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All Journal ASEAN Journal of Systems Engineering Jurnal Rekayasa Proses Jurnal Teknoin Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences Reaktor International Journal of Renewable Energy Development Rekam : Jurnal, Fotografi, Televisi Animasi Eksergi: Chemical Engineering Journal Bulletin of Chemical Reaction Engineering & Catalysis Seminar Nasional Teknik Kimia Kejuangan PROFIT : Jurnal Administrasi Bisnis Journal of Tropical Biodiversity and Biotechnology JPSE (Journal of Physical Science and Engineering) Sinkron : Jurnal dan Penelitian Teknik Informatika JKBM (JURNAL KONSEP BISNIS DAN MANAJEMEN) Jurnal Ilmiah Universitas Batanghari Jambi Squalen Bulletin of Marine and Fisheries Postharvest and Biotechnology EKONOMIS : Journal of Economics and Business Indonesian Journal of Chemistry Communications in Science and Technology Jurnal Rekayasa Proses JURNAL EDUCATION AND DEVELOPMENT ALGORITMA : JURNAL ILMU KOMPUTER DAN INFORMATIKA Brikolase : Jurnal Kajian Teori, Praktik dan Wacana Seni Budaya Rupa Jurnal Ilmiah Penegakan Hukum Jurnal Manajemen Informasi Kesehatan Indonesia (JMIKI) Jurnal Review Pendidikan dan Pengajaran (JRPP) JENIUS (Jurnal Ilmiah Manajemen Sumber Daya Manusia) ASEAN Journal of Chemical Engineering Journal of Computer Networks, Architecture and High Performance Computing Jurnal Ilmu Administrasi dan Studi Kebijakan (JIASK) Jurnal Manajemen Pendidikan dan Ilmu Sosial (JMPIS) Indonesian Community Service and Empowerment Journal (IComSE) Journal of Industrial Engineering & Management Research (JIEMAR) Journal of Economics and Business UBS Journal of Applied Data Sciences Jurnal Teknik Kimia Indonesia Charity : Jurnal Pengabdian Masyarakat JIKEM: Jurnal Ilmu Komputer, Ekonomi dan Manajemen Jurnal Ilmu Komputer dan Sistem Komputer Terapan (JIKSTRA) Indonesian Journal of Innovation Studies Abimanyu: Journal of Community Engagement Prosiding Snastikom Jurnal Keperawatan INDOGENIUS SENTRI: Jurnal Riset Ilmiah Blend Sains Jurnal Teknik Prioritas : Jurnal Pengabdian Kepada Masyarakat Co-Creation : Jurnal Ilmiah Ekonomi Manajemen Akuntansi dan Bisnis Jurnal Sosial dan Sains eProceedings of Art & Design International Journal of Multidisciplinary Sciences and Arts Journal of Artificial Intelligence and Digital Business Applied Engineering and Technology Ranah Research : Journal of Multidisciplinary Research and Development Journal Global Technology Computer Buletin Utama Teknik Kriez Academy International Journal of Renewable Energy Development Jurnal Ilmu Komputer dan Sistem Informasi Jurnal Pengabdian Masyarakat Jurnal Agroteknologi Merdeka Pasuruan Bulletin of Chemical Reaction Engineering & Catalysis Journal of Fisheries & Marine Jurnal Audit, Pajak, Akuntansi Publik Jurnal Rekayasa Proses SYAHADAT: Journal of Islamic Studies Mekongga: Jurnal Pengabdian Masyarakat INOVASI: Jurnal Ekonomi, Keuangan, dan Manajemen POTENSI: Jurnal Pengabdian Masyarakat Ekonomi dan Bisnis Journal of Computer Science Artificial Intelligence and Communications TECHNOLOGIC Jurnal Ilmu Komputer dan Teknik Informatika Jurnal Bahasa Rupa Jurnal Pengabdian Masyarakat Berdampak
Arief Budiman
Chemical Engineering Department Universitas Gadjah Mada
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Thermal Decomposition and Kinetic Studies of Pyrolysis of Spirulina Platensis Residue Jamilatun, Siti; Budhijanto, Budhijanto; Rochmadi, Rochmadi; Budiman, Arief
International Journal of Renewable Energy Development Vol 6, No 3 (2017): October 2017
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.6.3.193-201

