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All Journal ASEAN Journal of Systems Engineering Jurnal Rekayasa Proses Reaktor Jurnal Bahan Alam Terbarukan Bulletin of Chemical Reaction Engineering & Catalysis Seminar Nasional Teknik Kimia Kejuangan ROTOR: JURNAL ILMIAH TEKNIK MESIN Konversi Jurnal Penelitian Karet Jurnal Rekayasa Proses Jurnal Teknologi Jurnal Inovasi Teknik Kimia Jurnal Teknik Kimia Indonesia Envirotek : Jurnal Ilmiah Teknik Lingkungan Prosiding Simposium Nasional Rekayasa Aplikasi Perancangan dan Industri Bulletin of Chemical Reaction Engineering & Catalysis Jurnal Rekayasa Proses Journal of Engineering and Technological Sciences

Muslikhin Hidayat

Departemen Teknik Kimia, Fakultas Teknik, Universitas Gadjah Mada

Author-ID : 3130400

Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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STUDI KINETIKA SIKLISASI KARET ALAM DENGAN KATALISATOR ASAM SULFAT Prastanto, Henry; Rochmadi, Rochmadi; Hidayat, Muslikhin
Jurnal Penelitian Karet JPK : Volume 29, Nomor 1, Tahun 2011
Publisher : Pusat Penelitian Karet - PT. Riset Perkebunan Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22302/ppk.jpk.v29i1.112

Karet alam siklis (CNR) adalah resin pengeras dan pengkaku karet yang dapat dibuat dari lateks karet alam dengan katalis asam. CNR berpotensi menggantikan High Styrene Resin (HSR) yang merupakan produk turunan minyak bumi sehingga penggunaan CNR akan meningkatkan nilai tambah karet alam. Penelitian siklisasi lateks karet alam dengan katalis asam sulfat ini dilakukan untuk mengetahui kinetika reaksi siklisasi lateks karet alam dan nilai konstanta kecepatan reaksi siklisasi (k). Penelitian dilaksanakan di Laboratorium Teknologi Polimer, Jurusan Teknik Kimia Universitas Gadjah Mada. Lateks karet alam dicampur dengan surfaktan dan asam sulfat. Rasio massa asam sulfat terhadap massa lateks pekat karet alam (60%) adalah 1,1; 1,2; 1,3 dan 1,4, sedangkan suhu operasi yang digunakan adalah 85 dan 950C. Sampel diambil dengan interval waktu 15 menit dengan waktu reaksi sampai 2 jam. Selanjutnya sampel digumpalkan, dicuci, disaring dan dikeringkan. Sampel kemudian dianalisis konsentrasi ikatan rangkapnya yang ditunjukkan dengan bilangan iodnya. Analisis bilangan iodnya dilakukan dengan menggunakan metode larutan Wijs. Hasil penelitian ini menunjukkan, rasio massa asam sulfat terhadap lateks pekat agar dapat menghasilkan CNR adalah minimal 1,2:1. Konstanta kecepatan reaksi protonasi (k1) akan semakin besar dengan kenaikan rasio massa asam sulfat terhadap massa lateks. Nilai k2 dan k4 ternyata juga semakin besar dengan kenaikan rasio sehingga selain sebagai reaktan H+ juga berfungsi sebagai katalis.Â Â How to Cite : Prastanto, H., Rochmadi, R., & Hidayat, M. (2011). Studi kinetika siklisasi karet alam dengan katalisator asam sulfat. Jurnal Penelitian Karet, 29(1), 63-75. Retrieved from http://ejournal.puslitkaret.co.id/index.php/jpk/article/view/112

KINERJA ENZIM GANDA PADA PRETREATMENT MIKROALGA UNTUK PRODUKSI BIOETANOL Padil, Padil; Syamsiah, Siti; Hidayat, Muslikhin; Kasiamdari, Rina Sri
Jurnal Bahan Alam Terbarukan Vol 5, No 2 (2016): December 2016 [Nationally Accredited]
Publisher : Semarang State University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v5i2.7564

The use of biomass of microalgae as a feedstock to produce bioethanol is very promising, it is caused by a large amount of carbohydrates contained in microalgae physiology cell. The main obstacle of enzymatic hydrolysis in order to produce bioethanol is the bound starch granules in a rigid cell wall. Therefore, pre-treatment steps needed to remove and convert complex carbohydrates into simple sugars before the fermentation process. Tetraselmis Chuii microalgae species are green microalgae (Chlorophyta) in which the cell wall containing cellulose and hemicellulose as the main constituent, therefore, this study observe the effect of the use of cellulase enzymes and xylanase as a strategy to open up the cell walls of microalgae. Another investigated parameter is the enzyme concentration, temperature, pH, and methods of use of enzymes. The results showed that the highest yield of glucose obtained was 31.912% (w / w) and is achieved under the conditions of a temperature of 45oC, pH of 4.5, the amount of biomass of microalgae as 5 g/L, the concentration of cellulase enzymes and xilanase 30% (w / w) at 40 minute at mechanism using cellulase and xylanase enzymes simultaneously.

