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INDONESIA
Jurnal Ilmiah Teknik Kimia
Published by Universitas Pamulang
ISSN : 25490699     EISSN : 2685323X     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry
Fokus dan Lingkup Jurnal i lmiah Teknik Kimia yaitu pengolahan limbah, teknologi pangan dan material, proses pemisahan, teknik reaksi kimia, dan nanopartikel. Jurnal Ilmiah Teknik Kimia Universitas Pamulang terbit 2 kali dalam setahun yaitu pada bulan Januari dan Juli.
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Articles 131 Documents
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MODEL MATEMATIKA EKSTRAKSI COFFEE OIL DARI LIMBAH AMPAS KOPI BERDASARKAN PERBEDAAN TEMPERATUR Mega Mustikaningrum; Rara Ayu Lestary; Nita Widyastuti; Fikrah Dian Indrawati Sawali
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 1 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i1.44507

Abstract

In the past decade, coffee productivity, particularly instant coffee production, has experienced significant growth. This increase has generated more coffee grounds as a by-product, which is now widely utilized in the cosmetics and energy sectors, especially for producing coffee oil. Optimization of coffee oil isolation methods continues to be developed to improve efficiency. This study aims to obtain optimal values for the coffee oil diffusivity parameter (Da) and extraction rate constant (k). Coffee grounds extraction was performed using Hexane solvent with the aid of ultrasonic waves through a bath-type sonicator. The research was conducted with variations in temperature (30°C and 40°C) and extraction time (30, 60, 90, and 120 minutes). The research results showed that the coffee oil diffusivity values at temperatures of 30°C and 40°C were 9.93 x 10⁻¹⁰ and 9.99 x 10⁻¹⁰ dm²/s, respectively. The extraction rate constants obtained at each temperature were 0.450 and 0.667 dm/s.
PENGUJIAN UNSUR LOGAM Co, OKSIDA MgO DAN Al2O3 PADA JENIS TANAH LIMONITE DENGAN MENGGUNAKAN METODE X-RAY FLOURESCENCE (XRF) Wahab, Nurhikmah; Octavia, Rizka; Ramli, Irawati; Syaputra, Irfan
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 1 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i1.44851

Abstract

Nickel Laterite Laterite is defined as one of the various products of the chemical weathering process. This research aims to analyze the content of the metal elements cobalt (Co), magnesium oxide (MgO), and aluminum oxide (Al₂O₃) in limonite soil types using the X-Ray Fluorescence (XRF) method. Limonite soil was chosen because it is rich in iron minerals and its potential to contain valuable element.The test results show variations in the concentrations of Co,MgO,and Al₂O₃ in the various limonite soil samples analyzed, namely an average of 0.07% cobalt (Co),an average of 5.18% of Magnesium Oxide, and an average of Aluminum Oxide of 7.34%. Differences in element levels are influenced by mineralogical composition, geological origin, and environmental conditions in the sampling area.This research makes an important contribution to understanding the distribution of important elements in limonite soils,which can be the basis for more effective management of mineral resources in the future
Penilaian Risiko Kesehatan Bahan Kimia pada Industri Pembuatan Alat Musik PT. XYZ Tahun 2024 Febriana Maizura; Tejamaya, Mila
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 1 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i1.44970

Abstract

The musical instrument manufacturing industry is an industry that has risks and dangers from using chemicals. The chemicals used include solvents and adhesives. Solvents are used as mixing and diluting materials for the wood painting process. Adhesives are used when connecting wooden parts to make a musical instrument. The solvents used are 1,2,4-trimethylbenzene, 2-butoxyethanol, 2-ethoxyethyl acetate, 4-methylpentan-2-one, cumene, cyclohexanone, ethyl acetate, ethyl benzene, mesitylene, naphthalene, n-butyl acetate, solvent naphtha (petroleum), toluene, and xylene. The assessment of chemical health risks refers to the Chemical Health Risk Assessment (CHRA) DOSH Malaysia in 2018. This study is qualitative because the determination of the level of hazard, exposure, and evaluation are carried out qualitatively. Data collection begins with chemical identification, then conducting observations and interviews, followed by health risk assessment, adequacy of control, and determination of action priorities for each inhalation and dermal exposure. The results of the study at PT. XYZ for inhalation exposure obtained a Risk Rating value of 6 (moderate) to 16 (high), while for dermal exposure the value was moderate 1, moderate 2, and high 1. The coloring process with paint has an action priority of 3 while the washcoat, wapping, and logo installation processes have an action priority of 2 which requires improvement of existing risk control.
Pengaruh Waktu Reaksi dan Laju Alir Oksigen Pada Proses Delignifikasi Tandan Kosong Kelapa Sawit Miftahul Jannah, Asyeni; Fitria, Syarifah; Muharomah, Riani; Putri Andini, Handalia; Bonawati, Annisa
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 1 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i1.45925

