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Eksergi: Chemical Engineering Journal
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : 1410394X     EISSN : 24608203     DOI : https://doi.org/10.31315
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology
Eksergi is an open-access, peer-reviewed scientific journal that focuses on research and innovation in the fields of energy and renewable energy. The journal aims to provide a platform for scientists, researchers, engineers, and practitioners to share knowledge and advancements that contribute to sustainable development and energy transition. In addition to energy topics, the journal also accepts high-quality manuscripts related to, but not limited to, the following areas: Separation processes Bioprocesses related to food, energy, and environmental applications Wastewater treatment and resource recovery Process optimization and intensification Carbon capture, utilization, and storage (CCUS) Chemical reaction engineering and reactor design Life cycle assessment (LCA) and sustainability evaluation Process Design and Control Engineering Process Simulations Process System Engineering The journal welcomes original research articles, reviews, and short communications that demonstrate novelty, scientific rigor, and relevance to chemical engineering and interdisciplinary applications.
Arjuna Subject : Energi (semua kategori) - Energi Terbarukan, Keberlanjutan dan Lingkungan
Articles 13 Documents
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Search results for , issue "Vol 20, No 3 (2023)" : 13 Documents clear
Produksi Asam Laktat Melalui Jalur Biologi dan Jalur Kimia Katalitik Menggunakan Berbagai Bahan Baku Aini, Apsari Puspita; Nurmalasari, Enny; Rasrendra, Carolus Borromeus; Sitompul, Johnner
Eksergi Vol 20, No 3 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i3.9768

Abstract

Aplikasi asam laktat pada berbagai industri menarik minat para peneliti untuk memproduksi asam laktat melalui berbagai jalur reaksi. Perolehan isomer asam lakat yang lebih murni dibandingkan dengan jalur reaksi kimia katalitik menjadikan jalur biologi dengan fermentasi menjadi jalur reaksi yang banyak dipakai di industri. Berbagai mikroorganisme pada golongan Lactic Acid Bacteria telah digunakan untuk memproduksi asam laktat baik dalam skala laboratorium maupun skala industri. Berbagai bahan baku dapat dikonversi menjadi asam laktat seperti, dihidroksi aseton, gliseraldehid, piruvaldehid, xilosa, glukosa, fruktosa, sukrosa, selulosa, insulin, selobiosa, pati, levoglukosan dan lignoselulosa. Kemampuan katalis dalam metode kimiawi menarik banyak minat peneliti untuk mencari alternatif pembuatan asam laktat yang bisa mengkonversi gula menjadi asam laktat dengan waktu reaksi yang lebih singkat. Penggunaan berbagai katalis mulai dari katalis homogen dan heterogen terbukti dapat menghasilkan asam laktat dengan yield yang bervariasi. Katalis lanthanum triflate terlihat menghasilkan asam laktat dengan perolehan yang baik walaupun dari bahan baku lignoselulosa yang perlu perlakuan awal terlebih dahulu karena mempunyai senyawa lignin yang bisa menghalangi kerja katalis.Kata Kunci: asam laktat; kimia katalitik; fermentasi; lignoselulosa  ABSTRACT: The utilization of lactic acid for various applications encourages researchers to produce lactic acid by various reaction pathways. The yield of lactic acid isomer which is purer than the catalytic chemical reaction makes the biological pathway by fermentation widely used in industry. Various microorganisms in the Lactic Acid Bacteria categories have been used to produce lactic acid both on a laboratory and industrial scale. Various raw materials can be converted into lactic acid such as dihydroxy acetone, glyceraldehyde, pyruvaldehyde, xylose, glucose, fructose, sucrose, cellulose, insulin, cellobiose, starch, levoglucosan and lignocellulose. The ability of catalyst has attracted interest of researcher to find alternatives for making lactic acid that can convert sugar into lactic acid with a shorter reaction time. The use of various catalysts from homogeneous and heterogeneous catalysts has been proven to produce lactic acid with varying results. The lanthanum triflate catalyst proven to produce lactic acid with a high yield, even though it is from lignocellulosic raw materials that need pre-treatment to remove lignin compounds which can inhibit the performance of the catalyst.Keywords: lactic acid; chemical catalytic; fermentation;  lignocellulose  
Effect of ZnO Addition on The Characteristics of Cotton Fabric in The Batik Fabric Dyeing Process Fatimah, Siti; Kencana, Syaifunnisa Puspa; 'Aarifah, Shofwatul; Eskani, Istihanah Nurul
Eksergi Vol 20, No 3 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i3.9895

Abstract

For centuries, batik fabric has been a part of Indonesian culture and is recognized by UNESCO as an Intangible Cultural Heritage of Humanity. Batik fabric is essential for daily use and has become a part of Indonesian people, e.g., birth to death ceremonies. Besides some advantages of batik fabric made from cotton, it also has disadvantages because it quickly grows bacterial. Hence, it is essential to develop antibacterial properties on batik fabrics. This study used ZnO as an antibacterial agent. The mechanical properties and the colorfastness of fabrics have been evaluated to study the effect of ZnO application. The results showed that applying ZnO affected the mechanical properties of batik fabric by increasing the tensile strength and elongation at break. The result also showed that the ZnO did not affect the colorfastness of rubber and light by the similar value of untreated batik fabric.
Decreasing Of Oxalate Content in Porang Based on Different Sample Shape, Soaking Time, Temperature, and Soaking Solutions Sugiarto, Bambang; Sulistyowati, RR Endang; Dewi, Cicilia Tri Marantika; Hendranto, Rahadian Yogi
Eksergi Vol 20, No 3 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i3.9269

Abstract

Porang, known for its high oxalate content that poses digestive challenges, served as the underlying problem in this study. The research investigated the impact of immersion conditions on oxalate reduction in porang, both in the form of longitudinal slices and diced pieces, using various soaking media, including vinegar, alcohol, and water, with temperature variations. The study identified that the optimal immersion time for achieving maximum oxalate reduction in longitudinal slices was 150 minutes at 50°C in water, resulting in a 0.00495% decrease. In the case of diced porang, the most significant reduction occurred after 120 minutes at 70°C in alcohol, leading to a 0.0045% decrease. These findings shed light on the influence of porang shape and soaking conditions on oxalate release, with diced porang demonstrating faster oxalate reduction, likely due to its smaller surface area. The study offers valuable insights into effectively reducing oxalate levels in porang, contributing to safer consumption.

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