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All Journal Eksergi: Chemical Engineering Journal Halal Research Journal
Pambudi, Alfian Wisnu
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Application of Milkfish Bone-Based Gelatin as an Alternative to Non-halal Gelatin Setyabudi, Latif; Pambudi, Alfian Wisnu; Gunawan, Setiyo
Halal Research Vol 4 No 2 (2024): July
Publisher : Halal Center ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j22759970.v4i2.1732

Abstract

Collagen partially hydrolyzes to produce gelatin that functions as a gelling and non-gelling agent for various industries. Currently, Indonesia cannot produce its own gelatin, so to meet its needs, Indonesia imports 100%. However, many imported gelatins are still made from pork, so they need to be replaced to ensure that the gelatin is halal . This paper discusses the substitution of pork-based gelatin with milkfish bones. The general process for making gelatin from milkfish bones involves extracting, drying, demineralizing, degreasing, and determining the gelatin yield. Brackish water fish collagen, including milkfish, contains approximately 12–14 kDa parvalbumin, suggesting the potential for allergic reactions among consumers. Meanwhile, the critical point for halal gelatin extracted from milkfish bones is the origin of the milkfish bones and the use of citric acid as an extractor. Although there are still weaknesses, gelatin from milkfish can replace pork-based gelatin, and it can have a positive impact on the Indonesian economy by reducing gelatin imports.
Comparative Analysis of CO₂ Content in Biogas and Synthetic Gas Using Chittick Titration Validated by Gas Chromatography Pambudi, Alfian Wisnu; Rahmawati, Yeni; Taufany, Fadlilatul; Altway, Ali; Susianto
Eksergi Vol 22 No 2 (2025)
Publisher : Prodi Teknik Kimia, Fakultas Teknik Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/eksergi.v22i2.14809

Abstract

This study aimed to validate the Chittick titration method for measuring carbon dioxide (CO2) content using gas chromatography (GC) as the reference method. Two types of gas samples were analyzed: synthetic CO2/N2 gas with a theoretical composition of 40:60 and biogas produced by anaerobic fermentation. Analyses were conducted in parallel using both methods to compare CO2 measurements. For synthetic gas, the Chittick titration recorded an average CO2 content of 39.11%, whereas GC recorded 40.52%. For biogas, Chittick titration produced 30.16%, whereas GC measured 31.40%. The differences between the methods were 0.81% for synthetic gas and 1.55% for biogas, with relative errors of 2.00% and 3.45%, respectively. The t-test results showed statistically significant differences (p < 0.05) between the methods for both gas types. However, the observed deviations remained within practically acceptable limits for small-scale laboratory applications. These findings suggest that Chittick titration is a practical and cost-effective alternative for estimating CO2 content, particularly in laboratories with limited access to gas chromatography equipment. This study is expected to serve as a useful reference for educational institutions and small laboratories that are seeking to develop simple gas analysis methods with adequate validity.
Co-Authors Ali Altway Fadlilatul Taufany Setiyo Gunawan Setyabudi, Latif Susianto Yeni Rahmawati, Yeni