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All Journal Jurnal Rekayasa Proses International Journal of Renewable Energy Development Mechatronics, Electrical Power, and Vehicular Technology Jurnal Bahan Alam Terbarukan Rekayasa Mesin Sinergi Seminar Nasional Teknik Kimia Kejuangan Journal of Engineering and Technological Sciences agriTECH Jurnal Rekayasa Proses Jurnal Teknik Kimia Indonesia Makara Journal of Technology Jurnal Rekayasa Proses
Wiratni Budhijanto
Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture 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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Sorption and Ion Exchange Behaviour of Natural Zeolite Packing Purnomo, Chandra Wahyu; Lenora, Bernice; Budhijanto, Wiratni; Hinode, Hirofumi
Makara Journal of Technology Vol. 21, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

It is well known that zeolite is an efficient metal ions adsorbent. The excess charge of the zeolite building blocks i.e. (AlO4)-5 and (SiO4)-4 creating a negative surface charge that attract metal cations. Beside the surface charge, zeolite also has three dimensional pore structure and reasonably large surface area which also can be used as adsorption sites. Ease of cation uptake make it suitable for many process with adsorption and desorption application. This study was conducted to observe the sorption and ion exchange behaviour of zeolite-betonite rings toward iron and cobalt cations. The results shows that the adsorption patterns follow Langmuir isotherm with the highest uptake capacity is 59,9 mg/g for Fe(II) and 57. 8 mg/g for Co(II).
PENGARUH JARAK NOSEL UDARA DENGAN OUTLET TERHADAP DIS-TRIBUSI UKURAN BUBBLE YANG DIHASILKAN OLEH MBG TIPE SWIRL Drajat Indah Mawarni; Indarto Indarto; Deendarlianto Deendarlianto; Wiratni Budhijanto
Jurnal Rekayasa Mesin Vol. 13 No. 2 (2022)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v13i2.977

Abstract

This research uses a swirl type MBG (MBG) with the gap variation between the air nozzle and the outlet of 1, 5 and10 mm. In this experiment, we used a tangential inlet of 25 mm and an outlet of 20 mm with a water flow rate of 20 – 70 l/min and an air flow rate range of 0.1 – 0.8 l/min, to determine the characteristics of MBG which include bubble distribution, pressure drop, hydraulic power, and efficiency. The probability of the diameter of the microbubble formed was in the range of 90 – 150 µm for all variations of the air nozzle gap. The larger the incoming water flow rate, the smaller the diameter of the bubbles formed, whereas if the water flow rate decreases, the diameter of the bubbles formed will increase. In contrast to the water flow rate, if the air flow rate increases, the diameter of the bubbles formed will increase, whereas if it decreases, the diameter of the bubbles will decrease. From the signal processing data, information was obtained about the comparison of the pressure drop of the three variations of the air nozzle gap, as follows: The higher the water flow rate, the pressure drop and hydraulic values increase significantly, while for air flow rate, the higher the air flow rate, the pressure drop and hydraulic power values will increase albeit not significantly. As for MBG efficiency, it will decrease significantly with increasing water flow rate and will increase insignificantly with decreasing water flow rate.
Evaluasi Perbandingan Kinerja Attached Culture Bioreaktor dan Hybrid Membran Bioreaktor dalam Mendegradasi Air Limbah Juniawan, Asyhar Sururi; Budhijanto, Wiratni; Marbelia, Lisendra
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2023: PROSIDING SNTKK 2023
Publisher : Seminar Nasional Teknik Kimia "Kejuangan"

