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Pengaruh Nozzle Terhadap Aspek Hidrodinamika Kinerja Kolom Gelembung Pancaran Nugroho, Didiek Hari; Adisalamun, Adisalamun; Machdar, Izarul
Jurnal Rekayasa Kimia & Lingkungan Vol 10, No 2 (2014): Jurnal Rekayasa Kimia & Lingkungan
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (29.684 KB) | DOI: 10.23955/rkl.v10i2.2424

Abstract

Kolom gelembung pancaran merupakan salah satu alat perpindahan massa antara fasa gas dan cair. Penelitian ini bermaksud untuk mempelajari pengaruh nozzle terhadap aspek hidrodinamika antara lain: kedalaman penetrasi gelembung (Z), holdup gas (eg), dan laju alir volumetrik gas entrainment (Ql) yang terjadi dalam kolom gelembung pancaran. Variabel proses yang dipelajari antara lain laju alir volumetrik cairan (10-50 L/menit), ukuran diameter nozzle (0,008-0,0127 m), dan tinggi nozzle (0,125-0,25 m). Hasil penelitian memperlihatkan bahwa ukuran diameter nozzle semakin kecil dan laju alir volumetrik cairan yang semakin besar menghasikan laju alir volumetrik gas entrainment, holdup gas, dan kedalaman penetrasi gelembung yang semakin besar.
Use of G3-DHS Bioreactor for Secondary Treatment of Septic Tank Desludging Wastewater Machdar, Izarul; Faisal, Faisal; Muhammad, Syaifullah; Onodera, Takashi; Syutsubo, Kazuaki
Waste Technology Vol 3, No 2 (2015)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (926.258 KB) | DOI: 10.12777/wastech.3.2.41-46

Abstract

Study was done for the use of the third-generation of downflow hanging sponge (G3-DHS) bioreactor for secondary treatment of septic tank desludging wastewater. The main objective of this study was to evaluate the prospective system of G3-DHS bioreactor to be applied in Indonesia. During experiment, the G3-DHS bioreactor kept a relatively high dissolved oxygen concentration under natural aeration. At a relatively short hydraulic retention (HRT) of 3 h, the G3-DHS bioreactor could remove up to 21% (SD 15%) of total COD, 21% (SD = 7%) of filtered-COD, 58% (SD = 24%) of unfiltered-BOD, and 33% (SD = 24%) of ammonium removal. The final effluent had an unfiltered-BOD of only 46 mg.L-1 (SD = 20 mg.L-1) that it was below the Indonesian standard (unfiltered-BOD = 100 mg.L-1) for thresholds of domestic wastewater treatment plants effluent.
CDM Potential in Palm Solid Waste Cogeneration as an Alternative Energy in Aceh Province Mahidin, Mahidin; Machdar, Izarul; Faisal, Muhammad; Nizar, Muhammad
Makara Journal of Technology Vol 16, No 2 (2012)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (124.354 KB) | DOI: 10.7454/mst.v16i2.252

Abstract

Empty Fruit Bunch (EFB) as a solid waste in Crude Palm Oil (CPO) industry does not utilized yet as an alternative energy source to generate electricity. It is well known that use of solid wate (biomass) as an energy source is part of the Clean Development Mechanism (CDM) scheme due to direct reduction of Green House Gases (GHGs) emission and provide a direct contribution to sustainable development. Utilization of EFB as a source of energy is very potential to be implemented in Aceh since this province has 25 CPO Mills at the moment which actively produce about 870,000 ton EFB per year. This study is subjected to evaluate the potency of electricity  from EFB theoretically by using primary data (survey data) and secondary data. Potency of EFB and number of electricity produced from that EFB are estimated using primary data and direct combustion scenario, respectively. Calculation methods for emission reduction acieved are done by AMS-I.D: Renewable electricity generation to the grid and AMS-III.E: Methane emissions avoided from dumping at a solid waste disposal site. The result of this investigation shows that energy consumption in 25 CPO Mills is 45 GW(e)h per year. Evidently, the number of energy/electricity which is potential to be produced by using 75% EFB is 1,047 GWh per year; so that the GHGs emission reduction up to 171,232.21 tCO2e per year.
Use of G3-DHS Bioreactor for Secondary Treatment of Septic Tank Desludging Wastewater Faisal, .; Machdar, Izarul; Muhammad, Syaifullah; Onodera, Takashi; Syutsubo, Kazuaki
Proceedings of The Annual International Conference, Syiah Kuala University - Life Sciences & Engineering Chapter Vol 5, No 1 (2015): Engineering
Publisher : Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (138.889 KB)

