Tania Surya Utami
Departemen Teknik Kimia, Fakultas Teknik, Universitas Indonesia, Depok 16424, Indonesia

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MODEL ADSORPSI LANGMUIR GAS DINITROGEN MONOKSIDA DALAM SISTEM BIOFILTER DENGAN MEDIUM PUPUK KOMPOS Utami, Tania Surya; Simanjuntak, Josia; Hermansyah, Heri; Nasikin, Mohamad
REAKTOR Volume 13, Nomor 3, Juni 2011
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.13.3.172-177

Abstract

 LANGMUIR ADSORPTION MODEL FOR DINITROGEN MONOXIDE IN BIOFILTER SYSTEM USING COMPOST FERTILIZER MEDIUM. Nitrous oxide (N2O) is mostly emitted from various industrial processes and agricultural activities. This gas causes serious environmental problems and is considered as a dangerous pollutant. In the past, traditional control technologies, such as Selective Catalytic Reduction (SCR) and Selective Non-Catalytic Reduction (SNCR), were applied to control N2O emissions in some industries. However, these two processes required high temperatures and the use of catalysts. Economic and technical constraints in SCR and SNCR methods motivated researchers to develop new, cost-effective processes to remove N2O. Biofiltration is an emerging technology that offers a number of advantages over traditional methods of air pollution control. The purpose of this research is to modelise the biofiltration experimental results into the Langmuir adsorption model. This research is conducted in laboratory scale biofilter column, with parameters studied are effect of biofilter length and N2O gas flowrate. The result of the model is simulated into sensitivity analysis. The average Langmuir constant obtained in the model of the research is 16.006 liter/mol. Dinitrogen Monoksida (N2O) merupakan emisi dari proses industri dan kegiatan pertanian. Gas tersebut merupakan gas polutan berbahaya dan menyebabkan masalah lingkungan yang serius. Sebelumnya, teknologi kontrol tradisional seperti Selective Catalytic Reduction (SCR) dan Selective Non-Catalytic Reduction (SNCR) digunakan untuk mengontrol emisi N2O pada kegiatan-kegiatan industri. Akan tetapi, kedua proses ini membutuhkan suhu yang tinggi dan penggunaan katalis. Adanya masalah dari segi ekonomi dan teknis memotivasi peneliti untuk mengembangkan teknologi baru yang lebih murah dan efisien untuk menghilangkan N2O dari gas buangan. Pengolahan N2O secara biologis dalam proses biofiltrasi adalah salah satu alternatif ramah lingkungan yang dapat digunakan dalam pengelolaan emisi industri. Penelitian ini bertujuan untuk menggambarkan hasil biofiltrasi gas N2O dengan medium pupuk kompos dalam bentuk model adsorpsi Langmuir. Penelitian dilakukan dalam kolom biofilter skala laboratorium, dan parameter-parameter yang diteliti adalah pengaruh dari ketinggian biofilter dan laju alir gas N2O. Hasil dari pemodelan kemudian disimulasikan dalam analisis sensitivitas. Nilai konstanta Langmuir rata-rata yang didapatkan dari pemodelan penelitian ini adalah 16,006 liter/mol.
EVALUASI PRODUKSI LISTRIK SUMBER ENERGI TERBARUKAN SEL ELEKTROKIMIA BERBASIS MIKROBA PADA VOLUME REAKTOR YANG BERBEDA Utami, Tania Surya; Arbianti, Rita; Mulyana, Guruh Mehra
Prosiding Semnastek PROSIDING SEMNASTEK 2017
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (485.922 KB)

Abstract

Microbial Fuel Cell (MFC) merupakan salah satu teknologi yang dikembangkan untuk mendapatkan sumber energi terbarukan. MFC berupa sel elektrokimia yang menghasilkan listrik akibat aktivitas mikroba yang mendegradasi senyawa organik. Untuk menentukan apakah MFC dapat diaplikasikan menjadi teknologi praktis, dilakukan evaluasi melalui parameter kinetika berbasis Monod dan efisiensi coulomb serta efisiensi energi. Penelitian ini menggunakan reaktor tubular single chamber membranless dengan volume 0,5 L dan 5 L. Fokus penelitian ini adalah untuk mengevaluasi pengaruh peningkatan volume reaktor terhadap parameter kinetika dan efisiensi sistem. Data hasil percobaan di laboratorium berhasil dimodelkan dengan persamaan Monod. Nilai parameter kinetika untuk sistem MFC dengan volume 0,5 L adalah Pmax 0,032 mW/m2 dan Ks 772,98 mg/L, sedangkan untuk reaktor 5 L nilai Pmax sebesar 1,59 mW/m2 dan Ks 399,97 mg/L. Nilai efisiensi coulomb tertinggi untuk reaktor 0,5 L adalah sebesar 0,435% dan 2,84% untuk reaktor 5 L. Nilai efisiensi energi tertinggi pada sistem MFC adalah 0,015% dengan reaktor 5 L. Hasil penelitian menunjukkan peningkatan nilai parameter kinetika dan nilai efisiensi pada peningkatan volume reaktor dari 0,5 L ke 5 L. Peningkatan yang terjadi cukup signifikan, pada parameter Pmax terjadi peningkatan hingga 50 kali lipat.
Kinetic Model For Triglyceride Hydrolysis Using Lipase:Review Hermansyah, Heri; Wijanarko, Anondho; Dianursanti, Dianursanti; Gozan, Misri; Wulan, Praswasti P. D.K; Arbianti, Rita; Soemantojo, Roekmijati W.; Utami, Tania Surya; Yuliusman, Yuliusman; Kubo, Momoji; Shibasaki-Kitakawa, Naomi; Yonemoto, Toshiy
Makara Journal of Technology Vol 11, No 1 (2007)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.7454/mst.v11i1.124