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jbat.v5i2.7564

Pengaruh perbandingan berat padatan dan waktu reaksi terhadap gula pereduksi terbentuk pada hidrolisis bonggol pisang Sri Rahayu Gusmarwani; M Sri Prasetyo Budi; Wahyudi Budi Sediawan; Muslikhin Hidayat
Jurnal Teknik Kimia Indonesia Vol 9, No 3 (2010)
Publisher : ASOSIASI PENDIDIKAN TINGGI TEKNIK KIMIA INDONESIA (APTEKIM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jtki.2010.9.3.1

One of the promising biofuel is bioethanol which can be produced from agricultural waste cellulosic biomass such as banana plant waste. Production of banana rhizome waste in Indonesia is about 107.5 Mton annually. Banana rhizome contains 58.89% cellulose material that can be processed to produce bioethanol through biological and chemical processes. Sulfuric acid can be used in hydrolysis of cellulose material in banana plant waste to produce sugars, and Saccharomyces cereviseae can be used to convert sugars into bioethanol. This paper presents the result of studies on effects of solid ratio and time in hydrolysis of banana plant waste to produce sugars at 120 oC. One litre of water and 10 mL of sulfuric acid was mixed with various weight of banana plant waste then heated in an autoclave. The liquid samples were taken at various time and its sugar contents were analyzed by Lane and Eynon Methode. The solid ratio was varied between 1:6.25, 1:5.88, 1:5.55, 1:5.25, 1:5, 1:4.75, 1:4.54, and 1:4.375 and the time was varied between 0 minute and 90 minutse with 10 minutes interval. The highest yield of glucose of 13.08 g/100 mL was achieved in 80 minutes and 1:5 of solid ratio.Keywords: Bioethanol, banana rhizome, hydrolysisAbstrakBioetanol adalah salah satu bentuk energi terbarukan yang menjanjikan. Sumber energi bioetanol dapat berasal dari limbah pertanian yang jarang dimanfaatkan seperti bonggol pisang. Produksi bonggol pisang di Indonesia mencapai 107,5 Mton per tahun. Selulosa yang terkandung dalam bonggol pisang mencapai 58,89% dapat diubah menjadi etanol melalui proses biologi dan kimia (biokimia). Untuk mengubah selulosa menjadi glukosa (gula) diperlukan proses hidrolisis dengan bantuan asam, misalnya asam sulfat (H2SO4), sedangkan untuk mengubah gula menjadi bioetanol dipergunakan ragi Saccharomyces cereviseae. Dalam makalah ini disampaikan pengaruh perbandingan berat padatan dan waktu hidrolisis terhadap glukosa yang terambil pada reaksi hidrolisis untuk mengubah selulosa pada bonggol pisang menjadi glukosa yang dilakukan pada suhu 120oC. Satu liter aquades dan 10 mL larutan asam sulfat pekat ditambahkan pada padatan dengan perbandingan (padatan:air) yang bervariasi dari 1:6,25, 1:5,88, 1:5,55, 1:5,25, 1:5, 1:4,75, 1:4,54, dan 1:4,375. Selanjutnya campuran dipanaskan dalam autoclave sampai suhu yang diinginkan tercapai (120 oC) dan dijaga konstan. Sampel diambil sebanyak 6 mL setiap 10 menit sampai waktu 90 menit tercapai. Analisis glukosa yang terbentuk dilakukan dengan metode Lane-Eynon. Hasil glukosa yang paling baik sebesar 13,08 g/100 mL didapatkan pada suhu 1200C dalam waktu 80 menit dengan perbandingan padatan:aquadest 1:5.Kata Kunci: Bioetanol, bonggol pisang, hidrolisis

ANALYSIS OF PHOSPHATE IN LIQUID WASTE HOSPITAL Emmy Nurhayati; Muslikhin Hidayat; Sri Puji Saraswati
ASEAN Journal of Systems Engineering Vol 2, No 2 (2014): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (238.883 KB)

