Judul: Laterit Iron Ore Reduction from Bayah, Banten Province with Coal Reductor.
Abstrak: Iron ore is one of the most usually found metal in Indonesia. The energy problems faced by the national steel industry can be reduced by using coal reductor. Indonesia is a country which has coal reserves at least 38.8 billion tons. The objectives of this research are to enrich laterite iron ore in iron rock with benefiziation, to get optimum temperature of laterite iron ore rediction, and to compare the final reduction result between calcite and bentonite addings. This research covers several stages, includes sample preparation, iron ore analysis (includes silicate, total Fe, and Fe2+), spons iron producing (iron ore reduction), spons iron analysis (includes total Fe and metal Fe), calcite and bentonite chemical composition analysis (includes CaO, MgO, and silicate), and coal analysis (includes moisture contain, volatile matter (vm), fixed carbon (fc) contain, and ash contain). Based on the results of the research is that the silicate content decreased after the benefiziation from 5.90% to 2.69%, which total Fe content has been increased from 56.70% to 64.51%. The used coal was a type of sub-degree bituminus with 47.19% fixed carbon which it was quite effective for reduction process. The function of the bentonit addings was as a sticker which can make the pellet was more better and made the metalization contain was higher than the calcite addings with respectively percentage are 82.11% and 80.63%. The range of optimum temperature of the iron ore laterit reduction from bayah is 1000oC to 1100oC. Laterit iron ore from bayah could be used as alternative raw materials for steel production.
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Judul: Transformation of Red Mud from PT Indonesia Chemical Alumina into Coagulant for Water Treatment of Kapuas River
Abstrak: Red mud merupakan limbah industri aluminium yang dihasilkan dalam jumlah yang sangat besar oleh PT Indonesia Chemical Alumina. Penelitian ini bertujuan memanfaatkan senyawa oksida logam seperti besi oksida (Fe2O3) dan aluminium oksida (Al2O3) yang ada dalam limbah untuk memperoleh produk koagulan cair atau padat menggunakan media asam dan garam, menentukan konsentrasi pelarut asam sulfat yang optimum untuk mengekstraksi Fe dan Al, mengaplikasikan produk koagulan dalam pengolahan air sungai Kapuas, dan membandingkan kinerja produk koagulan dari material tersebut dan koagulan komersial (tawas). Proses ini melibatkan perlakuan sebanyak 40 g red mud, diekstraksi menggunakan 240 mL H2SO4 dan 18,75 g NaCl pada suhu 110 °C selama 4 jam. Hasil ekstraksi diperoleh 3,12% Fe dan 1,05% Al dengan menganalisis koagulan cair. Analisis difraksi sinar-X menunjukkan bahwa koagulan padat terdiri dari Na2S2O3.5H2O, AlClO4H6, Al2(SO4)3, Fe2(SO4)3, FeSO4, dan FeCl3. Koagulan padat yang dihasilkan dari red mud mampu mengurangi 42% nilai padatan terlarut total, 39% nilai padatan tersuspensi total, mengubah kadar logam besi (Fe), dan dapat memperbaiki pH air sungai Kapuas., Red mud is an industrial waste produced in large quantities by PT Indonesia Chemical Alumina. This study aims to use metal oxide such Fe2O3 and Al2O3 present in the waste to get liquid or solid coagulant products using acid and salt media, find the best concentration of sulfuric acid solvent to extract Fe and Al, apply coagulant products in Kapuas River water treatment, and compare the performance of coagulant products from these materials and commercial coagulants (alum). This process involved the treatment of 40 g of red mud, extracted using 240 mL of H2SO4 and 18.75 g of NaCl at 110 °C for 4 hours. As much as 3.12% Fe and 1.05% Al by analyzing liquid coagulant. X-ray diffraction analysis showed that the solid coagulant consisted of Na2S2O3.5H2O, AlClO4H6, Al2(SO4)3, Fe2(SO4)3, FeSO4, and FeCl3. The solid coagulant produced from red mud was able to cut 42% of the total dissolved solids value, 39% of the total suspended solids value, change the iron metal content (Fe), and may improve the pH of the Kapuas river.
Keyword: aluminum oxide, iron oxide, coagulant, aluminum industrial waste, red mud

Judul: Penerbangan Otomatis Pesawat Tanpa Awak Jenis Sayap Tetap dengan iNav
Abstrak: Pesawat tanpa awak (UAV) dapat dikendalikan secara manual dengan remote control atau secara otomatis dengan flight controller (FC). Salah satu jenis UAV adalah sayap tetap yang memiliki bentuk seperti pesawat terbang pada umumnya. Penelitian ini bertujuan untuk melakukan penerbangan otomatis pada UAV jenis sayap tetap dengan mengkonfigurasi perangkat FC. UAV yang digunakan adalah model SkySurfer X8 dengan bentang sayap 1.4 m. FC yang digunakan adalah Matek F405-Wing yang dikonfigurasi dengan perangkat lunak iNav. Berdasarkan hasil uji terbang, UAV berhasil terbang secara otomatis mengikuti skenario yang diberikan. Skenario terjauh berupa persegi berukuran 600×600 m pada ketinggian 100 m, yang ditempuh dalam waktu sekitar 2 menit dengan kecepatan sekitar 65 km/jam. Diharapkan prosedur perakitan, konfigurasi, operasi, dan hasil data uji terbang dapat menjadi acuan dalam penelitian selanjutnya.
Keyword: iNav, penerbangan otomatis, pesawat tanpa awak, sayap tetap