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All Journal ASEAN Journal of Systems Engineering Buletin Peternakan Jurnal Rekayasa Proses Reaktor Jurnal Ilmu Lingkungan JURNAL TEKNOLOGI LINGKUNGAN Jurnal Bahan Alam Terbarukan Eksergi: Chemical Engineering Journal Jurnal Ketahanan Nasional Seminar Nasional Teknik Kimia Kejuangan Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) Jurnal Pamator : Jurnal Ilmiah Universitas Trunojoyo Madura Majalah Kulit, Karet, dan Plastik Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Sains & Teknologi Lingkungan Konversi Metal Indonesia Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Communications in Science and Technology Jurnal Rekayasa Proses Jurnal Ilmiah Pendidikan dan Pembelajaran Media Ilmiah Teknik Lingkungan Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan INSIST (International Series on Interdisciplinary Research) Jurnal Inovasi Teknik Kimia Jurnal Engine: Energi, Manufaktur, dan Material ASEAN Journal of Chemical Engineering Kontribusia : Research Dissemination for Community Development Jurnal Riset Entrepreneurship GANDRUNG: Jurnal Pengabdian Kepada Masyarakat Jurnal Pengendalian Pencemaran Lingkungan (JPPL) Sosial : Jurnal Ilmu-Ilmu Sosial Community Empowerment Prosiding SNAST International Journal of Computer and Information System (IJCIS) Teknika STTKD: : Jurnal Teknik, Elektronik, Engine Envirotek : Jurnal Ilmiah Teknik Lingkungan Sharia Agribusiness Journal Journal of Educational and Cultural Studies Hexagon DEDIKASI : Jurnal Pengabdian Kepada Masyarakat Jurnal Edukasi Pengabdian Masyarakat: EDUABDIMAS Revenue Manuscript Jurnal Rekayasa Proses Jurnal Pengabdian, Riset, Kreativitas, Inovasi, dan Teknologi Tepat Guna (Parikesit) Educational Management
Agus Prasetya
Universitas Gadjah Mada
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Journal : ASEAN Journal of Systems Engineering

 1 
PEMANFAATAN ZEOLIT DIAKTIFKAN DENGAN LARUTAN ASAM UNTUK PEMURNIAN BIODIESEL Muhammad Hidayat Furqon; Agus Prasetya; Wahyu Wilopo
ASEAN Journal of Systems Engineering Vol 1, No 1 (2013): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Utilization of zeolite activated by acid solution for biodiesel purification has been done. This research is conducted to find the mechanism of biodiesel purification from catalyst with activated zeolite, the effectiveness of the activated zeolite of various particle size, soaking time and purification temperature, the economic feasibility of biodiesel production by using this method and the more economical method by comparing the cost and performance of biodiesel purification using activated zeolite and using water and acid solution.This research has used cooking oil, methanol and sodium hydroxide to make biodiesel, sulfuric acid as activator and zeolite from Gunung Kidul which is filled into wash column with support from vacuum pump to purify biodiesel. The variable of the research is particle size of zeolite among others: 12 mesh <De< 20 mesh, 20 mesh <De< 40 mesh and 40 mesh <De< 80 mesh, soaking time 0, 15 minutes, 30 minutes, 1 hour and 2 hours, and purification temperature 27oC, 40oC and 60oC.Mechanism of activated zeolite for purifying biodiesel from catalyst has been investigated that activated zeolite is using the absorption rate where catalyst will fill the empty pores of zeolite and its cation exchange capacity where it will exchange cation in zeolite surface with cation of catalyst so that zeolite can purify the unwashed biodiesel from catalyst. Optimization of biodiesel purification using zeolite activated by acid solution method can be achieved with particle size of the zeolite 20 mesh <De< 40 mesh, 30-minute soaking time and purification temperature at 27oC. Economic analysis of the use of zeolites in the optimum condition within one year resulted Payback Period 8.68 months, Benefit Cost Ratio 1.86, Net Present Value Rp 431,173,257.44 and Return of Investment -138 % and the use of zeolite activated by acid solution more economical than the use of water and acid solution as purifying biodiesel because of cost savings can be made up to 86% of method of using water and acid solution.
