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Efektifitas Penggunaan Metode Vacuum Crystalization untuk Proses Pembuatan Ammonium Nitrat dari Amonia dan Asam Nitrat Rangga, Yanu Dewa; Cahyono, Aris; Dewantoro, Agus Fajar; Anggraini, Sinar Perbawani Abrina; Mediaswanti, Kun Aussieanita
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 6 (2023): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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The pre-design of an ammonium nitrate plant from nitric acid and ammonia provides excellent prospects to meet the needs of ammonium nitrate in Indonesia. The purpose of this study is todetermine effective and efficient methods in the design of ammonium nitrate manufacturing using several methods such as prilling process, vacuum crystallization, stengel, and grainer process. It is explained that from some of the methods above, the vacuum crystalization method, has advantages over other methods, which is evident from the water content of the product produced is 0.1% and the yield produced reaches 99.9%. In addition, in this process the yield produced is high, the process will minimize operational costs and efficiency in the investment of equipment used is quite large. When compared to other processes, this process can result in increased revenue Abstrak Pra rancang bangun pabrik ammonium nitrat dari asam nitrat dan amonia memberikan prospek yang sangat baik untuk memenuhi kebutuhan ammonium nitrat di indonesia. Tujuan penelitian ini adalah untuk menentukan metode yang efektif dan efisien dalam rancang bangun pembuatan amonium nitrat dengan menggunakan beberapa metode seperti proses prilling, vacuum crystalisasi, stengel, dan proses grainer. Dijelaskan bahwa dari beberapa metode di atas, metode vacuum crystalisasi, memiliki keunggulan daripada metode lainnya yaitu terbukti dari kandungan air produk yang dihasilkan adalah 0,1% dan rendemen yang dihasilkan mencapai 99,9%. Selain itu dalam proses ini yield yang dihasilkan tinggi, proses yang mudah akan memperkecil biaya operasional dan efisiensi dalam investasi peralatan yang digunakan cukup besar. Jika dibandingkan dengen proses lainnya proses ini dapat menghasilkan peningkatan pendapatan.

Pembuatan Asam Asetilsalisilat dari Asam Salisilat dan Asetat anhidrat Menggunakan Proses Sintesis Kalsium Oksida Dengan Reaktor Sebagai Alat Utama Simbolon, Devi Veronika; Yuniningsih, Susy; Ma'sum, Zuhdi
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 6 (2023): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Acetylsalicylic acid is a corrosive that relieves pain and lessens discomfort. Sometimes people refer to acetylsalicylic acid as a headache medication. In addition to calcium oxide acting as a supporting specialist and corrosive killing specialist, the dynamic element of acetylsalicylic corrosive is called acetylsalicylic corrosive, which is an engineered subordinate of the compound salicin. It responds with anhydrous acidic corrosive and salicylic corrosive in a stoichiometric proportion. When calcium oxide (CaO) is used, the yield of acetylsalicylic acid is nearly 100% (the maximum amount of free salicylic acid is 2%), and calcium acetic acid is produced. It is a one-pot, exothermic, rapid, and contamination-free reaction. Acetylsalicylic corrosive is produced by mixing acidic anhydrous and salicylic corrosive with calcium oxide. The Short Cylinder That Rises 98% of the chemicals used in the filtering process are acetylsalicylic acids in the evaporator. The main device used is the reactor. The reactor can think acetylsalicylic corrosive while operating at 70°C and 1 atm. The reactor's memorised limit is 331.3031 kg/hour. Financial evaluation findings ROIbt (return on venture) = 48%, ROIat (return on investment) = 43%, Pay Out Season = 1.78 years, BEP (return on original investment) = 31.93%, SDP (shut down point) = 14.74%, and IRR (internal rate of return) = 20.93%. Abstrak Asam asetilsalisilat bersifat asam yang mengurangi rasa sakit dan mengurangi ketidaknyamanan. Selain kalsium oksida yang berperan sebagai zat pendukung dan zat pembunuh asam, unsur dinamis asam asetilsalisilat disebut asam asetilsalisilat, yang merupakan turunan rekayasa dari senyawa salisin, merespons dengan asam asam anhidrat dan asam salisilat dalam proporsi stoikiometri. Ketika kalsium oksida (CaO) digunakan, hasil asam asetilsalisilat hampir 100% (jumlah maksimum asam salisilat bebas adalah 2%), dan kalsium asam asetat dihasilkan. Ini adalah reaksi satu pot, eksotermik, cepat, dan bebas kontaminasi. Asam asetilsalisilat diproduksi dengan mencampurkan asam anhidrat dan asam salisilat dengan kalsium oksida. Silinder Pendek Yang Naik 98% bahan kimia yang digunakan dalam proses penyaringan adalah asam asetilsalisilat di evaporator. Alat utama yang digunakan adalah reaktor. Reaktor dapat berpikir asetilsalisilat asam saat beroperasi pada 70°C dan 1 atm. Batas hafalan reaktor adalah 331,3031 kg/jam. Temuan evaluasi keuangan ROIbt (return on venture) = 48%, ROIat (return on investment) = 43%, Pay Out Season = 1,78 tahun, BEP (return on original investment) = 31,93%, SDP (shut down point) = 14,74% , dan IRR (tingkat pengembalian internal) = 20,93%.

