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INDONESIA
REACTOR : Journal of Research On Chemistry And Engineering
Published by Politeknik ATI Padang
ISSN : -     EISSN : 27460401     DOI : -
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Energy
1. Bioenergy 2. Waste Treatment 3. Simulation and control process 4. Advanced materials 5. Bioengineering (chemical & massa) 6. Bioprocess 7. General chemistry 8. Applied chemistry 9. Biochemical 10. and other as problem solving in the field of environment, energy, food, agriculture, medical and pharmacy
Arjuna Subject : Teknik Kimia (semua kategori) - Teknik Kimia (Lain-Lain)
Articles 130 Documents
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Pengaruh Jamur Tiram dan Lama Fermentasi Terhadap Karakteristik Fisik Biofoam Sabut Kelapa dan Pulp Kopi Dedy Rahmad; Dian Hasni; Dwi Kemala Putri; Addin Akbar; Kushisa Atta Jaeba
REACTOR: Journal of Research on Chemistry and Engineering Vol. 6 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v6i2.157

Abstract

The urge to develop more sustainable foam for food packaging is increasing due to the high potential danger of the usage of Styrofoam as food packaging. This study aimed to determine the physical qualities of bio-foam, which was prepared using Pleurotus ostreatus F2 as the fungal microorganisms and the composite of coconut fiber and coffee pulp as substrates. This research was designed as Randomized Complex Block Design with two factors and four repetitions. The ANOVA results showed that both independent factors and their interactions have a very significant effect on the density, porosity, water absorption, and biodegradability of the resulting bio-foam. The higher percentage of Pleurotus ostreatus F2 added (60%) tended to produce bio-foam with lower density, porosity, and water absorption compared to the lower percentage (50%). However, prolonged fermentation up to 5 days tended to increase density, porosity and water absorption of bio-foam. Resulted biofoam has potential to be used as food packaging with further improvement to strengthen the matrix and enhance ethe water absorption quality.
Fermentasi Kopi Robusta Dengan Lactococcus lactis subsp.Untuk Meningkatkan Kualitas Rasa Kopi Enny Nurmalasari; Kusmiyati; Agung Kurnia Yahya; Agnes Heratri; Sinju Kunikazari
REACTOR: Journal of Research on Chemistry and Engineering Vol. 5 No. 2 (2024)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.157

Abstract

Fermentation in coffee provides new modulation to the taste and sensory profile of coffee, thereby enhancing its flavor quality. Lactic Acid Bacteria (LAB) strains are used for fermentation in the wet process and have been proven to improve the overall flavor of the coffee. Therefore, in this study, coffee fermentation will be carried out using Lactococcus lactis subsp. to improve coffee flavor quality. The study begins with preparing the starter medium, starter culture, and fermentation. Subsequently, proximate analysis and a cupping test are conducted to assess the flavor profile of the coffee. The results of this study show that coffee fermentation can increase the number of LAB with longer fermentation times. Furthermore, proximate results indicate that fermented Robusta coffee contains 7.86% less fat compared to non-fermented Robusta coffee, which has 15.02% fat. The cupping test results for fermented Robusta coffee reveal a total score of 81, with the clean cup and uniformity aspects scoring 10. This total is higher than that of non-fermented Robusta coffee, thus proving that fermentation using Lactococcus lactis subsp. can improve coffee flavor quality.
Studi Simulasi Konseptual Kinerja Filter Koaleser Berbasis Tandan Kosong Kelapa Sawit (TKKS) untuk Pemisahan Biodiesel-Air Laudi Adytia Pratama; Hafshah Dwiyanti Sutopo; Oktrison; Harmiwati NH
REACTOR: Journal of Research on Chemistry and Engineering Vol. 7 No. 1 (2026)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v7i1.82

