Pengaruh Variasi Komposisi Perekat Molase Pada Briket Tongkol Jagung Dan Kotoran Kambing Sebagai Bahan Bakar Alternatif

Risqullah, Dzaki Agil (2026) Pengaruh Variasi Komposisi Perekat Molase Pada Briket Tongkol Jagung Dan Kotoran Kambing Sebagai Bahan Bakar Alternatif. Undergraduate thesis, Politeknik Negeri Jember.

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Abstract

This study aims to analyze the effect of variations in molasses adhesive composition on the physical characteristics and combustion performance of bio-briquettes made from a mixture of goat manure and corn cobs. An experimental method using a Completely Randomized Design (CRD) was employed. The raw materials were carbonized through pyrolysis (300-350 °C), ground, and sieved (80 mesh). The charcoal mixture used a fixed ratio of 3:1 (corn cobs : goat manure). The tested variations of molasses adhesive were 30%, 35%, and 40% of the total briquette mass of 20 grams. The briquettes were hydraulically molded and dried in an oven at 105 °C for 6 hours. The results showed that increasing the molasses percentage (from 30% to 40%) increased the density (0.864-0.926 g/cm³), bulk density (0,035-0,041 g/m³), moisture content (4.82%-5.39%), ash content (7.28%-7.93%), and volatile matter (7.21%-9.50%). Conversely, the calorific value, burning rate, and fixed carbon decreased. Nevertheless, all samples still met the SNI 01-6235-2000 quality standards. The optimum formulation was obtained at the 30% molasses adhesive variation. This composition produced the highest calorific value of 5,217.18 cal/g (SNI standard ≥5000 cal/g), moisture content of 4.82% (SNI standard ≤8%), ash content of 7.28% (SNI standard ≤8%), volatile matter of 7.21% (SNI standard ≤15%), fixed carbon of 80.69%, and a burning rate of 0.0071 g/s. A lower adhesive content preserved the dominance of biomass carbon, thereby generating higher and more efficient heat energy.

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