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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Indonesian Journal of Chemistry Jurnal Purifikasi Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia ASEAN Journal of Chemical Engineering Makara Journal of Technology Prosiding Seminar Nasional Rekayasa dan Teknologi (TAU SNAR- TEK) JURNAL REKAYASA KIMIA & LINGKUNGAN
Eva Fathul Karamah
Departemen Teknik Kimia, Fakultas Teknik, Universitas Indonesia Depok 16424, Indonesia.
Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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DISINFEKSI BAKTERI ESCHERICHIA COLI MENGGUNAKAN PROSES KAVITASI HIDRODINAMIKA WATER-JET DENGAN KOMBINASI KARBON AKTIF DAN ZEOLIT Dina Isholawati; Eva Fathul Karamah; Zaenal Abidin Zufri; Alif Nuzulul Hidayat
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2014): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 5 2014
Publisher : Prosiding SNST Fakultas Teknik

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Abstract

Karbon aktif dan zeolit sangat banyak kegunaanya terutama dalam hal adsorbsi. Selain kemampuan mengadsorb bahan organik, adsorben ini juga dapat berfungsi sebagai desinfektan. Metode disinfeksi bakteri Escherichia Coli alternative yang potensial salah satunya dengan kavitasi. Kavitasi merupakan fenomena terjadinya pembentukan, pertumbuhan dan hancurnya gelembung mikro dalam cairan. Untuk mengoptimalkan penelitian ini digunakan adsorben karbon aktif dan zeolit dengan variasi  dosis  adsorben. Laju alir disinfeksi9 liter/menitmenunjukkan hasil yang terbaik untuk disinfeksi bakteri Escherichia Coli. Dosis adsorben terbaik yaitu pada dosis 2 gram/liter baik menggunakan karbon aktif maupun zeolit aktif. Penggunaan adsorben tidak membutuhkan biaya yang mahal dan ramah lingkungan sehingga dapat diaplikasikan dalam kehidupan sehari-hari.Hasil penelitian ini menunjukkan laju disinfeksi menggunakan karbon aktif hasilnya lebih bagus dari pada zeolit aktif.Adsorben dianalisis menggunakan karakterisasi Brunauer-Emmett-Teller (BET) Autosorb sebelum dan setelah disinfeksi, hasil presentase mengecilnya luas permukaan karbon aktif dan zeolit aktif adalah 28 % dan 18%. Kata kunci:Disinfeksi, Escherichia Coli, karbon aktif, kavitasi, zeolit aktif.
INTENSIFIKASI PROSES OZONASI FENOL MENGGUNAKAN KAVITASI HIDRODINAMIKA DAN KAVITASI ULTRASONIK Eva Fathul Karamah
Purifikasi Vol 11 No 2 (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.i2.193

Abstract

Phenolic compounds are one of the main and hazardous contaminants in the waste water due to its toxicity, even at low concentration. Several wastewater treatment processes have been tested for reducing phenol concentration. One of the treatment processes is ozonation. However, this process has several problems, namely the small solubility of ozone in water and the low reactivity between ozone and phenol. This problem can be solved by cavitation, a phenomenon of formation, growth, and collapse of microbubbles within a liquid. This research studied the performance of ozonation and cavitation (hydrodynamic and/or ultrasound) for phenol degradation. The combined ozonation/hydrodynamic cavitation/ultrasound cavitation process showed the highest efficiency in phenol degradation, and the lowest residual and off gas ozone concentrations. The phenol removal efficiencies in ozonation/hydrodynamic cavitation/sonication, ozonation/sonication, ozonation/hydrodynamic cavitation and ozonation processes were 56.27%, 46.46%, 26.28%, and 18.63% respectively.
Combination of Ozonation and Adsorption Using Granular Activated Carbon (GAC) for Tofu Industry Wastewater Treatment Eva Fathul Karamah; Ika Putri Adripratiwi; Linggar Anindita
Indonesian Journal of Chemistry Vol 18, No 4 (2018)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (299.578 KB) | DOI: 10.22146/ijc.26724

