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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.
Arjuna Subject : -
Articles 131 Documents
 9   10   11   12   13 
Kinetika Perubahan Warna Minuman Teh Hijau Sebagai Pengaruh Intensitas Cahaya dan Penambahan Natrium Askorbat Permadi, Handika; Feri Kusnandar; Dias Indrasti
Jurnal Ilmiah Teknik Kimia Vol. 8 No. 1 (2024): 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.v8i1.37963

Abstract

Displaying ready-to-drink tea beverages in well-lit modern markets accelerates color changes in the product due to oxidation reactions. The addition of antioxidants (sodium ascorbate), combined with light control, potentially inhibits color changes during storage. This study aims to evaluate the kinetics of color changes varying light intensities (500, 1000, and 1500 lux) during a 56-day storage period at 25°C, both with and without the addition of sodium ascorbate (200 ppm) during the extraction process. The stored green tea beverages were analyzed for pH levels, brightness levels (L*), °Hue, and sensory. Storing the beverages in well-lit conditions decreases the pH and reduction in brightness level (L*) and °Hue. The reaction rate of pH, L*, °Hue, and ranking test reduction in green tea beverages without the addition of sodium ascorbate at light intensities of 500, 1000, and 1500 lux is higher compared to treatments with sodium ascorbate addition. Color changes in tea beverages stored different light intensities significant correlation between the L*, °Hue, pH, and perceived color. The longer the product remained in well-lit conditions, the more its brightness diminished, displaying an increasingly yellowish-red hue. The addition of sodium ascorbate effectively inhibited color changes for 7 days of storage. Effectiveness diminished over time, dropping from 197.3 ppm at the start to being undetectable by the end of the storage period. Treatment with sodium ascorbate led to a brighter final color and a less pronounced decrease in pH compared to treatments without sodium ascorbate.
Penilaian Risiko Kesehatan Kerja Akibat Pajanan Bahan Kimia Pada Laboratorium PT X Mulyadi, Irwan; Tejamaya, Mila
Jurnal Ilmiah Teknik Kimia Vol. 8 No. 2 (2024): 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.v8i2.27650

Abstract

Laboratory workers have potential health and safety risks, health risks in laboratories are potential health and safety risks, and health risks in laboratories are related to exposure to hazardous chemicals. Chemicals often used in laboratory testing are organic solvents such as benzene, toluene, and xylene which have risks to workers' health. Chemical health risk assessments are important for assessing the potential health and safety hazards of workers using the approach cross-sectional which refers to the method Chemical Health Risk Assessment DOSH, Malaysia. Data collection was carried out qualitatively starting with identifying dangerous chemicals, then observing the use of chemicals, followed by assessing the level of health risks, and determining the adequacy of control action priority for inhalation and dermal exposures respectively. The research results at the PT show that the risk level for inhalation exposure is 12 (moderate risk) and the risk level for dermal exposure is 2 (moderate), but still requires improvement in existing risk controls.
Analisis Gugus Fungsi dan Sifat Termal Limbah Jaring Ikan Untuk Produk Otomotif Aryanti, Fitria Ika; Silvia, Silvia; Santoso, Teguh Budi; Romaro, Alana Lovin
Jurnal Ilmiah Teknik Kimia Vol. 8 No. 2 (2024): 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.v8i2.37885

Abstract

Plastic has been used in daily life due to its durability. Fishing net waste is a type of plastic waste that is dangerous. Fishing net waste can also damage marine biota, such as coral reefs and marine animals. One type of polyamide that is widely used is nylon. Fishing net waste containing nylon has the potential to be recycled. In this research, fishing net waste is used for automotive product applications using a twin-screw extruder. There are five variations: pure polyamide (PA), recycled polyamide (rPA), PA-rPA 50:50, PA-rPA 75:25, and PA-rPA 25:75. To be able to determine the characteristics of the mixed product, several tests were carried out, including testing the thermal properties of the final product with DSC and FTIR testing to identify functional groups. Based on the research results, it was found that all variations contained polyamide polymers, which were characterized by a melting temperature of 218.8–224.4 °C and obtained carbonyl functional groups (C=O) and secondary amine functional groups (N–H) in the FTIR test results, which indicated the presence of amide bonds in the samples.
Pengurangan Kandungan Total Dissolved Solid (TDS), Konduktivitas dan Natural Organic Matter (NOM) pada Air Baku Bendungan Jatiluhur Menggunakan Kombinasi Membran dan Ion Exchange Suhartono, Jono; Salsabilla, Anastasya; Rosalina, Dewi
Jurnal Ilmiah Teknik Kimia Vol. 8 No. 2 (2024): 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.v8i2.38730

