatly affects the value of fatty acid ester after oil separator, where the clover's pH is low in its fatty acid ester value. From the observed data, the optimum pH is pH 2 – 3.5Keywords: Fatty Acid Ester, Oil Separator, Pretreatment Glycerin Water, pH, Temperatur
THE INFLUENCE OF YLANG-YLANG ESSENTIAL OIL (cananga odorata) AND VIRGIN COCONUT OIL (VCO) ON THE CHARACTERISTICS OF HAND & BODY LOTION Febrina, Sarah
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.v22i02.6092

Abstract

ABSTRACT This study aims to explore the influence of ylang-ylang essential oil (Cananga odorata) and virgin coconut oil (VCO) on antioxidant, antibacterial, and organoleptic properties in the production of hand body lotion. Ylang ylang oil is known for its various health benefits, including antioxidant and antibacterial properties, while VCO is increasingly popular as a functional food oil with anti-inflammatory and antimicrobial properties. The methods used include distillation to produce essential oil, followed by physical characteristic analysis and effectiveness testing. Lotion formulation was conducted with varying proportions of essential oil and VCO. Tests conducted include antioxidant testing using the DPPH method, bacterial testing to determine antibacterial effectiveness, and organoleptic testing to evaluate the fragrance and moisturizing properties of the lotion. The research results showed that lotion formulations with specific proportions of ylang-ylang essential oil and VCO produced significant antioxidant activity, with IC50 values indicating strong antioxidant potential. In addition, bacterial tests showed that the lotion was effective in reducing bacterial colony counts, meeting microbial contamination standards according to SNI. Organoleptic test results showed a positive preference from panelists for the fragrance and moisturizing properties of the lotion, with some samples receiving excellent ratings.Key words: Essential Oil, Ylang-Ylang Flower, Virgin Coconut Oil (VCO), Hand Body Lotion, Antioxidant, Antibacterial, and Organoleptic Testing.
ANALYSIS OF COAGULANT NEEDS AND OPERATIONAL COSTS IN THE WATER PURIFICATION PROCESS ON CLARIFIER (Z-9451) IN THE UTILITY UNIT OF PT PERTA ARUN GAS LABORATORY SCALE USING THE JAR TEST METHOD Mahrizal, M; Elfiana, E; Pardi, P
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.v22i01.6146

Abstract

ABSTRACTThis study discusses the analysis of coagulant needs and operational costs in the water purification process on the clarifier (Z-9451) in the utility unit of PT Perta Arun Gas on a laboratory scale using the jar test method. This research is expected to provide benefits in improving the efficiency of chemical use, producing water quality that meets standards and estimating operational costs. This study aims to test the effectiveness of coagulants using jartest on clarifier inlet water samples at PT Perta Arun Gas. The parameters tested include pH, turbidity, and conductivity. Experiments were carried out with variations in the doses of coagulants and polymers. The results of the experiment will be used to determine the optimal dose of coagulant for raw water treatment. The best efficiency In the first week of November 7, 2023, the results of the analysis of the clarifier feed raw water (Z-9451) were obtained, namely a decrease in turbidity of 98.74%. In the second week of November 14, 2023, the decrease in turbidity was 98.42%, in the third week of November 21, 2023, the decrease in turbidity was 98.33%, and in the last week of November 28, 2023, the decrease in turbidity was 98.50%. The results showed the best efficiency in the first week with a concentration of aluminum sulfate of 24 ppm and polymer 0.20 ppm. The use of this concentration is able to produce good water quality and save the company's operational costs. However, weather conditions can affect the quality of raw water, so further research is needed to obtain the optimal conditions for the addition of aluminum sulfate and polymer. It is recommended to conduct a weekly Jartes analysis in order to provide recommendations on the use of aluminum sulfate and polymers as coagulants in utility units. Keywords : Aluminium Sulfat, Clarifier , Jartest, Koagulan, Polymer, Turbidity
THE EFFECT OF STORAGE TIME AND ORIGIN OF RAW MATERIALS ON CPO QUALITY IN FFA, LAUNDRY AND MOIST PARAMETERS IN PKS INTI GUNA NABATI Munandar, Iqbal Haris; Fachraniah, F; Sariadi, S
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.v22i02.6164

Abstract

ABSTRACTIndonesia is currently the largest palm oil producer in the world with a production of around 3,855,000 tons/year in 2023. This study discusses the potential and quality of palm oil based on the duration of fruit storage (1, 2, 3, 4, 5, 6 and 7 days). The research was carried out from November to December 2023, at PT Inti Guna Nabati, Sarolangun, South Sumatra. The parameters measured for oil potential are crude palm oil (CPO) content, and the quality of palm oil measured is the bleaching regression index (DOBI), free fatty acid content, and moisture content from northern FFB suppliers (Rasau B2 Pamenang Village, Merangin District) and southern FFB suppliers (Setia Marg Village, Muara Lakitan District). Free fatty acids are determined by titration, and moisture content is measured with an electronic moisture analyzer. The purpose of this study is to find out the quality of the two FFB suppliers that are good and suitable for further processing at PKS IGUN. It will be better to bring FFB 1-2 days after harvest directly to the mill because the quality still meets the criteria of the IGUN mill. The results of the study show that the quality potential of FFB is the longer it is stored, the higher the FFA level, the lower the moist, the lower the DOBI. Based on the results of the study, the length of fruit storage has a bad effect on the quality of palm oil. Based on the results of CPO research from Rasau B2 Pamenang Village, Merangin District for FFA 2.13, moist 1.00 and DOBI 1.712, while the results of CPO research from Setia Marga Village, Muara Lakitan District are FFA 2.48, moist 0.47 and DOBI 1.681. Of the two research results, the CPO results from Rasau B2 Pamenang Village, Kec are better.Keywords : palm oil, FFA, laundry, moist

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