Abstract

 Analysis of thermal decomposition and pyrolisis reaction kinetics of Spirulina platensis residue (SPR) was performed using Thermogravimetric Analyzer. Thermal decomposition was conducted with the heating rate of 10, 20, 30, 40 and 50oC/min from 30 to 1000oC. Thermogravimetric (TG), Differential Thermal Gravimetric (DTG), and Differential Thermal Analysis (DTA) curves were then obtained. Each of the curves was divided into 3 stages. In Stage I, water vapor was released in endothermic condition. Pyrolysis occurred in exothermic condition in Stage II, which was divided into two zones according to the weight loss rate, namely zone 1 and zone 2. It was found that gasification occurred in Stage III in endothermic condition. The heat requirement and heat release on thermal decomposition of SPR are described by DTA curve, where 3 peaks were obtained for heating rate 10, 20 and 30°C/min and 2 peaks for 40 and 50°C/min, all peaks present in Zone 2. As for the DTG curve, 2 peaks were obtained in Zone 1 for similar heating rates variation. On the other hand, thermal decomposition of proteins and carbohydrates is indicated by the presence of peaks on the DTG curve, where lignin decomposition do not occur due to the low lipid content of SPR (0.01wt%). The experiment results and calculations using one-step global model successfully showed that the activation energy (Ea) for the heating rate of 10, 20, 30, 40 and 50oC/min for zone 1 were 35.455, 41.102, 45.702, 47.892 and 47.562 KJ/mol, respectively, and for zone 2 were 0.0001428, 0.0001240, 0.0000179, 0.0000100 and 0.0000096 KJ/mol, respectively.Keywords: Spirulina platensis residue (SPR), Pyrolysis, Thermal decomposition, Peak, Activation energy.Article History: Received June 15th 2017; Received in revised form August 12th 2017; Accepted August 20th 2017; Available onlineHow to Cite This Article: Jamilatun, S., Budhijanto, Rochmadi, and Budiman, A. (2017) Thermal Decomposition and Kinetic Studies of Pyrolysis of Spirulina platensis Residue, International Journal of Renewable Energy Development 6(3), 193-201.https://doi.org/10.14710/ijred.6.3.193-201
Tin (II) Chloride Catalyzed Esterification of High FFA Jatropha Oil: Experimental and Kinetics Study Kusumaningtyas, Ratna Dewi; Handayani, Prima Astuti; Rochmadi, Rochmadi; Purwono, Suryo; Budiman, Arief
International Journal of Renewable Energy Development Vol 3, No 2 (2014): July 2014
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.3.2.75-81

Abstract

Biodiesel is one of the promising energy source alternatives to fossil fuel. To produce biodiesel in a more economical way, the employment of the low-cost feed stocks, such as non-edible oils with high free fatty acid (FFA), is necessary. Accordingly, the esterification reaction of FFA in vegetable oils plays an important role in the biodiesel production. In this work, esterification of FFA contained in Crude Jatropha Oil (CJO) in the presence of tin (II) chloride catalyst in a batch reactor has been carried out. The esterification reaction was conducted using methanol at the temperature of 40-60 °C for 4 hours. The effect of molar ratio of methanol to oil was studied in the range 15:1 to 120:1. The influence of catalyst loading was investigated in the range of 2.5 to 15% w/w oil. The optimum reaction conversion was obtained at 60 °C with the catalyst loading of 10% w/w oil and molar ratio of methanol to oil of 120:1. A pseudo-homogeneous reversible second order kinetic model for describing the esterification of FFA contained in CJO with methanol over tin (II) chloride catalyst was developed based on the experimental data. The kinetic model can fit the data very well.
Multi-Feedstocks Biodiesel Production from Esterification of Calophyllum inophyllum Oil, Castor Oil, Palm Oil and Waste Cooking Oil Hadiyanto, H; Aini, Apsari Puspita; Widayat, Widayat; Kusmiyati, Kusmiyati; Budiman, Arief; Roesyadi, Achmad
International Journal of Renewable Energy Development Vol 9, No 1 (2020): February 2020
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.9.1.119-123

