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Elwina Elwina
Politeknik negeri lhokseumawe
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Mechanical Engineering

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Ekstraksi Pigmen Betasianin Umbi Bit Merah (Beta Vulgaris L) sebagai Pewarna Rambut Merah Alami dengan Zat Pengikat Mordan Jeruk Nipis (Citrus Aurantifolia) Tia Mauliza; Elwina Elwina; Irwan Nurdin
Jurnal Teknologi Vol 23, No 2 (2023): Oktober 2023
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v23i2.4298

Abstract

Beetroot (Beta vulgaris L) apart from being good for consumption, is also good for use as a natural food coloring and cosmetic preparation. This research aims to make hair dye cosmetics from natural ingredients with a number of benefits that can increase beauty, but do not have side effects on the health of the user or the environment, by using beetroot plants as the main ingredient for the dye, and mordant which is an important component for strengthening the bond between dyes and fibers to prevent fading using lime (Citrus aurantifolia). Extraction of beet tubers was carried out using 70% ethanol solvent using the maceration method. Maceration is carried out for 3x24hours. This research used varying volumes of beetroot 2ml, 4ml, 6ml, 8ml and 10ml, with varying volumes of lime as mordant, namely 0.5ml, 1ml, 1.5ml, 2ml and 2.5ml. The research results showed that the best hair dye with a composition of 10ml of beet root extract with a volume of 2ml and 2.5ml of lime had a pH of 6.20 and 6.12 in accordance with the scalp pH standard, namely 4-6.5 in according to SNI 06-2692-1992, test value the color stability during washing changes on average in the 4th washing, the irritation test value is negative for redness, itching and swelling, indicating that the hair dye preparation does not irritate the skin, the organoleptic test value has an average value for color, aroma and texture of 1.82 and the value of absorbed wadar content of betacyanin pigment was R(Red)123=48.24%.
Ekstraksi Kulit Jeruk Manis (Citrus Sinensis) Sebagai Bahan Aditif Pembuatan Lilin Aromaterapi Berbahan Baku Minyak Kedelai (Soy Wax) M. Riski Syahputra; Elwina Elwina; Fachraniah Fachraniah
Jurnal Teknologi Vol 26, No 1 (2026): April 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i1.8671

Abstract

This study aims to utilize sweet orange peel (Citrus sinensis) as an additive in the production of aromatherapy candles based on soy wax. Essential oil extraction was carried out using the maceration method with 96% ethanol as the solvent. The independent variables in this study included variations in the volume of orange peel extract (2–6 mL) and the mass of soy wax (100–300 g), while the dependent variables comprised pH measurement, melting point analysis, component analysis using gas chromatography–mass spectrometry (GC–MS), and organoleptic evaluation (aroma, shape, and color). The results showed that the orange peel extract yielded essential oil with a fresh citrus aroma and a pH ranging from 5.5 to 5.8. The melting point of the candles increased with increasing extract volume and soy wax mass, reaching a maximum temperature of 54°C. The best burning resistance was obtained at the combination of 250 g soy wax and 6 mL extract, with a burning duration of 4.49 hours. Hedonic testing indicated the highest aroma preference at the combinations of 100 g soy wax with 6 mL extract and 300 g soy wax with 5 mL extract, with a hedonic score of 4.93. GC–MS analysis revealed that the major components of the essential oil were D-limonene, linalool, and other alcohol compounds, which contribute to relaxation effects and a characteristic citrus aroma. Overall, the findings demonstrate that sweet orange peel extract has strong potential as a natural additive in the production of environmentally friendly and economically valuable aromatherapy candles.
Analysis of Coconut Oil Biodiesel Blends with Diesel Fuel and Citronella Oil Additive as an Alternative Fuel Khairunnissa Khairunnissa; Syafruddin Syafruddin; Elwina Elwina
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9476

Abstract

The increasing demand for diesel fuel and the environmental impact of the consumption of fossil fuels has encouraged the development of renewable alternative fuels. Coconut oil biodiesel is a promising alternative due to high cetane number, biodegradability and abundant availability but its application is limited due to relatively high viscosity. The present work aims to evaluate the effect of blending coconut oil biodiesel with diesel fuel and the addition of citronella oil (Cymbopogon nardus) as a natural bio-additive on the quality of the fuel. Citronella oil in concentration of 0 to 1.0% (v/v) was prepared in four biodiesel-diesel blends (B40, B50, B60 and B70). The fuel properties tested were density, kinematic viscosity, flash point, carbon residue, water content and cetane number according to ASTM and SNI standards . The results indicated that the fuel quality improved with increasing biodiesel content and citronella oil concentration. The cetane number and flash point increased steadily which indicated better ignition quality and improved fuel handling safety. Meanwhile, the density, viscosity, carbon residue and water content were within the permissible limits of fuel standards. The B70 blend with 1.0% citronella oil exhibited the best overall performance among all the formulations, with the maximum cetane number, flash point and satisfactory physicochemical properties. The results show that citronella oil is an efficient natural bio-additive to improve the quality of biodiesel-diesel blends from coconut oil. The proposed formulation has a good potential to be used as sustainable and environmentally friendly alternative diesel fuel supporting renewable energy utilization and energy diversification.
The Effect of New Operation Valve Arrangement on Bottom Product Conversion Efficiency in the Fractionation Unit of XYZ Company Ben Harrizki; Irwan Irwan; Elwina Elwina
Jurnal Teknologi Vol 26, No 2 (2026): Agustus 2026
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/teknologi.v26i2.9245

Abstract

The Hydrocracker Unit at XYZ company plays an important role in converting heavy hydrocarbon fractions into higher-value products. During Carbon Bed Adsorber (CBA) replacement and activation, bottom fractionator products were previously discharged entirely to the slop system, resulting in product loss and reduced process profitability. This study evaluated the implementation of the New Operation Valve Arrangement (NOVA) as an engineering modification to improve bottom product recovery during CBA activation. The study was conducted in June 2025 at the Hydrocracker Unit of XYZ company. NOVA was installed on the bottom fractionator-to-slop line to separate activation fluid from bottom product flow and maintain product transfer to the feed tank during activation. Performance was evaluated by comparing operating conditions before and after implementation using flow indicator data, process operating parameters, mass balance calculations, and product distribution analysis based on distillation temperature range. The results showed that NOVA successfully recovered 2,315.72 barrels of bottom product that had previously been discharged to the slop tank. The recovered product was returned as recycle feed and further converted through hydrocracking into higher-value products, primarily diesel and kerosene. The economic benefit reached approximately IDR 3.55 billion for each activation cycle under start-of-run conditions. In addition, the innovation reduced manual operator intervention in elevated areas and lowered occupational risk from high to low. The study confirms that NOVA is an effective and practical engineering solution for improving bottom product conversion efficiency, increasing refinery profitability, and enhancing operational safety. This innovation also shows strong potential for application in similar refinery processing units.
Co-Authors Ben Harrizki Fachraniah, Fachraniah Irwan Irwan Irwan Nurdin Khairunnissa Khairunnissa M. Riski Syahputra Syafruddin Syafruddin Tia Mauliza