HIGH THROUGHPUT STUDIES OF HYDROGEN EVOLUTION ELECTROCATALYST FOR WATER ELECTROLYSIS Radwinda Kurnia Putri; Brian Hayden; Agus Prasetya; Sihana -
ASEAN Journal of Systems Engineering Vol 1, No 2 (2013): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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This thesis presents a study of hydrogen evolution electrocatalyst for alkaline water electrolysis. Hydrogen production through the electrolysis of water requires the development of new electrocatalysts in order to reduce the hydrogen evolution over-potential of the cathode in order to make water electrolysis more competitive and efficient. An alternative approach in the optimisation of water splitting electrocatalyst may Be the modification of the metal electrocatalytic behaviour by supporting nano-particles on oxide support. Development of the electrocatalyst material for hydrogen evolution reaction in alkaline electrolyte may obtain more stable hydrogen evolution reaction.Pt on TiO2 electrocatalyst has been synthesized by applying high throughput Physical Vapor Deposition (HT PVD) method. Electrochemistry measurements of Pt on TiO2 have been used to study the characteristic and stability of the electrocatalyst for hydrogen evolution reaction in alkaline electrolyte for water electrolysis. XRD confirmed that the phase of TiO2 were amorphous and anatase after annealing for 6 hours at the temperature of 450oC. The thicknesses of TiO2 both for amorphous and anatase were 200 nm.Similar electrocatalytic behavior are presented both for Pt on amorpous TiO2 and Pt on anatase TiO2 from electrochemistry measurements using cyclic voltammetry and potential step on the 10 x 10 E-chem arrays in alkaline electrolyte (0.5 M NaOH). Higher currents are seen in the larger particle size of platinum in TiO2 both for amorphous and anatase phase. The hydrogen evolution reaction starts at the potential below -0.8 V vs RHE. The potential for hydrogen evolution reaction is shifted to the low potential. Larger particle size of platinum shows lower potential of hydrogen evolution reaction.Pt on TiO­2 tends to be a stable electrocatalyst for hydrogen evolution reaction in alkaline water electrolysis. It is because hydrogen evolution reaction occurs at low potential. Anatase phase of TiO­2 is more stable than amorphous TiO2, hence, Pt on anatase TiO­2­ could be better than Pt on amorphous TiO­2 for hydrogen evolution reaction in alkaline water electrolysis.
DESAIN BIOBALL BERBAHAN KOMPOSIT BULU AYAM-RESIN POLYESTER: SIFAT MATERIAL, KARAKTERISTIK BENTUK DAN KARAKTERISTIK HIDRAULIK Ruslim Budianto; Agus Prasetya; Mudjijana -
ASEAN Journal of Systems Engineering Vol 1, No 2 (2013): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Abstract

Chicken Feather is main waste product of chicken processing as food, however it has a good potential for used in composite material. Material stiffness increase caused by hydrophobic Keratin which is contained in chicken feather both feather quill and feather fiber. Composite material as biofilter media potentially used to improve effectively of septic tank.  The study was conducted to determine the effect of chicken feather fiber adding on density, impact strength and flexural strength of polyester composite, with addition of 10%, 15%, 20%, and 25% of feather fiber as variable. The best composition by mechanical test applied as biofilter material (bioball). Bioball characteristic was investigated to give some parameters used in wastewater treatment design, such as porosity of media, specific surface area, and density of bed media, spherical factor and biomass accumulation capacity. The parameters investigated in each bioball media with wide of bioball’s wall gap are 2 mm, 3 mm and 4 mm as variable.         Chicken feather fiber composite has been used as bioball material provided light material 1,124 gr/cm3 in density. Increase in material strength was obtained by adding chicken feather fiber, bioball have been made has 44.291 MPa in maximum flexural strength and 5,781 kJ/cm2 in maximum impact strength. Bioball which has casted 5 cm in diameter, divided into three of types; bioball 2 (wall space 2 mm), bioball 3 (wall space 3 mm) and bioball 4 (wall space 4 mm). Bioball have been made has 260-369 cm2/cm3 of specific surface are and 0.78-0.83 of porosity. Based on spherical factor calculation bioball was more similar to parallel plate than rounded shape. Overall the shape was not rounded with spherical factor value between 0.23-0.358. Bioball 2 has the highest biomass capacity. Based on the test, biomass accumulation capacity of bioball 2 was up to 7.0 kg/m3 with estimation of backwashing time is every 20 hours.
