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All Journal Reaktor International Journal of Science and Engineering (IJSE) International Journal of Renewable Energy Development TEKNIK METANA Jurnal Ilmu Lingkungan JURNAL TEKNOLOGI KIMIA DAN INDUSTRI IPTEK The Journal for Technology and Science Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Bulletin of Chemical Reaction Engineering & Catalysis Seminar Nasional Teknik Kimia Kejuangan Journal of Engineering and Technological Sciences Majalah Ilmiah MOMENTUM Science and Technology Indonesia Indonesia Journal of Halal Abdimas UNWAHAS : Jurnal Pengabdian Masyarakat UNWAHAS Jurnal Profesi Insinyur Indonesia Journal of Emerging Science and Engineering Bulletin of Chemical Reaction Engineering & Catalysis Advance Sustainable Science, Engineering and Technology (ASSET)

Luqman Buchori

Departemen Teknik Kimia, Fakultas Teknik, Universitas Diponegoro Jl Prof Sudharto, SH, Tembalang, Semarang, 50275, Telp/fax: (024)7460058

Author-ID : 243501

Religion Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences Transportation

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Biofuels Production from Catalytic Cracking of Palm Oil Using Modified HY Zeolite Catalysts over A Continuous Fixed Bed Catalytic Reactor Istadi, I.; Riyanto, Teguh; Buchori, Luqman; Anggoro, Didi D.; Pakpahan, Andre W. S.; Pakpahan, Agnes J.
International Journal of Renewable Energy Development Vol 10, No 1 (2021): February 2021
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.2021.33281

The increase in energy demand led to the challenging of alternative fuel development. Biofuels from palm oil through catalytic cracking appear as a promising alternative fuel. In this study, biofuel was produced from palm oil through catalytic cracking using the modified HY zeolite catalysts. The Ni and Co metals were impregnated on the HY catalyst through the wet-impregnation method. The catalysts were characterized using X-ray fluorescence, X-ray diffraction, Brunauerâ€“Emmettâ€“Teller (BET), Pyridine-probed Fourier-transform infrared (FTIR) spectroscopy, and Scanning Electron Microscopy (SEM) methods. The biofuels product obtained was analyzed using a gas chromatography-mass spectrometry (GC-MS) method to determine its composition. The metal impregnation on the HY catalyst could modify the acid site composition (Lewis and BrÃ¸nsted acid sites), which had significant roles in the palm oil cracking to biofuels. Ni impregnation on HY zeolite led to the high cracking activity, while the Co impregnation led to the high deoxygenation activity. Interestingly, the co-impregnation of Ni and Co on HY catalyst could increase the catalyst activity in cracking and deoxygenation reactions. The yield of biofuels could be increased from 37.32% to 40.00% by using the modified HY catalyst. Furthermore, the selectivity of gasoline could be achieved up to 11.79%. The Ni and Co metals impregnation on HY zeolite has a promising result on both the cracking and deoxygenation process of palm oil to biofuels due to the role of each metal. This finding is valuable for further catalyst development, especially on bifunctional catalyst development for palm oil conversion to biofuels.

Peningkatan Kuantitas dan Kualitas Produk UKM Wingko Babat di Kota Semarang dengan “Modified Oven” Luqman Buchori; Didi Dwi Anggoro; Dyah Hesti Wardhani
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2016: Prosiding SNTKK 2016
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Wingko babat merupakan makanan oleh-oleh khas Kota Semarang yang banyak diminati oleh para wisatawan. Proses pembuatan wingko babat meliputi beberapa tahap yaitu tahap pencampuran bahan baku, pencetakan, pemasakan, pendinginan dan pengemasan. Namunpada proses pemasakan, bahan yang dimasak tidak bisa merata. Hal ini disebabkan distribusi api atau panas tidak merata sehingga produk yang dihasilkan terkadang ada yang gosong. Kuantitas produk atau jumlah bahan yang dimasak tidak bisa maksimal karena proses pemasakan lama. Akibatnyasulit memenuhi permintaan pasar. Untuk mengatasi permasalahan ini perlu dilakukan perbaikan sistem pemasakan bahan wingko babatdengan cara mendesain ulang peralatan masaknya yaitu dengan rancang bangun alat masak bahan wingko babat.Alat ini dinamakan modified oven. Alat ini terdiri dari lima bagian utama yaitu (1) saluran pipa, (2) modified oven, (3)lubangtempat keluarnya api, (4) lubang sirkulasi udara, dan (5) penyangga. Hasil aplikasi alat ini menunjukkan peningkatan kuantitas dan kualitas produk. Kapasitas produksi meningkat 75% per harinya.Penggunaan bahan bakar untuk sekali masak menurun 50%. Omset produksi naik menjadi hampir 75% dan keuntungan UKM meningkat 2 kali lipat. Hasil pemasakan dapat seragam sehingga produk wingko yang dihasilkan tidak sampai gosong. Tekstur produk lembut dan proses pemasakan menjadi lebih cepat. Kualitas produk wingko menjadi lebih terjaga dan dapat memenuhi permintaan pasar khususnya pada musim wisatawan.

