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All Journal TEKMAPRO Journal of Industrial Engineering and Management Nusantara Science and Technology Proceedings Proceeding ISETH (International Summit on Science, Technology, and Humanity)
Sari, Komang Nickita
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Medicine & Pharmacology Social Sciences Other

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Optimization of Glucose from Saccaromycess cerevicae Liquid Waste Using the Acid Hydrolysis Process Sari, Ni Ketut; Ernawati, Dira; Sari, Komang Nickita
Nusantara Science and Technology Proceedings 8th International Seminar of Research Month 2023
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/nstp.2024.4103

Abstract

Selection of Saccharomyces Cereviceae (SC) wastewater as a component produced by PT. Enero comes from a fermentation process that uses SC yeast, it’s availability is great and it has not been used as a raw material for glucose, which until now has been industrial waste. Efforts have been made to convert SC waste water into liquid fertilizer and biodiesel feedstock. The recovery of glucose from SC waste water in the chemical hydrolysis process using the reaction surface method (RSM), the hydrolysis process was carried out with a digital stirrer at a rotation speed of 200 rpm and the addition of 5 ml of 10% NaOH. The variables used were 50–250 mL SC waste water and 10–30 mL HCl volume. The optimization results using RSM of the chemical hydrolysis process are shown in three-dimensional graphs, pH and SC waste water ratio and HCl volume, glucose content and SC waste water ratio and HCl volume. The best results with SC waste volume of 8.58 mL and HCl volume of 34.14 mL achieved a pH of 4.38. In order to achieve a pH of 4.5, a hydrolysis process is carried out because the pH of the SC waste water is very acidic, i.e. 3.5, and 10% NaOH is added to increase the pH. The result of glucose from the hydrolysis process is 17.96%, the required volume of waste water SC of 137.14 ml, the addition of 34.14 ml of HCl as a raw material for the fermentation process. Based on the optimization results using RSM and chemical hydrolysis method, the glucose content is 17.96% and the pH is 4.38 with the SC water waste volume of 137.14 mL and the HCl volume of 34.14 mL.
Understanding Remanufacturing Business in Indonesia: Insights from an Initial Survey Anityasari, Maria; Fernando, Antonius; Suhariyanto, Tatbita Titin; Sari, Komang Nickita; Kusumawardani, Rindi; Akbar, Reza Aulia
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2024: Proceeding ISETH (International Summit on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/iseth.5413

Abstract

Purpose: This study aims to investigate the current state and challenges of remanufacturing practices in Indonesia, particularly in the heavy equipment sector, including key barriers and opportunities identification. Methodology: A survey involving 23 companies working in the heavy equipment sector was conducted to gather their remanufacturing practices, challenges, and perspectives. The study examines issues related to definitions, regulations, core availability, and quality assurance of remanufactured items. Results: The survey reveals wide variety and inconsistencies in defining remanufacturing due to the absence of standardized definitions and government regulations. This triggers complexities in business process especially in sourcing high-quality cores and communicating the quality of remanufactured items to consumer. Applications/Originality/Value: The findings highlight the need for future research to create a conducive ecosystem for remanufacturing in Indonesia including regulation and policy development. This study provides valuable insights for enhancing the development of the remanufacturing industry.
Analisis Lanskap Penelitian Remanufaktur dan Perilaku Konsumen: Studi Literatur Sistematis Sari, Komang Nickita; Anityasari, Maria; Sari, Ni Ketut
Tekmapro Vol. 19 No. 2 (2024): TEKMAPRO
Publisher : Program Studi Teknik Industri Universitas Pembangunan Nasional Veteran Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/tekmapro.v19i2.423

Abstract

Penelitian mengenai remanufaktur telah berkembang pesat dalam beberapa dekade terakhir seiring dengan meningkatnya perhatian terhadap keberlanjutan dan ekonomi sirkular. Remanufaktur adalah proses perbaikan dan peremajaan produk bekas sehingga produk tersebut dapat digunakan kembali dengan kualitas yang setara dengan produk baru. Proses ini membantu mengurangi limbah, penggunaan sumber daya alam, serta menawarkan solusi ekonomis bagi konsumen dan produsen. Namun, adopsi praktik remanufaktur menghadapi berbagai tantangan, terutama di negara berkembang seperti Indonesia, di mana pemahaman konsumen mengenai produk remanufaktur masih rendah dan persepsi terhadap produk murah sebagai produk berkualitas rendah masih dominan. Ketidakjelasan dalam definisi remanufaktur juga menjadi hambatan besar bagi peneliti dan praktisi, menyebabkan kesulitan dalam melakukan penelitian yang efektif dan menyebarkan pengetahuan tentang proses tersebut. Oleh karena itu, penelitian ini dilakukan untuk memberikan pemahaman yang lebih mendalam mengenai lanskap penelitian remanufaktur yang terkadang masih ambigu dan membutuhkan eksplorasi lebih lanjut. Dengan menggunakan metode eksploratif dan systematic literature review, penelitian ini bertujuan untuk mengidentifikasi tren terkini dan isu-isu penting yang mempengaruhi adopsi praktik remanufaktur, serta memberikan wawasan mengenai perbedaan perilaku konsumen di negara maju dan berkembang terhadap produk remanufaktur.
Co-Authors Akbar, Reza Aulia Dira Ernawati Fernando, Antonius Maria Anityasari Ni Ketut Sari Rindi Kusumawardani, Rindi Suhariyanto, Tatbita Titin