Analisa Ekonomi Pendirian Pabrik Arang Aktif dari Biji Salak Handoko, Rinto Erwin; Anggraini, Sinar Perbawani Abrina; Mediaswanti, Kun Aussieanita
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 6 (2023): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Demand for activated charcoal in Indonesia is increasing along with advances in technology and industry in this country. This increasing need must be supported by researchers and entrepreneurs working in the field of activated charcoal to produce activated charcoal that is good in terms of quality and quantity. To meet domestic demand, this activated charcoal factory was established. The aim of this research is to determine the feasibility of establishing an activated charcoal factory based on economic analysis. Production capacity in the factory establishment is planned to be 9,000 tons / year. This factory operates 300 days a year. An activated charcoal factory is planned to be built in Malang Regency, East Java Province in 2026. The main tool used in building an activated charcoal factory from salak seeds is a mixer. Process utilities include the supply of process water, electricity, cooling water and fuel. Return On Investment (ROI) before tax 87% and after tax 79%. Pay Out Time (POT) 1.2 years, Break Event Point (BEP) 39.13%, Shut Down Point (SDP) 23.05%, Internal Rate Return (IRR) 35.6%. From the analysis data above, it can be concluded that this factory is worthy of being established in Indonesia. Abstrak Permintaan akan arang aktif di Indonesia meningkat seiring dengan kemajuan teknologi dan industri di negara ini. Kebutuhan yang semakin meningkat ini harus didukung oleh para peneliti dan pengusaha yang bekerja di bidang arang aktif untuk memproduksi arang aktif yang baik dari segi kualitas dan kuantitas. Untuk memenuhi permintaan domestik, pabrik arang aktif ini didirikan. Tujuan dari penelitian ini adalah untuk menentukan kelayakan pendirian pabrik arang aktif berdasarkan analisa ekonomi. Kapasitas produksi dalam pendirian pabrik direncanakan 9.000 ton / tahun. Pabrik ini beroperasi selama 300 hari setahun. Pabrik arang aktif direncanakan akan dibangun di Kabupaten Malang, Provinsi Jawa Timur pada tahun 2026. Alat utama yang digunakan dalam membangun pabrik arang aktif dari biji salak adalah Mixer. Proses utilitas antara lain pasokan air proses, listrik, air pendingin dan bahan bakar. Return On Investment (ROI) sebelum pajak 87% dan setelah pajak 79%. Pay Out Time (POT) 1,2 tahun, Break Event Point (BEP) 39,13%, Shut Down Point (SDP) 23.05%, Internal Rate Return (IRR) 35,6%. Dari data analisis di atas dapat disimpulkan bahwa pabrik ini layak didirikan di Indonesia.