Abstract

The escalating demand for high-quality water in industrial applications has prompted the adoption of demineralization processes as an effective solution to eliminate disruptive minerals and ions. Water, vital for process and cooling needs, must meet strict standards to avoid issues like corrosion and heavy metal pollution. Contaminants pose risks, necessitating careful attention. This study assesses demineral water requirements based on Total Dissolved Solids (TDS), conductivity, and Natural Organic Matter (NOM). Examining membrane and ion exchange technologies, including Reverse Osmosis (RO), Ultrafiltration (UF), and ion exchange resins independently and in combination, the study also explores the impact of flow rate on TDS, conductivity, and NOM. Additionally, it investigates the effect of flow rate on sampling locations at the Jatiluhur Dam. Research results highlight the effectiveness of a combined RO and resin approach, achieving an 89% reduction in TDS, 88% in conductivity, and complete NOM removal.
Sintesa dan Karakteristik Karbon Aktif dari Batang Pisang Kepok (Musa acuminata) Sebagai Adsorben pada Penjernihan Minyak Goreng Bekas Primastiyaningayu, Andini; Rismala, Erika Indri; Triana, Nurul Widji
Jurnal Ilmiah Teknik Kimia Vol. 8 No. 2 (2024): 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.v8i2.40221

Abstract

Kepok banana stems have a cellulose content of 58.6466%. The cellulose content means that Kepok banana stems can be used as a basic ingredient for making active carbon. Activated carbon is a material that has high porosity and can be used for absorption which can remove impurities liquid or gas. Process for making activated carbon is cutting banana stems into small pieces and washed, then drying with sun during 7 days. After that, carbonized at 300℃ for 1 hour. Carbonizasition product were ground and sieved with a 100 mesh sieve and activated with NaOH 0.5; 0.75; 1; 1.25 and 1.5 N for 12; 18; 24; 30; and 36 hours. Then, drying in oven at temperature of 100℃ until constant weight. The best activated carbon is activator concentration of 1.5 N NaOH for 12 hours with a water content of 7.8496%, ash content of 9.7186%, and bound carbon content of 65.3479%. SEM test results of activated carbon from banana stems before application have a porous morphological structure and after application the active carbon pores are seen to be closed. Percentage reduction FFA reach 94.8057% and the reduction peroxide reach 86.8978%.
Pembuatan Arang Aktif Nanopartikel Kulit Nangka Menggunakan High Energy Milling dengan Aktivator H3PO4 Safitri, Annisa Nur; Faris Al Ghifary, Muhammad; Widji Triana, Nurul; Nurma Wahyusi , Kindriari
Jurnal Ilmiah Teknik Kimia Vol. 8 No. 2 (2024): 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.v8i2.40834

Abstract

Activated charcoal is a compound formed from the arrangement of C atoms with a porous internal structure so that it has adsorption properties. One of the materials that can be used to make activated charcoal is jackfruit peel which contains cellulose (52.739%), lignin (10.599%), and hemicellulose (16.913%). Grind it to size of 100 mesh and put it in milling nanoparticles using tools HEM at a speed of 1200 rpm for 2 hours. Next, the activation process was carried out with phosphoric acid compounds and variables of 1 hour, 6 hours, 12 hours, 18 hours, 24 hours and concentrations of 5%, 10%, 15%, 20%, 25%. Samples in powder form were characterized by size, SEM, ash content and water content. Size test results with method Particle Size Analyzer (PSA) was found to be 1.22 nm. SEM test results show that jackfruit peel activated charcoal is composed of particles of diverse size, irregular shape and porous. EDX results showed that the chemical components of activated charcoal were C (57.08%), O (33.30%), Mg (1.33%), Si 1.57%, K 5.73%. Analysis of water content and ash content is the smallest, namely 0.18% and 0.2%.
Pembuatan Kertas Seni Dari Kombinasi Limbah Serbuk Kayu Sengon Dan Ampas Tebu Dengan Sizing Agent Carboxy Methyl Cellulose (CMC) Menggunakan Metode Soda Pulping Sutanti, Sri; Oktaviananda, Cyrilla; Tri Utami Handhayani, Endah; Selin Orxellina, Elsa
Jurnal Ilmiah Teknik Kimia Vol. 8 No. 2 (2024): 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.v8i2.41252

