<p>Organic wastes has potential as a renewable energy resource. The waste could be converted as a gaseous fuel through gasification method. The objective of this reserach was to study the performance of gasification of various organic waste using fixed bed updraft gasifier especially in term of production of heat and stability of gas production. The raw material that used are rice husk, sawdust pellet, and wood branch. The stabilization of gas production was measurdd based on the time interval of gas could be burnt. The result shows that the kind of biomass has influenced the heating rate and stability of gas production. Sawdust pellet have the biggest burning stabilisation, that is 45 minute of burning time, compare to rice husk that have 15 minute burning time, and wood branch that have 30 minutes burning time. The main problem of gasification of organic waste was less stabilization of gas production due to low material compaction and uncontinuous mass flow.</p>
Pirolisis adalah sebuah metode daur ulang yang digunakan untuk mengurangi dampak lingkungan dari sampah plastik di Indonesia. Disini, karakteristik dari produk pirolisis sampah plastic jenis Low Density Poli Etilena (LDPE) telah diteliti lebih lanjut. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh waktu tinggal (residence time) pada rendemen dan properti produk cair (minyak pirolisis), gas (non-condensable gas), dan padatan (arang). Penelitian dilakukan menggunakan reactor batch skala kecil yang dilengkapi dengan sebuah siklon, kondensor, steam-atomizing burner, dan sistem flare. Pirolisis dilakukan dalam waktu 30, 60, dan 90 menit pada suhu 3500C. Hasil penelitian menunjukkan bahwa semakin lama waktu tinggal akan menghasilkan jumlah minyak dan gas yang lebih besar, namun menghasilkan arang yang lebih kecil. Produk minyak tersebut memiliki sifat fisik yang mendekati kerosene dengan nilai kalor 20.019–20.047 BTU/lb, massa jenis 0.7754–0.7802 g/ml, viskositas kinematik 1.392–1.603 mm2/s, dan titik nyala di abwah 11°C. Minyak tersebut juga mengandung asam asetat, metil oleat, 1-hidroksi-2-propanon, furan metanol, and metil siklopentan sebagai senyawa-senyawa yang utama.
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