Fortifikasi Food Bars Berbahan Baku K3 (Kacang Koro, Daun Kelor dan Daun Kale) Sebagai Asupan Nutrisi Pencegah Stunting pada Ibu Hamil Ngongo, Doransi; Wirawan, Wirawan; Rahmawati, Atina
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 6 (2023): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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This study aims to produce Food Bars as a food product to meet the nutritional needs of pregnant women, especially one of the efforts to prevent stunting in fetuses that are still in the womb. There are 4 important nutrients needed to prevent this disease, namely protein, iron, carbohydrates and calcium. Showed that the best treatment was with a composition of 80% jack bean flour: 10% Kale leaf flour and 10% Moringa leaf flour with the resulting chemical composition of calcium levels of 5.65 mg/100 grams, iron (Fe) levels of 0.88 mg. /100 grams, protein content 22.51%, carbohydrate content 42.62%, water content 22%, ash content 3.56% and physical analysis of breaking strength 29.04 N. ANOVA test showed a significant effect on protein and carbohydrate content but had no significant on water content, calcium content, iron (Fe), ash content and fracture strength. Abstrak Produk Food Bars merupakan produk makanan untuk memenuhi kebutuhan gizi ibu hamil terutama upaya salah satu mencegah stunting pada janin yang masih dalam kandungan. Terdapat 4 nutrisi penting yang dibutuhkan untuk mencegah penyakit ini, yaitu protein, zat besi, Karbohidrat dan kalsium. Hasil penelitian didapatkan perlakuan terbaik yaitu dengan komposisi tepung kacang koro 80% : Tepung Kale 10% dan Tepung daun kelor 10% dengan hasil komposisi kimia kadar kalsium dengan kadnuangan 5,65 mg/100 gram, kadar Zat besi (Fe) 0,88 mg/100 gram, kadar protein 22,51%, Kadar karbohidrat42,62%, kadar air 22%, kadar abu 3,56% serta analisa fisik daya patah 29,04 N. Hasil penelitian uji sidak ragam ANOVA menunjukkan pelakuan pengaruh nyata untuk kadar karbohidrat dan kadar protein tetapi perlakuan tidak berpengaruh pada kadar air, kadar kalsium, zat besi (Fe), kadar abu dan daya patah.

Perencanaan Saluran Irigasi Sub Daerah Irigasi Onggok Atas Pada Daerah Irigasi Banjarcahyana, Kabupaten Banjarnegara, Jawa Tengah Koten, Agustinus Doro Ruro; Kiki Frida , Sulistyani; Suhudi, Suhudi
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 6 (2023): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Agricultural land always needs water to maintain its fertility. Water is a source of nutrients and nutrients that act as fertilizers for land and agricultural crops. At this time the land area of the Onggok Atas sub-irrigation area, Banjarcahyana Irrigation Area has not been able to obtain irrigation water evenly in the sense of sufficient quantity and the right time. This is due to, among other things, the condition of the irrigation network has decreased its capacity. This study aims to determine the need for irrigation water in rice fields, to determine the need for water in the channel and to determine the dimensions of the Onggok Atas secondary channel. Researchers conducted a review of secondary channels by collecting secondary data for the calculation of hydrological analysis, irrigation water needs using KP 01 and 03 guidebooks and later obtained the cross-sectional size of secondary irrigation channels. Based on the results of the analysis that has been calculated on an area of 316.10ha and the length of the secondary channel is 4881m, the irrigation water requirement in rice fields is 1.11lt/dt/ha for rice and 0.89lt/dt/ha for secondary crops. The water requirement upstream is 488.25lt/dt = 0.488m3/dt and the water requirement downstream is 100.67lt/dt = 0.101m3/dt. The dimensions of the largest irrigation secondary channel are B.OA 1, Stream Cross Section, (A) = 0.919m2 with width (b) = 0.95m and height (H) = 0.79m, and the dimensions of the smallest irrigation secondary channel are B.OA 6, Stream Cross Section, (A) = 0.171m2 with width (b) = 0.45m and height (H) = 0.45m.

