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Membran Polieugenol Tersulfonasi (PET) Sebagai Potensi Sel Bahan Bakar Metanol Langsung Muliawati, Eka Cahya; Yustia Wulandari Mirzayanti
Journal of Research and Technology Vol. 7 No. 2 (2021): JRT Volume 7 No 2 Des 2021
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar

Nafion is a type of perfluorosulfonic acid membranes, are widely used in fuel cell technology and exhibit several disadvantages such as expensive, have a limited working temperature range and high methanol crossover. This study aims to produce an electrolyte new polymer membrane from polyeugenol sulfonated (PET) and a review of the membrane properties was carried out on the basis of Water Contact Angle (Â°), Water Uptake (%), Methanol Uptake (%), Swelling ratio (%), IEC (ion exchange capacity). Analysis of DMFC membrane performance has an optimal proton conductivity of 0.0009 S.cm-1 and methanol permeability of 23.5.10-7 cm2.s-1 with a PET composition of 27% (w/w). Â

Pemanfaatan Tempurung Kelapa sebagai Katalis pada Proses Konversi Minyak Curah Menjadi Biodiesel Yustia Wulandari Mirzayanti; Erlinda Ningsih; Zain Lillahulhaq; Zuhdi Ma’sum; Chevy Renova; Yasin Wijaya
Journal of Research and Technology Vol. 6 No. 2 (2020): JRT Volume 6 No 2 Des 2020
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v6i2.351

Vegetable oil is one of the alternative sources of raw material for fuel oil to produce biodiesel. The conversion reaction process requires the help of a catalyst to break down triglycerides into methyl esters. Therefore, this study aims to determine the performance of catalysts made from coconut shells to convert bulk oil into biodiesel. The catalyst performance is focused on biodiesel's yield parameters through the influence factor of catalyst weight, molar ratio, and %FAME. This research was conducted in three stages, namely (1) catalyst preparation, (2) application of catalyst performance through the conversion process of bulk oil into biodiesel, (3) washing of biodiesel. The first stage was catalyst preparation carried out by utilizing a coconut shell, which was first made into charcoal, then activated using H3PO4 then sulfonated with H2SO4. The second stage was the conversion process of bulk oil into biodiesel using coconut shell catalysts through a transesterification process using variations in the catalyst's weight to bulk oil (0.5; 1; 1.5; 2; and 2.5% wt/wt) and bulk oil molar:methanol ratio (1: 3; 1: 6; and 1: 9). The third stage was the process of washing biodiesel using HCl. Based on this study's results, the best catalyst weight was 2% wt/wt with a molar ratio of 1: 9 resulting in the highest yield of 89% and the FAME of 80.36%.

Pengaruh Variasi Konsentrasi NaOH sebagai Nutrisi pada Performansi Biogas Tipe Portabel Syamsuri; Yustia Wulandari Mirzayanti; Wiwik Widyo Widjajanti; Samuel Kristian Bani
Journal of Research and Technology Vol. 6 No. 2 (2020): JRT Volume 6 No 2 Des 2020
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v6i2.353

Biogas is a gas fuel produced by anaerobic activity or fermentation of organic materials, including human and animal waste, domestic (household) waste, or anaerobic degradation of organic materials by anaerobic bacteria. In this study, biogas was used as fuel with the addition of NaOH variations to the modified gasoline generator set engine so that it could work to produce electricity. This experiment used variations of 2, 4, 6, 8, and 10% NaOH nutrition with variations in the electric load of 10, 15, 20, 25, 30, 35, 40, 45, and 50 watts. These purposed to determine the performance of electric power, torque, and system efficiency. From the test, it found that the greater load of the lamp, the smaller performance of the electric power produced. The results showed that the greatest electric power was the variation of 2% NaOH nutrition with a lamp load of 10 watts, namely 39.33 watts. In the efficiency testing, the greater electric load system resulted efficiency system tent to be stable. The best system efficiency with 2% NaOH nutrition was compared to other nutritional variations. In testing of torque, the greater electric load torque resulted also greater torque. The greatest torque with 2%, NaOH nutrition compared to other nutritional variations.

