Briket biomassa adalah bahan bakar alternatif terbarukan yang tersusun dari residu tanaman melalui proses densifikasi. Briket biomassa diketahui memiliki efisiensi yang lebih baik dibandingkan dengan briket batu bara, lebih ekonomis, dan ramah lingkungan. Salah satu limbah biomassa yang dapat digunakan sebagai bahan baku pembuatan briket adalah ampas teh karena memiliki kandungan serat kasar terutama lignin. Penelitian ini mempelajari pengaruh waktu dan suhu karbonisasi, ukuran partikel, jenis perekat, serta komposisi bahan baku terhadap karakteristik briket ampas teh. Proses pembuatan briket diawali dengan pengeringan ampas teh, proses karbonisasi menggunakan furnace, pencampuran briket dengan perekat alami, dan pengeringan briket di dalam oven, dengan beberapa variabel yang dipelajari. Karakteristik briket terbaik diperoleh pada komposisi ampas teh : tepung sagu (9:1), suhu karbonisasi 450°C dan ukuran partikel 60 mesh, yaitu menghasilkan briket dengan kadar air 4,201%, kadar zat mudah menguap 31,536%, kadar abu 31,584%, kadar karbon terikat 36,88%, dan nilai kalor sebesar 2.872,026 kal/kg.
<em><span lang="EN">Gelatin is a type of protein derivate from collagen fibers that can be extracted from bone. This study aims to determine the effects of temperature and extraction time on the extract of isolated gelatin from tilapia fish bones. Gelatin isolation stages include degreasing using water, demineralization with a ratio of 1:10 (w/v) tilapia bone powder and distilled water, and extraction. The extraction used distilled water with a ratio of ossein and distilled water 1:10 (w/v). The extraction temperature was varied at 50<sup>o</sup>C, 60<sup>o</sup>C, and 85<sup>o</sup>C, for 1 hour, 3 hours, and 5 hours. The highest yield of gelatin was obtained at a temperature of 60<sup>o</sup>C in 1 hour, i.e. 0.86 g (yield of 9.55%). The test on gelatin obtained the gelatin viscosity from 1,442-2,844 cP, gelatin pH 5,2-6,8, and ash content of 2,143-2,778%. The FTIR test showed that the product contained amine and carbonyl functional groups at the wavelengths of 1206.53 cm<sup>-1</sup>, 1270.18 <sup>cm-1</sup>, and 1286.58 cm<sup>-1</sup>. The gelatin obtained meets the commercial gelatin quality standards.</span></em>
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