Pengaruh Metode Pembuatan Katalis Metal/Zeolit Y Terhadap Karakterisasi dan Aktivitasi Katalis Didi Dwi Anggoro; Luqman Buchori
Prosiding Seminar Nasional Teknik Kimia "Kejuangan" 2018: PROSIDING SNTKK 2018
Publisher : Seminar Nasional Teknik Kimia Kejuangan

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Utilizing Shear Factor Model and Adding Viscosity Term in Improving a Two-Dimensional Model of Fluid Flow in Non Uniform Porous Media Yazid Bindar; IGBN Makertihartha; M. Dani Supardan; Luqman Buchori
Journal of Engineering and Technological Sciences Vol. 39 No. 2 (2007)
Publisher : Institute for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itbj.eng.sci.2007.39.2.3

In a packed bed catalytic reactor, the fluid flow phenomena are very complicated because the fluid and solid particle interactions dissipate the energy. The governing equations were developed in the forms of specific models. The shear factor model was introduced in the momentum equation for covering the effect of flow and solid interactions in porous media. A two dimensional numerical solution for this kind of flow has been constructed using the finite volume method. The porous media porosity was treated as non-uniform distribution in the radial direction. Experimentally, the axial velocity profiles produce the trend of having global maximum and minimum peaks at distance very close to the wall. This trend is also accurately picked up by the numerical result. A more comprehensive shear factor formulation results a better velocity prediction than other correlations do. Our derivation on the presence of porous media leads to an additional viscosity term. The effect of this additional viscosity term was investigated numerically. It is found that the additional viscosity term improves the velocity prediction for the case of higher ratio between tube and particle diameters

PENGNARUH SENSITIVITAS PARAMETER OPERASI TERHADAP TERJADINYA REAKSI RUNAWAY PADA OKSIDASI METANOL MENJADI FORMALDEHID Luqman Buchori; Suherman Suherman
Reaktor Volume 10 No. 1 Juni 2006
Publisher : Dept. of Chemical Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.10.1.1-8

Formaldehida sebagai senyawa aldehida memiliki keistimewaan yaitu dapat bereaksi dengan hampir semua senyawa organik maupun anorganik sehingga formaldehida amat luas penggunaannya dalam industri yang ada. Reaksi oksidasi metanol menjadi formaldehida banyak dilakukan dalam reaktor anggun tetap. Dalam pengoperasiannya, di dalam reaktor ini sering dijumpai adanya fenomena yang sangat komplikatif dan mengganggu jalannya operasi yaitu distribusi aliran tidak merata (flow maldistribution) dan panas terlokalisir (hot spot). Kedua fenomena ini sangat berbahaya karena dapat mengakibatkan terjadinya reaksi "runaway", yakni terjadinya kenaikan temperatur dan tekanan reaktor yang sangat hebat secara mendadak. Penelitian ini bertujuan untuk mengetahui distribusi temperatur sepanjang reaktor unggun tetap akibat pengaruh variabel operasi serta mempelajari pengaruh sensitivitas parameter operasi tehadap terjadinya reaksi runaway. Penelitian dilakukan dengan percobaan pengamatan distribusi tempeatur pusat reaktor secara aksial dan pemodelan untuk mengetahui kapan terjadinya reaksi runaway. berdasarkan hasil percobaan, pada temperatur umpan mendekati temperatur reaksi, semakin besar laju alir massa umpan total maka suhu yang teramati semakin besar pula. Demikian pula pada pengaruh umpan, semakin besar tempperatur umpan maka temperatur keluaran reaktor juga semakin besar. Hasil penyepakatan secara umum menunjukkan pendekatan yang bagus dengan hasil eksperimen. Reaksi runaway terjadi pada hasil simulasi dimana parameter operasi yang berpengaruh adalah fraksi metanol. dalam penelitian ini direkomendasikan bahwa fraksi methanol dalam umpan tidak boleh lebih dari 0,1.