Enhancing Industrial Wastewater Oil Removal Through Integrated Coagulation–Flocculation Pretreatment and Dissolved Air Flotation (DAF) Yustia Wulandari Mirzayanti; Purwaningsih, Dian Yanuarita; Ni'am, Achmad Chusnun; Awaludin, Aditya Fikri
Journal of Research and Technology Vol. 10 No. 2 (2024): JRT Volume 10 No 2 Des 2024
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v10i2.1516

Oil content in the water that exceeds the threshold can pollute the environment if disposed of directly without waste treatment. This study conducted a case study of engineering waste treatment containing 1% oil using the Dissolve Air Flotation (DAF) method through coagulant and flocculant pre-treatment. The independent variable used in this study is pressure and residence time, where the pressure variable consists of 0.6, 0.8, 1, 1.2, and 1.4 bar, while the residence time variables comprised 5, 15, 30, 45, and 60 minutes. This study obtained the maximum pressure and residence time, namely at a pressure of 1.4 bar and a residence time of 60 minutes; the highest oil removal was 98.32%. Turbidity removal was 92.31% in 1% of engineering waste for engineering destruction.

Analysis of Health Protocol Implementation Through UTAUT (Unified Theory of Acceptance and Use of Technology) Model in Trenggalek DistrictMODEL IN TRENGGALEK DISTRICT Daniati, Reni; Andini, Rizqi Aulia Kusuma; Ni'am, Achmad Chusnun; Utami, Rahayu Putri; Mirzayanti, Yustia Wulandari; Prasetya, Kevin Daffa; Agatha, Marsha Savira
Journal of Research and Technology Vol. 10 No. 2 (2024): JRT Volume 10 No 2 Des 2024
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v10i2.1531

The COVID-19 pandemic has introduced significant behavioral changes driven by adopting health protocols known as the 5M measures—mask-wearing, handwashing, maintaining physical distance, limiting mobility, and avoiding crowds. This study evaluates the implementation of the 5M health protocols in Trenggalek and Bendungan Districts, representing urban and rural areas, respectively. Utilizing the Unified Theory of Acceptance and Use of Technology (UTAUT) model, modified with Clean and Healthy Behavior (PHBS) constructs, this research examines community awareness and adherence to 5M protocols. A survey involving 758 respondents from both districts was conducted during the pandemic to assess factors influencing compliance. The findings highlight that social influence through counseling, advertisements, and posters plays a pivotal role in shaping behavioral intentions related to protocol adherence. Furthermore, these intentions directly influence actual behavior, reinforcing sustained compliance with the 5M measures. Notably, urban and rural contexts demonstrated similar patterns, underscoring the universal impact of social influence regardless of geographic setting. This study concludes that strengthening community engagement and targeted social campaigns can enhance public health resilience and preparedness for future pandemics by fostering sustainable health-conscious behavior.

Pemanfaatan Tempurung Kelapa sebagai Katalis pada Proses Konversi Minyak Curah Menjadi Biodiesel Yustia Wulandari Mirzayanti; Erlinda Ningsih; Zain Lillahulhaq; Zuhdi Ma’sum; Chevy Renova; Yasin Wijaya
Journal of Research and Technology Vol. 6 No. 2 (2020): JRT Volume 6 No 2 Des 2020
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v6i2.351

Vegetable oil is one of the alternative sources of raw material for fuel oil to produce biodiesel. The conversion reaction process requires the help of a catalyst to break down triglycerides into methyl esters. Therefore, this study aims to determine the performance of catalysts made from coconut shells to convert bulk oil into biodiesel. The catalyst performance is focused on biodiesel's yield parameters through the influence factor of catalyst weight, molar ratio, and %FAME. This research was conducted in three stages, namely (1) catalyst preparation, (2) application of catalyst performance through the conversion process of bulk oil into biodiesel, (3) washing of biodiesel. The first stage was catalyst preparation carried out by utilizing a coconut shell, which was first made into charcoal, then activated using H3PO4 then sulfonated with H2SO4. The second stage was the conversion process of bulk oil into biodiesel using coconut shell catalysts through a transesterification process using variations in the catalyst's weight to bulk oil (0.5; 1; 1.5; 2; and 2.5% wt/wt) and bulk oil molar:methanol ratio (1: 3; 1: 6; and 1: 9). The third stage was the process of washing biodiesel using HCl. Based on this study's results, the best catalyst weight was 2% wt/wt with a molar ratio of 1: 9 resulting in the highest yield of 89% and the FAME of 80.36%.