Liquid waste generated by various activities in the hospital environment has the potential to pollute the environment if the parameters contained in it exceeds the specified quality standards. Parameters that most often exceeded the quality standard is phosphate (PO43-). Phosphate which exceeds the limit of 2 mg/L may affect the balance of aquatic ecosystems. One way to lower phosphate levels is using the coagulation flocculation process. This study aims to uncover the root cause of high levels of phosphate and recommendations for decline it and propose to install coagulation flocculation units.Research methodology starts from search and identification of phosphate levels of various source of phosphate in the hospital environment, from sump pit Dapur (Kitchen), sump pit Poli (Polyclinic), sump pit Lucas, sump pit Biara (Monastery), sump pit Genset and sump pit Carolus. Then doing the jar test in coagulation flocculation process using coagulant that is alum and lime with rapid stirring for 60 seconds and slow stirring for 15 minutes. Jar test was used to determine the optimal dose of coagulant for alum dose range between 50-150 (mg/L) and lime between 75-125 (mg/L). Coagulation flocculation units will be built on the largest phosphate producer with sampling as much as 6 times to determine the fluctuations of phosphate. Lab test of phosphate levels were performed using the spectrophotometric of SnCl2 method.The study data include phosphate levels from source of phosphate and phosphate fluctuations in the greatest source. Based on the results the largest source from pond Elisabeth. Jar test process is done by sampling as much as a liter of waste water taken from pond Elisabeth with total discharge of 26,640 L/day. Showed that the initial Phosphate of maximum from 7,1 mg/L decreased to 1,73 mg/L (75,63%) if given the alum dose of 50 mg/L and lime 125 mg/L which generates as much as 7,049 kg of sludge per day. Phosphate of average from 4,58 mg/L decreased to 0,73 mg/L (84,06%) with alum as much as 50 mg/L and lime as much as 75 mg/L which produces sludge as much as 5,378 kg/day. Phosphate of minimum from 2,23 mg/L decreased to 0,14 mg/L (93,72%) if given the alum dose of 50 mg/L and lime 75 mg/L with sludge as much as 4,931 kg/day.

OPTIMIZATION AND TECHNO ECONOMIC STUDY OF PLASTIC WASTE BENEFICIATION WITH PRODUCTION SIMULATION APPROACH CASE STUDY AT CV. PANDU KENCANA JOMBANG, EAST JAVA Mahendra Rian Putra; Muslikhin Hidayat; Muhammad Arif Wibisono
ASEAN Journal of Systems Engineering Vol 5, No 1 (2021): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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The problem of plastic waste is getting more and more worrying day by day. Meanwhile, the industrial demand for plastics is also increasing. So we need a recycling business that can bridge this. Plastic waste in the environment can be decomposed, and the industry fulfills plastic needs at low prices. This study aims to analyze and optimize the business of recycling plastic waste into plastic ore to reduce the amount of plastic waste in the environment and obtain material benefits. The research method used is a case study in a plastic waste processing company with the collection of data needed to determine the formulation of the problem so that a mathematical model of linear equations can be formed, which then, through production simulations, will be obtained optimization. The results are then analyzed with a techno-economic study to determine the feasibility of the business.After optimization of production from simulations based on a mathematical model of linear equations, if the company wants to get maximum profit, then the company must produce PP Black A of 1022.73 kg, PP Black B of 852.27 kg, PP Gray of 625 kg. Meanwhile, PP Gray Jumbo should not be produced. Based on the techno-economic study, the feasibility analysis before optimization was obtained as ROIa=23.40%, ROIb=23.24%, POTa=2.99 years, POTb=3 years, BEP=36.07%, SDP=23.98% LANG=4.1, DCFRR=18.8 %. Then the feasibility analysis after optimization is ROIa=29.88%, ROIb=29.73%, POTa=2.5 years, POTb=2.51 years, BEP=31.03%, SDP=20.63%, LANG=4.1, DCFRR=24.85%.

