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Journal : Jurnal Ecolab

ASPEK LINGKUNGAN DAN PEREKAYASAAN PROSES DAUR ULANG KALENG MINUMAN DAN ABU SEKAM PADI SEBAGAI MATERIAL KOMPOSIT MELALUI METODE METALURGI SERBUK Khaerudini, Deni S; Tetuko, Anggito P; Sebayang, P; Muljadi, Muljadi
Jurnal Ecolab Vol 3, No 2 (2009): Ecolab : Jurnal Pemantauan Kualitas Lingkungan
Publisher : Pusat Penelitian dan Pengembangan Kualitas dan Laboratorium Lingkungan (P3KLL)

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Abstract

The use of recycling aluminum from beverage can and rice-hull ash (RHA) offers an alternative material is presentedin this work. The aluminum cans are cut in little flakes in 5 – 10 mm size with a shears, and then were milled to obtainfine powders. Milling process was conducted in vibratory disc mill with milling variation for 10 and 20 minute. RHAwas obtained by calcinations of the rice-hulls at 900oC during 2 h in electrical furnace under oxidizing atmosphere.While, SiC as another silica source was utilized. After obtained aluminium fine powder from beverage can as matrixand silica powder from rice-hull and SiC as reinforce, then the raw material were milled by powder metallurgy methodfor production of Al/SiCp composites. The reinforcement composition of SiC to RHA was 30:20% vol., while thevolume ratio of matrix to reinforce was 80 to 20. The specimen test was obtained by cold compaction at 300 MPa andsintering at 600oC under high purity nitrogen atmosphere with holding time for 1 h. The composites sample weresubmitted at mechanical tests and samples microstructures were analyzed by optical microscope. Experimentalresults obtained shows that the use of RHA was beneficial to avoid corrosion through the formation and subsequenthydration of the Al4C3 phase and this recycle composite sample have significant potential as alternative material forautomotive or mechanical tools application. For ecological and economic routes, it reduces the use of city landfillsas consequently of abundant of aluminium beverage can and rice-hull, and the technique utilized in this work is veryimportant for economized routes and consequently, less expensive, compared to conventional methods.
PEMBUATAN BATAKO DARI ABU HASIL INSINERASI SAMPAH DOMESTIK DAN KARAKTERISASINYA Wigayati, Etty Marti; Muljadi, Muljadi
Jurnal Ecolab Vol 2, No 2 (2008): Ecolab : Jurnal Pemantauan Kualitas Lingkungan
Publisher : Pusat Penelitian dan Pengembangan Kualitas dan Laboratorium Lingkungan (P3KLL)

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Abstract

Garbage problems are increasing day by day. Garbage problems may generate environmental pollution problemswith its impact are continued to be increased. One of the technology to destroy the garbage is by incinerator. Thestudy was trying to reuse the ash resulted from the incineration of garbage by incinerator which have an addedvalue. The ash composition was similar as clay, so the ash could be used as a raw material for making batako whichare the weight ratio between sand and comment was 3:1. Some of sand was substituted by ash from incinerator withcompositions of 0%, 10%, 20%, 25%, and 30%. All the raw materials were homogenously mixed, and then wereformed by casting and were dried in open air variation of time between 7 days and 28 days. The resulting dried batakowere characterized for its density as indicated the decreasing density was in line with the increasing of ash assubstituted and the drying time of 28 days gave result the bigger one. The porosity value decreased along with theash content and giving the smallest one after drying 28 days. The water absorption value will decreased along withthe increasing ash content and the longer time of drying process. The bending and compressive strength value weregrowing larger with increasing ash content, and by giving 25% ash, the compressive strength value became stabilized.Comparing to the existing batako market, batako using incinerator ash gave better quality.
PREPARASI BETON POLIMER BERBASIS SLUDGE – ABU TERBANG DAN KARAKTERISASINYA Sebayang, Perdamean; Muljadi, Muljadi; Khaerudini, Deni S; Tetuko1, Anggito P
Jurnal Ecolab Vol 3, No 2 (2009): Ecolab : Jurnal Pemantauan Kualitas Lingkungan
Publisher : Pusat Penelitian dan Pengembangan Kualitas dan Laboratorium Lingkungan (P3KLL)

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Abstract

Polymer concrete has been made using fly ash and sludge waste for raw material bases, and epoxy resin was used asbinder material. The sludge raw material was dried and crushed until fine powder morphology, then the fly ash wascrushed again until through out 100 mesh and it blended until became homogeneous mixing materials. The rawmaterial compositions where added with epoxy resin, that is: 10 and 15 % from the total weight of raw material. Thesample testing was made by hand press method with dimension: 4 x 4 x 16 cm3. The testing of samples included:density, water absorption, fire resistance, compressive, and bending strength. Microstructure analysis was usedScanning Electron Microscope (SEM) method. The results show that polymer concrete based on fly ash - sludge andepoxy resin binder is properly moderate, if it is compared to conventional concrete. The best result has the compositionof 60 % fly ash, 40 % sludge, and 15 % epoxy resin (% weight) composition, with its characteristics: density= 1.93 g/cm3, water absorption = 0.74 %, compressive strength = 28 MPa, and bending strength = 12.8 MPa. Thepolymer concrete that has been made is suitable for building material application, especially in the water or submergedarea, and it also has light weight concrete specification.
PEMBUATAN UNIT PENGOLAHAN AIR KOTOR MOBILE MENJADI AIR BERSIH DAN LAYAK MINUM DENGAN KAPASITAS 10 LITER/MENIT Tetuko, Anggito P.; Sebayang, P; Muljadi, Muljadi; Indayaningsih, Nanik
Jurnal Ecolab Vol 4, No 1 (2010): Ecolab : Jurnal Pemantauan Kualitas Lingkungan
Publisher : Pusat Penelitian dan Pengembangan Kualitas dan Laboratorium Lingkungan (P3KLL)

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Abstract

Air kotor dapat mempengaruhi kesehatan masyarakat, karena bisa mencemari sumber air dengan penyakit ini danbakteri, seperti E. coli. Untuk mengatasi masalah ini, teknologi yang tepat diperlukan untuk mengubah air kotormenjadi air bersih dan air minum. Satu teknologi adalah membuat sistem penyaringan air dengan menggunakanair sungai dan output bisa langsung minum. Dirancang dan dibangun penyaringan air kemudian diuji yang terdiriatas kualitas air dan kapasitas produksi. Kualitas air Sungai Cisadane, air bersih dan air minum dianalisis; terdiriatas fisik, kimia, dan mikrobiologi. Teknologi yang digunakan dalam unit penyaringan air didasarkan pada penyaringanair secara fisis dengan menggunakan sistem penyaringan dengan media filter granular dan disertai denganproses penyaringan menggunakan reverse osmosis (RO) dan ultraviolet (UV). Hasil penelitian menunjukkanbahwa kapasitas aktual air bersih dan air minum adalah serupa dengan perhitungan desain. Kapasitas air bersihsebenarnya 26,7 l/menit dan kapasitas berdasarkan perhitungan adalah 25,12 l/min. Sementara air minum adalahkapasitas 10,3 l/menit dan kapasitas berdasarkan perhitungan adalah 16,60 l/min. Air bersih telah lulus air bersihstandar tetapi tidak dapat digunakan sebagai air minum, dan setelah melalui proses osmosis terbalik (RO), dapatdigunakan sebagai air minum.