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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Articles 3,145 Documents
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Klasifikasi Dan Estimasi Lokasi Gangguan Pada Saluran Transmisi Tenaga Listrik 150 Kv Menggunakan Metode Hibrid Sandy Ahmad; Azriyenni Azhari Zakri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This research proposes a hybrid method for classifying and estimating the location of short circuit faults in the electrical power transmission line. The hybrid method used Discrete Wavelet Transform (DWT) and Adaptive Neuro Fuzzy Inference System (ANFIS). The transmission system of bus Koto Panjang (KP) to bus Garuda Sakti (GS) in Riau province with a length of 64km were used in this research. DWT was utilized to process information from each phase voltage and current transient signals as well as the zero sequence current for one cycle after the fault begins. The ANFIS classification was designed to detect any fault in each phase and ground in determining the type of short circuit fault. ANFIS estimation was used to measure the fault location that occurs in the transmission line. The training and testing data were generated by simulating type of short circuit fault in Matlab/Simulink with variations in the fault location and fault resistance. The results obtained are classification of fault with an accuracy of 100% and the estimation of fault location with the lowest error is 0.000605% and the highest error is 0.029827%. Keywords: ANFIS, DWT, fault classification, fault estimation, short circuit.
Eksperimental Penambahan Graphene Sebagai Zat Aditif Pada Campuran Asphalt Concrete Binder Course (AC-BC) Novia, Ali; Shalahuddin, Muhammad; Alwinda, Yosi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The type of pavement commonly used in Indonesia is flexible pavement that uses asphalt as its binding material. It is very important to maintain the characteristic of asphalt that functions as the aggregate adhesive in a mixture of asphalt concrete (laston). One way of maintaining or improving the characteristics of the laston is by using graphene as an additive. This study was aimed to examine and analyze the effect of adding graphene as an additive and to find out the most effective level of graphene addition in the asphalt mixture to the Marshall characteristics of the AC–BC laston mixture. This study combined the addition of graphene as an additive of 3.5%, 4%, and 4.5% of the weight of asphalt. The test results showed that the stability value of Marshall characteristics at optimum bitumen content conditions is increased. The highest stability value is found in the addition of 4.5% of graphene which is 1500 kg. The most effective level of graphene addition in the asphalt mixture against Marshall characteristics is by adding 4.5% graphene. The addition of 4.5% of graphene has the highest stability value with a difference of 200 kg or 14.81%, while the value of flow is 4,5 mm, VIM is 3.7%, VFA is 76%, VMA is 14,8%, and MQ is 350 kg/mm, all these values fulfill Bina Marga specifications 2010 revision 3, except the flow values. Keywords: Graphene, Marshall characteristics, AC–BC, Laston
Analisis Studi Eksperimental Sifat Mekanik Bata Ringan (Cellular Lightweight Concrete) Akibat Pembebanan Displacement Control Efendi, M. Rizal Dika; Suryanita, Reni; Maizir, Harnedi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Light brick is a brick that has a specific gravity ranging between 600 to 1600 kg/m3. Light brick has the main raw material consisting of sand, cement, water, coupled with a foaming agent material. The aim of the study was to obtain the composition of the optimum light brick mixture which resulted in maximum compressive strength. The compressive strength of the lightweight concrete was measured by applying compression displacement-controlled loading system. The mixture of each composition for the lightweight concrete used in this study was compliance with Ministry of Public Works module for lightweight mortar technology heap foam material for road construction. Light brick composition was varied based on the percentage of foaming agent and sand. The optimum composition has 25 kg cement, water as much as 13 kg, sikament NN 200 ml, sand as much as 64 kg and foaming agent as 5.7 kg of 12 samples of the test specimen. The compressive strength of optimum composition at the age of 3, 7, 14 and 28 days was 0.264 MPa, 0.364 MPa, 0.511 MPa, and 0.648 MPa, respectively. Based on test results, it was concluded that the addition of the foaming agent and sand would increase the compressive strength of the light brick. Keywords: Brick Lightweight CLC, Compressive Strength, Displacement Control Method, Optimal composition.