ULTRAFILTRATION AS PRETREATMENT OF REVERSE OSMOSIS: LOW FOULING ULTRAFILTRATION MEMBRANE PREPARED FROM POLYETHERSULFONE–AMPHIPHILIC BLOCK COPOLYMER BLEND Heru Susanto; Luqman Buchori; Siswo Sumardiono; Berkah Fajar; Titik Istirokhatun; I Nyoman Widiasa
Reaktor Volume 12, Nomor 4, Desember 2009
Publisher : Dept. of Chemical Engineering, Diponegoro University

This paper demonstrates the preparation of polyethersulfone (PES) ultrafiltration (UF) membranes via wet phase inversion method using either poly(ethylene oxide)-b-poly(propylene oxide)-b- poly(ethylene oxide) (Pluronic®, Plu) or polyethylene glycol (PEG) as hydrophilic modifier. Their effects on membrane structure as well as the resulting membrane performance and their stability in membrane polymer matrix were systematically investigated. The investigated membrane characteristics include surface hydrophilicity (by contact angle), surface chemistry (by FTIR spectroscopy) and water flux measurement. Visualization of membrane surface and cross section morphology was also done by scanning electron microscopy. The membrane performance was examined by investigation of adsorptive fouling and ultrafiltration using solution of bovine serum albumin as the model system. The stability of additive was examined by incubating the membrane in water (40oC) for up to 10 days. The results show that modification effects on membrane characteristic and low fouling behavior were clearly observed. Further, amphiphilic Pluronic generally showed better performance than PEG.

PLASTIC WASTE CONVERSION TO LIQUID FUELS OVER MODIFIED-RESIDUAL CATALYTIC CRACKING CATALYSTS: MODELING AND OPTIMIZATION USING HYBRID ARTIFICIAL NEURAL NETWORK – GENETIC ALGORITHM Istadi Istadi; Luqman Buchori; Suherman Suherman
Reaktor Volume 13, Nomor 3, Juni 2011
Publisher : Dept. of Chemical Engineering, Diponegoro University

The plastic waste utilization can be addressed toward different valuable products. A promising technology for the utilization is by converting it to fuels. Simultaneous modeling and optimization representing effect of reactor temperature, catalyst calcinations temperature, and plastic/catalyst weight ratio toward performance of liquid fuel production was studied over modified catalyst waste. The optimization was performed to find optimal operating conditions (reactor temperature, catalyst calcination temperature, and plastic/catalyst weight ratio) that maximize the liquid fuel product. A Hybrid Artificial Neural Network-Genetic Algorithm (ANN-GA) method was used for the modeling and optimization, respectively. The variable interaction between the reactor temperature, catalyst calcination temperature, as well as plastic/catalyst ratio is presented in surface plots. From the GC-MS characterization, the liquid fuels product was mainly composed of C4 to C13 hydrocarbons.KONVERSI LIMBAH PLASTIK MENJADI BAHAN BAKAR CAIR DENGAN METODE PERENGKAHAN KATALITIK MENGGUNAKAN KATALIS BEKAS YANG TERMODIFIKASI: PEMODELAN DAN OPTIMASI MENGGUNAKAN GABUNGAN METODE ARTIFICIAL NEURAL NETWORK DAN GENETIC ALGORITHM. Pemanfaatan limbah plastik dapat dilakukan untuk menghasilkan produk yang lebih bernilai tinggi. Salah satu teknologi yang menjanjikan adalah dengan mengkonversikannya menjadi bahan bakar. Permodelan, simulasi dan optimisasi simultan yang menggambarkan efek dari suhu reaktor, suhu kalsinasi katalis, dan rasio berat plastik/katalis terhadap kinerja produksi bahan bakar cair telah dipelajari menggunakan katalis bekas termodifikasi Optimisasi ini ditujukan untuk mencari kondisi operasi optimum (suhu reaktor, suhu kalsinasi katalis, dan rasio berat plastik/katalis) yang memaksimalkan produk bahan bakar cair. Metode Hybrid Artificial Neural Network-Genetic Algorithm (ANN-GA) telah digunakan untuk permodelan dan optimisasi simultan tersebut. Inetraksi antar variabel suhu reaktor, suhu kalsinasi katalis, dan rasio berat plastik/katalis digambarkan dalam bentuk plot surface. Berdasarkan karakterisasi GC-MS, produk bahan bakar yang diperoleh terdiri dari komponen-komponen hidrokarbon C4-C13.

