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All Journal ASEAN Journal of Systems Engineering Jurnal Rekayasa Proses Reaktor Jurnal Bahan Alam Terbarukan Bulletin of Chemical Reaction Engineering & Catalysis Seminar Nasional Teknik Kimia Kejuangan ROTOR: JURNAL ILMIAH TEKNIK MESIN Konversi Jurnal Penelitian Karet Jurnal Rekayasa Proses Jurnal Teknologi Jurnal Inovasi Teknik Kimia Jurnal Teknik Kimia Indonesia Envirotek : Jurnal Ilmiah Teknik Lingkungan Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Rekayasa Proses Journal of Engineering and Technological Sciences
Muslikhin Hidayat
Departemen Teknik Kimia, Fakultas Teknik, Universitas Gadjah Mada
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Pemanfaatan Membran Selulosa Bakteri dari Limbah Kulit Pisang sebagai Matriks Masker Antioksidan Wibowo, Claudia Shinta Octa; Hidayat, Muslikhin; Sulistyo, Hary
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Banana skins have several potential applications in the health and beauty industries. Through a fermentation process with the help of Acetobacter xylinum, it produces banana skin bacterial cellulose. It is possible to further process this cellulose into a face mask matrix. Bacterial cellulose has biodegradable properties, a low toxicity value, and a good absorption ability to be applied as a face mask matrix. The addition of serum to the mask matrix aims to focus on the function of the formulated matrix. Methods: filtering the sample; making nata de banana skin with different fermentation times; making a matrix mask; matrix mask characterization; and data analysis. The results of the study showed that the variation of different fermentation times can affect the resulting cellulose products. The optimal fermentation time for producing nata was 10 days, resulting in a thickness of 0.92 cm. Then, the evaluation tensile strength test on the mask matrix revealed the highest value was also a 10-day fermentation variation, 3.000–10.000 kg/cm2. And last, the best test of the release of vitamin C is the 10-day fermentation variation.
Optimalisasi Regenerasi Dan Pemakaian Kembali Karbon Aktif Untuk Pemungutan Krom Dari Limbah Penyamakan Kulit Rahayu, Neni; Wintoko, Joko; Hidayat, Muslikhin
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

In the wastewater treatment of leather tanning processes, commercial activated carbon from palm shells is usually used as an adsorbent. Therefore, a study is needed to evaluate the effectiveness of activated carbon that has been repeatedly regenerated and used as a total chromium adsorbent medium in wastewater. This study aims to examine the leaching process that uses acids and bases to analyze the adsorption and regeneration processes of activated carbon. Adsorption time variations of 30 minutes, 60 minutes, 90 minutes, and 120 minutes were used to evaluate how activated carbon interacts with wastewater. Then, the effluent was analyzed by Atomic Absorption Spectrophotometry (AAS) to determine the amount of total chromium remaining in the sample. The activated carbon which had been used as an adsorbent was contacted with 0.1 M H2S04 solution for 4 hours and stirred at 400 rpm using a magnetic stirrer to regenerate the surface of the activated carbon. It is neutralized with an alkaline solution. The Freundlich model is used to determine the value of the adsorption equilibrium constant. After testing 5 times, commercial activated carbon can still be used effectively as a adsorbent medium for total chromium (total Cr) repeatedly. Optimum adsorption contact time was 90 minutes. The optimum absorption efficiency during the fifth stage of the adsorption process was 43.93%.
Penurunan Kadar COD Limbah Cair Industri Batik menggunakan Adsorben Nata de Coco Veronika, Chintia; Sulistyo, Hary; Hidayat, Muslikhin
Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri 2023: Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Limbah cair adalah polutan yang tidak terlepaskan dari suatu industri batik, baik industri besar maupun industri kecil. Efek dari limbah yang dihasilkan tentu bisa mengganggu keseimbangan lingkungan. Kandungan limbah batik dengan zat organik seperti COD (Chemical Oxygen Demand) yang tinggi, dapat menyebabkan pencemaran lingkungan. Penelitian ini bertujuan untuk mengetahui kemampuan selulosa bacterial pada limbah padat nata de coco sebagai adsorben limbah cair batik, dan mengetahui kinerja dari adsorben nata de coco dalam menurunkan kandungan COD dalam limbah cair industri batik. Penelitian ini menggunakan variasi massa absorben 0.25, 0.5, 0.75, dan 1 gram, dengan variasi waktu kontak yang digunakan adalah 20, 40, 60, 80, 100, dan 120 menit dan variasi suhu 28°C (tanpa pemanasan), 35°C dan 40°C. Penelitian skala laboratorium ini menggunakan alat refluks yang sederhana. Berdasarkan proses adsorpsi yang dilakukan, efisiensi penyisihan COD terbesar adalah 88.96% dan kapasitas adsorpsi zat kimia organik dalam limbah cair batik sebanyak 8914.36 mg/L yang terjadi pada waktu kontak 60 menit dengan suhu 30°C dan jumlah adsorben yang menghasilkan nilai efisiensi penyisihan tersebut adalah sebesar 0.75 gram.
Studi penambahan etilena glikol dalam menghambat pembentukan metana hidrat pada proses pemurnian gas alam Muslikhin Hidayat; Danang Tri hartanto; Muhammad Mufti Aziz; Sutijan Aziz
Jurnal Rekayasa Proses Vol 14 No 2 (2020): Volume 14, Number 2, 2020
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.59871

