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All Journal Industrial Innovation Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit
Wahyu Fajar Winata
Politeknik ATK Yogyakarta

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Use of Lime Suspension and Lime Water as a Solution in Goat Skin Appliance as an Initiative for Implementing Clean Products Prasetyo Hermawan; Wahyu Fajar Winata
Industrial Innovation Vol. 2 No. 1 (2025): Industrial Innovation
Publisher : Politeknik ATK Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/d34zmb56

Abstract

The study aimed to compare the effects of using lime suspension and saturated lime water in the goat skin liming process, focusing on solution properties and skin characteristics. Liming was conducted at 26 °C for 60 minutes using a stirrer, with a skin-to-solution ratio of 1:10 and 2 g Ca(OH)₂ per 100 ml water. The initial pH values were 11.69 (lime suspension) and 11.62 (lime water), while initial conductivity was 7439 μS/cm and 4971 μS/cm, respectively. Observed variables included pH, TDS, electrical conductivity, precipitate weight, and skin weight gain and characteristics. Results showed no significant difference in pH between treatments during liming (p = 0.075) and no significant difference in skin weight gain (p = 0.067). However, solution conductivity differed significantly (p = 0.002), with lime suspension producing higher conductivity values. At the end of liming, precipitate weights were 1.53 g for lime suspension and 0.04 g for lime water, indicating more undissolved material in the suspension method. Skin characteristics, such as color, pH, and elasticity, were similar for both treatments. The findings suggest that while lime suspension and lime water produce comparable results in terms of pH and skin weight gain, they differ in conductivity and precipitate formation. The reduced precipitate in lime water indicates a cleaner process, which could contribute to clean production practices in the leather industry by minimizing solid waste without compromising leather quality. This research provides a scientific basis for considering saturated lime water as an alternative to lime suspension, potentially reducing environmental impact while maintaining product performance in goat skin leather processing. 
THE EFFECT OF MOLASSES AS AN ADHESIVE MATERIAL FOR MAKING ENVIRONMENTALLY FRIENDLY LIVESTOCK PELLETS wahyu fajar winata; Hafitz Noprianto Ramadhan; Dimas Betran Saputra
Berkala Penelitian Teknologi Kulit, Sepatu, dan Produk Kulit Vol. 24 No. 2 (2025): Berkala Penelitian Kulit, Sepatu, dan Produk Kulit
Publisher : Politek ATK Yogyakarta Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58533/j18yvr80

Abstract

This study aims to determine the effect of using molasses and starch adhesives on the physical quality of pellets made from fleshing waste generated by the leather tanning industry. The research employed a Completely Randomized Design (CRD) with three treatments: no adhesive (P0), addition of 2.5% molasses (P1), and addition of 2.5% starch (P2), each with three replications. The observed parameters included the physical characteristics of the pellets (color, texture, aroma, and compactness) as well as their reaction response to HCl solution. The results showed that the addition of adhesives significantly improved pellet quality. Treatment P1 produced the most compact, dense, and stable pellets, with a more intense reaction to HCl, while P2 provided moderate improvements and remained superior to P0. Pellets without adhesive (P0) had a loose structure, were less compact, and easily crumbled. Therefore, molasses is identified as the most effective adhesive for improving the physical quality and stability of pellets made from fleshing waste, whereas starch can serve as an alternative adhesive with lower effectiveness.
Co-Authors Dimas Betran Saputra Hafitz Noprianto Ramadhan Laili Rachmawati Nur Mutia Rosiati Prasetyo Hermawan Rina Dwi Asmarani