KARAKTERISASI PROSES PENGERINGAN JAGUNG DENGAN METODE MIXED-ADSORPTION DRYING MENGGUNAKAN ZEOLITE PADA UNGGUN TERFLUIDISASI Hargono Hargono; Mohamad Djaeni; Luqman Buchori
Reaktor Volume 14, Nomor 1, April 2012
Publisher : Dept. of Chemical Engineering, Diponegoro University

CHARACTERIZATION OF CORN DRYING PROCESS USING MIXED-ADSORPTION DRYING METHOD UTILIZING ZEOLITE PARTICLES IN A FLUIDIZED BED SYSTEM. Corn (Zea mays L.) representing important food requirement besides paddy and wheat. Handling of time after rice harvest become the priority so that corn quality can be awaked better. Drying process by adsorption-fluidized bed become a choice to replace the conventional corn drying systems. This research aim to look for the effect of the inlet air temperature, type of zeolite, and ratio of corn and zeolite to drying rate, content of protein and fat, and to calculate dying rate constant, k. Energy efficiency is calculated based on amount of heat is used to evaporate the water from corn (Qevap) divided by total of heat requirement for the regeneration of zeolite and increase the air temperature (Qintr). This research conducted by mixing zeolite as adsorben with the corn with the certain comparison ratio in the fluidized bed at temperature of 30-50oC. Results of research indicate that the fastest drying rate is marked by biggest water rate degradation that happened at 50oC by zeolite sintetis and ratio of corn and zeolite is 25:75%. Drying rate constant is 0.0303. Protein content degradates from 9.10% to 8.30%, while for the content of fat is constant. Energy efficiency is obtained of 81.23%. Jagung (Zea mays L.) merupakan kebutuhan pangan yang penting selain padi dan gandum sehingga penanganan paska panen menjadi prioritas agar kualitas jagung dapat terjaga dengan baik. Proses pengeringan dengan cara adsorpsi-unggun terfluidisasi menjadi suatu pilihan untuk menggantikan sistim pengering jagung konvensional yang boros energi. Penelitian ini bertujuan untuk mencari pengaruh suhu udara masuk, jenis zeolite, dan rasio berat jagung dan zeolite terhadap kecepatan pengeringan, kandungan protein dan lemak dan menghitung harga konstanta laju pengeringan, k. Untuk keperluan energi dihitung pula efisiensi energi (h) berdasarkan jumlah panas yang digunakan untuk menguapkan air dari jagung (Qevap) dibagi dengan kebutuhan panas total untuk meregenerasi zeolite dan menaikkan suhu udara (Qintr). Penelitian dilakukan dengan mencampurkan zeolite sebagai adsorben dengan jagung dengan rasio perbandingan tertentu dalam suatu unggun yang difluidisasi menggunakan udara pada suhu percobaan 30-50oC. Hasil penelitian menunjukkan bahwa laju pengeringan paling cepat ditandai oleh penurunan kadar air yang paling besar yang terjadi pada suhu 50oC dengan menggunakan zeolite sintetis dan dengan rasio berat jagung dan zeolite adalah 25% : 75%. Nilai konstanta laju pengeringan diperoleh 0,0303. Kadar protein terjadi penurunan dari 9,10% menjadi 8,30%, sedangkan untuk kandungan lemaknya relatif tetap. Hasil perhitungan diperoleh efisiensi energi (h) sebesar 81,23%.

EFEK PENYIMPANAN BIODIESEL BERDASARKAN STUDI KAJIAN DEGRADASI BIODIESEL CPO Silviana Silviana; Luqman Buchori
Reaktor Volume 15 No.3 April 2015
Publisher : Dept. of Chemical Engineering, Diponegoro University