Abstract

The gas processing facilities are designed to significantly reduce the impurities such as water vapor, heavy hydrocarbon, carbon dioxide, carbonyl sulfide (COS), benzene-toluene-xylene (BTX), mercaptane, and the sulfur compounds. A small amount of those compounds in natural gas is not preferable since they disturb the next processes. It was proposed to decrease natural gas's operating temperature to -20 ⁰F to remove the impurities from natural gas. The decrease of the natural gas's operating temperature has some consequences to the gas mixers such as hydrate formation at high pressure and low temperature, solidification of ethylene glycol (EG) solution, and the icing of the surface due to low temperature on the surface of chiller (three constraints). The Aspen Hysys 8.8 was used to obtain the suitable flowrate and concentration of the EG solution injected into the natural gas. Peng-Robinson's model was considered the most appropriate thermodynamic property model, and thus it has been applied for this research. The calculation results showed that the EG solution injection would reduce the hydrate formation due to water vapor absorption in the natural gas by EG. The EG solution's flowrate and concentration were varied from 20,000-2,000,000 lb/hr and 80-90 wt.%. When the separation was carried out at the operating temperature of -20 ⁰F, the EG solution's concentration fulfilling the requirement was of 80-84 wt.% with the flowrate of EG solution of 900,000 lb/hr and even more. This amount is not operable. More focused investigation was done for the variation of the operating temperature. Increasing operating temperature significantly reduced the flowrate of EG solution to about 200,000 lb/hr. An alternative process was proposed by focusing on two concentration cases of 80 and 85 % of weight at the low flow rate of EG solution, respectively. These simulations were intended to predict impurities' concentration in the effluent of Dew Point Control Unit (DPCU). The concentrations of BTX, heavy hydrocarbon, mercaptane, and COS flowing out of DPCU were 428.1 ppm, 378.4 ppm, 104 ppm, and 13.3 ppm, respectively. The concentrations of BTX and heavy hydrocarbon are greater than the minimum standard required. It is needed to install an absorber to absorb BTX and heavy hydrocarbon. However, the absorber capacity will be much smaller than if the temperature of natural gas is not decreased and not injected by the EG solution.
Batch filtration model of proanthocyanidins purification process from sorghum pericarp extract using polyethersulfone membrane Afandy, Moh. Azhar; Sediawan, Wahyudi Budi; Hidayat, Muslikhin; Susanti, Devi Yuni; Sawali, Fikrah Dian Indrawati; Mustikaningrum, Mega
Jurnal Rekayasa Proses Vol 18 No 1 (2024): Volume 18, Number 1, 2024
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.90292