PRODUCT CLUSTERING ANALYSIS ON THE MARKETPLACE USING K-MEANS APPROACH (CASE STUDY: SHOPEE) Maria Arista Ulfa; Selo Sulistyo; Muslikhin Hidayat
ASEAN Journal of Systems Engineering Vol 5, No 2 (2021): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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The business world has experienced a paradigm shift towards a more modern concept. Many business processes are carried out through the internet or commonly known as e-commerce, by utilizing a platform known as Marketplace. One of the marketplaces that are quite well-known and in great demand in Indonesia is Shopee. The high online shopping activity in the current marketplace indirectly encourages business actors to understand the online market. However, one of the obstacles that are quite often faced by sellers, especially new sellers who are starting to enter the digital realm, is the emergence of confusion in the selection of products to be sold due to a lack of information regarding the demand for what products are in demand in the market.The process of searching for information related to the demand for products of interest is carried out through clustering analysis to find out the groups of products that are of interest to those that are less attractive to the public. The data used is product data from 6 categories in the Shopee market which was taken using web scraping techniques. The clustering processes used the K-means approach by determining the number of K and the optimal center point through the calculation of Sum Square Error (SSE) by looking at the elbow graph. The final results show the optimal number of K clusters that are different in each category, namely in category women’s clothing, men’s clothing, and electronics are at K=4 then for products in the category of Muslim fashion, care & beauty and household appliances are at K=3. Based on the validation results using the Davies Bouldin Index, values were obtained in6 categories, namely 0.391, 0.438, 0.414, 0.357, 0.387, and 0.377, which means that the cluster structure and the level of information formed in each category using the K-Means method is quite good.

UTILIZATION OF OIL PALM EMPTY FRUIT BUNCHES AS MULCH IN COMMUNITY OWNED OIL PALM PLANTATIONS (CASE STUDY IN SIMARDONA VILLAGE, NORTH SUMATRA) Annisa Fitri Harahap; Muslikhin Hidayat; Suhanan Suhanan
ASEAN Journal of Systems Engineering Vol 5, No 2 (2021): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Solid Waste Oil Palm Empty Fruit Bunches have high nutrients, which significantly determine oil palm growth rate and production. Each nutrient has its role and can show specific symptoms in plants if their availability in the soil is very lacking. Dry oil palm land and the difficulty of procuring chemical fertilizers for the community that owns oil palm plantations in Simardona Village are expected to be overcome by the use of OPEFB. Utilization of Oil Palm Empty Bunches as Mulch was done manually in 4 research scenarios. Scenario 1 uses 2 kg of chemical fertilizers plus 250 kg of OPEFB, scenario 2 uses 2 kg of chemical fertilizers plus 300 kg of OPEFB, scenario 3 uses 2 kg of chemical fertilizers plus 350 kg of OPEFB, and scenario 4 uses 2 kg of chemical fertilizers plus 400 kg of OPEFB.The results obtained are that the humidity or moisture has increased from a value of 1 to 4. Therefore, it can be seen that the effect obtained from the use of more OPEFB makes the humidity higher. The calculation of the total cost of using OPOPEFB as mulch is obtained from the sum of the price of chemical fertilizers, the price of OPOPEFB, and workers' wages. The total cost after utilization of TKKS is IDR854,000.00. The total cost before using TKKS was IDR441,600,000. The difference in costs before and after the utilization of TKKS is IDR412,400.00, an increase in costs of 48%. The cost of using TKKS is higher than before using TKKS. The total harvest obtained before the use of OPEFB is 2,000 kg or IDR4,900,000. Meanwhile, after using OPEFB, the total yield obtained was 2,700 kg or IDR6,615,000. Production income increased by 26%.

FEASIBILITY ANALYSIS AND DESIGN PROJECTION OF WASTE MANAGEMENT SYSTEM IN BALIKPAPAN Ubet Khoirudin; Muslikhin Hidayat; Rochim Bakti Cahyono
ASEAN Journal of Systems Engineering Vol 5, No 2 (2021): ASEAN Journal of Systems Engineering
Publisher : Master in Systems Engineering

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Waste generation in Balikpapan from 2016 to 2020 continues to increase by 443 to 482 tons per day. One of the efforts of DLH Balikpapan is to optimize the MRF and ITF facilities, as well as to analyze how much these facilities are needed to reduce waste generation at final disposal sites (Landfill) Manggar and enhance the durability of the landfill. The approach utilized in this study employs direct observation methods, such as data collection results on the amount of waste input and output, and secondary data, such as geometric methods and all data on waste generation in Balikpapan. The calculation of the feasibility and effectiveness analysis of the MRF inorganic waste processing facility using the recovery factor approach obtained 60.3%, while the ITF organic waste processing got a result of 45.7%.With the current condition, Manggar Landfill can be used until the end of 2025, Manggar Landfill can be used until the end of 2025. By optimizing garbage processing in these two facilities, the MRF has expanded the service coverage to 3 urban villages and has a projected age of up to 2033. It will be optimized for ITF processing facilities by utilizing process biogas. The primary objective of this research is to determine how many additional processing sites are needed starting with household waste sources thus, the calculation findings show that an additional six units of MRF facilities and ten units of ITF facilities are required. As a result, with the addition of inorganic and organic waste processing sites, Manggar's Landfill estimated age is extended until 2028.