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Abstract

Restaurant wastewater is categorized as grey wastewater, which is low strength wastewater with a chemical oxygen demand (COD) concentration of <1,000 mg/L. Therefore, further treatment is necessary before it is discharged into the environment. This study focused on comparing the performance of an attached culture bioreactor and a Hybrid Membrane Bioreactor (HMBR) in degrading restaurant wastewater. The bioreactors used a mesh filter support media of 70-80 μm. The bioreactors were operated with COD feed concentration 600 ppm and HRT 13 hour, with artificial grey water waste feed consisting of sugar, urea, KH2PO4, and tapioca flour. The %COD removal achieved by the attached culture bioreactor and HMBR was 90,48% – 90,95% and 96,28%– 96,79%, the turbidity out achieved by the attached culture bioreactor and HMBR was 57,42 – 60,25NTU and 4,95 – 5,62NTU, MLSS value reached  2,36 – 2,86ppm and 2,36 – 2,86ppm. The conclusion of this research shows that the HMBR has relatively better performance than the attached culture bioreactor
Perayaan 15 tahun Jurnal Rekayasa Proses Budhijanto, Wiratni
Jurnal Rekayasa Proses Vol 16 No 1 (2022): Volume 16, Number 1, 2022
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.76441

Abstract

Tahun 2022 ini Jurnal Rekayasa Proses merayakan hari jadi lima belas tahun sejak penerbitan Volume 1 di tahun 2007. Lima belas tahun adalah masa yang sangat panjang untuk belajar mengelola sebuah jurnal ilmiah dan membangun jati diri yang menjadi ciri khas jurnal ini. Sejak penerbitan pertamanya, Jurnal Rekayasa Proses diharapkan menjadi forum komunikasi antara akademisi dan praktisi industri dalam format publikasi ilmiah. Jurnal Rekayasa Proses mengambil peranan sebagai penghubung untuk memberikan informasi kepada pihak industri tentang inovasi terbaru dari kalangan akademisi, dan di lain pihak juga memberikan pencerahan kepada para peneliti di perguruan tinggi dan lembaga riset tentang problem riil yang dihadapi industri. Oleh karena itu, di tengah hiruk-pikuk jurnal-jurnal yang mengejar status kualitas jurnal melalui indeksasi di berbagai lembaga indeksasi terkemuka di dunia, Jurnal Rekayasa Proses berpegang pada visinya sebagai wahana komunikasi industri-akademisi dalam membangun teknologi merah-putih Indoneisa. Persyaratan yang dituntut oleh lembaga pengindeks internasional, terutama yang terkait dengan jumlah negara asing asal penulis dan hal-hal lain, menjadi tidak relevan dengan visi domestik Jurnal Rekpros sehingga saat ini Jurnal Rekayasa Proses mengukuhkan kualitas terbitannya melalui sistem akreditasi jurnal nasional Indonesia, dengan status terakreditasi Sinta 2. Pencapaian ini tidak lepas dari perjuangan para pemimpin redaksi dan pelaksana redaksi sejak tahun 2007, Prof. Hary Sulistyo, Almarhumah Dr. Siti Syamsiah, Dr. Sholeh Ma’mun, Dr. Indra Perdana, Dr. Teguh Ariyanto, dan Dr. Himawan Tri Bayu Murti Petrus, dukungan para Ketua Departemen Prof. I Made Bendiyasa, Prof. Suryo Purwono, dan Dr. Moh. Fahrurrozi, serta para anggota Dewan Redaksi yang merupakan sahabat-sahabat kami dari berbagai universitas dan lembaga riset di Indonesia. Kami juga sangat berterima kasih kepada Fakultas Teknik dan Badan Penerbit dan Publikasi UGM dengan berbagai dukungan dan fasilitasi untuk peningkatan kualitas Jurnal Rekayasa Proses selama lima belas tahun ini. Sebagai penanda hari jadi ke-15 tahun, Jurnal Rekpros melakukan perubahan besar dalam beberapa aspek. Tahapan pembaharuan pertama dalam Edisi 1 Volume 16 ini adalah perubahan tampilan jurnal dengan format yang lebih nyaman dibaca. Kami juga memodifikasi pilihan tema warna dengan memasukkan unsur kehijauan sebagai simbol era keberlanjutan di segala bidang, termasuk bidang rekayasa proses. Warna jingga tetap dipertahankan dalam warna tema jurnal karena warna ini merepresentasikan semangat Jurnal Rekayasa dengan tepat: hangat, bersemangat, optimis, percaya diri, dan ramah dalam membangun jejaring persahabatan.Secara bertahap akan terus dilakukan modifikasi Jurnal Rekayasa Proses untuk menyesuaikan dengan kebutuhan para pembaca dan perkembangan inovasi industri yang sangat cepat. Secara khusus kami sangat berterima kasih kepada Ibu Siti Nurleily Marliana (Lely) dan Bapak Joaquim Baeta (Alex), yang mendampingi proses pembaharuan jurnal ini selama dua tahun terakhir, mulai dari proses diskusi merumuskan tema, merancang template LaTeX, sampai eksekusi transformasi tampilan terbaru yang pertama keli terbit dalam edisi ulang tahun ke lima belas ini. Di atas semua hal teknis tersebut, penghargaan tertinggi kami kepada Ibu Lely dan Bapak Alex karena telah menginspirasi kami untuk mengelola sebuah jurnal ilmiah dengan sepenuh hati untuk satu tujuan yaitu kesempurnaan dokumentasi dan penyajian ilmu pengetahuan. Akhir kata, selamat menikmati Edisi Ulang Tahun ke Lima Belas Jurnal Rekayasa Proses. Semoga Jurnal Rekayasa Proses semakin baik memfasilitasi pertukaran ilmiah antara akademisi dan praktisi industri demi mewujudkan Indonesia yang inovatif dan mandiri dalam segala hal.
Celebrating fifteen years of Jurnal Rekayasa Proses Budhijanto, Wiratni
Jurnal Rekayasa Proses Vol 16 No 1 (2022): Volume 16, Number 1, 2022
Publisher : Jurnal Rekayasa Proses

