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Jurnal Inovasi Teknik Kimia
Published by Universitas Wahid Hasyim Semarang
ISSN : 2527614X     EISSN : 25415891     DOI : http://dx.doi.org/10.31942/inteka
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering
The Inovasi Teknik Kimia (INTEKA) journal focuses upon aspects of chemical engineering: chemical reaction engineering, environmental chemical engineering, material and food engineering . The INTEKA is an research journal and invites contributions of original and novel fundamental research. The journal aims to provide a forum for the presentation of original fundamental research, interpretative reviews and discussion of new developments in chemical engineering. Papers which describe novel theory and its application to practice are welcome, as are those which illustrate the transfer of techniques from other disciplines. Reports of carefully executed experimental work, which is soundly interpreted are also welcome. The overall focus is on original and rigorous research results which have generic significance.
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 308 Documents
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Analisis Profil Asam Lemak Minyak Zaitun (Olea Europaea L.) Menggunakan Metode GC-MS dan FT-IR Nur Aeni; Andi Eka Kartika
Jurnal Inovasi Teknik Kimia Vol. 11 No. 2 (2026): APRIL | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v11i2.15307

Abstract

Olive oil (Olea europaea L.) is a high-value vegetable oil rich in unsaturated fatty acids and bioactive compounds beneficial to health. However, variability in quality and the risk of adulteration require accurate chemical characterization. This study aims to analyze the fatty acid profile and chemical characteristics of olive oil using a combination of Gas Chromatography–Mass Spectrometry (GC–MS) and Fourier Transform Infrared Spectroscopy (FT–IR). Olive oil samples were analyzed before and after 12 hours of ultrasonic treatment, preceded by a methylation process to form fatty acid methyl esters. GC–MS was used to identify fatty acid components based on retention time and mass spectra, while FT–IR was employed to observe the main functional groups of triglycerides. The GC–MS results showed oleic acid as the dominant component, increasing from 58.36% before to 68.59% after ultrasonic treatment, followed by palmitic and linoleic acids. FT–IR spectra exhibited characteristic peaks at ~2924 cm⁻¹, 1745 cm⁻¹, and 1163 cm⁻¹, confirming the triglyceride structure. The combination of GC–MS and FT–IR proved effective for evaluating the quality and authenticity of olive oil.
The Impact of Carbon Support Catalyst from Lignin-Derived Phenolic in Ozonation Process Budi Satria Panandita; Lalak Tarbiyatun Nasyin Maleiva
Jurnal Inovasi Teknik Kimia Vol. 11 No. 2 (2026): APRIL | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v11i2.15334

Abstract

The research described herein evaluated the effectiveness of a carbon-supported catalyst synthesized from lignin-derived phenol for ozonation, using methylene blue (MB) as a representative wastewater pollutant. The effectiveness of the degradation process was evaluated through kinetics. Furthermore, the effect of temperature on MB oxidation was investigated. The N2-sorption analysis confirmed a specific surface area of the carbon support of 36.16 m²/g, with a corresponding average pore radius of 1.58 nm. Fe-loaded carbon support achieves MB decolorization over 90% within 30 minutes. Pseudo-first-order and non-linear kinetic models described the catalyst's performance. The decolorization process was thermodynamically demonstrated to be endothermic and non-spontaneous.  
Analisa Kinerja Stripper Dalam Penurunan Kandungan Ammonia Dalam Limbah Cair Pada Pengolahan Air Limbah Industri Petrokimia Dengan Simulasi ASPEN HYSYS Muhammad Ihsan Riady; Bazlina Dawami Afrah; Andyka Raihan Rahmanda; Intan Puspita Akhlaqul Qorimah; Muhammad Risky Anugrah; Rizqi Akbar Shean
Jurnal Inovasi Teknik Kimia Vol. 11 No. 2 (2026): APRIL | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v11i2.15221

Abstract

Air limbah yang dihasilkan dari industri petrokimia berupa pupuk tersebut masih mengandung banyak kadar ammonia sehingga perlu dihilangkan terlebih dahulu sebelum di buang ke lingkungan. Baku mutu kadar ammonia dalam air limbah adalah 300 ppm. Ammonia Stripper pada IPAL berperan untuk melucuti ammonia dalam air limbah perlu di evaluasi untuk mengetahui kelayakan alat tersebut dan mengetahui pengaruh flowrate terhadap kinerja stripper. Hasil evaluasi menggunakan software ASPEN HYSYS menunjukkan bahwa kadar ammonia yang berhasil dilucuti dari air limbah sedikit lebih tinggi untuk data desain sekitar 296 ppm dibandingkan dengan data desain yaitu 2,7 ppm. Bila ditinjau dari kadar pH air limbah yang telah di proses ammonia stripper menunjukkan masih diatas baku mutu (7-8,5) yaitu 8,9-9,0. Efisiensi alat ammonia stripper berbanding lurus dengan flowrate steam per flowrate air limbah, Perbandingan antara flowrate steam dengan air limbah agar tetap berada di standar baku mutu adalah 0,385 m3 /ton. Data aktual yang lebih tinggi dibandingkan data desain menunjukkan bahwa Ammonia Stripper pada IPAL perlu dilakukan perawatan atau perbaikan agar kinerjanya data lebih mendekati data desain, namun alat tersebut masih dapat dikatakan layak untuk digunakan karena masih berada di dalam baku mutu, yaitu 296 ppm.
Sintesis Tembaga (II) Sulfat Pentahidrat (CuSO₄.5H₂O) Dari Limbah Kabel Tembaga (Cu) Dengan Proses Kristalisasi Dingin Febby Vania; Pujangga Tirta Kusuma; Ni Ketut Sari
Jurnal Inovasi Teknik Kimia Vol. 11 No. 2 (2026): APRIL | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v11i2.15456