MODIFIKASI SISTEM DESTILASI MINYAK ATSIRI DAUN SIRIH (PIPER BETLE LINN) DENGAN PENERAPAN VOLUME AIR REBUSAN KONSTAN Widodo -; Agus Prasetya
ASEAN Journal of Systems Engineering Vol 2, No 1 (2014): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Abstract

Most of the cultivation of essential oils, done with the process of distillation such as water distillation systems, direct steam distillation and steam boiler distillation. And was developed on a small/medium scale industry throughout the archipelago.In the process of water distillation, the flow rate and level of oil transport are determined by the ratio of raw materials volume versus distillations water volume. Later on, affected by the steam temperature as well. Both were influenced by the vapor pressure inside the boiling tank, which will determine the level of vapor saturation of oil to be transported.Modifiying the distillations process with applying a control tank to avoid decreasing of distillations watter during the process, with increasing the steam pressure, has successfully improove the oil transports until its optimum rates.By ratio of 4:1 with increasing steam pressure up to 0.3 kgf/cm2, has affecedt to incresing the steam temperature and the rate of oil transport, there for iproofing the yield from 0.44% to 0.71% by total of 80 l water condensate.
STUDY OF CHARACTERISTICS OF GASIFICATION PROCESS OF VARIOUS BIOMASS IN A DOWNDRAFT GASIFIER Agus Aktawan; Agus Prasetya; Wahyu Wilopo
ASEAN Journal of Systems Engineering Vol 3, No 1 (2015): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Abstract

Biomass gasification is an endothermic reaction process for converting biomass into syngas, occurs at high temperatures with limited oxygen. Knowing the temperature profile of biomass gasification wood charcoal, coconut shell charcoal and coconut shell, rice husk and woodchip and seek optimal results from gasification of biomass are the purpose of the research.The equipment in this research consisted of; gasifier as the main tool with 4 temperature sensors, two cyclones for tar and dust separator, cooler to refrigerate and filter containing biomass as a catcher of dust and tar from the syngas. Research start by ignite the biomass in the gasifier, the air flows by blower and the syngas came out after the filter. Research variabel are variation of biomass types mentioned above and variation of shell and coconut shell charcoal mixing. Observations were made up until the biomass in the gasifier did not produce syngas, characterized by gas results could not burn.The results of the temperature profile of gasification of various types of biomass shows that the syngas appeared in the early minutes (2 minutes until the 5th) on the gasification, such as gasification coconut shell, woodchip, rice husk. Syngas of coconut shell charcoal is 2,825% w/w of biomass and can burn for 19 minutes and resulted in 1,92% ash and 29,57% charcoal. Syngas of mixture 25% shell and 75% coconut shell charcoal is 5,013% w/w of biomass and can burn for 30 minutes and resulted in 1,61% ash and 5,1% charcoal.
DESAIN SISTEM INSTRUMENTASI PROSES DISTILASI FRAKSINASI BATCH BERBASIS KENDALI SUHU Muhammad Arman; Agus Prasetya; Sihana -
ASEAN Journal of Systems Engineering Vol 2, No 2 (2014): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Abstract

Distillation column is a column that is widely used in both large industry and small and medium industries. Use of distalasi column on small and medium industries such as the distillation of essential oils. In the subsequent use of the distillation column used for purification or further process to obtain a higher quality product in the form of multstage distillation. In the process of multistages distillation,  temperature is an important component in the process, because of that controls the temperature has an important role. Temperature controllers available today are manual, which causes frequent inaccuracy of the distillation process, resulting in low product quality. Therefore automatic temperature control is required.In this thesis, instrumentation system of fractionation distillation process based of temperature control are designed. The design process notice the six important  point temperature in the distillation process, using a thermocouple as a temperature sensor, and LM35 as the cold junction temperature,  the 6218 USB as Data Acquisition Board, and the software LABVIEW 2010.The instrumentation system programming, displays the temperature from time to time at intervals of one second, the temperature statistics (min, max and average) as well as measurement results table. The program also features a choice (shaped slider) to  set the temperature for a flexible batch process. The response characteristics of the instrumentation system is less than one second, both in displaying measured data, response indicator, display graphs, and data tables. The instrumentation system is also designed to regulate the flow rate of the cooling water and container replacement indicator for each product distillation.
