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INDONESIA
International Journal of Natural Science and Engineering
Published by Universitas Pendidikan Ganesha
ISSN : 26151383     EISSN : 25496395     DOI : -
Core Subject : Engineering,
Engineering
International Journal of Natural Sciences and Engineering (IJNSE) is an independent, quarterly basis online & print version, open access, peer reviewed, non-profit journal that publishes original research, short communications, review articles or essays, and book reviews relevant to Natural Sciences and Engineering. IJNSE is published by the Universitas Pendidikan Ganesha (Undiksha), Indonesia.
Arjuna Subject : -
Articles 5 Documents
 1 
Search results for , issue "Vol. 8 No. 1 (2024): April" : 5 Documents clear
Technical and Economic Analysis of Distillation Column Design in the Biodiesel Industry Erwan Adi Saputro; Ahmad Rizaldi; Sanjoyo, Bandung Arry
International Journal of Natural Science and Engineering Vol. 8 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v8i1.44743

Abstract

The distillation column is one of the vital components in the biodiesel industry equipment, functioning to separate biodiesel compounds from other compounds such as glycerin and residual methanol. This research aims to analyze future predictions of distillation column prices based on the specified equipment specifications. This type of research is quantitative research with a descriptive approach. The type of research used in this study is quantitative descriptive research with a case study approach and technical simulation. In this study, the methodology used to estimate distillation equipment costs in biodiesel production involves a comprehensive two-stage approach: Equipment specifications are determined based on production capacity, and then price estimates are carried out using the Peters & Timmerhaus formula. In this research, the sample used is technical and economic data related to distillation column design in the biodiesel industry. The calculation data is compared with actual prices on the market to validate the accuracy of the method. The data analysis technique used is economic engineering estimation calculations accompanied by empirical comparisons. The research results show that increasing production capacity requires larger distillation column specifications, such as tower diameter, tower height, and number of holes in the tray, and more complex supporting accessories to support optimal performance. Price comparison shows that the estimation method using the Peters & Timmerhaus formula produces fairly accurate predictions of current market prices. These findings imply that this method can be used as an adequate approach to planning the procurement of distillation columns in the biodiesel industry more efficiently. The implications of this research show that optimal distillation column design not only increases the efficiency of the biodiesel purification process but also significantly reduces operational costs and initial investment. From a technical perspective, proper design can increase product purity, reduce energy consumption, and extend equipment life, ultimately improving overall plant performance.
Enhanced Distillation Efficiency for Formic Acid Production: Simulation and Optimization with Aspen HYSYS Fauzia, Farah; Sari, Dessy Agustina
International Journal of Natural Science and Engineering Vol. 8 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v8i1.78935

Abstract

This study investigates the simulation and optimization of the distillation column AT-660 at PT Chemical Happy, focusing on improving the efficiency and purity of formic acid production using Aspen HYSYS V10. Data collection involved operational conditions, component compositions, and flow rates from the plant, which were used to develop a detailed process model. The simulation assessed current performance and identified discrepancies between simulated results and actual data. Optimization runs identified key parameters, such as reflux ratio, feed location, and column pressure, that significantly impact separation efficiency and product purity. The results demonstrated enhanced performance of the distillation column, with increased formic acid purity and improved operational efficiency. The study highlights the practical applications of simulation software in industrial settings, providing actionable insights for process improvement and contributing to the development of more efficient and sustainable chemical engineering practices.
Redesign of the User Interface of the School Examination Website of SMK Nusa Dua Using the Design Sprint Method Giri Wijaya, Gede Wesbyana; A.A. Istri Ita Paramitha; Eka Grana Aristyana Dewi
International Journal of Natural Science and Engineering Vol. 8 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v8i1.83081

