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All Journal Reaktor IPTEK Journal of Proceedings Series ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika CHEESA: Chemical Engineering Research Articles Jurnal Rekayasa Hijau Journal of Fundamentals and Applications of Chemical Engineering
Pratiwi, Vibianti Dwi
Jurusan Teknik Kimia, Fakultas Teknologi Industri ITENAS, Bandung
Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology

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Analisis Pengaruh Konsentrasi Asam dan Basa terhadap Recovery Tembaga (Cu) dari Limbah Elektronika -, Salafudin; Kamal, Netty; Pratiwi, Vibianti Dwi
Jurnal Rekayasa Hijau Vol 3, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Institut Teknologi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (355.364 KB) | DOI: 10.26760/jrh.v3i1.2819

Abstract

ABSTRAKPenangan limbah elektronika dengan cara recycle dapat menjadi sumber alternatif untuk mendapatkan material yang bernilai. Salah satu komponen utama dalam pembuatan peralatan elektronika adalah PCB. Printed Circuit Board (PCB) mengandung banyak material logam yang berharga seperti tembaga (Cu) sekitar 25% b/b. Dari segi ekonomi maupun kebutuhan pasar, material tembaga layak untuk di recovery. Salah satu cara recovery tembaga dari PCB limbah elektronika adalah dengan proses hidrometalurgi. Pada proses ini PCB direaksikan dengan larutan asam kuat seperti HNO3 sehingga membentuk Cu(NO3)2. Parameter yang digunakan adalah konsentrasi perolehan tembaga, sedangkan variabel yang berubah pada penelitian ini adalah konsentrasi HNO3, NaOH dan jenis PCB sebagai limbah elektronika. Konsentrasi tembaga yang dihasilkan dalam percobaan ini dicari menggunakan metode AAS (Atomic Absorption Spectroscopy). Hasil yang didapatkan dihitung menggunakan Anova dengan software Minitab 17 untuk melihat pengaruh konsentrasi asam dan basa terhadap jenis PCB limbah elektronika. Berdasarkan hasil perhitungan menggunakan anova dengan Minitab 17 didapatkan pengaruh HNO3 7N pada waktu percobaan 60 menit lebih signifikan dalam mendaur-ulang tembaga dari PCB televisi.Kata Kunci: Limbah Elektronik, PCB, Tembaga, MinitabABSTRACTHandling of electronic waste by recycle can be an alternative source for obtaining valuable material. One of the main components in making electronic equipment is PCB. Printed Circuit Board (PCB) contains many valuable metal materials such as copper (Cu) around 25% b / b. In terms of economy and market needs, copper material is suitable for recovery. One method of copper recovery from PCB electronic waste is the hydrometallurgical process. In this process the PCB is reacted with a strong acid solution such as HNO3 to form Cu(NO3)2. The parameters used were the concentration of copper recovery, while the variable that changed in this study was the concentration of HNO3, NaOH and PCB type as electronic waste. The concentration of copper produced in this experiment was sought using the AAS method (Atomic Absorption Spectroscopy). The results obtained were calculated using Anova with Minitab 17 software to see the effect of acid and base concentrations on the type of electronic waste PCB. Based on the calculation results using Anova by Minitab 17, the influence of the HNO3 7N on the 60 minute was found to be more significant in recycling copper from a television PCB.Keywords: Electronic Waste, PCB, Copper, Minitab
Analisis Pengaruh Waktu Aktivasi dan Adsorpsi dalam Pemanfaatan Karbon Aktif dari Serutan Kayu menjadi Adsorben Limbah Cair Pratiwi, Vibianti Dwi; Kamal, Netty; Juhanda, Suparman
Jurnal Rekayasa Hijau Vol 3, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Institut Teknologi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (824.195 KB) | DOI: 10.26760/jrh.v3i1.2822