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jrekpros.76442

Abstract

The year 2022 marks the fifteen-year service of \textit{Jurnal Rekayasa Proses} since its first edition in 2007. Fifteen years is a very long period to learn to manage a scientific journal and establish this journal's unique characteristics. Since its first issue, \textit{Jurnal Rekayasa Proses} is expected to become a communication platform between academicians and industrial practitioners in scientific publication format. \textit{Jurnal Rekayasa Proses} is an interface to introduce state-of-the-art innovation from the laboratory benches to the industrial application. On the other hand, it also updates the researchers in universities and institutions about the real problems in the industry. Therefore, amid journals' euphoria to pursue journal quality status through an international indexation platform, \textit{Jurnal Rekayasa Proses} opts to hold high its vision as the national scientific communication bridge between academicians and industrial practitioners to establish the flagship technology of Indonesia synergically. The requirement of international indexation, especially on the number of foreign countries' origins of the authors, is not entirely relevant to the domestic orientation of \textit{Jurnal Rekayasa Proses}. Therefore, \textit{Jurnal Rekayasa Proses} guaranteed its scientific quality through the national accreditation system for a scientific journal and has been accredited as Sinta 2 since 2018. For this achievement, \textit{Jurnal Rekayasa Proses} owed to all previous editor-in-chief and managing editors, Prof. Hary Sulistyo, Almarhumah Dr. Siti Syamsiah, Dr. Sholeh Ma’mun, Dr. Indra Perdana, Dr. Teguh Ariyanto, dan Dr. Himawan Tri Bayu Murti Petrus, and the Heads of Department Prof. I Made Bendiyasa, Prof. Suryo Purwono, Dr. Moh. Fahrurrozi, Dr. Muslikhin Hidayat, and Dr. A. Tawfiequrrahman Yuliansyah. Many thanks go to our best friends in various universities and research institutions who have voluntarily spent their priceless time and energy serving as reviewers and the editorial board of \textit{Jurnal Rekayasa Proses}. We also would like to extend our gratitude to the Faculty of Engineering and the Publisher and Publication Board Universitas Gadjah Mada for all of the support and facilities to improve the quality of \textit{Jurnal Rekayasa Proses} during the last fifteen years. As a special commemoration of the fifteen years of \textit{Jurnal Rekayasa Proses}' existence, significant changes are ongoing in several aspects of the journal. The first stage of \textit{Jurnal Rekayasa Proses} transformation in Edition 1 Volume 16 is the new journal theme with a more comfortable format for reading and linking to the references. We also modified the official colours by incorporating a shade of green as a symbol of the sustainability era in all areas, including process engineering. The orange color is maintained in the journal theme color palettes because this color very well represents the journal’s soul: warm, high-spirited, optimistic, confident, and friendly in expanding the network of friendship. More modifications will take place gradually to accommodate the readers' expectations and keep up with the fast-changing world. We warmly thank Siti Nurleily Marliana (Lelly) and Joaquim Baeta (Alex) for the excellent coaching in this journal transformation. We are thankful for all steps we have been guided, starting from the brainstorming to determine the journal theme and the tedious process of designing the article template in LaTeX. Finally, we completed the many steps of establishing the new look of the journal that you would enjoy in this issue forward. On top of all the technical details, we highly appreciate Lelly and Alex for inspiring us to manage a scientific journal passionately for one goal: perfection in the documentation and dissemination of the science for a broader audience. To wrap up, we invite you to enjoy our "Fifteen Year Birthday Edition" of Jurnal Rekayasa Proses. We hope that in the future, Jurnal Rekayasa Proses will grow better along its learning curve to serve the scientific exchanges between academicians and industrial practitioners to achieve a mutual goal of an innovative and resilient Indonesia.
Evaluation of double-stage Anaerobic Fluidized Bed Reactor (AFBR) for digestion of leachate: correlation of kinetic parameter with operational condition and process Prastyo, Elli; Budhijanto, Wiratni; Sudibyo, Hanifrahmawan
SINERGI Vol 29, No 2 (2025)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2025.2.013