Formulasi Crude Palm Oil dan Palm Kernel Oil Terhadap Kualitas Sabun Mandi Padat Rani; Sikmenes, Alfadina Omega; Fajarwati, Yuni Eka; Widyastuti, Fikka Kartika
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 6 (2023): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Crude Palm Oil (CPO) has quite large potential for the cosmetic and pharmaceutical industries. CPO contains carotenoids, tocopherols and tocotrienols which function as natural antioxidants. Soap containing carotenoids is good for the skin. Palm Kernel Oil (PKO) is a substitute for goat's milk, where goat's milk and PKO both have natural antibacterial properties. To obtain good bath soap, research was carried out on solid bath soap from CPO and PKO. The research method is an experimental method with the main reaction, namely saponification. The saponification reaction is a reaction to form soap, which is usually made from fats and bases. To determine the CPO and PKO formulations on the characteristics of solid bath soap with NaOH concentrations of 20%, 25%, 30% respectively, with a stirring time of 30 minutes and a stirring temperature of 70oC. Next, tests were carried out with several parameters, namely analysis of water content, pH, foam power, emulsion and free alkali. After analyzing and comparing soap with the main ingredients of crude palm oil and palm kernel oil, soap with a NaOH concentration of 25% is suitable for use because it meets SNI with a water content value of 11.34%, pH 10.5, free alkali 0.1%, foam height 12 .5 cm, and foam power of 90.4%. Abstrak Crude Palm Oil (CPO) atau minyak sawit mentah mempunyai potensi relatif besar untuk industri kosmetik dan farmasi. CPO mengandung karotenoid, tokoferol, dan tokotrienol yang berperan sebagai antioksidan alami. Palm Kernel Oil (PKO) merupakan sebagai pengganti susu kambing, diaman susu kambing dan PKO sama- sama memiliki sifat antibakteri alami. Untuk memperoleh sabun mandi yang baik maka dilakukan penelitian sabun mandi padat dari CPO dan PKO. Metode penelitian adalah metode eksperimen dengan reaksi utama yaitu saponifikasi atau reaksi pembentukan sabun. Untuk mengetahui formulasi CPO dan PKO terhadap karakteristik sabun mandi padat dengan konsentrasi NaOH masing- masing 20%, 25%, 30%, dengan waktu pengadukan 30 menit serta suhu pengadukan 70oC. Selanjutnya dilakukan pengujian dengan beberapa parameter yaitu analisa kadar air, pH, daya busa, emulsi, dan alkali bebas. Setelah dilakukan dianalisa dan perbandingan sabun dengan bahan utama crude palm oil dan palm kernel oil, sabun dengan konsentrasi NaOH 25% layak digunakan karena memenuhi SNI dengan nilai kadar air 11,34%, pH 10.5, alkali bebas 0,1%, tinggi busa 12,5 cm, serta daya busa 90,4%.