Abstract

Copper cable waste is a type of electronic waste with high copper content and potential for reuse as a raw material for value-added products. This study synthesized copper(II) sulfate pentahydrate (CuSO₄·5H₂O) from copper cable waste through cold crystallization and determined the optimum process conditions. Copper was dissolved in 65% nitric acid (HNO₃) to form Cu²⁺ ions, followed by the addition of sulfuric acid (H₂SO₄) at concentrations of 16–24% and heating until saturation. Crystallization was conducted at 8–24°C for 48 h. The crystals were separated, dried, and analyzed using XRF, XRD, and hydration analysis. The highest yield, 89.43%, was obtained at 22% H₂SO₄ and 8°C. XRD confirmed the dominant triclinic CuSO₄·5H₂O phase, while hydration analysis showed a CuSO₄:H₂O molar ratio of 1:5. Response Surface Methodology with CCD showed strong model fitness, with R² values of 0.997 for yield and 0.9959 for Cu content.
Aktivitas Antibakteri Ekstrak Etanol Buah Sawo Manila (Manilkara zapota) Muda Terhadap Salmonella typhimurium Berdasarkan Variasi Metode Ekstraksi Maulita Cut Nuria; Helmi Uci Rachmadhany
Jurnal Inovasi Teknik Kimia Vol. 11 No. 2 (2026): APRIL | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v11i2.15554

Abstract

Manila sapodilla unripe fruit extracts contain terpenoids, flavonoids, and tannins. The compound's retraction can be influenced by the extraction method, whether hot or cold. The chemical compound content of the extract plays a role in its biological activity, such as antibacterial activity. Salmonella typhimurium bacteria can cause problems in the digestive tract, causing typhoid fever (typhoid). The aim of this study was to determine the antibacterial activity of the ethanol extract of unripe Manila sapodilla fruit against Salmonella typhimurium using several extraction methods. Manila sapodilla unripe fruit simplicia powder was extracted using four methods: maceration, percolation, Soxhlet, and reflux, with 70% ethanol as the solvent. The concentration series of the tested extracts was 20%, 25%, 30%, and 35%. As a negative control, Dimethyl Sulfoxide (DMSO) solvent was used, and a positive control was chloramphenicol at 30 µg/disk. Antibacterial activity test using the disc diffusion method. The observed parameters, namely the zone of inhibition, were analyzed statistically using Friedman's test at the 95% confidence level. The results showed that the ethanol extract of unripe manila sapodilla fruit from several extraction methods produced zones of inhibition: maceration ranged from 6.15-7.30 mm, percolation ranged from 6.46-8.18 mm, Soxhlet ranged from 6.03-8.50 mm, and reflux ranged from 7.26-8.27 mm. Statistical results showed a significant difference in zone of inhibition values from ethanol extracts of unripe manila sapodilla fruit across all extraction methods against Salmonella typhimurium. The reflux method yields the best zone-of-inhibition results because heat makes the compound easier to extract and prevents solvent saturation.
Integration Of CaO/K₂O Heterogeneous Catalysts with Response Surface Methodology for Efficient Biodiesel Production From Waste Cooking Oil Agung Prabowo; Syarifudin Oko; Muh Irwan; Gading Bagus Mahardika; Heni Sugesti
Jurnal Inovasi Teknik Kimia Vol. 11 No. 2 (2026): APRIL | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v11i2.15449