Abstract

The objective of this study is to investigate the performance of using an advanced fluidized bed reactor (AFBR) of a double column configuration in breaking down leachate into biogas. The relationship of the kinetic parameters with the operating conditions and the performance of the double-column reactor during anaerobic digestion was examined. The substrate concentration, microorganism population, hydraulic retention time value, growth rate, and death rate of microorganisms were employed as reference points for evaluating anaerobic digestion performance and assessing the operating conditions. The results demonstrated that there was no notable correlation between the formation of volatile fatty acids (VFA) in the acidogenic reactor (R1), the degradation of VFA in the methanogen reactor (R2), and the methane production rate in the methanogen reactor (R2). The simulation results for VFA formation (dCVFA1/dt) and VFA degradation (dcVFA2/dt) exhibited a tendency to overestimate when operated at low HRT and underestimate at short HRT compared to the experimental results. The steady state of the simulation results exhibited a faster rate of progression than the experimental outcomes. The fitting data for Ksx1 and Ksx2 predominantly comprise dynamically evolving values that exert an influence upon um1 and um1, as well as kd1 and kd2, when the reactor is operated in continuous mode. Furthermore, the factors of inhibitor compounds and microorganism adaptation were not observed across all HRT values in this investigation. 
Co-Authors Alexander H. Soeriyadi Arini Wresta Arini Wresta Arini Wresta Astiti, Dian Fitriani Aswati Mindaryani Benny Arif Pambudiarto Chandra W Purnomo Chandra Wahyu Purnomo Chandra Wahyu Purnomo Damayanti, Sri Ismiyati Deendarlianto Dodi Satriawan, Dodi Drajat Indah Mawarni Edia Rahayuningsih Eli Prasetyo Heppy Kristiyani, Heppy Hinode, Hirofumi Indarto Indarto Juniawan, Asyhar Sururi Khalid Abdul Latif Kunthi Widhyasih Kurnianto, Rifki Wahyu Lenora, Bernice Marbelia, Lisendra Melly Mellyanawaty Moh. Fahrurrozi Muhammad Mufti Azis Ning Puji Lestari Nugraheni, Prihati Sih Pambudiarto, Benny Arif Prasetyo, Eli Prastyo, Elli Prihati Sih Nugraheni Ramadhani, Laily Isna Rizal I. Rosyid Rochim Bakti Cahyono Rochmadi Rochmadi Sarto Sarto Sarto Sholahuddin Al Ayyubi Siti Syamsiah Soeriyadi, Alexander H. Sperisa Distantina Sudibyo, Hanifrahmawan Ustadi, Ustadi Wahyudi Budi Sediawan Wahyudi Budi Sediawan Yosephine I. Ayuningtyas