Abstract

This study aims to theoretically evaluate the performance of a liquid-liquid (biodiesel-water) separation system using an Oil Palm Empty Fruit Bunch (OPEFB)-based coalescer filter through a conceptual computational simulation approach. The separation design evaluation was conducted using SuperPro Designer software in batch operation mode with key operating conditions set at a temperature of 60°C. The modelling covered the entire stages, starting from the transesterification reactor, water washing, to the final separation in the coalescer filter unit (P-5). The equipment's performance was evaluated based on the mass fraction profile of the final product compared to the waste stream content. The simulation model projected that the OPEFB coalescer filter shows potential to operate as a heavy and light phase separator based on ideal thermodynamic assumptions. The conceptual product stream composition was dominated by Fatty Acid Methyl Ester (FAME) approaching 100% (>99.99%), with a theoretical water separation efficiency reaching 99.989%, while water, methanol, glycerol, and residual catalyst were comprehensively isolated into the heavy phase (waste) stream. It must be explicitly noted that this is a preliminary simulation study; no physical OPEFB coalescer has been fabricated or experimentally tested, and no analytical confirmation of the critical biodiesel-quality parameters has been conducted. The design of the OPEFB coalescer filter is theoretically feasible in separating post-washing biodiesel-water emulsions, highlighting the necessity to proceed to the physical fabrication and empirical testing stages for actual process validation.
Pengembangan Teknologi Tepat Guna Untuk Produksi Bioetanol Skala Komunitas. Studi Kasus Pemanfaatan Rumput Laut Sargassum Sp. di Gunungkidul, Yogyakarta. Eko Setiawan; Muh Arif Wibisono; Ferry Ikhsandy
REACTOR: Journal of Research on Chemistry and Engineering Vol. 7 No. 1 (2026)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v7i1.84

Abstract

Seaweed (Sargassum sp.) in Gunungkidul has potential as a third-generation bioethanol feedstock, but its development remains constrained by low conversion efficiency and reliance on laboratory-scale equipment. This study examines bioethanol production using an appropriate technology approach with equipment available in domestic market and evaluates the effect of HCl (1-5%) and silicone antibfoam addition (0.07-0.14% w/v) on the stability of the hydrolysis process. The experimental results showed that hydrolysis without antifoam produced uncontrollable foam with material loss up to 16%. Antifoam addition successfully controlled the foam, reduced loss to 5%, and increased Brix to 6-8%. Field measurements with a refractometer showed ethanol content of 22% (v/v), but laboratory verification using gas chromatography (GC) revealed ethanol content of 0.09% and total sugar in dried seaweed of 0.04%, far below literature values. This discrepancy proves that the refractometer overestimation is due to dissolved solids interference. Additionally, during the hydrolysis process, corrosion on SS304 and Cl2 gas were identified, requiring pH neutralization mitigation and scrubber system. Solid waste from fermentation has potential as an organic fertilizer mixture with water content of 91.35%, C-Organic of 0.975%, Total N of 0.07%, K₂O of 0.565%, and P₂O₅ of 0.070%. Integration with downstream industries such as the alginate industry (HCl 3% scenario) save consumption NaOH by 35,63% and HCl by 14,36%. This study concludes that appropriate technology framework is feasible for replication at the community scale, however, pretreatment optimization on raw material and standardized testing validation needs to be established and controlled.
Analisis Potensi Eco-Enzyme dari Limbah Kulit Buah dalam Penyisihan dan COD pada Air Sungai Tercemar Secara Batch Izraini Islamiati Putri; Ansiha Nur
REACTOR: Journal of Research on Chemistry and Engineering Vol. 7 No. 1 (2026)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v7i1.85

Abstract

Pencemaran air sungai akibat tingginya beban limbah organik menjadi permasalahan lingkungan yang serius, ditandai oleh tingginya nilai COD. Penelitian ini bertujuan menganalisis potensi eco-enzyme dari limbah kulit buah dalam menurunkan nilai COD pada air sungai tercemar secara batch. Eco-enzyme dibuat dari kulit pisang, jeruk, semangka, pepaya, dan nanas dengan rasio 3:1:10 (bahan organik:molases:air) melalui fermentasi tiga bulan. Pengujian dilakukan terhadap air sungai artifisial dengan variasi konsentrasi 5%, 10%, dan 15% selama 12 hari. Parameter yang diukur meliputi pH, suhu, DO, dan COD. Hasil menunjukkan eco-enzyme memiliki bioaktivitas protease, amilase, dan lipase. Penurunan nilai COD intensif pada hari ke-1 hingga ke-5 dan mencapai steady state pada hari ke-9 hingga ke-12. Konsentrasi 5% memberikan nilai COD akhir terendah (22-30 ppm) dengan kulit pisang dan nanas sebagai bahan baku terbaik.
Pengolahan Tekanan Tinggi Terhadap Evaluasi Mikrobiologi, Fisikokimia dan Sensori Minuman Ekstrak Tebu (Saccharum officinarum Linn) Diajeng Nur Syahfitri Hasibuan; Muhammad Said Siregar; Tun Norbrillinda Mokhtar; Mohamad Helmi Mohd Arshad; Nur Ilida Mohamad; Mohd Izwan Mohd Lazim
REACTOR: Journal of Research on Chemistry and Engineering Vol. 6 No. 1 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v6i1.170