Analisa Kinerja Simpang Tiga Tak Bersinyal (Studi Kasus Jalan Raya Sekarpuro - Jalan Raya Ki Ageng Gribig - Jalan Wisnuwardhana Kecamatan Pakis, Kabupaten Malang) Yolan , Yohanes; Arifianto , Andy Kristafi; Rahma , Pamela Dinar
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 6 (2023): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Defined there are several problems that often occur and that are the cause of traffic congestion at the intersection of three unsignalized Jalan Raya Sekarpuro - Jalan Raya Ki Ageng Gribig - Jalan Wisnuwadhana Pakis District, Malang Regency The congestion that occurs is caused by long lines of vehicles due to the presence of large vehicles passing through the intersection of three unsignalized Jalan Raya Sekarpuro - Jalan Raya Ki Ageng Gribig - Jalan Wisnuwadhana. The large flow of vehicles passing through the unsignalized triple intersection of Jalan Raya Sekarpuro - Jalan Raya Ki Ageng Gribig - Jalan Wisnuwadhana where the width of the road is not balanced with the traffic flow. The number of activities on the shoulder of the road such as parking vehicles on the shoulder of the road and there are also street vendors that affect the performance at the intersection of three unsignalized Jalan Raya Sekarpuro - Jalan Raya Ki Ageng Gribig - Jalan Wisnuwadhana. From the results of the analysis of existing conditions at the intersection, it is known that the value of vehicle volume in the first week is 11449,5 skr / hour. The performance of the intersection can be seen from the results of data processing using the Indonesian road capacity guidelines PKJI 2014 at the intersection of three unsignalized the highest degree of saturation (DJ) value is in the first week of Monday morning peak hour is 1.0> 0.85, then it is included in the level of service criteria F, namely the state of the flow persists or there is a long queue of vehicles with low capacity, the volume is below capacity and forms a series of vehicles, congestion often occurs and the time is long enough. In extreme circumstances speed and volume can drop to zero.

Analisis Pengendalian Biaya dan Waktu Pekerjaan Struktur dengan Metode Earned Value (Studi Kasus: Asrama Seminari Montfort Kota Malang) Atarima , Climensia; Yurnalisdel, Yurnalisdel; Wijaya, Handika Setya
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 6 (2023): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Planning and controlling costs and time on a project is part of construction project management which is very important. If there are project delays or costs that exceed the plan cost, it will affect the implementation of the work. This research case study was selected for the Montfort Seminary Dormitory Structure Construction Project in Malang City. Researchers only analyzed structural work with a duration of 188 calendar days. The researcher's goal is to find out the projected cost and time of completion of the project against the initial planning. The method used is Earned Value Concept using BCWS, BCWP, ACWP indicators. To see the projection of work in this study using Cost Variance with CV and CPI indicators, for Cost estimates using ETC and EAC. As for Time Variance, using SV and SPI indicators and time estimates using EAC and EAS. The projected total cost of completing the project is IDR 2,203,741,880. After the project bidding, the cost amounted to Rp1,844,162,647, and after the implementation, the actual cost or expenditure cost amounted to Rp. 1,809,802,748. With the remaining funds amounting to IDR 34,359,898. The results of the calculation of CPI (Cost Performance Index) until week 27 => 1. The results of the SPI (Schedule Performance Index) calculation up to week 27 =>1 Good and Efficient Cost Performance and Good Schedule Performance with the Schedule according to the Plan and no delays in project construction work.

Perhitungan Biaya Kontruksi Saluran Bermaterial Pasangan Batu Pada Kegiatan Perencanaan Saluran Drainase Jalan di Simpang Seputuk STA 4+400 – 8+600 Robert, Angelinus; Sulistyani, Kiki Frida; Suhudi, Suhudi
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 6 (2023): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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An environmentally sound drainage system as a system that is able to keep a facility, especially roads, dry, and can handle problems such as flooding and puddles on the surface, Jalan Simpang Seputuk is an active crossing that is used but there are several obstacles on the left and right side of the road, namely there are puddles of water when it rains, therefore the use of drainage functions is very important. This research uses a quantitative approach method and with secondary data analysis. The study location is topographically in a low and flat position near the Sesayap river which is the downstream of 2 watersheds namely the Seputuk river and the Rian river, the cost budget plan for excavation of soil, soil backfill and left channel stone masonry starts from STA 4+400 - 8+600 Rp2,067,403,777.00. The budget plan for excavation, backfill and right channel pairs starting from STA 4+400 - 8+600 IDR 1,807,281,377.00. With the results of the total cost of planning the drainage channel STA 4 + 400 - 8 + 600 right and left channels IDR 3,874,685,154.00.