Abstract

Penelitian pembuatan kertas seni dari limbah serbuk kayu sengon dan ampas tebu ini bertujuan untuk mengetahui pengaruh rasio serbuk kayu sengon dengan ampas tebu (100%:0%; 75%;25%; 50%;50%; 25%:75%; 0%:100%) terhadap karakteristik kertas seni yang dihasilkan. Penelitian dilakukan secara eksperimen menggunakan RAL faktorial dan 3 kali ulangan serta analisis secara deskriptif. Penelitian ini menggunakan basis bahan baku 25g dengan tahapan proses: 1) Size reduction dan screening serbuk kayu sengon dan ampas tebu menjadi ukuran 80 mesh, analisis kadar air dan kadar serat, serta membuat larutan NaOH 6%; 2) Pulping dengan larutan NaOH 6% sebanyak 1 : 20 (v/b), dalam autoclave pada suhu 120oC selama 1 jam; 3) Refinning dan pengeringan pulp; 4) Bleaching pulp dengan H2O2 sebanyak 5% pada suhu 60oC selama 1 jam; 5) Refinning (pencucian) pulp; 6) Blending pulp dengan air (1 : 8), sizing agent CMC (40%), dan plasticizer gliserol (40%) pada suhu 60 – 70oC selama 30 menit; 7) Mencetak kertas; 8) Pengeringan kertas. Kertas dianalisis gramatur, ketebalan kertas, kekuatan tarik, morfologi, dan warna. Hasil penelitian menunjukkan bahwa kombinasi ampas tebu terhadap serbuk kayu sengon dapat menurunkan gramatur 18,72% - 49,05%, ketebalan kertas 2,64% - 9,62%, tetapi menaikkan ketahanan tarik 66,78% - 70,44%, dan warna kertas lebih cerah.
Pembuatan Tepung Biji Mangga (Mangifera indica L.) dengan Metode Blanching dan Penambahan Asam Askorbat Tungga Hayu Nirmala, Cipta; Safira Cecilia Z; Widji Triana, Nurul; Suprihatin
Jurnal Ilmiah Teknik Kimia Vol. 8 No. 2 (2024): 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.v8i2.41438