Abstract

Study was done for the use of the third-generation of downflow hanging sponge (G3-DHS) bioreactor for secondary treatment of septic tank desludging wastewater. The main objective of this study was to evaluate the prospective system of G3-DHS bioreactor to be applied in Indonesia. During experiment, the G3-DHS bioreactor kept a relatively high dissolved oxygen concentration under natural aeration. At a relatively short hydraulic retention (HRT) of 3 h, the G3-DHS bioreactor could remove up to 21% (SD = 15%) of total COD, 21% (SD = 7%) of filtered-COD, 58% (SD = 24%) of unfiltered-BOD, and 33% (SD = 24%) of ammonium removal. The final effluent had an unfiltered-BOD of only 46 mg/L (SD = 20 mg/L) that it was below the Indonesian standard (unfiltered-BOD = 100 mg/L) for thresholds of domestic wastewater treatment plants effluent.
A NOVEL TREATMENT OF DYE WASTEWATER OF BATIK INDUSTRY BY A COMBINATION OF ALUMINIUM SULFATE AND NATURAL IRON COATED-SAND Machdar, Izarul
Purifikasi Vol 12 No 2 (2011): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v12.i2.199

Abstract

This paper presents the results of dye wastewater treatment of a batik industry in a batch experiment. The experiment was carried out by adding a mixture of aluminium sulfate as coagulant and natural iron oxide-coated sand (NICS) into the wastewater. Sedimentation rate of the formed flock was enhanced by a magnet. Initial COD concentration of the dye wastewater of 1060 mg/L was used in the experiment. Results of this research showed that the efficiency of the dye removal and settling time were affected by iron sand entrapped in the formed flocks. The highest efficiency of COD removal was 95%, or similar to the final COD concentration of 45 mg/L at settling time of 10 minutes. It could be concluded that the combination of aluminium sulfate and NICS could effectively be used in the treatment of the dye wastewater from batik industry.
POTENSI PEMANFAATAN KITOSAN TERMODIFIKASI ASAP CAIR SEBAGAI BAHAN EDIBLE COATING ANTI MIKROBA UNTUK PENGAWETAN DAGING Hanafiah, M.; Faisal, M.; Machdar, Izarul
Jurnal Teknik Kimia USU Vol 7, No 2 (2018)
Publisher : Jurnal Teknik Kimia USU

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (213.389 KB)

Abstract

This research is a preliminary study of the utilization of chitosan modified with liquid smoke to produce edible coating material that can be used as a preservative of beef. Chitosan compounds obtained from shrimp shell waste, while liquid smoke produced from pyrolysis of palm shells at a temperature of 340oC. Edible coating solution with various concentrations was made by dissolving chitosan (1-1.5%) into 3% liquid smoke, which was then applied as a meat preservative. Meat samples that have been dipped edible coating for 15 minutes, then stored in the refrigerator and observed decreased endurance every 24 hours for 8 days. Analysis results of Gas Chromatography-Mass Spectrometry (GC-MS) showed that liquid smoke contains phenol and acetic acid compounds that have antimocrobial properties. Meat endurance test was done by analyzing the aroma, texture and color of meat. The results showed that the beef that has been coated liquid chitosan solution can last up to 7 days. Chitosan concentration affects the endurance of meat, the greater the chitosan concentration, the better the meat endurance. The optimum concentration was obtained at 1% of chitosan, the meat still has an acceptable aroma, texture and color for up to 6 days. This suggests that chitosan-liquid smoke can be used as an edible coating material.
AMMONIA REMOVAL BEHAVIOR IN THE DOWNFLOW HANGING SPONGE BIOREACTOR Machdar, Izarul
Purifikasi Vol 8 No 2 (2007): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v8.i2.134

Abstract

Ammonia removal behavior in the DHS has been studied extensively including apply a DO microelectrodes and a gold method of microbial identification, i.e. Fluorescence In Situ Hybridization (FISH) approach by means of 16S rRNA-targeted oligonucleotide probes. With the HRT of 2 h, the ammonia removal rate in the bioreactor was achieved 0,24 kgN.m-3.d-1, and nitrogen-losing rate was approximate 0,08 kgN.m-3.d-1.  Moreover, the most important of this system is no requirement external aeration input. FISH of the DHS sludge revealed that nitrifiers could be detected with Nso190, NSR1156, or NIT3 probe, form dense clusters, and they mainly settled in the surface region of the heterotrophic aggregates. Ammonia oxidizers and nitrite oxidizers grown in DHS sludge in separated solitary occurrence. Nitrospira spp. were more likely responsible to oxidize of nitrite rather than Nitrobacter spp.
PENGOLAHAN LIMBAH CAIR DARI INDUSTRI BATIK DENGAN KOMBINASI ALUMINIUM SULFAT DAN PASIR BESI ALAMI Machdar, Izarul
Purifikasi Vol 12 No 2 (2011): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v12.i2.81