CHARACTERISTICS OF PYROLYSIS OIL BATCH POLYETHYLENE AND POLYSTHYRENE PLASTIC WASTE AT VARIOUS TEMPERATURES Indah Noor Dwi Kusuma Dewi; Agus Prasetya; Supranto -
ASEAN Journal of Systems Engineering Vol 3, No 2 (2015): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Abstract

Efforts are being carried out in order to utilize polyethylene (PE) and polystyrene (PS) plastic waste by converting them into fuel or oil. One technology that can be used is pyrolysis. This study aims to (1) determine the quantity and the characteristics of oil from the results of pyrolysis polyethylene (PE) and polystyrene (PS) plastic waste at various temperatures which include characteristics of physics (specific gravity, heating value, flash point, pour point, and kinematic viscosity) and chemical characteristics (composition compounds in oil), (2) determine the optimal conditions of process pyrolysis related to the quality and quantity of oil by pyrolysis, and (3) determine the potential treatment of PE and PS plastic waste by pyrolysis method.The materials used in this study were the type of polyethylene (plastic bags) and polystyrene/styrofoam (for fruits or vegetables) plastic waste. The selected temperature variations are T = 400oC, 450oC, and 500oC. Pyrolysis oil was weighed and measured its volume to obtain v/wo and yield.The results showed that the quantity of pyrolysis oil from polyethylene (PE) plastic waste at temperatures of 400, 450, and 500oC based on v/wo (ml/g) respectively were 0.3429 ml/g; 0.5129 ml/g; and 0.199 ml/g while the results of polystyrene (PS) plastic waste at temperatures of 400, 450, and 500oC respectively were 0.89 ml/g; 0.905 ml/g; and 0.915 ml/g. The results of pyrolysis oil based on yield of polyethylene (PE) plastic waste at temperatures of 400, 450, and 500oC respectively were 33.33 wt%; 38.61 wt%; and 15.55 wt% while polystyrene (PS) plastic waste at temperatures of 400, 450, and 500oC respectively were 80.94 wt%; 79.79 wt%; and 80.14 wt%. While the characteristics shown by the results of pyrolysis oil from PE plastic with a temperature of 400oC were closer to kerosene while at temperatures of 450 and 500oC were closer to the characteristics of diesel fuel. As for pyrolysis oil results of PS plastic with temperatures of 400, 450, and 500oC were closer to the characteristics of gasoline. Optimal conditions of pyrolysis oil related to the quantity of pyrolysis of PE plastic at a temperature of 450oC was obtained when the highest of v/wo and yield respectively were 0.5129 ml/g and 38.16 wt%, while for the pyrolysis of PS did not have any optimal conditions. For, oil produced was relatively constant despite the increasing temperatures. Based on technical analysis, handling PE and PS plastic waste using pyrolysis methods provides benefits to society making it feasible to do.