Abstract

Triglyceride hydrolysis using lipase has been proposed as a novel method to produce raw materials in food and cosmetic industries such as diacylglycerol, monoacylglycerol, glycerol and fatty acid. In order to design a reactor for utilizing this reaction on industrial scale, constructing a kinetic model is important. Since the substrates are oil and water, the hydrolysis takes place at oil-water interface. Furthermore, the triglyceride has three ester bonds, so that the hydrolysis stepwise proceeds. Thus, the reaction mechanism is very complicated. The difference between the interfacial and bulk concentrations of the enzyme, substrates and products, and the interfacial enzymatic reaction mechanism should be considered in the model.
The Effect of Ca Content on CaO-Zeolite on Nitrogen Adsorption Capacity Nasikin, Mohammad; Utami, Tania Surya; Siahaan, Agustina
Makara Journal of Technology Vol 6, No 2 (2002)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.7454/mst.v6i2.47

Abstract

In industry, Ca zeolite is used as nitrogen selective adsorbent with the use of PSA (Pressure Swing Adsorption)/VSA (Vacuum Swing Adsorption) methods. Natural zeolite modified to be Cao-zeolite by ion exchange process using Ca(OH)2. Adsorption test was done on CaO-zeolite with different Ca concentration to understand how its adsorption phenomena on oxygen and nitrogen. Adsorption test has been done for CaO-zeolite with Ca concentration = 0,682%, 0,849% and 1,244% to oxygen and nitrogen with equal concentration seperately. Pressure variation has being done three times (5 minutes long each time) adsorption time to analyze the connection between adsorption time and how many moles of nitrogen and oxygen being adsorbed. Adsorption test showed that there is a limit of Ca concentration to make CaO-zeolite more selective to adsorb nitrogen. CaO-zeolite with Ca concentration . 1,125% adsorb nitrogen more selective than oxygen. Because the nitrogen content in air is four times the oxygen so we can conclude that the air adsorption rate by zeolite will be four times the adsorption rate by oxygen. This differences in adsorption rate will make the use for CaO-zeolite as a oxygen enrichment equipment possible.
Isolation of Methyl Laurate from Coconut Oil as Raw Material for Fatty Alcohol Sulfate Arbianti, Rita; Utami, Tania Surya; Nugroho, Astri
Makara Journal of Technology Vol 12, No 2 (2008)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.7454/mst.v12i2.144

Abstract

Methyl laurate is a raw or base material for many industries, including surfactant industries. In this research, coconut oil (VCO) is transesterified with methanol to produce methyl ester, using NaOH as the catalyst. Methyl laurate is then separated by method based on the difference in melting point. This research focuses at determining the effects of some variables in transesterification on the concentration of produced methyl laurate. The variables are temperature (40 oC, 50 oC, 60 oC, 80 oC), time of transesterification reaction (0,5 hour, 1 hour, 1,5 hours, 2 hours, 3 hours), and the percent weight of the catalyst NaOH (0,5 %, 1 %, 1,5 %, 2 %, 3 %). Research showed the concentration of methyl laurate increased, following the increased temperature, time, and percent weight of catalysts. Optimal conditions were acquired at reaction temperature of 60oC, reaction time of 2 hours, and percent weight of the catalyst NaOH of 2 %. Laurate acid conversionto methyl laurate that yielded from optimal conditions, after the separation based on melting point, was 55,61 %.
Effect of Electrolytes and Microbial Culture toward Electricity Generation Utilizing Tempe Wastewater in Microbial Fuel Cell Utami, Tania Surya
Sriwijaya International Seminar on Energy-Environmental Science and Technology Vol 1, No 1 (2014)
Publisher : Sriwijaya International Seminar on Energy-Environmental Science and Technology

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Abstract

Demand for electricity has become a crucial requirement of Indonesian society. Resources, which generate electrical energy such as fossil fuel, is predicted to run out within the next dozen years. Microbial Fuel Cell is a development of the latest technology that uses microbes to break down a substrate. This activity will cause potential difference and generate electricity. Microbes which generate electricity could be derived from pure culture and mixed culture. In this study, mixed culture of tempe wastewater microbes is used by adding electrolytes variation which are ammonium chloride-potassium chloride, potassium permanganate, and potassium persulfate in a single chamber reactor. The optimum voltage and power density are 62,09 mV and 3,01 mW/m2 when using potassium persulfate. Result of this research are compared to others research which using pure culture of L.bulgaricus by adding electrolytes variation which are potassium ferrycianide and potassium permanganate. In additional, utilization of potassium permanganat in mixed culture of tempe wastewater microbes and pure culture of L.bulgaricus are also compared to each other. The optimum voltage and power density of those comparison are 457 mV and 167,7 mW/m2 when using potassium permanganat in pure culture of L.bulgaricus.
BIOFILTRASI N2O DENGAN MEDIUM FILTER BERBASIS KOMPOS: EVALUASI PARAMETER OPERASI Utami, Tania Surya
Purifikasi Vol 11 No 1 (2010): 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.v11.i1.186

Abstract

Nitrous oxide (N2O) is a pollutant that has to be reduced because it contributes global warming effect of 310 times higher than CO2. On other hand, agricultural sector contributes over 50% of N2O emissions. The objectives of this research were to study the influence of operating parameters such as flow rate, water content, the addition of natural and synthetic nutrients, and Nitrobacter sp. in biofilter, which used compost medium, to the removal efficiency of N2O.  The results showed the best N2O reduction efficiency was 76.9%. This result was obtained at the biofilter with compost medium, which is enriched with synthetic nutrients and inoculated with Nitrobacter sp. This biofilter had a medium height of 50 cm, N2O flowrate of 72 mL/min, and water content of 60%.