Abstract

Tofu industry wastewater is one of the environmental pollutants that need more effective treatment. Ozonation and adsorption method is known to have the capability to oxidize organic compound in wastewater. Adsorption is done by using granular activated carbon (GAC) as an adsorbent to increase tofu wastewater degradation process by adsorbing organic materials and increasing production of hydroxyl radical as the main oxidizing agent. This research is carried out to evaluate the performance of ozonation, adsorption, and combination of both in processing tofu wastewater. To evaluate the significance of ozone dosage and amount of GAC used, these variations are varied which are 60, 111, and 155 mg/h of ozone dosage and 50, 75, and 100 g of the amount of GAC used. Parameters of the process are organic substances of tofu wastewater such as COD, TSS, and pH. The measurements are being done using a spectrophotometer, colorimeter, and pH meter. The outcome of this research is to provide an alternative method in the liquid waste treatment of the tofu industry and the processed wastewater to meet the environmental quality standards. The more ozone and the more quantity of GAC used, the higher the quantity of hydroxyl radicals formed. Addition of GAC in the ozonation process results in more than 100% increase in hydroxyl radical production. Combination of ozonation and adsorption is able to remove 377.12 mg/L of COD and 26 mg/L of TSS.
Degradation of Blue KN-R Dye in Batik Effluent by an Advanced Oxidation Process Using a Combination of Ozonation and Hydrodynamic Cavitation Eva Fathul Karamah; Pristi Amalia Nurcahyani
Indonesian Journal of Chemistry Vol 19, No 1 (2019)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (250.392 KB) | DOI: 10.22146/ijc.26733

Abstract

The popularity of batik has been increasing since it was declared as a world cultural heritage by UNESCO in 2009. Correspondingly, the content of textile dyes in textile industry wastewater is also increased. These dyes contain functional groups which make them quite stable in the environment and causes pollution. In this work, degradation of 100 ppm Blue KN-R has been investigated using ozonation, hydrodynamic cavitation, and a combination of the two for 60 min. The three configuration methods were optimized in terms of different operating parameters, namely flowrate, initial pH and dosage of ozone, to obtain the maximum degradation of Blue KN-R. It was found that the highest decolorization level for a single method was 70.16% for the single ozonation process at pH 11 and 156.48 mg/h of ozone and 1.79% for the single hydrodynamic cavitation process at pH 4. The highest decolorization level was 79.39%, achieved by the combination at pH 11 and 156.48 mg/h of ozone. The mineralization level in the form of a percentage of Total Organic Carbon (TOC) removal by ozonation, hydrodynamic cavitation, and their combination was 14.81, 1.85, and 19.9%, respectively. Due to its better performance, degradation of Blue KN-R was conducted by the hybrid method for 120 min, resulting in 92.63% of decolorization and 24.54% of TOC removal. The degree of synergetic decolorization and mineralization was due to the mechanical and chemical effect of hydrodynamic cavitation in increasing ozone solubility and production of hydroxyl radicals. Degradation of batik effluent has been investigated in optimum conditions for 120 min. The color, COD, BOD, and TSS removal were 67.96, 68.72, 66.54, and 79.84%, respectively.
The Effect of Ozone and Zeolite Concentration to the Performance of the Treatment of Wastewater Containing Heavy Metal Using Flotation Process Karamah, Eva Fathul; Bismo, Setijo; Simbolon, Hotdi M.
Makara Journal of Technology Vol. 12, No. 1
Publisher : UI Scholars Hub

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Abstract

The Effect of Ozone and Zeolite Concentration to the Performance of the Treatment of Wastewater Containing Heavy Metal Using Flotation Process. Industrial wastewater which contains heavy metal cannot be disposed to the environment directly, due to its toxicity. In this research, separation of metal from wastewater was conducted by sorptive flotation method, using Lampung natural zeolite as bonding agent. The most common diffuser used in the flotation process is air or oxygen. In this research, ozone is used as diffuser because it is a stronger oxidant and more dissolvable in water than oxygen. Besides, ozone is a coagulant aid and disinfectant. With ozone as diffuser, it is expected that the process become faster with higher efficiency. This research was conducted to determine ozone effectiveness as diffuser, compared with other diffuser, and also to determine optimum concentration and effectiveness of zeolite in flotation of iron, nickel and copper. The research result shows that separation of iron with air diffuser is 90.8%, air-oxygen diffuser is 95.7%, air-ozone (from air) diffuser is 99.7%, and air-ozone (from oxygen) diffuser is 99.7%. Natural zeolite is effective as bonding agent with optimum concentration equal to 2 gram/liter, producing separation percentage for iron equal to 99.70%, copper equal to 88.98% and Nickel equal to 98.46%.
The Effect of Power on Nitrate Synthesis and The Emission Intensities of Reactive Species Using Anodic Plasma Electrolysis Harianingsih Harianingsih; Nelson Saksono; Eva Fathul Karamah; Zainal Zakaria
ASEAN Journal of Chemical Engineering Vol 22, No 2 (2022)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.76790