Abstract

Biodiesel can be produced from various vegetable oils and animal fat. Abundant sources of vegetable oil in Indonesia, such as Calophyllum inophyllum, Ricinus communis, palm oil, and waste cooking oil, were used as raw materials. Multi-feedstock biodiesel was used to increase the flexibility operation of biodiesel production. This study was conducted to determine the effect of a combination of vegetable oils on biodiesel characteristics. Degumming and two steps of esterification were applied for high free fatty acid feedstock before trans-esterification in combination with other vegetable oils. Potassium hydroxide was used as a homogenous catalyst and methanol as another raw material. The acid value of C. inophyllum decreased from 54 mg KOH/gr oil to 2.15 mg KOH/gr oil after two steps of esterification. Biodiesel yield from multi-feedstock was 87.926% with a methanol-to-oil molar ratio of 6:1, temperature of 60 ℃, and catalyst of 1%wt. ©2020. CBIORE-IJRED. All rights reserved
Effect of Devices and Driving Pressures on Energy Requirements and Mass Transfer Coefficient on Microalgae Lipid Extraction Assisted by Hydrodynamic Cavitation Setyawan, Martomo; Mulyono, Panut; Sutijan, Sutijan; Pradana, Yano Surya; Prasakti, Laras; Budiman, Arief
International Journal of Renewable Energy Development Vol 9, No 3 (2020): October 2020
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2020.26773

Abstract

Previous studies of biodiesel production from microalgae have concluded that microalgal biodiesel is not profitable at an industrial scale due to its excessive energy consumption for lipid extraction. Hydrodynamic cavitation lipid extraction is one of the extraction methods which has lower energy consumption. Thismethod enables a fast extraction rate and low energy consumption for cell disruption. In order to achieve optimum process conditions, several influential parameters, which are cavitation generator geometry and driving pressure, need to be scrutinized. The experimental result showed that the maximum yield was obtained at 5 bar driving pressure. The lowest specific extraction energy was obtained at 4.167 bar driving pressure while using one side concave cavitation generator geometry with the ratio of the reduced cross-sectional area of 0.39. The value of the energy extraction requirement 17.79 kJoule/g lipids is less than the biodiesel heating value, and the value of the volumetric mass transfer coefficient is almost 20 times fold greater than the conventional extraction method, therefore this method is promising to be further developed.
Verifikasi model non kesetimbangan menara distilasi pada campuran hidrokarbon biner Budiman, Arief; Sugeng, Joko
Jurnal Teknik Kimia Indonesia Vol 3, No 1 (2004)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2004.3.1.4

Abstract

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Thermogravimetric Analysis and Kinetic Study on Catalytic Pyrolysis of Rice Husk Pellet using Its Ash as a Low-cost In-situ Catalyst Wibowo, Wusana Agung; Cahyono, Rochim Bakti; Rochmadi, Rochmadi; Budiman, Arief
International Journal of Renewable Energy Development Vol 11, No 1 (2022): February 2022
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2022.41887

