TY - JOUR AU - Kansai, Nattakarn AU - Chaisuwan, Nichakorn AU - Supakata, Nuta PY - 2018/12/04 Y2 - 2024/03/28 TI - Carbonized Briquettes as a Tool for Adding Value to Waste from Rain tree (<i>Samanea Saman</i>) and Coffee Ground/Tea Waste JF - Engineering Journal JA - Eng. J. VL - 22 IS - 6 SE - DO - 10.4186/ej.2018.22.6.47 UR - https://engj.org/index.php/ej/article/view/2727 SP - 47-63 AB - <p>The purpose of this research was to study the physical, environmental, and economic characteristics of carbonized briquettes from rain tree (<em>Samanea saman</em>) residues and coffee ground/tea waste with cassava starch (10% wt.). There were five treatments in this experiment. As a binder, 10%wt cassava starch was added to five ratios of rain tree residues to coffee ground/tea waste: RT100:CT0, RT75:CT25, RT50:CT50, RT25:CT75, and RT0:CT100. The physical properties of the carbonized briquettes were analyzed using ASTM methods. The results showed that the carbonized briquette made from 50% rain tree (<em>Samanea saman)</em> residues and 50% coffee ground/tea waste (RT50:CT50) had the highest calorific value (4,820.25 ± 9.97 Kcal/kg)—not significant at the 95% confidence interval—and highest shatter index (99.16 ± 0.20%). However, all ratios of rain tree residues to coffee ground/tea waste can produce carbonized briquettes for household use with convenience for transportation. In terms of economic performance, carbonized briquettes made from 50% rain tree (<em>Samanea saman)</em> residues and 50% coffee ground/tea waste (RT50:CT50) achieved the optimal payback period (approximately 6 months). Thus, making carbonized briquettes from rain tree residues and coffee ground/tea waste can be an alternative method of production to add value to biomass residue for use as raw materials to produce environmentally friendly fuel products.</p> ER -