Abstract

Sorghum is one type of plant rich in polyphenol chemicals, one of which is proanthocyanidin. The goal of this work was to construct a filtration equation model for the purification of proanthocyanidin compounds in sorghum pericarp extracts utilizing ultrafiltration methods at varied transmembrane pressures and molecular weight cut-off values on asymmetric polyethersulfone (PES) membranes. The pressure difference and size of MWCO were used to determine the rate of cake formation induced by fouling and concentration polarization. The model suggested in this work is based on a compressible filtration model that can represent the decrease in permeability values and the cake formation process produced by the compression of particles deposited on the surface of the membrane. The results reveal that the transmembrane pressure and MWCO considerably affect the performance of the proanthocyanidins separation process employing ultrafiltration membrane technology. The higher the transmembrane pressure, the higher the permeation flow rate. The effect of MWCO on permeability varies with the type of membrane and fluid employed. The larger the MWCO, the higher the permeability since the membrane pores are more significant and more accessible for the liquid to pass through. The high transmembrane pressure not only helps the feed flow swiftly through the membrane and overcomes the resistance but also encourages substance accumulation until the bulge component drops, resulting in a blocking mechanism in the surface or pore of the membrane. The batch filtration model suggested in this work exhibits a reasonably good fit, which can be seen from the projected data values using a model that tends to approach the experimental data values and may be employed as a model that depicts the cake-forming process on the membrane surface.
Integrated CFD and Aspen Plus Simulation for Optimizing Biomass Combustion: A Study on Sugarcane Bagasse Nugraha, Maulana Gilar; Azarya, Eblin Alle; Hidayat, Muslikhin; Saptoadi, Harwin
Journal of Engineering and Technological Sciences Vol. 57 No. 5 (2025): Vol. 57 No. 5 (2025): October
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2025.57.5.8

Abstract

This study presents an integrated simulation approach to optimize biomass combustion using sugarcane bagasse as a renewable feedstock. Computational fluid dynamics (CFD) was employed to model combustion hydrodynamics, while Aspen Plus was used to simulate pyrolysis product distribution based on Gibbs free energy minimization. The simulation involved key parameters such as air-fuel ratio, excess air level (100% and 200%), and combustion temperature profiles, which were validated against experimental data from a lab-scale grate-fired furnace. The pyrolysis results revealed that increasing the temperature from 400°C to 600°C significantly enhanced CO and H₂ concentrations, thereby improving syngas reactivity. CFD analysis showed that, at 100% excess air, CO₂ concentration reached 9.15% with an average freeboard temperature of 405.2°C, while at 200% excess air, the CO₂ dropped to 6.46% and the temperature decreased to 397.9°C, indicating reduced combustion efficiency. These results underscore the importance of optimizing air supply to enhance combustion performance and minimize unburnt volatiles. The findings confirm that integrating CFD and Aspen Plus simulations provides a reliable framework for improving the efficiency and environmental performance of biomass combustion systems.
Co-Authors ', Padil Akhwari Wahyu P Annisa Fitri Harahap Arief Budiman Arif Kusumawanto Aswati Mindaryani Azarya, Eblin Alle Cahyono, Rochim Bakti Danang Tri hartanto Devi Yuni Susanti Doni Agus Sumitro Eddy Kurniawan EKA SARI Emmy Nurhayati Febrina Sarlinda Fikrah Dian Indrawati Sawali Fikry Nashrullah K Hartanto, Danang Tri Harwin Saptoadi Hary Sulistyo Hary Sulistyo Henry Prastanto Henry Prastanto, Henry Iqbal Haitami Liau, Selva Susilowati M Sri Prasetyo Budi Mahendra Rian Putra Maria Arista Ulfa Megawati Megawati Meutia Ermina Toif Moh Fahrurrozi Moh. Azhar Afandy Moh. Fahrurrozi Muhammad Arif Wibisono, Muhammad Arif Muhammad Mufti Azis Muhammad Mufti Aziz Muhammad Natsir Hakiki Mustikaningrum, Mega Ningrum, Sari Sekar Nugraha, Maulana Gilar Nurhalim Nurhalim Nurkholis Nurkholis Nurkholis Nurkholis Padil, Padil Panut Mulyono Rahayu, Neni Rina Sri Kasiamdari Rochim Bakti Cahyono Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi S Syamsiah Sarto Sarto Sarto Sarto Sarto Sarto Selo Sulistyo, Selo Sigit Abdurrakhman Siti Syamsiah Siti Syamsiah Sri Puji Saraswati Sri Rahayu Gusmarwani, Sri Rahayu Suhanan Suhanan Sunarya, Rahmat Sutijan Sutijan Aziz Sutijan Sutijan Sutijan Sutijan Syafrima Wahyu Syamsiah, Siti Syarifhidayahtullah Syarif Ubet Khoirudin Veronika, Chintia Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wibowo, Claudia Shinta Octa