Abstract

The thermogravimetric behaviors and the kinetic parameters of uncatalyzed and catalyzed pyrolysis processes of a mixture of powdered raw rice husk (RRH) and its ash (RHA) in the form of pellets were determined by thermogravimetric analysis at three different heating rates, i.e., 5, 10, and 20 K/min, from 303 to 873 K. This research aimed to prove that the rice husk ash has a catalytic effect on rice husk pyrolysis. To investigate the catalytic effect of RHA, rice husk pellets (RHP) with the weight ratio of RRH:ARH of 10:2 were used as the sample. Model-free methods, namely Friedman (FR), Kissinger-Akahira-Sunose (KAS), and Flynn-Wall-Ozawa (FWO), were used to calculate the apparent energy of activation(EA). The thermogravimetric analysis showed that the decomposition of RHP in a nitrogen atmosphere could be divided into three stages: drying stage (303-443 K), the rapid decomposition stage (443-703 K), and the slow decomposition stage (703-873 K). The weight loss percentages of each stage for both uncatalyzed and catalyzed pyrolysis of RHP were 2.4-5.7%, 35.5-59.4%, and 2.9-12.2%, respectively. Using the FR, FWO, and KAS methods, the values of  for the degrees of conversion (a) of 0.1 to 0.65 were in the range of 168-256 kJ/mol for the uncatalyzed pyrolysis and 97-204 kJ/mol for the catalyzed one. We found that the catalyzed pyrolysis led the  to have values lower than those got by the uncatalyzed one. This phenomenon might prove that RHA has a catalytic effect on RHP pyrolysis by lowering the energy of activation.
Implementation Combination Cryptographic Algorithm Triangle Chain Cipher and Vigenere Cipher In Securing Data in Database Arif, Ahmad; Perdana, Adidtya; Budiman, Arief
Sinkron : jurnal dan penelitian teknik informatika Vol. 6 No. 1 (2021): Article Research Volume 6 Issue 1: January 2021
Publisher : Politeknik Ganesha Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33395/sinkron.v7i1.11236

Abstract

Data security is most important today, because the rampant data theft resulting in a lot of misuse of data by irresponsible parties so that it makes us anxious as data owners, for data storage it is usually stored in the database. From these problems the idea emerged to create a cryptographic system where the system can secure data by encrypting and decrypting also make data fully save and then the data owned by the user. This study aims to secure the data in the database by encrypting the original data without destroying the original data when later after decrypted. To perform this security, a cryptographic methodology is used with both of  method that is Vigenere Cipher and Triangle Chain Cipher algorithms which are implemented in the application because both of methodology have same root that is classical cryptographic. This application will later be used as a medium for users to secure their data in the database so that later data theft will not to be easy. After doing fully research that produces applications that can implement combination of Vigenere Cipher and Triangle Chain Cipher algorithms,data in the encrypted database field is safe because encryption has been done to the data.
Polimerisasi larutan akrilamid dengan mekanisme radikal bebas menggunakan metoda mixed-solvent precipitation Boy Arief Fachri; R Rochmadi; Arief Budiman
Jurnal Teknik Kimia Indonesia Vol 3, No 2 (2004)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2004.3.2.8

Abstract

The most common method for producing polyacrylamide is solution polymerization. In this way, the polymer product is difficult to be separated. A method for overcoming this problem is using mixed­ solvent precipitation method. The kinetics aspect of free-radical polymerization of acrylamide using mixed-solvent precipitation method was studied. Acrylamide was polymerized in methanol-water solution with potassium persulfate as initiator. Two models of polymerization were proposed based on the initiation stage. Model I described the first order and the second order was represented by model 2. Polymerization of acrylamide was carried out in batch process. A methanol-water solution of acrylamide was charged into the flask and heated to the desired temperature. When the desired temperature was reached, the initiator potassium persulfate was introduced quickly into the reaction medium. Aliquots were taken from the reaction medium at a regular time then analyzed its polymer content by gravimetri method.  Variables investigated were temperature (45-60°C), amounts of initiator (2.8.10-5-5.10-5 mole/mL) and monomer concentration (3.52.10-4-1.41.10-3 mole/mL). It can be concluded that both model 1 and model 2 can predict well the polymerization of acrylamide. The average error of model is less than model 2. Spesifically, the rate constant for every reaction in the models is got from the results of this experiment.  Key Words : Acrylamide, Potassium Persulfate, Mixed-solvent Precipitation, Polymerization, The Kinetics  Aspect  Abstrak  Polimerisasi larutan merupakan polimerisasi akrilamid yang paling umum, akan tetapi memiliki kelemahan dalam proses pemisahan polimer yang terbentuk. Polimerisasi akrilamid dengan mekanisme radikal bebas menggunakan metode mixed-solvent precipitation merupakan salah satu cara untuk mengatasi kelemahan tersebut. Penelitian ini dilakukan untuk mempelajari kinetika reaksi polimerisasi akrilamid melalui pengembangan model pada tahap inisiasi, yaitu model untuk order satu dan model 2 untuk order 2. Polimerisasi akrilamid dilakukan secara batch didalam labu leher tiga. Larutan akrilamid dimasukan ke dalam labu leher tiga dan dipanaskan mencapai suhu yang telah ditentukan, kemudian ditambahkan inisiator kalium persulfat (suhu dijaga tetap). Cuplikan diambil pada selang waktu tertentu dan kandungan polimer dianalisa dengan cara gravimetri. Peubah yang dipelajari meliputi variasi suhu (45-60 °C), jumlah inisiator (2.8.10 -5-5.5.10 -5 mol/mL) dan konsentrasi monomer (3.52.10-4-1.41.10-3 mol/mL). Berdasarkan hasil penelitian, dapat disimpulkan bahwa model 1 dan model 2 dapat menjelaskan kinetika polimerisasi akrilamid, akan tetapi model 1 memberikan ralat rata-rata yang lebih kecil dibandingkan dengan model 2. Secara spesijik, konstanta kecepatan untuk masing-masing reaksi dalam model diperoleh dari hasil percobaan ini.  Kata Kunci : Akrilamid, Kalium Persulfat, Mixed-solvent  Precipitation,  Polimerisasi,   Kinetika Reaksi
Biodiesel production from Palm Fatty Acid Distillate (PFAD) using reactive distillation Arief Budiman; Alita Lelyana; Daniar Rianawati; S Sutijan
Jurnal Teknik Kimia Indonesia Vol 11, No 2 (2012)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2012.11.2.7