Abstract

Oil palm empty fruit bunches have a high lignocellulose content. Lignocellulose consists of hemicellulose, cellulose, and lignin. Lignin is the binder of cells in biomass. The structure of lignin is very complex and difficult to break down. The presence of lignin will hinder the processing of OPEFB and need to do delignification. One effective way to reduce lignin content is by ozonolysis. In this study, the effect of reaction time and oxygen flow rate on the OPEFB was studied. The reaction times in this process were 5, 10, and 15 min, and oxygen flowrates were 1, 2, 3 L/min. Lignin content was analyzed using the Kappa method. The least lignin content was obtained in the sample with 2 L/min flow rate for 5 min, which was 11.01% with a cellulose content was 64.72% and hemicellulose was 15.16%.
Optimization of Natural Dye Extraction from Avocado Skin (Percea Americana Mill) Using the Taguchi Method Amborowati, Cindi; Hidayat, Arif; Retno Sawitri, Dyah
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 1 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i1.46230

Abstract

Natural dyes were created to replace the use of artificial dyes. One plant that can be used as a natural dye is avocado skin (Percea Americana Mill). Avocado skin can be extracted using Ultrasonic Assisted Extraction (UAE) to obtain tannins as color pigments. The aim of this research is to optimize process conditions and evaluate the influence of the interaction of factors that influence the extraction process of natural dyes from avocado skin using the Taguchi method. The research method begins with cleaning, drying and reducing the size of the avocado skin as desired. Then the avocado skin is extracted using the UAE method with varying ultrasonic power, extraction time, and the ratio of ingredients and solvents. Then it is evaporated using a rotary evaporator to evaporate the remaining solvent. The resulting extract was then analyzed for total tannins to optimize the extraction process using the Taguchi method. From the experimental results, the optimum yield was obtained at an ultrasonic power of 75%, a material and solvent ratio of 1:04, and an extraction time of 60 minutes. The optimum tannin concentration was obtained at a material and solvent ratio of 1:12, extraction time of 35 minutes, and ultrasonic power of 25%.
Adsorpsi Kromium Heksavalen Menggunakan Nanokomposit ZnO/Kitosan dari Limbah Baterai Zn-C dan Kulit Udang Garminingsih; Sunardi
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 2 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i2.48435

Abstract

Zn-C batteries contain zinc, carbon, manganese dioxide, and ammonium chloride, which are difficult to decompose and pose risks to human health and the environment. Recycling Zn-C battery waste into zinc oxide (ZnO) offers a sustainable solution. When combined with chitosan, ZnO forms a composite material. This study analyzes the characteristics of ZnO/chitosan nanocomposites and determines optimal conditions for hexavalent chromium adsorption. The nanocomposite was synthesized by mixing ZnO from battery waste with chitosan from shrimp shells. FTIR analysis of chitosan showed characteristic peaks at 3.498 cm⁻¹, 2.875 cm⁻¹, 1.373 cm⁻¹, 1.613 cm⁻¹, 1.302 cm⁻¹, 1.554 cm⁻¹, 1.153 cm⁻¹, and 1.067 cm⁻¹, while ZnO had a peak at 502 cm⁻¹. XRD analysis identified 2θ peaks at 9.22º, 19.13º, 23.04º, 26.23º, 31.62º, 34.39º, 36.17º, and 56.54º. Optimal adsorption occurred with 20 mg nanocomposite, 60 minutes contact time, and 5 ppm chromium concentration, achieving 94.61% efficiency.
Optimasi Pemodelan Skema Proses pada Kolom Deetanizer Unit Kilang LPG Menggunakan Aspen Hysys Annasit; Kubela, Samessyela Kasih Putra; Setiyono, Agus
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 2 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i2.48446