Abstract

ABSTRAKIndustri pemanfaatan kayu cukup sering ditemukan di Indonesia, namun limbah yang dihasilkan tidak diolah dan hanya dibuang ke lingkungan. Limbah serutan kayu yang mengandung rantai karbon dapat dimanfaatkan menjadi karbon aktif. Pengaruh kualitas karbon aktif dari serutan kayu ini diuji berdasarkan waktu aktivasi dan daya adsorpsi limbah cair. Karbon aktif dibuat melalui pirolisis hingga mencapai suhu 5000C dengan ukuran 100-150 mesh dan diaktivasi dengan H3PO4 10% selama 6 jam, 12 jam, dan 18 jam. Karbon aktif yang dihasilkan digunakan sebagai adsorben dan diujikan pada limbah cair zat warna tekstil Sumikaron Yellow Brown S-2RL. Adsorpsi dilakukan dengan variasi waktu 1 jam, 2 jam dan 3 jam. Selanjutnya larutan zat warna yang telah dijerap oleh karbon aktif dianalisa menggunakan spektrofotometer dengan panjang gelombang 480nm. Berdasarkan absorbansi atau konsentrasi (%) pengurangan warna yang dihitung menggunakan anova dengan software Minitab 17, pengaruh yang lebih signifikan dalam pemanfaatan karbon aktif dari serutan kayu yaitu pada waktu aktivasi 12 jam dan waktu adsorpsi 3 jam. Karbon aktif dari limbah serutan kayu mampu mengurangi limbah cair zat warna sebesar 98,2519%. Hasil uji pendahuluan dengan menghitung bilangan iod dari adsorben karbon aktif yang telah diaktivasi selama 12 jam menjadi kondisi terbaik dengan menjerap iod sebanyak 144,8961 mg/g.Kata Kunci: limbah cair, karbon aktif, serutan kayu, MinitabABSTRACTThe wood utilization industry is quite often found in Indonesia, but the waste produced is not processed and is only disposed of into the environment. Wood shavings containing carbon chains can be used as activated carbon. The effect of the quality of activated carbon from wood shavings was tested based on the activation time and adsorption liquid waste’s capacity. Activated carbon is made through pyrolysis to reach a temperature of 5000C with a size of 100-150 mesh and activated with 10% H3PO4 for 6 hours, 12 hours, and 18 hours. The activated carbon produced was used as an adsorbent and tested on the liquid waste of textile dye Sumikaron Yellow Brown S-2RL. Adsorption is carried out with variations of 1 hour, 2 hours and 3 hours. Furthermore, the dye solution that has been absorbed by activated carbon is analyzed using a spectrophotometer with a wavelength of 480nm. Based on the absorbance or concentration (%) of color reduction calculated using anova with Minitab 17 software, a more significant effect on the utilization of activated carbon from wood shavings is the activation time of 12 hours and the adsorption time of 3 hours. Activated carbon from wood shavings waste is able to reduce dye wastewater by 98.2519%. The results of the preliminary test by calculating iodine number from the adsorbent of activated carbon which has been activated for 12 hours are the best conditions by absorbing iodine is 144.8961 mg/g.Keywords: liquid waste, activated carbon, wood shavings, Minitab
Simulation of Hydrogen Purification using Two Bed System Pressure Swing Adsorption Pratiwi, Vibianti Dwi; Juwari, Juwari; Handogo, Renanto
IPTEK Journal of Proceedings Series No 2 (2017): The 2nd Internasional Seminar on Science and Technology (ISST) 2016
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (523.617 KB) | DOI: 10.12962/j23546026.y2017i2.2272

Abstract

Hydrogen has various functions in chemical industries, as an agent of organic compounds synthesis, a reactant in hydrocracking, hydroalkelation, and hydrodesulfurization process in petrochemical industry, a reactant in hydrogenated fat process, a reductant agent in material industry, methanol production, silicon manufacture. Therefore, hydrogen purification is very important process for the industry processes. Pressure Swing Adsorption (PSA) is commonly used hydrogen purification process. Different utility used for hydrogen purification using PSA will change adsorbent’s capacity and pressure to separate the mixture of gas into desirable components. In this study, pressure is varied from 2 to 10 bar and adsorbents are used silica gel and activated carbon. Hydrogen purification using two beds system PSA is simulated using Aspen Adsorption software. Based on the simulation result, it can be concluded that the pressure that gives most steady system is at 7 bar, which produces 99,92 % hydrogen purity using activated carbon in bed 1 and silica gel in bed 2.
Analisis Pengaruh Konsentrasi Asam dan Basa terhadap Recovery Tembaga (Cu) dari Limbah Elektronika Salafudin -; Netty Kamal; Vibianti Dwi Pratiwi
Rekayasa Hijau : Jurnal Teknologi Ramah Lingkungan Vol 3, No 1 (2019)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/jrh.v3i1.2819

