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Pemurnian Biogas Dari Gas Pengotor Hidrogen Sulfida (H2S) Dengan Memanfaatkan Limbah Geram Besi Proses Pembubutan

Jurnal Energi Dan Manufaktur Vol 5, No 1 (2012): Volume 5, Nomor 1, Oktober 2012
Publisher : Jurnal Energi Dan Manufaktur

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Abstract

This research is intended to utilize waste steel chips from the process of turning (process in which lathemachine is used) for purification of biogas from the gas of hydrogen sulfide (H2S) contaminant to supportthe promotion of zero waste industrial and manufacturing process in the world. The waste of Iron chips iscollected and selected. Only long and spiral like of iron chips that are useful for this purpose. Since thechips having residual stress due to strain hardening during turning process, then the annealing processshould be done before compacting to form a billet.The thickness of the billet was 1 cm and 6 cm indiameter with weight 500 gram. The annealing proces was carried out by burning the iron chip until reachthe red color of fire. During the annealing process the iron inside the steel will react with oxygen to formiron oxide (Fe2O3) and if during oxidation there is a water vapor in the air then the iron bog ore Fe(OH)3 willbe formed. Both of Fe2O3 and Fe(OH)3 are very reactive to H2S and therefore able to eliminate the H2Scontaminant inside the Biogas. The billet is used as a filter and to be installed in the line of biogasdistribution. The result indicate that the the iron chips is potential to be utilized to reduce the H2Scontaminant in the biogas

Strategi Peningkatan Kinerja Manajemen Rantai Pasokan Jeruk Siam Di Kelompok Tani Gunung Mekar Kabupaten Gianyar Demo

BETA (Biosistem dan Teknik Pertanian) Vol 4, No 2 (2016): September
Publisher : Universitas Udayana

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Abstract

Siam citrus (Citrus nobilis var. microcarpa) is one of Balis main commodities. However, the fact showed that agribusiness system of Siam citrus is not profitable enough for small scale farmers group. This research aimed to; (1) acknowledge the structure, mechanisms, and the systematic supply chain of Siam citrus in the Gunung Mekar Farmers Group of Gianyar Regency; and (2) know the priorities recommendations in order to increased supply chains performance of Siam citrus. This research study consisted of two stages, and each process required different respondents and analysis tools as well. The first stage (to know the structure, mechanisms, and systematic of the supply chain) is using the descriptive qualitative analysis, and the second stage (to know the recommendation priorities) is using the Analytical Hierarchy Process method (AHP) as the analysis tool. The sampling on farmer levels conducted purposively and the next sampling  level determined by snowball sampling method. The research resulted three distribution patterns of Siam citrus with traditional supply chain mechanism basic. The improvement of performance supply chain management on Siam citrus, information accessibility improvement, alternative reliability, and performance indicator of product quality became the most important priority.