COMPARISON OF ABILITY PO4 AND NH3 DECREASE IN HOSPITAL WASTEWATER USING PHYTOREMEDIATION BATCH WITH EICHHORNIA CRASSIPES AND AZOLLA PINATA AM Lelie Novia W; Wahyu Wilopo; Agus Prasetya
ASEAN Journal of Systems Engineering Vol 4, No 2 (2020): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Abstract

Hospital operations have the potential to produce waste, especially wastewater, which can cause environmental pollution. Therefore it is necessary to control the disposal of liquid waste that is discharged into the environment. It is required to reduce the pollution of wastewater management is excellent and appropriate legislation. Research methodology starts from the data observed laboratory test results for samples of hospital wastewater. From these data, it is known that the levels of phosphate and ammonia still do not meet quality standards following the Decree of the Minister of Environment No. 58 of 1995 regarding effluent standards for hospitals. Further research is limited only focused on decreased levels of phosphate and ammonia in hospital wastewater.Data research includes a phosphate concentration of outlets as a pilot study. The subsequent wastewater will be divided into seven-bath, three-bath containing wastewater and water hyacinth plants with a density different in each basin ie density of 60 mg/cm2, 90 mg/cm2, and 120 mg/cm2, three baths containing hospital wastewater and Azolla plant density of each tub 60 mg/cm2, 90 mg/cm2, 120 mg/cm2, and the control tanks containing wastewater without a given crop. Based on the results obtained, phosphate levels can meet the fastest quality standards for four days on a tub of hospital wastewater and water hyacinth with a density of 120 mg/cm2 and all of a tub of wastewater hospitals and Azolla. For ammonia takes the fastest four days, this happens in a tub filled with water hospital waste, and water hyacinth with a density of 120 mg/cm2 and the entire tub of wastewater hospitals and Azolla.
STUDY OF GREYWATER REUSE SYSTEM WITH LOCAL MATERIAL FILTER Stenly Recky Bontinge; Agus Prasetya; Budi Kamulyan
ASEAN Journal of Systems Engineering Vol 5, No 1 (2021): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Abstract

The abundant supply of greywater as domestic waste becomes an opportunity for further processing and can be reused as water (reuse) instead of consumption (eating and drinking). Every day as much as 60% of greywater is wasted as a by-product of human consumption. Filtration using local media becomes the treatment option. The size of the greywater particles ranges from 10 μm to 100 μm. The filter media size is made into two levels i.e., 80 mesh (active zeolite and charcoal) and mesh 18 (active sand) to filter particles by ten μm and mesh 14 (zeolite and activated charcoal) and mesh 10 (activated sand) to filter the particle size of 53 μm. The combination of filter media thickness in three experiments took one of the filter media to be used in each experiment. Each experiment will be used one filter media with a thickness of 50 cm and 25 cm each for supporting filter media, with a total media thickness of 100 cm.All of the above become independent variables in research. While the dependent variable is water quality standard in accordance PP. 82 the year 2001 with the main parameters are BOD, COD, TSS, pH, and detergent. The flow rate is set at 24.55 ml / m2 min. Besides the quality standard, the research still refers to cost efficiency and processing time (filtration). All variables consist of 6 filters that give different results; in laboratory test control, only pH fulfills the quality standard of PP. 82 of 2001. This study provides the best combination of filter media in A filter with BOD presentation: 82%, COD: 85%, TSS: 99%, and 98% detergent with the fastest contact time of 2700 seconds. The resulting effluent placed TSS and detergent parameters below the quality standard threshold with TSS values ranging from 15-24 mg / l, while the detergent content was in the range of 14.828 - 42.37 mg / l.