Abstract

Palm fatty acid distillate (PFAD) is a lower-value by-product obtained during the refining of palm oil and contained high amount of free fatty acid (FFA). However, it’s a potentially valuable and low-cost raw material for the production of biodiesel through esterification process. Esterification of FFA using the conventional batch faces a challenge since it is low in productivity and requires high excess of reactant so that it is not efficient for large-scale production. To overcome this problem, reactive distillation (RD) is the best candidate. RD is one of the most attractive equipment which provides potential benefits for the esterification reaction. To obtain an optimal design of the RD, an accurate model and simulation of the process is needed. In this work, a simulation study of biodiesel production from PFAD as feedstock using RD is presented by using ASPEN Plus v7.1. Two case studies of total reflux (case A) and recycled distillate (case B) were demonstrated. Close relation was found among high separation and high energy consumption in RD. Two models of RD show the more economical heat duty of both condenser and reboiler. Effect of L/F ratio, number of stages in reaction zone, and model of RD to conversion of esterification reaction were discussed. Keywords: biodiesel, esterification, PFAD, reactive distillationAbstrakSuatu produk hasil samping yang memiliki nilai ekonomi rendah, biasa dikenal sebagai Palm Fatty Acid Distilate (PFAD), diperoleh dari proses pemurnian minyak kelapa sawit. PFAD mengandung asam lemak bebas (FFA) tinggi, cukup potensial, dapat digunakan sebagai bahan baku produksi biodiesel melalui proses esterifikasi. Esterifikasi FFA dengan proses batch konvensional menghadapi tantangan karena produktivitasnya cukup rendah dan membutuhkan excess reaktan yang tinggi sehingga tidak efisien jika diterapkan untuk produksi skala besar. Reactive distillation (RD) dapat menjadi solusi untuk mengatasi masalah ini. RD merupakan alat yang berpotensi memberikan keuntungan dalam reaksi esterifikasi. Untuk mendapatkan desain yang optimal dari suatu RD, pemodelan yang akurat dan simulasi dari proses ini diperlukan. Di sini, dilakukan simulasi produksi biodiesel dari PFAD menggunakan RD dilakukan dengan ASPEN Plus v7.1. Dua kasus dipelajari, yaitu refluks total (kasus A) dan recycle distillate (kasus B) yang bertujuan untuk mempelajari pengaruh rasio antara cairan yang dikembalikan ke kolom dengan feed (L/ F), dan variable variable desain. Semakin tinggi kemurnian dari hasil pemisahan, konsumsi energi yang dibutuhkan juga menjadi semakin besar. Perbandingan antara dua model dari kolom distilasi reaktif menunjukkan beban panas kondensor dan reboiler menjadi lebih ekonomis. Pengaruh perbandingan L/F, jumlah stage dalam zona reaksi, dan model kolom distilasi reaktif terhadap konversi reaksi esterifikasi akan di bahas di sini.Kata kunci: biodiesel, esterifikasi, PFAD, menara distilasi
Asetosilasi Terpentin Indonesia Menggunakan Katalis Asam Sulfat Diana Diana; Arief Budiman
Teknoin Vol. 24 No. 1 (2018)
Publisher : Faculty of Industrial Technology Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/teknoin.vol24.iss1.art3