Abstract

ABSTRAKPenangan limbah elektronika dengan cara recycle dapat menjadi sumber alternatif untuk mendapatkan material yang bernilai. Salah satu komponen utama dalam pembuatan peralatan elektronika adalah PCB. Printed Circuit Board (PCB) mengandung banyak material logam yang berharga seperti tembaga (Cu) sekitar 25% b/b. Dari segi ekonomi maupun kebutuhan pasar, material tembaga layak untuk di recovery. Salah satu cara recovery tembaga dari PCB limbah elektronika adalah dengan proses hidrometalurgi. Pada proses ini PCB direaksikan dengan larutan asam kuat seperti HNO3 sehingga membentuk Cu(NO3)2. Parameter yang digunakan adalah konsentrasi perolehan tembaga, sedangkan variabel yang berubah pada penelitian ini adalah konsentrasi HNO3, NaOH dan jenis PCB sebagai limbah elektronika. Konsentrasi tembaga yang dihasilkan dalam percobaan ini dicari menggunakan metode AAS (Atomic Absorption Spectroscopy). Hasil yang didapatkan dihitung menggunakan Anova dengan software Minitab 17 untuk melihat pengaruh konsentrasi asam dan basa terhadap jenis PCB limbah elektronika. Berdasarkan hasil perhitungan menggunakan anova dengan Minitab 17 didapatkan pengaruh HNO3 7N pada waktu percobaan 60 menit lebih signifikan dalam mendaur-ulang tembaga dari PCB televisi.Kata Kunci: Limbah Elektronik, PCB, Tembaga, MinitabABSTRACTHandling of electronic waste by recycle can be an alternative source for obtaining valuable material. One of the main components in making electronic equipment is PCB. Printed Circuit Board (PCB) contains many valuable metal materials such as copper (Cu) around 25% b / b. In terms of economy and market needs, copper material is suitable for recovery. One method of copper recovery from PCB electronic waste is the hydrometallurgical process. In this process the PCB is reacted with a strong acid solution such as HNO3 to form Cu(NO3)2. The parameters used were the concentration of copper recovery, while the variable that changed in this study was the concentration of HNO3, NaOH and PCB type as electronic waste. The concentration of copper produced in this experiment was sought using the AAS method (Atomic Absorption Spectroscopy). The results obtained were calculated using Anova with Minitab 17 software to see the effect of acid and base concentrations on the type of electronic waste PCB. Based on the calculation results using Anova by Minitab 17, the influence of the HNO3 7N on the 60 minute was found to be more significant in recycling copper from a television PCB.Keywords: Electronic Waste, PCB, Copper, Minitab
Analisis Pengaruh Waktu Aktivasi dan Adsorpsi dalam Pemanfaatan Karbon Aktif dari Serutan Kayu menjadi Adsorben Limbah Cair Vibianti Dwi Pratiwi; Netty Kamal; Suparman Juhanda
Rekayasa Hijau : Jurnal Teknologi Ramah Lingkungan Vol 3, No 1 (2019)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/jrh.v3i1.2822