Abstract

Nitrates are used as fertilizer to fulfill nutrients for plants. Anodic plasma electrolysis technology can be an effective and environmentally friendly solution in nitrogen fixation into nitrate compounds. This research aimed to determine the effect of controlling voltage and power in nitrate synthesis using plasma electrolysis with air as the raw material injected at the anode. The material used is an electrolyte solution of 0.02 M K2SO4, the electrodes used are in the form of tungsten and stainless steel, and a nitrate reagent is used for the nitrate test. The results of the study showed that at 400 W, the optimal rate was 0.8 L men-1 with 1889 mg L-1 of nitrate formed. While at 500 W and 600 W, the optimal rate of 1 L men-1 with nitrate formed was 2213 mg L-1 and 2453 mg L-1. The emission intensities of reactive species N, N2*, N2+,•OH, •H, and •O at an optimal rate of 0.8 L men-1 400 W 700 V in 20139 au, 28540 au, 18023 au, 30863 au, 12547 au, 49800 au. The addition of air injection will increase the oxygen input into the plasma zone, which can produce reactive species •O and nitrogen produces reactive species N, N2*, N2+ forms NO. The formed NO compounds can be oxidized to NO2, and the reaction between NO2 and reactive species •OH forms nitrates. 
Optimasi Pemanfaatan Existing Hot Oil System dari Train Sebelumnya Untuk Menujang Proses Pemanasan Medium Pada Train Baru di Kilang Pengolahan Gas X Dona Novita Umar; Eva Fathul Karamah
Prosiding TAU SNARS-TEK Seminar Nasional Rekayasa dan Teknologi Vol. 1 No. 1 (2019): Prosiding TAU SNAR-TEK Seminar Nasional Rekayasa dan Teknologi 2019
Publisher : Fakultas Teknik dan Teknologi - TANRI ABENG UNIVERSITY

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Abstract

The main processes at the gas processing plant are separation between gas, condensate and water, separation of acid gas (CO2 and H2S), drying of gas and decreasing of Dew point gas. To support the main process, gas processing plants also need utilities such as electricity, heating, gas fuel processing, nitrogen production, water treatment and air treatment. What is discussed in this research is the heating facility for Reboiler. This heating facility is called a hot oil system. The gas processing plant X currently has 2 trains with a design capacity of 310 MMSCFD gas capacity and a condensate capacity design of 13,500 BPD while actual feed gas is higher 352 MMSCFD. The design of the separation of CO2 acid gas is 5% mol and H2S 1000 ppm while the actual concentration of acid in the feed gas is lower, CO2 2% mol and H2S 700 ppm and. Furthermore, in the near future field X will be developed with the addition of gas production of 95 MMSCFD which is planned to be facilitated by the construction of a new train (Train 3). Normally a gas processing train will be equipped with all its supporting facilities, but this research will examine how to optimize the addition of Train 3 by optimizing the utilization of the heating system by existing hot oil system from trains 1 and 2, due to the heat duty capacity of the existing hot oil system is estimated to be excessive and can still facilitate the heating needs of Train 3. The goal will be to save investment costs if this optimization is successfully implemented.
The Application of Catalytic Ozonation Technique using UV and Granular Activated Carbon (GAC) for Eliminating in Waste Phenol, COD, and 1,1,2,2-Tetrachloroethane Ikhsandy, Ferry; Bismo, Setijo; Karamah, Eva Fathul
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 7, No 1 (2022): EDISI MARET 2022
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v7i1.2854