Abstract

Indonesia is one of the largest turpentine producing countries in the world. Turpentine is one type of essential oil whose main component is alpha pinene. Alpha pinene is a bicyclic terpene that can undergo various reactions. This research aims to study the reaction process of turpentine acetoxylation using sulfuric acid catalyst. The reaction is carried out using glacial acetic acid and acetic acid solution. The experiments were run in a batch reactor for 2 hours at a constant temperature. Samples are taken to be analyzed using gas chromatography (GC). From the analysis it was found that the products included esters, isomers, and monocyclic alcohols. The use of acetic acid solution will significantly increase the monocyclic alcohol yield. The ratio of alpha pinene and acetic acid affects the conversion and product selectivity. While the purity of alpha pinen has no effect on the conversion achieved, but affects the selectivity of the resulting product.
Co-Authors . Widayat Abdul Ghofur Abdul Rohman Achmad Halim Purbohandono Achmad Rizky Fazar Achmad Roesyadi Adidtya Perdana, Adidtya Afkarina, Izzeh Aflah, Arief agung setiawan Agus Aktawan, Agus Agus Suyono, Eko Ahda Hafidz, Anggaditya Ahmad Agus Setiawan Ahmad Tawfiequrrahman Yuliansyah Aini, Apsari Puspita Akly, Faisal Akmal, M. Alfarisi, Muhammad Alisharsa, Muhammad Dafa Alita Lelyana Alwiyah Alwiyah Amelia, Ria Anastasia Ary Noviyanti Andhika Puspito Nugroho Andini Putri, Egydia Ardy Aprilian Anwar Ari Usman, Ari Arif Yulianto Widi Kurniawan Arifin, A. Zainul Arum Wulandari, Hesti Ashari, Maajid Surya Putra Astiti, Adam Avido Yuliestyan Aydogmus, Ilkay Baehaqi Boy Arief Fachri Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto Budhijanto, Budhijanto Budi Budi Budi BUDI SETIADI DARYONO Burhanto, Burhanto Cahyono, Rochim Bakti Chafid Fandeli Cindiati, Maya Damaiyanti, Mukhripah Damayanti, Fera Daniar Rianawati David David Dedi Irwan Defiani Putri Denanti Demmanggasa, Yultan Dewayanto , Nugroho Dewi, RD. D. Lokita Pramesti Dewi, Rike Tri Kumala Diana Diana Diananto Prihandoko Diansyah, T.M Diena Yudiarti Dwi Pratiwi Edy Yulianto Eko Agus Suyono Eko Agus Suyono Ely Afridiana Kuncoro Eni Budiyati Erfianti, Tia Erna Ferrinadewi Febrian, Wenny Desty Fitri Annisah lubis, Yessi Fitri Natalia Fitri, Linda Dwi Novial Galang Fitrianto, Wisesa Ghifari, Muhmmad Nurshandy Al Gusti, Alexander Kenzy Pinaring H Hadiyanto H.M. Edwar Juliartha Handayani, Fitriyani Yetti Handayani, Septy Handoko, Divi Harahap, Herlina Hary Sulistyo Heri Heriyanto Heri Rustamaji Herti Utami Husaini, M. Hutasuhut, Muhammad Rizki Hamdani Ilham Mufandi Ilham Mufandi Imas Komariah, Imas Imran Lubis Indriana Lestari Irgie, Rafi Irwan Setyaji ISKANDAR Istiqomah, Aisa