Abstract

Artikel ini memberikan informasi mengenai pengolahan limbah cair zat warna dari industri batik di dalam suatu sistem batch. Penelitian dilakukan dengan mencampur koagulan alum dan pasir besi alam ke dalam limbah cair zat warna. Laju pengendapan flok yang terbentuk ditingkatkan dengan bantuan magnet. Nilai COD awal dari zat warna yang digunakan dalam eksperimen ini adalah 1060 mg/L. Hasil penelitian menunjukkan bahwa penyisihan zat warna dan waktu pengendapan dipengaruhi oleh penambahan pasir besi ke dalam flok yang terbentuk. Efisiensi penyisihan COD dari limbah zat warna yang paling tinggi diperoleh sekitar 95%, atau setara dengan konsentrasi akhir COD sebesar 45 mg/L, dengan waktu pengendapan 10 menit. Dari hasil ini dapat disimpulkan bahwa, kombinasi aluminium sulfat dan pasir besi alami dapat digunakan di dalam pengolahan limbah cair zat warna dari industri batik.
CHROMIUM AND LEAD REMOVAL USING SYNTHESIZED NANOCRYSTALLINE ZEOLITE Machdar, Izarul
Purifikasi Vol 10 No 1 (2009): Jurnal Purifikasi
Publisher : Department of Environmental Engineering-Faculty of Civil, Environmental and Geo Engineering. Institut Teknologi Sepuluh Nopember, Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25983806.v10.i1.162

Abstract

Zeolite Y nanocrystal was synthesized from a clear solution at temperature of 80-1500C with 6.38 of Si/Al molar ratio by using Aluminum isopropoxide (Al(OiPr)3)  and Ludox LS as alumina and silica source, Tetrametylammonium Hidroxide (TMAOH) and Tetrametylammonium Bromide (TMABr) as first and second organic template, respectively. The products were characterised by X-Ray Diffractometer (XRD) and Scanning Electron Microscopy (SEM) to identify the structure and particle sizes. The image measurements of the particle size record that the average particle sizes of FAU-5, FAU-20 and FAU-35 are 116.46 nm, 169.33 nm and 178.12 nm, respectively. Furthermore, 0.5988 g and 0.6001 g of yields with average particle sizes of 116.46 nm and 43.76 nm can be obtained for FAU-5 (single organic template) and FAU-10 (two organic template, TMABr/TMAOH=0.15) samples, respectively. The smallest average particle size observed is 33.87 nm (FAU-15). The synthesised nanocrystalline zeolite Y was applied for Pb(II) and Cr(III) removal and the results show that the nano crystal samples have very good performance. On FAU-37 at 10 ppm, 30 ppm, 50 ppm and 80 ppm of initial concentration, the adsorption of Pb is 23.56 mg/g, 109.71 mg/g, 181.02 mg/g and 231.46 mg/g, respectively at 216 h and adsorption capacities of Cr are 23.18 mg/g, 84.94 mg/g, 109.75 mg/g and 147.37 mg/g.
Penilaian Kondisi Akustik Di Dalam Ruang Kelas Melalui Program Simulasi Odeon 5.0 (Studi Kasus: SMP Negeri 4 Banda Aceh) Mardiana, Rosa; Arifin, Bastian; Machdar, Izarul
Jurnal Serambi Engineering Vol 3, No 1 (2018)
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.933 KB)

Abstract

School is one of areas that must be controlled by noise level. In accordance with the quality standards of noise level at the school or educational institution is 55 dB. The school conditions polluted air pollution will affect the comfort and ultimately student in learning process and give bad effect for the students’ achievement concentration decreases. The aim of the research is to analyze noise level and see composite materials to reduce noise levels through computer simulation approach. Parameter acoustic test in the noisy background (Background of Noise), Sound Pressure Level Distribution, Time buzz, Speech Transmission Index (STI) and Insulation. The sample of this research is in SMPN 4 Banda Aceh. Based on the data obtained, it is found that the noise levels at the site beyond the expiry of the quality standards required that at one point in the school yard around 76.8 dB, point 2 in classrooms around 66.1 dB and point 3 outside of school grounds around 77.7 dB. Based on simulation results for Clarity / C80 superior to the material to 3, for reverberation time and decay (D50 and T30) superior to the material to 4th and 5th, while for clarity conversation / STI all the ingredients fit in either category.