Abstract

Biji mangga memiliki kandungan protein (7,5 – 13%), karbohidrat (69,2 - 80%), kalsium (0,21%), abu (2,2 –2,6%), fosfor (0,22%) dan serat (2,0 – 4,6%). Oleh karena itu, biji mangga dapat diolah menjadi bahan pangan yang potensial. Tujuan penelitian yaitu membuat tepung biji mangga, mengetahui pengaruh waktu blanching serta konsentrasi asam askorbat terhadap kandungan karbohidrat, lemak, protein, kadar air dan sensori tepung biji mangga. Pembuatan tepung biji mangga melalui tahapan diantaranya pengupasan kulit, pencucian biji, pemotongan tebal 0,5 cm, penimbangan, blanching 85℃ selama (0; 2,5; 5; 7,5; 10) menit, perendaman 30 menit dengan Na-metabisulfit 0,2%, perendaman dengan 20 menit dengan asam askorbat (0; 0,5; 1; 1,5; 2)%, pengeringan (80℃, 4 jam), penghalusan, pengayakan 80 mesh. Hasil penelitian menunjukkan semakin lama waktu blanching, kadar karbohidrat, protein dan air tepung biji mangga semakin meningkat, sedangkan kadar lemak semakin menurun. Konsentrasi asam askorbat semakin tinggi juga meningkatkan kadar karbohidrat, dan protein tepung, namun menurunkan kadar air dan lemaknya. Perlakuan blanching dan perendaman asam askorbat pada biji mangga berpengaruh nyata terhadap warna tepung (p<0,05), namun berpengaruh tidak nyata pada aroma dan tekstur tepung (p>0,05). Mango seeds contais protein (7.5 - 13%), carbohydrate (69.2 - 80%), calcium (0.21%), ash (2.2 -2.6%), phosphorus (0.22%) and fiber (2.0 - 4.6%). Mango seeds can be processed into potential food. The objectives of the study were to make mango seed flour, determine the effect of blanching time and ascorbic acid concentration on the content of carbohydrates, fat, protein, water content, and sensory of mango seed flour. Steps to make mango seed flour including peeling and washing the seeds, cutting 0.5 cm thick, weighing, blanching at 85℃ for (0; 2.5; 5; 7.5; 10) minutes, 30 minutes soaking with Na-metabisulfite 0.2%, immersion with 20 min with ascorbic acid (0; 0.5; 1; 1.5; 2)%, drying (80℃, 4 hours), pulverization, 80 mesh sieving. Research result showed that the longer the blanching time, carbohydrate, protein and water content of mango seed flour increases, while the fat content decreases. The higher ascorbic acid concentration also increased the carbohydrate and protein content of flour, but decreased the water and fat content. Blanching treatment and ascorbic acid soaking treatment on mango seeds had a significant effect (p<0,05) on the color of the flour, but did not significantly affect the aroma and texture of flour(p>0,05).
Optimasi Kinerja Steam Turbine Generator 4 Pada Power Plant 2 Utilities dengan Menaikkan Inlet Steam Flow (Studi Kasus PT. X) I Ketut Warsa; Sahrul Rhomadan; Megawati, Eka
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.v9i1.42520

Abstract

Electrical energy has an important role for home needs such as washing machines and irons, as well as for the industrial sector such as power plants and other infrastructure. To create electrical energy, a system is needed which is known as a power plant.. At PT. X electrical energy is produced from the Power Plant which contains supporting equipment, one of which is the Steam Turbine Generator. A Steam Turbine generator is a machine that produces electrical energy from the use of hot steam converted into mechanical energy which is connected by the turbine shaft to the generator. In the refinery operation process, it is very important to know the optimal performance of the Steam Turbine Generator. The research aims to obtain the optimization value of Steam Flow Steam Turbine Generator 4 at Power Plant 2 and to analyze the resulting performance optimization comparison. Optimizing the performance of Steam Turbine Generator 4 Power Plant 2 was carried out by increasing the Steam Flow by 5 Ton/day from 23.80 Ton/day to 63.80 Ton/day. Optimal performance on Steam Turbine Generator 4 Power Plant 2 is obtained at a Steam Flow of 63.80 Tons/day with an electrical power of 12.6 MW which will produce an efficiency value of 80.76%.
Optimasi Fermentasi Anaerob pada Produksi Biogas dari Eceng Gondok dan Kotoran Sapi dengan Response Surface Methodology Aziz, Ahmad Musonnifin
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.v9i1.44185

Abstract

Biogas is a natural gas produced by anaerobic bacteria from processing organic matter and used in energy production. The use of biogas is a green technology that is beneficial to the environment. Biogas technology facilitates the use of animal and plant waste such as cow dung and water hyacinth plants. This study aims to optimize biogas production to achieve optimal biogas volume. Anaerobic Fermentation produces biogas for 21 days. Response Surface Methodology (RSM) with a Central Composite Design (CCD) matrix is ​​used for this optimization. To find the ideal location, the biogas volume data is entered into Minitab. The error value from the optimization results is then computed to verify this optimum location. The optimized biogas produces a volume of 344 mL with an error value of 1.74% at a composition of 0.6089 kg of water hyacinth and 0.6860 kg of cow dung.

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