Abstract

ABSTRAKIndustri pemanfaatan kayu cukup sering ditemukan di Indonesia, namun limbah yang dihasilkan tidak diolah dan hanya dibuang ke lingkungan. Limbah serutan kayu yang mengandung rantai karbon dapat dimanfaatkan menjadi karbon aktif. Pengaruh kualitas karbon aktif dari serutan kayu ini diuji berdasarkan waktu aktivasi dan daya adsorpsi limbah cair. Karbon aktif dibuat melalui pirolisis hingga mencapai suhu 5000C dengan ukuran 100-150 mesh dan diaktivasi dengan H3PO4 10% selama 6 jam, 12 jam, dan 18 jam. Karbon aktif yang dihasilkan digunakan sebagai adsorben dan diujikan pada limbah cair zat warna tekstil Sumikaron Yellow Brown S-2RL. Adsorpsi dilakukan dengan variasi waktu 1 jam, 2 jam dan 3 jam. Selanjutnya larutan zat warna yang telah dijerap oleh karbon aktif dianalisa menggunakan spektrofotometer dengan panjang gelombang 480nm. Berdasarkan absorbansi atau konsentrasi (%) pengurangan warna yang dihitung menggunakan anova dengan software Minitab 17, pengaruh yang lebih signifikan dalam pemanfaatan karbon aktif dari serutan kayu yaitu pada waktu aktivasi 12 jam dan waktu adsorpsi 3 jam. Karbon aktif dari limbah serutan kayu mampu mengurangi limbah cair zat warna sebesar 98,2519%. Hasil uji pendahuluan dengan menghitung bilangan iod dari adsorben karbon aktif yang telah diaktivasi selama 12 jam menjadi kondisi terbaik dengan menjerap iod sebanyak 144,8961 mg/g.Kata Kunci: limbah cair, karbon aktif, serutan kayu, MinitabABSTRACTThe wood utilization industry is quite often found in Indonesia, but the waste produced is not processed and is only disposed of into the environment. Wood shavings containing carbon chains can be used as activated carbon. The effect of the quality of activated carbon from wood shavings was tested based on the activation time and adsorption liquid waste’s capacity. Activated carbon is made through pyrolysis to reach a temperature of 5000C with a size of 100-150 mesh and activated with 10% H3PO4 for 6 hours, 12 hours, and 18 hours. The activated carbon produced was used as an adsorbent and tested on the liquid waste of textile dye Sumikaron Yellow Brown S-2RL. Adsorption is carried out with variations of 1 hour, 2 hours and 3 hours. Furthermore, the dye solution that has been absorbed by activated carbon is analyzed using a spectrophotometer with a wavelength of 480nm. Based on the absorbance or concentration (%) of color reduction calculated using anova with Minitab 17 software, a more significant effect on the utilization of activated carbon from wood shavings is the activation time of 12 hours and the adsorption time of 3 hours. Activated carbon from wood shavings waste is able to reduce dye wastewater by 98.2519%. The results of the preliminary test by calculating iodine number from the adsorbent of activated carbon which has been activated for 12 hours are the best conditions by absorbing iodine is 144.8961 mg/g.Keywords: liquid waste, activated carbon, wood shavings, Minitab
Redesign of Boiler Heat Recovery Steam Generator (HRSG) on The Utilization of Waste Gas in The Cement Industry Fiqri Hadi Hendriyansyah; Rifania Nendry W.P.; Vibianti Dwi Pratiwi
Reaktor Volume 23 No.1 April 2023
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.1.1.16-20

Abstract

Approximately, 20%-50% of the total energy consumption during cement production is disposed of unintendedly as waste heat. This is very unfortunate considering that this waste heat still has the energy that can be further utilized. The heat recovery steam generator (HRSG) boiler system is one of widely used solutions in the chemical industry process to save operating costs in the chemical industry process. The purpose of this research is to determine the amount of energy that can be saved by implementing the HRSG system under ideal operating conditions. Based on the simulation results, the HRSG boiler design can produce steam with a temperature of 235°C and subsequently reduce the flue gas temperature from 244°C to 140.6°C. The HRSG system produces energy in the power turbine up to 1,756 kW with total energy exchanged in the system of 17,567.38 kW from the total energy in the flue gas of 20,693.96 kW and provides an overall efficiency of 84.61% at steady state conditions.Keywords: Aspen HYSYS, Waste Heat, Heat Recovery Steam Generator (HRSG)
Evaluation Batch Process Scheduling for Single Campaign in FMCG Industry Anugraha, Rendra Panca; Tirtadinata, Jacqueline; Hansell, Delvin Theodorus; Rahayu, Sisilia Kusuma; Sari, Anggraeni Puspita; Arifin, Rizal; Pratiwi, Vibianti Dwi; Handogo, Renanto
Journal of Fundamentals and Applications of Chemical Engineering Vol 4, No 2 (2023)
Publisher : LPPM, Institut Teknologi Sepuluh Nopember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2964710X.v4i2.19322

Abstract

The Fast-Moving Consumer Goods (FMCG) sector plays a pivotal role in meeting daily consumer requirements. Efficient manufacturing and revenue generation are of paramount importance. The industry adopts a batch-processing approach to maintain adaptability and responsiveness to evolving market needs. A critical element in this process is the evaluation of batch scheduling, especially the batch cycle time of the products, a key factor with a substantial impact on production efficiency and profitability. This research delves deep into the complexities of batch scheduling methods between overlapping batches and parallel units for limiting steps, especially single-product campaigns in terms of its benefit towards production efficiency and company profitability. In the end, it illustrates the consequences of optimal scheduling on production time and income, highlighting the potential for significant improvements or downwards within the applied method through sensitivity analysis, which could give the FMCG industry more careful consideration in strategizing its future planning production
Pengaruh Suhu dan Jenis Perekat Terhadap Kualitas Biobriket dari Ampas Kopi dengan Metode Torefaksi Pratiwi, Vibianti Dwi; Mukhaimin, Iman
CHEESA: Chemical Engineering Research Articles Vol. 4 No. 1 (2021)
Publisher : Universitas PGRI Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25273/cheesa.v4i1.7697.39-50