Abstract

Sugarcane extract (Saccharum officinarum Linn) is a natural beverage rich in sucrose, glucose, and fructose, making it sweet and refreshing. However, its high sugar content, combined with high water activity and the absence of natural preservatives, makes it highly perishable. These conditions create an ideal environment for microbial growth, leading to enzymatic browning, fermentation, and contamination by spoilage microorganisms, significantly reducing its shelf life. To extend its shelf life while maintaining quality, effective preservation methods are essential. This research evaluates High Pressure Processing (HPP) as a non-thermal preservation technique, comparing untreated sugarcane extract (T1) with HPP-treated extracts at 400 MPa for 10 minutes (THPPc) and at lower pressures (200 MPa and 300 MPa). Analyses included Total Plate Count (TPC), yeast and mold (Y&M) counts, total coliforms, Escherichia coli, and physicochemical properties such as viscosity, water activity, brix, moisture, and color. Results indicated that HPP significantly reduced TPC from 2.60 × 10⁴ CFU/mL in untreated extract to 1.39 × 10² CFU/mL in THPPc. The Y&M count in the HPP-treated extract was less than 1.0 CFU/mL, compared to 1.20 × 10⁴ CFU/mL in the untreated sample. HPP also maintained key physicochemical properties, reducing viscosity from 18.00 mPa.s in T1 to 12.50 mPa.s in THPPc, while preserving color stability and sweetness perception. This study shows that HPP is an effective preservation method for sugarcane extract, providing a viable alternative to thermal processing by minimizing quality degradation and ensuring microbial safety.
Desulfurisasi Batubara Dengan Metode Leaching Menggunakan Gel Lidah Buaya Alfia Wahyuni; Diva Amanda Tanjung; Iqbal Hapsauqi; Reni Desmiarti; Erda Rahmilaila Desfitri
REACTOR: Journal of Research on Chemistry and Engineering Vol. 5 No. 2 (2024)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.136

Abstract

Coal is still the world's main energy source, widely used in power generation, steel production materials, cement industry, alumina processing plant paper factories and other chemical industries. Burning coal with high sulfur content produces sulfur dioxide gas (SO2), which can directly or indirectly disrupt the environment and contribute to air pollution and the formation of acid rain. Therefore, desulfurization has become an interesting research topic to improve coal quality. In this research, coal desulfurization is carried out using aloe vera gel as a solvent. 300 ml of aloe vera gel was contacted with 50 grams of coal using a magnetic stirrer with varying stirring speeds of 500 and 750 rpm, for duration 2, 3, 5 and 7 hours. Then, separated, dried, and analyzed for sulfur content, ash content, and calorific value. The results showed that the sulfur content decreased by 19.11% to 24.61%, the ash content decreased by 8.51% to 12.56%, and the calorific value was obtained respectively 6439cal/g, 6381 cal/g, 6433 cal/g, and 6467 cal/g.
Pengendalian Proses Pada Katalitik Pirolisis Serabut Kelapa Sawit Dengan Menggunakan Reaktor Batch Yeni Ria Wulandari; Amelia Sri Rezki; Dian Ayu Afifah; Rafiqul Hamdi
REACTOR: Journal of Research on Chemistry and Engineering Vol. 5 No. 2 (2024)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.158

