Manufacture of Biobriquettes from Alaban (Vitex pubescens) Biomass Waste and Rubber Seed Shells using Damar Resin Adhesive


Ninis Hadi Haryanti
Nova Annisa
Hafiizh Prasetia
Nida Humaida
Anny Sulaswatty

Using biomass as the main ingredient in briquettes is more environmentally friendly because biomass does not contain elements that endanger the health or the environment. This study used experimental research to utilize waste-based charcoal from Alaban wood and rubber seed shells as briquette materials. The raw materials were all ground into powder using a 60-mesh filter. The varied compositions of charcoal from Alaban wood and rubber seed shells were as follows: 100%:0%, 90%:10%, 70%:30%, 50%:50%, 30%:70%, 10%:90%, and 0%:100%. Additionally, 9% resin was added as an adhesive. The briquettes were shaped into 2 x 5 cm cylinders with a printing pressure of 200 kg/cm2 and then dried at room temperature and in the sun for three days. These waste-based briquettes exhibited the following characteristics: an average calorific value of 7645–8731 cal/g, a water content of 2.21-2.72 percent, and an ash content of 5.34–7.86 percent. Furthermore, the quality of briquette combustion was assessed, with an average length of initial ignition time ranging from 3.06 to 4.17 minutes, a burning duration of 92.07–125.27 minutes, and a combustion speed of 0.16-0.22 g/minute. The results indicated that as the percentage composition of Alaban wood charcoal increased, the moisture and ash levels decreased while the calorific value increased. Moreover, regarding the quality of briquette combustion, a higher percentage composition of Alaban wood charcoal led to faster initial ignition times, longer combustion durations, and lower burning speeds. With a calorific value exceeding 5,000 cal/g, these waste-based briquettes meet national standards for commercial briquettes and are expected to serve as an alternative renewable fuel, addressing various environmental challenges.


Keywords:Alaban wood, Briquettes, Resin, Rubber seed shells, Waste-based charcoal

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