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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 121 Documents
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Pengendalian Proses Pada Katalitik Pirolisis Serabut Kelapa Sawit Dengan Menggunakan Reaktor Batch Wulandari, Yeni Ria; Rezki, Amelia Sri; Afifah, Dian Ayu; Hamdi, Rafiqul
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 2: December 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.
Fermentasi Kopi Robusta Dengan Lactococcus lactis subsp. Untuk Meningkatkan Kualitas Rasa Kopi Nurmalasari, Enny; Kusmiyati, Kusmiyati; Yahya, Agung Kurnia; Heratri, Agnes; Kubikazari, Sinju
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 2: December 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.
Desulfurisasi Batubara Dengan Metode Leaching Menggunakan Gel Lidah Buaya Wahyuni, Alfia; Tanjung, Diva Amanda; Hapsauqi, Iqbal; Desmiarti, Reni; Desfitri, Erda Rahmilaila
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 2: December 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.
Pengaruh Temperatur Pengeringan Terhadap Swelling dan Tensile Strength Edible Film Hasil Pemanfaatan Tepung Umbi Porang (Amorphophallus muelleri Blume) Amyranti, Mutia; Nurlatifah, Ismi; Maftukhah, Siti; Arlianti, Lily
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 2: December 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.
Optimasi Pemanfaatan Katalis TiO2/Karbon Aktif (Sekam Padi) Untuk Degradasi Methyl Violet Secara Sonolisis dan Fotolisis Safni, Safni; Aldini, Tasya; Yefrida, Yefrida; Zilfa, Zilfa; Deliza, Deliza
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 2: December 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.156

Abstract

The textile industry is a major contributor to pollution, with 10-15% of dyes lost in wastewater during processing, including Methyl Violet. The degradation products of these dyes are often carcinogenic. Conventional biological treatment methods are ineffective due to the complex nature of synthetic dyes. A study aimed to develop a new photocatalytic activity using a UV A lamp and sonolysis using a sonicator. The study modified TiO2/Activated Carbon from Rice Husk as a catalyst to degrade Methyl Violet and textile industry effluent effectively, which was dual benefits as an adsorbent-photocatalyst. Results showed that the degradation by sonolysis and photolysis was 12.99% and 79.16%, respectively. The degradation by photolysis was 14.95% and 94.12%. The light and catalyst with the highest percentage of degradation were TiO2/activated carbon with UV A light of 94.12%. This study aims to develop effective treatment techniques for the textile industry's dyes.
Efektivitas Metode Fenton-TiO2-UV Terhadap Degradasi Warna dan Chemical Oxygen Demand Pada Pengolahan Palm Oil Mill Effluent Teguh, Dedi; Hanifah, Windia; Cendekia, Devy; Phelia, Arlina; Sari, Nita Pita; Adib, Asraf Wa
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 2: December 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%.
Penggunaan Biji Pepaya Sebagai Koagulan Alami Dalam Pengolahan Air Limbah Domestik Adawiyah, Syardah Ugra Al; Koly, Faryda Veronica Lamma
REACTOR: Journal of Research on Chemistry and Engineering Vol 5, No 2: December 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v5i2.155

Abstract

One of the chemical contaminants in domestic wastewater is phosphate. High phosphate levels in water can cause algae bloom (eutrophication), which leads to a decrease in oxygen concentration in the water body and subsequently results in the death of aquatic organisms. Papaya seeds contain natural polymers in the form of proteins that act as natural polyelectrolytes, helping to reduce chemical contaminants in waste. This study aims to determine the most effective dose of papaya seed coagulant (Carica papaya L.) for lowering phosphate levels, turbidity and pH of domestic wastewater. An experimental method was used with varying sizes and doses of papaya seed coagulant: 70, 80 dan 90 mesh, and doses: 0.5 grams, 1 gram, 1.5 grams, and 2 grams, tested using a jar test. The reduction in phosphate levels in domestic wastewater was measured with a UV-Vis spectrophotometer. The results showed the treatment of domestic wastewater for reducing phosphate levels using papaya seed (Carica papaya L.) coagulant can be achieved by adding 2 grams of coagulant with a particle size of 90 mesh. Under these conditions, the phosphate levels decreased from 2.1529 mg L⁻¹ to 0,1907 mg L⁻¹, with an efficiency of 88.96%. According to the Domestic Wastewater Quality Standard No. 68 of 2016, the maximum allowable phosphate concentration is 0.2 mg L⁻¹, making the research results close to the established standard. Additionally, turbidity decreased from 86.55 NTU to 26.40 NTU, while the pH level increased from 6.5 to 6.9. This study suggests that papaya seeds could be a cost-effective, sustainable alternative for domestic wastewater treatment, especially in reducing phosphate contamination and helping maintain water quality
Sintesa dan Karakterisasi Bioplastik Dari Tandan Kosong Kelapa Sawit Dengan Modifikasi Penambahan Plasticizer Gliserol dan Sorbitol Luthfi, Muhammad Zulfikar; Miftahurrahmah, Miftahurrahmah; Sutri, Reni; Nury, Dennis Farina
REACTOR: Journal of Research on Chemistry and Engineering Vol 6, No 1 (2025): June 2025
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v6i1.168