Abstract

The Online Exam Website has encountered issues related to its user interface and lack of mobile responsiveness. This study aims to analyze and enhance the User Interface (UI) design and improve the User Experience (UX) to better meet current user needs. The research employed a mixed-methods approach, collecting qualitative data through interviews and observations, and quantitative data through a questionnaire based on the System Usability Scale (SUS). Subjects were selected using the Focus Group Discussion (FGD) technique, involving 6–10 active users. The study applied the Design Sprint method, focusing on a human-centered approach to develop solutions based on user needs. Data were analyzed using descriptive qualitative and quantitative techniques. The findings indicate a significant improvement in UI and UX aspects based on user feedback on the newly developed prototype. The results imply that the application of the Design Sprint method is effective in optimizing website design according to actual user requirements.
Determination of Total Flavonoid, Iron (Fe) and Chlorophyll Content of Brazilian Spinach Extract (Althernanthera sisso) based on Different Types of Extraction Solvents Heri Setyo Bekti; Ratih, Gusti Ayu Made
International Journal of Natural Science and Engineering Vol. 8 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v8i1.84661

Abstract

Brazilian spinach (Alternanthera sissoo) is known to contain various bioactive compounds such as flavonoids, iron (Fe), and chlorophyll that have the potential to be utilized in the health and food fields. However, the levels of these compounds can vary depending on the type of solvent used in the extraction process, so research is needed to determine the most effective solvent. Brazilian spinach (Alternanthera sissoo) is a vegetable species originally from Brazil that has begun to be cultivated in Indonesia. It contains secondary metabolites such as flavonoids, alkaloids, steroids, and saponins. Additionally, this plant has relatively high levels of iron and chlorophyll compared to other vegetables, with chlorophyll playing an important role in treating anemia and assisting the body in utilizing iron. This study aims to analyze the most effective solvent for extracting total flavonoids, iron (Fe), and chlorophyll from Brazilian spinach, supporting its potential development as a food supplement ingredient. This research employed a quasi-experimental design using a completely randomized design (CRD). The samples were Brazilian spinach extracted with 70% ethanol, ethyl acetate, and methanol. The concentrations of the compounds were determined using UV-Vis spectrophotometry and Atomic Absorption Spectrophotometry (AAS). The results showed that methanol extraction produced the highest extract yield (10.87%), the highest iron content (10.205 mg/kg), chlorophyll content of 13,586.571 mg/kg, and total flavonoids of 900.128 mg/100gQE. Based on these findings, methanol was identified as the most effective solvent for extracting bioactive compounds from Brazilian spinach. These results imply that Brazilian spinach has strong potential to be developed as a natural source for food supplements.
Microlearning-Based Learning Video on the Content of Grade IV Elementary School Science Lesson Pande Made Meiza Putra; Adrianus I Wayan Ilia Yuda Sukmana; I Komang Sudarma
International Journal of Natural Science and Engineering Vol. 8 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/ijnse.v8i1.85394

Abstract

This research problem focuses on the limited use of technology-based learning media in schools, which affects students' low understanding of IPAS material. This research aims to create a microlearning-based learning video that is valid, practical, and effective in increasing the motivation and learning outcomes of grade IV elementary school students. This type of research is development research (R&D) with ADDIE design. The research subjects involved 31 fourth grade students and 3 experts for validation. The data collection methods used were questionnaires and tests. While the instruments used were questionnaire sheets and multiple choice tests. The data analysis process in this study involved various techniques, including qualitative, quantitative, and inferential descriptive analysis. Qualitative analysis will come from the results of questionnaires, interviews, input and criticism by experts. Meanwhile, the quantitative analysis was obtained from the calculation of the validity, practicality, and effectiveness tests of the media. Finally, hypothesis formulation and conclusions were drawn through inferential descriptive analysis. The results showed that there was a significant difference between after and before being taught using microlearning-based video media on IPAS learning content. So it can be concluded that the media developed is valid, practical, and effective to use. The results of this study are expected to be used as a reference or reference if interested in researching the use of learning media, especially microlearning-based learning videos in schools and among the community.

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