Abstract

Penggunaan energi biomassa sebagai sumber energi alternatif terbarukan diupayakan untuk mengurangi emisi CO2. Ampas kopi merupakan limbah biomassa yang dihasilkan dari proses produksi yang digunakan sebagai raw material dalam pembuatan biobriket. Limbah biomassa mempunyai calorific value yang relatif tinggi jika diolah menjadi biobriket dengan perekat. Jenis perekat yang digunakan adalah tepung tapioka dan getah pinus dengan komposisi tepung tapioka yang digunakan 0%, 10% dan 20% sedangkan jumlah perekat getah pinus 0%, 10%, 20%, dan 40%. Dengan mengetahui pengaruh jenis dan jumlah perekat dalam pembuatan biobriket menggunakan metode torefaksi, diharapkan limbah ampas kopi dapat menjadi biomassa sebagai energi alternatif. Penelitian dilakukan pada suhu torefaksi yaitu 200 oC, 250 oC dan 300 oC. Suhu torefaksi yang optimal untuk pembuatan biobriket dari ampas kopi adalah 300 oC dengan perekat getah pinus 40% yang menghasilkan biobriket lebih padat dan tidak mudah hancur dengan nilai kalori sebesar 6124 kal/gr.
Effect of Burning Temperature on The Quality of Alternatife Bio-energy from Coffee Waste PRATIWI, VIBIANTI DWI
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 8, No 3: Published September 2020
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v8i3.615

Abstract

ABSTRAKSumber daya energi terbarukan alternatif, seperti biobriket dari biomassa atau limbah organik, dapat menjadi solusi untuk masalah ini. Limbah kopi merupakan limbah yang dihasilkan dalam proses produksi, limbah biomassa ini berpotensi untuk digunakan sebagai bahan baku pembuatan biobriket karena memiliki nilai kalor yang cukup tinggi. Briket arang bio adalah arang gumpalan atau batang yang dibuat dari limbah organik yang telah dicetak sedemikian rupa dengan kekuatan tekanan tertentu dan dicampur dengan bahan perekat seperti tepung tapioka. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh suhu pirolisis dalam produksi briket dari limbah kopi. Suhu pirolisis yang akan digunakan: 200oC, 250oC, 300oC, 400oC dan 500oC. Selain itu, briket akan terdeteksi kadar air, kadar abu, dan nilai kalor. Briket terbaik dari ampas kopi ditemukan pada suhu pembakaran 300oC tanpa perekat dengan nilai kalor 7549,42 kal/gram dan dapat menghasilkan daya listrik sebesar 292,49 W. Namun, briket ini menghasilkan kadar abu tak terduga sebesar 3,7% yang masih di bawah standar SNI 01-6235-2000.Kata kunci: Bahan Bakar Alternatif, Ampas Kopi, Briket, Pirolisis ABSTRACTAlternative renewable energy resources, such as biobriquette from biomass or organic wastes, can be a solution for this problem. Coffee waste is a waste generated in the production process, this biomass waste is potential to be used as raw material for making biobriquette because it has a high enough calorific value. Bio charcoal briquettes are clots or rods charcoal that made from organic wastes which has been molded in such a way with a certain force of pressure and mixed with adhesive materials such as tapioca starch. The purpose of the study is to determine the effect of pyrolysis temperature in the production of briquettes from coffee waste. Based on several literature studies, the pyrolysis temperatures which are going to be used: 200oC, 250oC, 300oC,  400oC and 500oC. In addition, the briquette will be detected the water content, ash content, and caloric value. The best briquettes from coffee grounds are found at a combustion temperature of 300oC without adhesive with a heating value of 7549.42 cal/gram and can produce electrical power of 292,49 W. However, this briquette produces unexpected ash content of 3.7% which is still below to SNI 01-6235-2000 standards.Keywords: Alternative Energy, Biofuel, Briquettes, Coffee Waste, Pyrolysis
Co-Authors Aminuyati Anugraha, Rendra Panca Arifin, Rizal Fiqri Hadi Hendriyansyah Handogo, Renanto Hansell, Delvin Theodorus Juhanda, Suparman Kamal, Netty Mukhaimin, Iman Netty Kamal Netty Kamal Rahayu, Sisilia Kusuma Renanto Handogo Rifania Nendry W.P. Salafudin - Salafudin - Sari, Anggraeni Puspita Suparman Juhanda Tirtadinata, Jacqueline