Abstract

Process eliminating compounds of phenol, Chemical Oxygen Demand (COD), and 1,1,2,2-tetrachloroethane using catalytic ozonation technique with catalyst Granular Activated Carbon (GAC) combination with Ultra Violet (UV) light emission performed in this study. This study aimed to obtain the effectiveness of applications catalytic ozonation technique using system configuration Ozone/GAC and Ozone/UV/GAC to eliminate waste phenol 1,1,2,2-tetrachloroethane COD with circulation time (0, 15, 30, 45, 60, and 120 minutes). The wastewater was derived from the wastewater Laboratory of Polyester Industrial in Bogor. The results were analyzed, comprised of COD with Ferrous Ammonium Sulphate (FAS) method, phenol using aminoantipirin method, and 1,1,2,2-tetrachloroethane with Gas Chromatography-Flame Ionization Detector (GC-FID) method. The result of study shown that the configuration of the Ozone/ UV/GAC with an initial concentration of phenol 58,00 mg/L, COD 72,00 mg/L and 1,1,2,2-tetrachloroethane 32,96 mg/L resulted in the percentage of eliminating phenol 57,76%, COD 66,67% and 1,1,2,2-tetrachloroethane 98,74% while the configuration of Ozone/GAC with an initial concentration of phenol 55,00 mg/L, COD 72,00 mg/L and 1,1,2,2-tetrachloroethane 37,70 mg/L resulted in percentage of eliminating phenol 50,91%, COD 55,56% and 1,1,2,2-tetrachloroethane 100%ABSTRAKProses penyisihan senyawa fenol, Chemical Oxygen Demand (COD) dan 1,1,2,2-tetrakloroetana menggunakan teknik ozonasi katalitik dengan katalis Granular Activated Carbon (GAC) yang dikombinasikan dengan emisi sinar Ultra Violet (UV) dilakukan dalam penelitian ini. Tujuan dari penelitian ini untuk memperoleh efektivitas aplikasi teknik ozonasi katalitik menggunakan sistem konfigurasi, yaitu: Ozon/GAC dan Ozon/UV/GAC dalam penyisihan limbah fenol, COD dan 1,1,2,2-tetrakloroetana dengan waktu sirkulasi (0, 15, 30, 45, 60, dan 120 menit). Limbah cair yang digunakan berasal dari limbah cair Laboratorium Industri Polyester di daerah Bogor. Analisis yang dilakukan meliputi analisis COD dengan metode Ferro Ammonium Sulfat (FAS), analisis Fenol dengan menggunakan metode aminoantipirin dan analisis 1,1,2,2-tetrakloroetana dengan metode Gas Chromatography-Flame Ionization Detector (GC-FID). Setelah dilakukan penelitian, diketahui bahwa konfigurasi Ozon/UV/GAC dengan konsentrasi awal fenol 58,00 mg/L, COD 72,00 mg/L dan 1,1,2,2-tetrakloroetana 32,96 mg/L menghasilkan persentase penyisihan senyawa fenol 57,76%, COD 66,67% dan 1,1,2,2-tetrakloroetana 98,74% sedangkan konfigurasi Ozon/GAC dengan konsentrasi awal fenol 55,00 mg/L, COD 72,00 mg/L dan 1,1,2,2-tetrakloroetana 37,70 mg/L menghasilkan persentase penyisihan senyawa fenol 50,91%, COD 55,56% dan 1,1,2,2-tetrakloroetana 100%.
Effect of Corn Cob Cofiring Ratio Variation on Flue Gas Emissions in a 350 MW Coal-Fired Power Plant Pujiyatmoko, Erwin; Karamah, Eva Fathul
Jurnal Rekayasa Kimia & Lingkungan Vol 20, No 2 (2025): Jurnal Rekayasa Kimia & Lingkungan (December, 2025) In Press
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v20i2.46158

Abstract

Coal-fired power plants are major contributors to greenhouse gas (GHG) emissions in Indonesia, particularly carbon dioxide (CO2), sulfur dioxide (SO2), and nitrogen oxides (NOx). This study analyzes the effect of varying corn cob biomass co-firing ratios on emission levels and thermal performance in a 350 MW subcritical coal-fired unit. Real operational data were obtained from both 100% coal combustion and a 5% corn cob co-firing field test, which were then used to calibrate an Aspen Plus V14 simulation model for higher biomass blending scenarios at 10% and 15%. Results show that increasing the biomass ratio reduces CO2 emissions from 307.44 T/h to 261.33 T/h and NOx from 215.03 to 158.15 mg/Nm, due to biomasss lower carbon and nitrogen content. In contrast, SO2 emissions increased from 206.54 to 310.05 mg/Nm at 15% co-firing, likely due to the biomass sulfur content and altered combustion behavior. Thermal efficiency declined as Specific Fuel Consumption (SFC) rose from 0.638 to 0.753 kg/kWh and Net Plant Heat Rate (NPHR) from 3191.25 to 3766.76 kCal/kWh, mainly due to the lower calorific value and higher moisture content of biomass. Although the Basic Production Cost (BPP) increased from Rp 583.80/kWh to Rp 663.48/kWh, it remains below national residential tariffs, ensuring profitability. The findings suggest that corn cob co-firing up to 15% is technically and economically viable, with potential to support Indonesias energy transition and emission reduction goals if supported by appropriate operational and policy frameworks.
Co-Authors Alif Nuzulul Hidayat Dina Isholawati Dona Novita Umar Erwin Pujiyatmoko Ferry Ikhsandy Harianingsih, Harianingsih Ika Putri Adripratiwi Indika Sunarko Linggar Anindita Nelson Saksono Pristi Amalia Nurcahyani Setijo Bismo Simbolon, Hotdi M. Zaenal Abidin Zufri Zainal Zakaria