Abstract

Waste cooking oil (WCO) is a promising low-cost feedstock for biodiesel production; however, its high impurity content and variable composition often limit conversion efficiency, particularly in single-step heterogeneous catalysis. This study addresses this challenge by developing a CaO/K₂O heterogeneous catalyst derived from waste chicken eggshells and optimizing the transesterification process using Response Surface Methodology (RSM). Unlike previous studies primarily focused on yield enhancement, this work integrates statistical optimization with GC–MS-based analysis to elucidate catalyst-dependent selectivity in fatty acid methyl ester (FAME) distribution. The results show that reaction time is the dominant factor influencing biodiesel yield, while catalyst loading has a comparatively minor effect within the investigated range. Under optimal conditions (4.5 g catalyst, 4.5 h), a biodiesel yield of 69.6% was achieved, which is moderate compared to reported values (>85%) but acceptable considering the use of untreated WCO and a low-cost waste-derived catalyst. Fuel properties generally met international standards, although the acid value slightly exceeded the limit due to residual free fatty acids. This study highlights the trade-off between process simplicity and conversion efficiency and provides new insights into structure–activity–selectivity relationships in CaO/K₂O-based systems, offering a practical pathway for sustainable biodiesel production from low-quality feedstocks.
Optimasi Proses Heat Moisture Treatment Menggunakan Response Surface Methodology dan Evaluasi Karakteristik Fisikokimia serta Potensi Prebiotik Tepung Biji Teratai (Nymphaea pubescens) sebagai Pangan Fungsional Farikha Maharani; Laeli Kurniasari; Indah Hartati
Jurnal Inovasi Teknik Kimia Vol. 9 No. 1 (2024)
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v9i1.16393

Abstract

Pangan fungsional merupakan salah satu jenis pangan yang memiliki kelebihan dibandingkan dengan pangan biasa, karena pangan fungsional memiliki manfaat bagi kesehatan. Salah satu bahan alam yang dapat digunakan sebagai pangan fungsional adalah biji teratai. Biji teratai yang diproses menjadi tepung mengandung oligosakarida yang bersifat prebiotik yang baik untuk pencernaan. Penggunaan secara langsung tepung biji teratai tidak dapat dilakukan secara maksimal sehingga perlu dilakukan modifikasi pati. Modifikasi pati yang paling aman bagi bahan pangan adalah modifikasi secara fisik yaitu dengan metode HMT. Metode HMT yang sudah dilakukan hanya menggunakan satu variabel dalam satu waktu dan tidak ada perubahan pada variabel lainnya sehingga nilai optimasinya masih kurang, oleh karena itu perlu dilakukan optimasi menggunakan aplikasi Response Surface Methodology (RSM). Tujuan dari penelitian ini adalah mengembangkan metode modifikasi HMT yang ada menjadi lebih meningkat dengan membuat optimasi rancangan proses percobaan menggunakan aplikasi RSM. Penelitian ini menggunakan tiga variabel yaitu kadar air, suhu dan waktu pemanasan dengan mengambil level atas untuk kadar air 30% dan level bawah 25%. Suhu pemanasan yang diambil untuk level atas 95°C dan level bawah 85°C dan waktu pemanasan yang diambil untuk level atas 270 menit dan level bawah 210 menit. Hasil penelitian diketahu bahwa suhu merupakan variabel yang berpengaruh secara signifikan, sedangkan variable waktu dan kadar air tidak berpengaruh secara siginfikan terhadap nilai swelling power. Kadar air pati termodifikasi yaitu pada range 4,470 – 4,680%, sedangkan kadar abu sebesar 0,773 – 1,099%. Hasil analisis potensi prebiotic menunjukkan pertumbuhan bakteri pada penambahan 4% tepung sebanyak 1,5 X 104 cfu.
Efektivitas Eco Enzyme Terhadap Kadar Chemical Oxygen Demand (COD) Limbah Cair Industri Farmasi Mohammad Rheza Albin Wahyudi; Rita Dwi Ratnani; Indah Hartati
Jurnal Inovasi Teknik Kimia Vol. 11 No. 1 (2026): JANUARI | INTEKA - Jurnal Inovasi Teknik Kimia
Publisher : Fakultas Teknik Universitas Wahid Hasyim

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31942/inteka.v11i1.17154

Abstract

Pharmaceutical wastewater management remains a major environmental challenge due to its high content of complex organic pollutants. This study evaluated the effectiveness of eco enzyme as an environmentally friendly alternative for reducing Chemical Oxygen Demand (COD) in pharmaceutical industrial wastewater. Eco enzyme was produced by fermenting organic waste (apple peels, yam, and wax apple) with water and palm sugar at a ratio of 10:3:1 for six months. The experiment investigated eco enzyme concentrations of 2%, 4%, 6%, 8%, and 10% under contact times of 48, 96, and 144 hours. The results demonstrated that eco enzyme effectively reduced COD under specific operational conditions. The optimal performance was achieved at a 6% concentration with a 96-hour contact time, reducing COD to 25.84 mg/L. Higher concentrations and prolonged contact times did not improve treatment efficiency, indicating enzyme saturation and limited catalytic effectiveness. These findings highlight the potential of eco enzyme as a sustainable, natural coagulant for pharmaceutical wastewater treatment and provide a basis for optimizing operational parameters in future studies.

Page 31 of 31 | Total Record : 308

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