BIODIESEL STORAGE EFFECT BASED ON DEGRADATION OF CPO BIODIESEL Biodiesel denotes as ester mono alkyl of long chain fatty acid such as CPO (crude palm oil) which can biologically degrade more than 98% within three (3) weeks, whereas fossil fuel degrade partially only. The objective of research was to investigate degradation of biodiesel during storage. The scope of this research covered the container design, storage condition, initial analysis of CPO biodiesel, and degradation rate during product storage by using oxidation rate of biodiesel. The results showed that there was degradation on CPO biodiesel during product storage. It can be seen from increasing of acid value and saponification number, decreasing of iodine number, increasing of total glycerol value, and decreasing of ester number in biodiesel product. Storage period prediction of biodiesel can be approached by using equation, i.e. ????=0.0012????2−0.0052????+0.0609. In this research, the maximum storage period of CPO biodiesel achieved at 27 weeks. Other result showed that well storage was achieved with closed-galvanized container.Keywords: biodiesel; CPO; degradation; storage period AbstrakBiodiesel merupakan ester mono alkil dari asam lemak rantai panjang, seperti CPO (crude palm oil) yang terdegradasi lebih dari 98% secara biologi dalam 3 minggu, sedangkan bahan bakar diesel hanya terdegradasi sebagian. Penelitian ini bertujuan untuk mengamati proses degradasi biodiesel selama masa penyimpanan. Penelitian ini meliputi rancangan tangki biodiesel, kondisi penyimpanan, analisa awal biodiesel, dan studi laju degradasi pada tahap penyimpanan produk dengan ditelaah laju oksidasi pada biodiesel.Hasil penelitian menunjukkan bahwa selama periode proses penyimpanan terjadi proses degradasi biodiesel. Hal ini terlihat dari hasil analisa yang menunjukkan bahwa terjadi kenaikan angka asam selama proses penyimpanan, kenaikan angka penyabunan, penurunan bilangan iodine, kenaikan kadar gliserol total dan penurunan kadar ester di dalam biodiesel. Prediksi periode penyimpanan biodiesel dapat didekati dengan persamaan ????=0,0012????2−0,0052????+0,0609. Dari persamaan tersebut diperoleh bahwa periode maksimal penyimpanan biodiesel adalah 27 minggu. Hasil penelitian juga menunjukkan bahwa penyimpanan biodiesel CPO yang paling baik adalah dengan menggunakan bahan galvanized dengan kondisi penyimpanan yang tertutup.

UPAYA PENINGKATAN MUTU DAN EFISIENSI PROSES PENGERINGAN JAGUNG DENGAN MIXED-ADSORPTION DRYER Luqman Buchori; Mohamad Djaeni; Laeli Kurniasari
Reaktor Volume 14, No. 3, APRIL 2013
Publisher : Dept. of Chemical Engineering, Diponegoro University

THE EFFORT OF EFFICIENCY AND QUALITY IMPROVEMENT ON CORN DRYING PROCESS USING MIXED-ADSORPTION DRYER. The main problem in corn drying process is the low of energy efficiency (50%) and quality products. Consequently, operating costs in large for fuel consumption and the short shelf life of corn. Zeolite adsorption dryers have the potential to overcome this problem. This research aims to study composition of corn-zeolite and the effect of temperature on drying speed and protein and fat content in corn. Research variables are the ratio of corn and zeolite (1:0, 1:3, 1:1, 3:1) and intake air temperature (room temperature, 30oC, 40oC, 50oC). Sampling for moisture testing performed every 15 minutes. For energy purposes also calculated the energy efficiency (h) based on the amount of heat used to evaporate water from the corn (Qevap) divided by the total heat requirement to regenerate the zeolite and raising the air temperature (Qintr). Profiles of temperature and water in the mixed adsorption dryer are also studied. The results showed that the greater number of zeolite used, the water content of the final outcome a little more drying, protein and fat content of the final result of drying is relatively constant. The larger intake air temperature, the water content of the less drying results, protein content decreases, and the fat content does not change/relatively constant. The best variable was a ratio of corn: zeolite is 1:3 and air temperature was 50oC. While the variables that are suitable and in accordance with ISO standards for dry foods (14%) are air temperature of between 40oC and 50oC with a ratio of corn:zeolite is 1:3. The energy efficiency of 81.23% is obtained. Modeling done with FEMLAB (COMSOL) can describe the moisture content and temperature profiles in the corn and zeolite. Keywords: corn; drying; energy efficiency; mixed adsorption dryer; zeolite Abstrak Masalah utama proses pengeringan jagung adalah rendahnya efisiensi energi (50%) dan mutu produk sehingga beban biaya operasi besar untuk konsumsi bahan bakar. Pengering adsorpsi dengan zeolite berpotensi untuk mengatasi permasalahan ini. Penelitian ini bertujuan untuk mempelajari pengaruh komposisi jagung-zeolite dan suhu terhadap kecepatan pengeringan dan kandungan protein dan lemak di dalam jagung. Penelitian dilakukan dengan variabel berubah yaitu rasio antara jagung dan zeolit (1:0, 1:3, 1:1, 3:1) dan suhu udara masuk (suhu kamar, 30oC, 40oC, 50oC). Pengambilan sampel untuk pengujian kadar air dilakukan setiap 15 menit. Untuk keperluan energi dihitung pula efisiensi energi (h) berdasarkan jumlah panas yang digunakan untuk menguapkan air dari jagung (Qevap) dibagi dengan kebutuhan panas total untuk meregenerasi zeolit dan menaikkan suhu udara (Qintr). Profil temperatur dan air di dalam mixed adsorption dryer juga dipelajari. Hasil penelitian menunjukkan bahwa semakin banyak jumlah zeolit yang digunakan, kadar air hasil akhir pengeringan makin sedikit, kadar protein dan lemak hasil akhir pengeringan relatif konstan. Semakin besar suhu udara masuk pengering, kadar air hasil pengeringan makin sedikit, kadar protein semakin menurun, dan kadar lemak tidak berubah/relatif konstan. Variabel yang terbaik adalah variabel dengan rasio jagung:zeolit yaitu 1:3 dan menggunakan suhu udara pengering 50oC. Sedangkan variabel yang cocok dan sesuai dengan standar SNI untuk makanan kering (14%) adalah variabel dengan menggunakan suhu udara pengering antara 40oC dan 50oC dengan rasio berat jagung : zeolit adalah 1:3. Efisiensi energi diperoleh sebesar 81,23%. Pemodelan yang dilakukan dengan Femlab (COMSOL) dapat menggambarkan profil kandungan air dan suhu di dalam jagung dan zeolit. Kata kunci : jagung; pengeringan; efisiensi energi; mixed adsorption dryer; zeolit