Analisa Uji Biodegradasi Bioplastik dari Pati Kulit Singkong dengan Variasi Volume Gliserol, Selulosa Jerami Padi dan Kitosan Nurhidayah, Putri; Fajarwati, Yuni Eka; Fitri, Ayu Chandra Kartika
Prosiding SENTIKUIN (Seminar Nasional Teknologi Industri, Lingkungan dan Infrastruktur) Vol 6 (2023): PROSIDING SENTIKUIN
Publisher : Fakultas Teknik Universitas Tribhuwana Tunggadewi

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Biodegradable plastic or bioplastic is a type of plastic that is environmentally friendly because it decomposes into water and carbon dioxide through bioplastic components. The raw materials for bioplastics come from natural sources that can be recycled and biodegrade, such as cassava peel starch and cellulose. The aim of this research is to determine the quality of bioplastics made from cassava peel starch, rice straw cellulose, and chitosan with varying amounts of glycerol using biodegradation analysis tests. This research focuses on biodegradable plastic using different amounts of glycerol, namely 4 ml, 6 ml, and 8 ml. The best results for bioplastics made from cassava peel starch were found at a content of 38.03%, this was achieved in the 8 ml glycerol variant, for a mixture of starch and cellulose, the best results were obtained in the 6 ml glycerol variant with a content of 61.93%, and for a mixture of starch, cellulose , and the best chitosan results were obtained in the 4 ml glycerol variant with a content of 57.14%. Abstrak Plastik biodegradable atau bioplastik merupakan jenis plastik yang ramah lingkungan karena terurai menjadi air dan karbon dioksida melalui komponen bioplastik, bahan baku bioplastik berasal dari sumber alam yang dapat didaur ulang dan terurai secara biologis, seperti pati kulit singkong dan selulosa. Tujuan penelitian ini adalah untuk mengetahui kualitas bioplastik berbahan dasar pati kulit singkong, selulosa jerami padi, dan kitosan dengan jumlah gliserol yang bervariasi menggunakan uji analisis biodegradasi. Penelitian ini berfokus pada plastik biodegradasi dengan menggunakan jumlah gliserol yang berbeda yaitu 4 ml, 6 ml, dan 8 ml. Hasil terbaik untuk bioplastik berbahan dasar pati kulit singkong terdapat pada kandungan 38,03% hal ini dicapai pada varian gliserol 8 ml, Untuk campuran pati dan selulosa, hasil terbaik diperoleh pada varian gliserol 6 ml dengan kandungan 61.93%, dan untuk campuran pati, selulosa, dan kitosan hasil terbaik diperoleh pada varian gliserol 4 ml dengan kandungan 57,14%.

Home Page

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Editorial Team

Contact

Reviewer

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Contact Name
Ayu Chandra

Contact Email
ayu.chandra21@gmail.com

Phone
+6285797094724

Journal Mail Official
sentikuin@unitri.ac.id

Editorial Address
Fakultas Teknik, Universitas Tribhuwana Tunggadewi Malang Jl. Telaga Warna Blok C, Tlogomas, Malang 65144, Jawa Timur

Location
Kota malang,

Jawa timur

INDONESIA

Abstract

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Home Page

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

Contact Name Ayu Chandra

Contact Email ayu.chandra21@gmail.com

Phone +6285797094724

Journal Mail Official sentikuin@unitri.ac.id

Editorial Address Fakultas Teknik, Universitas Tribhuwana Tunggadewi Malang Jl. Telaga Warna Blok C, Tlogomas, Malang 65144, Jawa Timur

Location Kota malang, Jawa timur INDONESIA

Abstract

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Contact Name
Ayu Chandra

Contact Email
ayu.chandra21@gmail.com

Phone
+6285797094724

Journal Mail Official
sentikuin@unitri.ac.id

Editorial Address
Fakultas Teknik, Universitas Tribhuwana Tunggadewi Malang Jl. Telaga Warna Blok C, Tlogomas, Malang 65144, Jawa Timur

Location
Kota malang,

Jawa timur

INDONESIA