Abstract

Plastic waste is a global environmental issue due to its non-biodegradable nature. One potential solution is the development of eco-friendly bioplastics derived from natural materials. This study aims to develop bioplastics based on sago starch with the addition of microfibrillated cellulose (MFC) from empty palm oil fruit bunches as a reinforcing filler to enhance mechanical properties. Additionally, plasticizers such as glycerol and sorbitol were added to improve the elasticity of the bioplastic. The plasticizer concentrations used were 1, 5, 10, 20, and 30% w/w. Characterization was conducted through mechanical property tests (tensile strength, elastic modulus, and elongation percentage), morphological analysis using SEM, and structural analysis with Fourier Transform Infrared Spectroscopy (FTIR spectroscopy). The results showed that the addition of 5% glycerol produced a tensile strength of 26.39 MPa with an elongation of 1.2%, while 20% sorbitol yielded a tensile strength of 25.35 MPa with an elongation of 6.2%. Based on the Indonesian National Standard (SNI) for plastics, the combination of sago starch and MFC with 20% sorbitol provided the best mechanical properties, with a tensile strength of 25.35 MPa and an elongation percentage of 5.6%. In conclusion, sago starch-based bioplastic with MFC from oil palm empty fruit bunches has the potential to serve as an environmentally friendly alternative to synthetic plastics.
Pengaruh Penambahan Kalsium Karbonat (CaCO₃) Terhadap Kekerasan Material HDPE/LDPE Enggita, Asadian Puja; Ikhsandy, Ferry; Jaman, Winda Sri; Syafaatullah, Achmad Qodim
REACTOR: Journal of Research on Chemistry and Engineering Vol 6, No 1 (2025): June 2025
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/reactor.v6i1.179

Abstract

Plastic waste recycling has been extensively studied, particularly in applications such as paving blocks, asphalt mixtures, and composite boards. One critical parameter affecting the quality of these products is material hardness. This study examines the effect of CaCO₃ addition on the hardness of polymer composite materials. The preparation process involved collecting, washing, drying, sorting, and shredding plastic waste, followed by mixing High Density Polyethylene (HDPE) and Low-Density Polyethylene (LDPE) at a ratio of 1:5. Calcium carbonate (CaCO₃) was added at varying concentrations (0%; 0,5%;1,0%; 1,5%, and 2,0%), and the mixture was melted using an extruder and subsequently molded. The results indicate that the addition of 1,5% CaCO₃ yields the highest and most stable hardness value across three tests, achieving 4,77 HV with a standard deviation of 0,0577. Furthermore, microstructural analysis reveals that up to 1,5% CaCO₃ leads to the most uniform filler distribution, optimizing both hardness and material stability. This study reveals that increasing CaCO₃ concentration enhances composite material hardness when evenly distributed and homogeneous. However, excessive CaCO₃ concentration may result in agglomeration, negatively impacting composite properties.
Pengolahan Tekanan Tinggi Terhadap Evaluasi Mikrobiologi, Fisikokimia dan Sensori Minuman Ekstrak Tebu (Saccharum officinarum Linn) Hasibuan, Diajeng Nur Syahfitri; Siregar, Muhammad Said; Mokhtar, Tun Norbrillinda; Arshad, Mohamad Helmi Mohd; Mohamad, Nur Ilida; Lazim, Mohd Izwan Mohd
REACTOR: Journal of Research on Chemistry and Engineering Vol 6, No 1 (2025): June 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. 

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