Co-Authors . Widayat Amin Nugroho Anggun Kurniawan Anindita Indriana Aprilina Purbasari Ardian D. Yudhistira Aris Bagus Pradana, Aris Bagus Arman, Mhd. Adithia Perdana Arum Sakti Prasetyo Astrilia Damayanti B Budiyono Berkah Fajar Bintang Ayu Kalimantini Boby Gusman Irianto Samosir Budi Sasongko Setia Budiyono Budiyono Chusnul Khotimah Dewi Fatmawati Didi D. Anggoro Didi D. Anggoro Didi Dwi Anggoro Dinda Labibah Ubay Dyah Hesti Wardhani Dyah Hesti Wardhani Fachmy Adji Pangestu Setiawan Faleh Setia Budi Faleh Setia Budi Faleh Setia Budi Fegi Yuliandri Fradriyan Aulia Giveni Christina Silaen Hadiyanto Hantoro Satriadi Hargono Hargono Harum Nissaulfasha Herawati Oktavianty Heri Cahyono Heru Susanto I Nyoman Widiasa I. Istadi I.G.B Ngurah Makertihartha Indro Sumantri Inshani Utami Istadi Istikhoratun, Titik JD Ryan Christy S Khonsa Syahidah Kusmiyati Kusmiyati Laeli Kurniasari M. Dani Supardan M. Dani Supardan M. Djaeni Maria Augustine Graciafernandy Meitiandari Mutiara Mhd. Shaumi Al Anshar Muhamad, Theobroma Guntur Muhammad Ulil Absori Nadia Taradissa Maheswari Ndaru Okvitarini Ngadi, Norzita Nita Aryanti Norzita Ngadi Nur Hidayati Nurjati Solikhin Nurul Aishah Aishah Nurushofa, Faustina Alda Okryreza Abdurrachman P Purwanto Pakpahan, Agnes J. Pakpahan, Andre W. S. Pratama, Pambudi Pajar Pratama, Wahyu Diski Pratiwi, Wahyu Zuli Purwanto Purwanto Purwanto Purwanto Putri Diliyan Shakti Ratnawati Ratnawati Resti Nur Utami Riko Rikardo Putra Riyanto, Teguh Rizki Andre Handika, Rizki Andre Roikhatus Solikhah Salsabila, Unik Hanifah Saputra, Roni Ade Setia Budi Sasongko Setia Budi Sasongko Setiadi, Iqfan Dwi Silviana Silviana Siswo Sumardiono Suherman Suherman Suherman Suherman Sulardjaka Sulardjaka Sulardjaka, S Syarief, Elijah Teguh Riyanto Teuku Irfan Maulana Titik Istirokhatun Udin Mabruro Wahyu Fitriani Widayat Widayat Widayat Yayuk Astuti Yazid Bindar Yazid Bindar Yudha Duta Utama

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