Abstract

LPG plant optimization modeling is important to improve overall plant performance. This can be done in various ways, such as increasing efficiency, productivity, and reducing costs. This research aims to obtain the optimum operating design scheme parameters to obtain the best LPG plant unit performance in terms of purity, product yield, energy consumption, and operational economics. Efficiency can be increased by improving production processes and reducing energy consumption. Productivity can be increased by increasing production capacity. In this research, the analysis method used involves a comparison between the LPG Plant unit design before and after optimization with field operational data, as well as data from literature studies. The factors that influence this difference include the value of equipment prices, the number of equipment, excessive utility consumption, and total sales of LPG production. Based on economic calculations, Scheme 1 has a Total Capital Investment (TCI) of $ 3,317,566.18, annual costs of $ 219,008.7346, and income of $ 125,666,446 (compared to scheme 2, which is $ 131,909,910.33), and LPG processing costs of $0.0199 per kg. By looking at the comparison of the performance and economic value of the two schemes, it can be concluded that scheme 1 is a superior concept for LPG production units because it has been considered from various aspects.
Analisis Kelayakan Pabrik Sparkling Wine Nanas dengan Metode Charmat Berkapasitas 100.000 L/Tahun Farand, Rafael; Sugih, Asaf; Kumalaputri, Angela
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 2 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i2.48504

Abstract

Indonesia is the largest pineapple producer globally, with production reaching 3.18 million metric tons. While most exports are processed products like canned pineapples, jam, and juice, pineapple sparkling wine offers a high-value alternative that aligns with the growing domestic and international wine markets. This study evaluates the feasibility of establishing a pineapple sparkling wine factory using the Charmat method, with a capacity of 100,000 L/year, in Buleleng, Bali. The research involves literature review, process flow diagram development, mass balance calculations, equipment design and costing, and comprehensive economic and feasibility analyses. Key economic parameters include Net Present Value (NPV), Internal Rate of Return (IRR), Return on Investment (ROI), Payback Period (PBP), and Break Even Point (BEP). Results show an NPV of Rp 99,3 milliar, IRR of 28,67%, average of ROI of 47,34% ,and  PBP of 4 years and 6 months. These findings demonstrate the project's economic viability and highlight its potential to contribute to the diversification of Indonesia's pineapple-based product industry. This study serves as a basis for further development and investment in pineapple sparkling wine production in Indonesia.
Sintesis dan Karakterisasi β-Tricalcium Phosphate dari Cangkang Kerang Hijau dengan Metode Hidrotermal Alifia, Camilla; Az-Zahra, Kamila; Kurniati, Ely
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 2 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i2.48664

Abstract

Green mussel shells contain high calcium oxide for the manufacture of β-Tricalcium Phosphate (β-TCP). β-TCP is used in bone, cement, and tooth repair. The synthesis of β-Tricalcium Phosphate is carried out by reacting calcium hydroxide solution with phosphoric acid using the hydrothermal method to produce materials with high crystallinity. In this study, the effect of sintering temperature and synthesis pH on β-TCP products was analyzed with variations in sintering temperature (℃) 780, 810, 840, 870, 900 and synthesis pH 6, 7, 8, 9, 10. The β-TCP product was analyzed by XRD (X-ray diffractometer) to determine the crystallinity of β-TCP. The research results obtained the highest yield value at a sintering temperature of 840°C with a synthesis pH of 8, which was 59.37% and the highest crystallinity was at a sintering temperature of 900°C with a synthesis pH of 8, which was 95.78%.
Pemanfaatan Limbah Ampas Kopi sebagai Adsorben untuk Pengolahan Air Limbah Industri Tahu: Analisis Adsorpsi Batch dan Parameter Isoterm Rara Ayu Lestary; Oki Alfernando; Sarah Fiebrina Heraningsih; Rosmawati Sipayung; Adelia Amanda; Alya Rizki Amelia; Ita Safitri; Septrinawati Tambunan; Tiamsa Sihotang; Karisma Ulfadeli; Tiara Bartisa Putri
Jurnal Ilmiah Teknik Kimia Vol. 9 No. 2 (2025): JURNAL ILMIAH TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pamulang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32493/jitk.v9i2.48776

Abstract

Coffee grounds waste can be utilized as a cost-effective and eco-friendly adsorbent for treating wastewater from the tofu industry. Batch adsorption experiments were conducted to evaluate the performance of coffee grounds as an adsorbent in removing pollutants from tofu wastewater. Different adsorbent doses (1 g, 2 g, and 3 g per 200 mL) were tested, and the quality of the wastewater was assessed based on changes in Total Dissolved Solids (TDS), turbidity, conductivity, and pH. The specific adsorption capacity (mg/g) and removal efficiency (%) decreased with increasing adsorbent dose. The overall removal of contaminants was most effective at a 3 g dose, resulting in a 47% reduction in TDS and an 80% decrease in turbidity. Adsorption equilibrium data were further analyzed using Langmuir, Freundlich, and Temkin isotherm models. The Langmuir model showed the best fit (R² = 0.999), indicating monolayer adsorption on a homogeneous surface. These results demonstrate that coffee grounds waste is a promising sustainable adsorbent, particularly for small and medium-scale tofu industries with limited resources for wastewater treatment.

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