Studi Simulasi pada Unit Reformer Primer di PT Pupuk Sriwidjaya Palembang Sigit Abdurrakhman; Sutijan; Muslikhin Hidayat
Jurnal Rekayasa Proses Vol 6, No 2 (2012)
Publisher : Departemen Teknik Kimia Fakultas Teknik Universitas Gadjah Mada

Pabrik amonia merupakan salah satu pabrik yang terdapat di industri pupuk. Unit Reformer Primer merupakan salah satu alat di pabrik amonia yang merupakan tempat terjadinya reaksi katalitik antara steam dengan metana dikenal dengan proses steam methane reforming. Bahan baku utama adalah steam (H2O) dan gas alam dengan kandungan utama metana (CH4). Penelitian ini membuat model proses unit Reformer Primer untuk menghitung profil temperatur, tekanan dan komposisi untuk kondisi operasi steady state dengan berdasarkan kondisi operasi di pabrik Amonia Pusri 3 PT Pupuk Sriwidjaya Palembang. Asumsi yang digunakan adalah plug flow baik pada sisi furnace maupun pada sisi reaktor katalitik dan kondisi steady state. Untuk menyelesaikan persamaan diferensial ordiner yang digunakan pada penelitian ini dipakai metode Runge Kutta dengan program SciLab sehingga didapat profil konversi dan temperatur di Reformer Primer. Variabel yang mempengaruhi dalam reaksi di Reformer Primer adalah temperatur, tekanan, dan komposisi. Hasil simulasi jika dibandingkan dengan data operasional pabrik menunjukkan ralat rerata 3,94 %. Jika model tersebut digunakan pada berbagai kondisi operasi menghasilkan ralat rerata 7,01 %. Kata kunci: reformer primer, metana, steam, amonia Ammonia plant is the main part of fertilizer industry. Primary reformer is an unit operation where catalytic reaction between steam and methane take place, or it is known as steam methane reforming. The main raw material is steam (H2O) and natural gas with major content of methane (CH4). The objective of this research was to develop primary reformer unit process model to calculate temperature, pressure and composition profiles for steady state operation according to operating condition on Ammonia III plant in PT Pupuk Sriwidjaya Palembang. The assumption used was plug flow model both on the furnace side and on the catalytic reactor side for steady state conditions. The ordinary differential equations were solved using Runge Kutta method with Scilab software to get the conversion, pressure and temperature profiles on primary reformer. Variabels evaluated were temperature, pressure, and composition. The simulation result showed that an average error of 3.94 % compared to the operational plant data. For various operating conditions this simulation showed an average error of 7.01 %. Keyword: primary reformer, methane, steam, ammonia

Co-Authors ', Padil Akhwari Wahyu P Annisa Fitri Harahap Arief Budiman Arif Kusumawanto Aswati Mindaryani Azarya, Eblin Alle Cahyono, Rochim Bakti Danang Tri hartanto Devi Yuni Susanti Doni Agus Sumitro Eddy Kurniawan EKA SARI Emmy Nurhayati Febrina Sarlinda Fikrah Dian Indrawati Sawali Fikry Nashrullah K Hartanto, Danang Tri Harwin Saptoadi Hary Sulistyo Hary Sulistyo Henry Prastanto Henry Prastanto, Henry Iqbal Haitami Liau, Selva Susilowati M Sri Prasetyo Budi Mahendra Rian Putra Maria Arista Ulfa Megawati Megawati Meutia Ermina Toif Moh Fahrurrozi Moh. Azhar Afandy Moh. Fahrurrozi Muhammad Arif Wibisono, Muhammad Arif Muhammad Mufti Azis Muhammad Mufti Aziz Muhammad Natsir Hakiki Mustikaningrum, Mega Ningrum, Sari Sekar Nugraha, Maulana Gilar Nurhalim Nurhalim Nurkholis Nurkholis Nurkholis Nurkholis Padil, Padil Panut Mulyono Rahayu, Neni Rina Sri Kasiamdari Rochim Bakti Cahyono Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi Rochmadi S Syamsiah Sarto Sarto Sarto Sarto Sarto Sarto Selo Sulistyo, Selo Sigit Abdurrakhman Siti Syamsiah Siti Syamsiah Sri Puji Saraswati Sri Rahayu Gusmarwani, Sri Rahayu Suhanan Suhanan Sunarya, Rahmat Sutijan Sutijan Aziz Sutijan Sutijan Sutijan Sutijan Syafrima Wahyu Syamsiah, Siti Syarifhidayahtullah Syarif Ubet Khoirudin Veronika, Chintia Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wahyudi Budi Sediawan Wibowo, Claudia Shinta Octa

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