Co-Authors Adriyanti, Dwi Tyaningsih Adythia, Dicky Marsa Agus Aktawan Ahmad Tawfiequrrahman Yuliansyah Ai Siti Patimah Alfiana Adhitasari AM Lelie Novia W Ambar Pertiwiningrum Angge Dhevi Warisaura Anggun Rahmada Anggun Rahmada Ani Anjarwati Anjarwati, Ani Anshori, Shodiq Anton Sujarwo, Anton Aries Kurniawan Arif Rahman Hakim Arifudin Idrus Armaidy Armawi Asih, Yekti Asri, Wuwuh Astri Senania, Astri Aswati Mindaryani Awaluddin Nurmiyanto, Awaluddin Bagus Putro Budi Utomo Bengt Andersson Beni Dwi Komara Bidhari Pidhatika Brian Hayden Budi Kamulyan Cahyono, Rochim Bakti Chandra Wahyu Purnomo Dagus Resmana Djuanda Deden Ependi Dewi, Anggra Lita Sandra Dewi, Anggralita Sandra Dian Hudawan Santoso Dwi Sambada Dwi Saputri Dwi Saputri Edhi Martono Edia Rahayuningsih Erlambang, Erlambang Erlina Kurnianingtyas Erna Astuti Fadlilah, Ilma Fadliyah, Nurul Faishal, Faris Amir Fajar Marendra Fajar Marendra Fajar Marendra Fajar Marendra Farid Ma'ruf Felix Arie Setiawan Ferian Anggara Fitri Nur Kayati, Fitri Nur Hakim, Gilang Lukman Halomoan Siagian haries handoyo Hary Sulistyo Haryanto, Imam Hasanah, Nur Hayati Heimbach, Ivano Heri Cahyo Bagus Setiawan Hidayatunnisa, Nurul Fadhlya Himawan T. B. M. Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Himawan Tri Bayu Murti Petrus Hotden Manurung I Made Bendiyasa I Made Bendiyasa I Wayan Warmada Iga Maliga Ilham Ilham Ilma Fadlilah Ilma Fatimah Yusuf Iman Haryanto Indah Noor Dwi Kusuma Dewi Indra Perdana Indra Perdana Indra Perdana Juli Muwarni, Juli Kevin Cleary Wanta Kirana Dipta Rakhmasari Kisnanto, Indro Kristanto, Jonas Krister Ström Latukismo, Tatag Herbayu Lukman Subekti Mahfudl Sidiq Muhayyat Marendra, Fajar Maria Ratih Puspita Liestiono Marjan Bato Martha Helsanggi Maulana Gilar Nugraha Milawati Milawati Mochamad Syamsiro Mudjijana Mudjijana - Muh. Wahyu Syabani Muhammad A. A. Ramadhan, Muhammad Muhammad Arman Muhammad Hidayat Furqon Muhammad Sholeh MUHAMMAD SHOLEH Muhammad Sigit Cahyono Muhammad Sulaiman mulhidin, mulhidin Muqorobin, Muqorobin Mustakim, Zainal Mustika, Pra Cipta Buana Wahyu Natalia, Priskila Novie Putri Setianingrum Novie Putri Setianingrum Nuzulul Fatimah Oktaviani Nisa Hanafiah Panut Mulyono Prasakti, Laras Puji Astuti Purwantiningsih, Ary Purwanto, Abdul Fattah Bima Radwinda Kurnia Putri Rahmawati, Merza Rikhanatul Firdausy Puspitasari Rikhanatul Firdausy Puspitasari Rima Dewi Anggraeni Rizka Lestari Rizki Laksono, Rizki Rochim B. Cahyono Rochmadi Rochmadi Rochmadi Ruslim Budianto Salafudin Salafudin, Salafudin Saputri, Dwi Sarah Nabila Salma Sartika, Heni Wahyu Sarto Sarto Sarto Sarto Sarto Sarto Sarto Sarto Satria, Arysca Wisnu Satryo Dewanto Suryohendrasworo Setiawan, Heri Cahyo Agus Sholihatunnisa, Hanifa Afifia Sholikhati, Amalia Putri Sigit Heru Murti Sihana - Sihana - Siswanto, Romi Siti Helmyati Siti Nurul Aisyiyah Jenie, Siti Nurul Aisyiyah Siti Syamsiah Slamet Sumardi, Slamet Stenly Recky Bontinge Sudaryatno Sudaryatno Sujoto, Vincent Sutresno Hadi Sulistiyono Sulistiyono Suparti Suparti Suparti Supranto - Supranto Supranto Supriyatna, Yayat Iman Surami, Wuwuh Asrining Suryanaga, Edward Chandra Sutijan Suyanti Suyanti Tapiory, Jesica Teguh Ariyanto Teguh Ariyanto Timotius, Daniel Titik Indrawati Tri Winarni Soenarto Putri Ula, Rahmah Arfiyah Ulan Paluti Agustina Ummah, Maslacatul Wahyu Wilopo Warmita, Helena Karunia Wibowo, Decka Pynka Widi Astuti Widi Astuti Widodo - Widya Rosita Winarni, Marti Winoto, Gilbert Yogihaz, Billy Dion Yuni Kusumastuti, Yuni Zaizamshimi Nurul Farah Dyana