Fadhilatul Jarman Arroisi Joko Waluyo Karilanata, Khalid Erlangga Khalidy, Furqan Kinanti, Isnatul Agil Kurnianto, Dedy Kurniawan, Aries Taufiq Kurniawan, Yulius Kusmeri, Kusmeri Kustiawan, Unggul Kusuma, Melvin Aryadika Lakilaki, Eogenie Laksana, Rio Dhani Lestari, Dwi Indah Lestari, Yuyun Dwi Lucia Tri Suwanti, Lucia Tri M Iqbal Maulana Ginting Maggandari, Revata Mahfuddin, Rohmat Makalew, Paulina Vega Mardiah Mardiah Mardyansah, Deviko Margaretha Praba Aulia Maria Theresia Sri Budiastuti Martomo Setyawan Marwa, Annisa Masduki Maswani Maswani, Maswani Mien Rukmini, Mien Minny Elisa Yanggah Mitha Puspitasari Mochammad Donny Koerniawan Muhammad Mufti Azis Muhammad Rivai Muhammad Saifi Muhammad Yudhi Rezaldi, Muhammad Yudhi Muis Murtadho Munadi, Yudhi Muzakar Isa Nabila Fauzi Nadza, Reza Nainggolan, Theodora MV Natalia, Fitri Naufalina, Fariha E Norjannah, Norjannah Nugroho Dewayanto, Nugroho Nur Wulan, Nur Nurafifah, Istini Nuril Huda Nurtiar, Haryo Oktafia, Linda Ortiz, Edixon Daniel Pandjaitan, Manahan Budiarto Panut Mulyono Pauzi, Riky Pereira, Julio Prabang Setyono Pradana, Yano Surya Prakasa, Razaan Mauli Al-Farizi Prasakti, Laras Prasetyo, Ridwan Budi Prima Astuti Handayani Putri Restu Dewati Putri, Renata Adaranyssa Egistha Qonita Maghfiroh, Khusnul R Rochmadi Rachmat Aulia, Rachmat Rachmawan Budiarto Ratna Dewi Kusumaningtyas Rediono, Erwin Regita, Nira C. Ridwan Budi Prasetyo Ringgani, Retno Riski, Sari Kurnia Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rojuaniah Rojuaniah Roto Roto Rozy, Ahmad Rusmiati, Elis Ryan Sadewo, Brilian S Sutijan Sadewo , Brilian Ryan Sarudin Sarudin, Sarudin Septiyaningsih Septiyaningsih Setianto, Diki Putra Setiantoro, Arief Eko Sholeh, Aminuddin Sihotang, Ferryanto Simanungkalit, Muhammad Iqbal Arghribi Sinaga, Jepriando Siregar, Muhammad Ramulia Siregar, Yosua Arihta R. Sada Siti Ferniah, Rejeki Siti Jamilatun Siti Jamilatun Siti Khadijah siti mudrikah Siti Soekiswati Siti Sundari Sitompul, Siti Cholijah Solly Aryza Sri Dwi Astuti Al Noor Sucahyati, Diarany Sugeng, Joko Suhendra Suhendra Suhendra Suhendra Sulistyawati Sulistyawati Sumitro Sumitro Suriati, Suriati Suryo Purwono Susanto, Try Sutijan Sutijan Sutijan Sutijan Sutijan Suyono, Dr. Eko Agus Syahputra, Tengku Tantri Yanuar Rahmat Syah Tarigan, Duncan Dancin Tiara Radinska Deanda Tommy Munaf Tommy, Tommy Topani, Ilham Tri Wahyu Setyaningrum, Tri Wahyu Ulfah Juniarti Siregar Ummul Khair Usman, Arie Utami, Dewi Ayu Anggraeni Vendy, Vicky Verawati, Linda Wahyu Wilopo Wahyudi Budi Sediawan Widodo, Condro widyastuti, ira Wijaya, R. Muh Syah Arief Atmaja Wiyono, Edi Wusana Agung Wibowo, Wusana Agung Yessi Fitri Annisah Lubis Yosa Fiandra Yulius Hari Yunita Sari Yuslainiwati, Yuslainiwati