Pengaruh Variasi Konsentrasi NaOH sebagai Nutrisi pada Performansi Biogas Tipe Portabel Syamsuri; Yustia Wulandari Mirzayanti; Wiwik Widyo Widjajanti; Samuel Kristian Bani
Journal of Research and Technology Vol. 6 No. 2 (2020): JRT Volume 6 No 2 Des 2020
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v6i2.353

Biogas is a gas fuel produced by anaerobic activity or fermentation of organic materials, including human and animal waste, domestic (household) waste, or anaerobic degradation of organic materials by anaerobic bacteria. In this study, biogas was used as fuel with the addition of NaOH variations to the modified gasoline generator set engine so that it could work to produce electricity. This experiment used variations of 2, 4, 6, 8, and 10% NaOH nutrition with variations in the electric load of 10, 15, 20, 25, 30, 35, 40, 45, and 50 watts. These purposed to determine the performance of electric power, torque, and system efficiency. From the test, it found that the greater load of the lamp, the smaller performance of the electric power produced. The results showed that the greatest electric power was the variation of 2% NaOH nutrition with a lamp load of 10 watts, namely 39.33 watts. In the efficiency testing, the greater electric load system resulted efficiency system tent to be stable. The best system efficiency with 2% NaOH nutrition was compared to other nutritional variations. In testing of torque, the greater electric load torque resulted also greater torque. The greatest torque with 2%, NaOH nutrition compared to other nutritional variations.

Pengaruh Konsentrasi NaOH, Urea, dan Rumen terhadap Performa Generator Berbahan Bakar Biogas Syamsuri; Yustia Wulandari Mirzayanti; Sigit Setiawan
Journal of Research and Technology Vol. 7 No. 1 (2021): JRT Volume 7 No 1 Jun 2021
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v7i1.430

Biogas is a gas produced from anaerobic activity or the fermentation of organic materials, including human waste, animal waste, and waste. Biogas from cow dung can be used as an alternative fuel. In this study, biogas is used as fuel with the addition of variations of NaOH, urea, and rumen to the modified gasoline generator set engine so that it can work to generate electricity. This research was conducted by experimenting with varying nutrients, namely NaOH, urea, and rumen. Besides that, variations in the electrical load are carrying out for 15, 20, 25, 30, 35, 40, and 45. This is intended to determine the performance of the electrical energy produced. From the test, it was found that the voltage and engine speed of the generator set tended to decrease for the addition of variations in the electric load. Meanwhile, current, power, torque, average adequate pressure, and total efficiency increase for all additional electric load variations. The results showed that the most incredible efficiency was using 43.57% NaOH nutrition. For the variation of Urea nutrition in biogas, obtained total efficiency of 42.16%. Meanwhile, rumen nutrition variation has the most negligible efficiency than other nutritional variations, 39.55%.

Membran Polieugenol Tersulfonasi (PET) Sebagai Potensi Sel Bahan Bakar Metanol Langsung Muliawati, Eka Cahya; Yustia Wulandari Mirzayanti
Journal of Research and Technology Vol. 7 No. 2 (2021): JRT Volume 7 No 2 Des 2021
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v7i2.478

Nafion is a type of perfluorosulfonic acid membranes, are widely used in fuel cell technology and exhibit several disadvantages such as expensive, have a limited working temperature range and high methanol crossover. This study aims to produce an electrolyte new polymer membrane from polyeugenol sulfonated (PET) and a review of the membrane properties was carried out on the basis of Water Contact Angle (°), Water Uptake (%), Methanol Uptake (%), Swelling ratio (%), IEC (ion exchange capacity). Analysis of DMFC membrane performance has an optimal proton conductivity of 0.0009 S.cm-1 and methanol permeability of 23.5.10-7 cm2.s-1 with a PET composition of 27% (w/w).

Removal of COD and Color Concentration in Batik Wastewater Using Electrofenton Niam, Achmad Chusnun; Mirzayanti, Yustia Wulandari; Fardiansyah, Muhammad Edo; Ningsih, Erlinda
Journal of Research and Technology Vol. 9 No. 2 (2023): JRT Volume 9 No 2 Des 2023
Publisher : 2477 - 6165

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55732/jrt.v9i2.1040

The effluent discharged from the batik textile industry often contains azo compounds and organic contaminants. One method employed to address these pollutants is the Electrofenton (EF) technique. This study aims to assess the effectiveness of electrofenton in reducing both color content and COD (Chemical Oxygen Demand) in batik dyeing effluent. The Electrofenton process was conducted in batch mode, varying electrode distances at 4 cm and 6 cm, H2O2:FeSO4 molarity ratios of (10:0.05) and (10:0.1), and electric voltage strengths at 6 volts and 8 volts. The research revealed that employing an electric voltage of 8 volts, an electrode distance of 4 cm, a contact time of 120 minutes, and a Fenton dosage molarity of 10:0.05 M resulted in a remarkable removal efficiency of 97.8% with a final concentration of 103 mg/L for color content. Additionally, for COD, employing the same parameters led to a removal effectiveness of 90.1%, with a final concentration of 730 PtCo. The impact of Fenton dosage on COD removal was statistically analyzed using the t-test. The computed t-value of 3.444 surpassed the tabulated t-value of 2.776, indicating a significant influence of Fenton dosage on COD removal.

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