Abstract

Indonesia is the largest producer of palm oil in the world. The palm oil industry always produces solid waste, one of which is palm fiber. Palm fiber can be processed into chemicals or renewable fuels. Catalytic pyrolysis is a pyrolysis process using a catalyst, the purpose of pyrolysis using a catalyst is to upgrade the product. In this study, the pyrolysis process was carried out in a batch reactor with controlled temperature. Catalytic pyrolysis was carried out at a temperature of 400oC with a catalyst to oil palm fiber ratio of 1:2. The control system uses a feedback controller system. Pyrolysis of palm fiber with Al white and NiCl (II) catalysts produces bio-oil products with the highest yield. Pyrolysis with Al2O3 catalyst produces higher Bio-char products. The density of the water phase bio-oil is close to the density of water, and the viscosity of the bio-oil with the oil phase is more than 10 Cp. Based on GC-MS analysis, the largest component in bio-oil is acetic acid. Bio-oil and Bio-char pyrolysis products have the potential as new chemicals, renewable energy and adsorbents.
Pengaruh Temperatur Pengeringan Terhadap Swelling dan Tensile Strength Edible Film Hasil Pemanfaatan Tepung Umbi Porang (Amorphophallus muelleri Blume) Mutia Amyranti; Ismi Nurlatifah; Siti Maftukhah; Lily Arlianti
REACTOR: Journal of Research on Chemistry and Engineering Vol. 5 No. 2 (2024)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.162

Abstract

Food packaging is the process of protecting a food product to maintain durability and quality consistency. Edible film made from porang tubers is a sustainable and innovative solution to reduce plastic waste and improve food preservation. Porang tuber (Amorphopallus muelleri blume) is a valuable plant as its high glucomannan content can be processed into porang flour. The drying process is one of the important steps in the preparation of porang tuber flour. One of the polysaccharides used in edible films is starch from glucomannan derived from Porang tubers. Glucomannan is an alternative material developed because of the high polysaccharide content in porang tubers, namely mannan, which has the ability to form a good film layer, good biocompatibility, biodegradable and has the ability to form a gel. This study was conducted with the aim to determine the effect of drying temperature on the results of edible films obtained, in terms of swelling and tensile strength values using porang tuber starch. The main stages of this research are the preparation of glycerol-plastized porang tuber flour solution and then the stage of making porang tuber flour edible film. In the manufacture of edible film, the drying process is carried out with temperature variations of 40, 50 and 600C. The highest swelling and tensile strength values were obtained in porang flour edible film at 50 0C, where the swelling and tensile strength values were 61.1% and 0.75 MPa.
Efektivitas Metode Fenton-TiO2-UV Terhadap Degradasi Warna dan Chemical Oxygen Demand Pada Pengolahan Palm Oil Mill Effluent Dedi Teguh; Windia Hanifah; Devy Cendikia; Arlina Phelia; Nita Pita Sari; Asraf Wa Adib
REACTOR: Journal of Research on Chemistry and Engineering Vol. 5 No. 2 (2024)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.160

Abstract

The palm oil industry produces POME (Palm Oil Mill Effluent) liquid waste. POME is generally brownish, has an odor, and contains dissolved and suspended solids in the form of colloids and oil residue with a high Chemical Oxygen Demand (COD) content. Currently, the POME processing system still uses a conventional system known as the open pond system. This research aims to reduce the burden of organic materials related to removing COD levels, and color. It can solve the technical and operational obstacles of conventional processing systems. One of the extensive efforts to process POME is to develop Fenton-based photocatalytic technology, namely the Fenton-TiO2-UV method. Photocatalytic technology has several general processes involving semiconductor photocatalysts such as TiO2 and photon (UV) energy sources. In this study, the Fenton-TiO2-UV method was used with variations in the Fenton molar ratio of 1:100, 1:200, 1:300 (v/v), reaction times of 30, 60, and 90 minutes with TiO2 concentration 0.6% and uses 2 UV lamps (15 watts). This study achieved the maximum color degradation percentage at a Fenton molar ratio of 1:100 with a reaction time of 30 minutes, namely 95.28%. Meanwhile, the maximum COD degradation percentage was achieved at a Fenton molar ratio of 1:100 with a reaction time of 90 minutes, namely 98.88%.

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