Preparasi Katalis CaO/Fly Ash Dan Penggunaannya Pada Reaksi Transesterifikasi Minyak Sawit Off Grade Untuk Produksi Biodiesel Anggraini, Diva Putri; Helwani, Zuchra; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Calcium oxide preparation of solid base catalyst through calcination, hydration, dehydration methods with fly ash to load calcium oxide through impregnation method. Effect of dehydration temperature and time on the catalytic performance were studied. The catalyst with the highest activity is obtained when the dehydration temperature of 600 °C and the dehydration time of 3 hours with transesterification reaction conditions of a molar ratio of methanol/oil 6:1, catalyst dosage of 6% by weight, temperature of 70 °C for 2 hours with yield biodiesel results reached 84,32%. CaO, SiO, Ca2SiO4 and Ca(OH)2 materials was found in the catalyst through x-ray diffraction (XRD) analysis with a catalyst alkalinity values of H_ > 9.3 through alkalinity analysis using hammet indicator phenolphthalein and specific surface area of catalyst is 8,31 m2/g through Brunauer-Emmett-Teller (BET) analysis. Some methyl ester such as methyl palmitate and methyl oleate was found in the biodiesel through Gas Chromatography-Mass Spectrometry (GC-MS) analysis.Keywords: biodiesel, calcination, dehydration, hydration, transesterification
Pengaruh Pemberian Limbah Cair Tahu Dan Fotoperiod Terhadap Kadar Glukosa Pada Kultivasi Mikroalga Scenedesmus sp. Dian Larasati; Shinta Elystia; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

More energy needs are met from fossil energy, but that fuel can’t be renewed. Various studies have been conducted to utilize microalgae as raw material for biofuels. The carbohydrate content in microalgae can be used as raw material for bioethanol. Scenedesmus sp. considered a promising microalgae for biofuel production because it has a high level of growth and glucose production, and can utilize organic matter as a nutrient in the form of tofu liquid waste so that the synergy between wastewater treatment and biomass production can run well. The purpose of this study was to determine the optimal conditions for growth of Scenedesmus sp. with the influence of photoperiod and volume of tofu wastewater on glucose levels formed after the cultivation process. In this study variations in the provision of tofu wastewater in the cultivation medium (0%, 20%, 40%, 60%, 80%, 100%) with the ratio of photoperiod light:dark (16:8, 14:10, 12:12, and 24:0) and the time of data collection on days are 0, 1, 3, 5, 7, 9, 11, and 13. Based on the results of the study obtained the highest glucose level of 36,41 mg/l at the added of 20% tofu liquid waste and photoperiod 12:12. Keywords: Glucose, tofu liquid waste, photoperiod, Scenedesmus sp.
Pengaruh Proses Pengomposan TKS Sisa Media Pertumbuhan Jamur Coprinus Comatus Terhadap Penurunan Rasio C/N Sisri Wantri Sanjaya Manalu; Elvi Yenie; David Andrio
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Empty fruit bunch (EFB) is a solid waste from palm oil industry which is 23% per ton fresh fruit bunch (FFB). Utilization of EFB is not optimal and it can be negative effect to environmental because of lignin content which hard to degradation. The best solution is utilization EFB so it can increase the positif value by doing composting This research aim to learn effect of anaerobic sludge from POME treatment toward C/N ratio In composting process there are 2 variations of addition wich are directly (S0 with 0.5 kg EFB spent mushroom) adding L1 about 1 kg, L2 about 2 kg, L3 about 3 kg, and L4 about 4 kg, and adding inderectly or in stage (S0 with 0.5 kg EFB spent mushroom) adding B1 about 2.5 kg, B2 about 0.5 kg, B3 about 0.75 kg and B4 about 1 kg. The result of lignin content in day 25 of pretreatment phase is 10.43% and the best result reach by composting with addition directly and addition indirectly  are adding 4 kg (L4) about 10.31% and adding with 1 kg (B4) about 14.14 and composting process stop in day 5. The conclusion in this research are pretratment by growing Coprinus comatus mushroom will help in degradation process and make the composting period be brief. Keywords : EFB, Composting, Anaerobic Suldge, C/N Ratio
Fasilitas Pelatihan Seni Pertunjukan Di Tepi Sungai Siak Pekanbaru Dengan Pendekatan Arsitektur Waterfront Mohd. Aidil Akbar; Pedia Aldy; Mira Dharma S
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Art is an integral part of the human history that is inseparable from the development of human civilization. Performing art is the identity of a nation as one of the cultural wealth. Pekanbaru city with multiple layers of society, have a numerous arts and cultures need cultural spaces that are able to accomodate a wide range of performing arts. Siak River flows through and splitting the city, it have historical values and local wisdoms that can be utilized to create a cultural district on the river. Siak River as an icon of Pekanbaru in ancient times can regrow the cultural values that have started are lost among the public. The Siak Riverside can potentially be used as a cultural tourist destinations, it can take advantages of the natural resources that exist in the surroundings. Performing Art Training Facilities that have educative functions will be supported by aspects of the malay culture and local wisdom, these facilities will accomodate training and performing medium for artists and recreational for visitors. The design methods used include field data collection, studies and empirical studies library. The result of this design is the performing art facilities with the concept of a “Culture Wave” adopt shape and meaning implementation on the principle of the waterfront architecture. Wave visualization applied to the site design through a patterned waves canal-dividing the site into three parts, and the wave shape of the roof, while the image of the building adopt the typical of the malay culture and Pekanbaru local wisdom.Keywords: Performing art, Wave, Culture, Waterfront Architecture
Pengaruh Perbandingan Kitosan Dan Selulosa Dari Serat Daun Nanas (Ananas comosus) Terhadap Pembuatan Bioplastik Ani, Tengku Urai; Amri, Idral; Zultiniar, Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Pineapple leaf waste can be utilized as a raw material for synthesis of bioplastic. the objective from this research was to determine effect of comparison of chitosan and cellulose from pineapple leaf fiber in synthesis of bioplastic and also to determine the good composition of comparison who based on mechanical properties of bioplastic. This research began by extracting cellulose from pineapple leaf fiber in three stages. The first stage was alkaline treatment (delignification), pineapple leaf fiber were cut in size ± 5 mm. Then 400 ml of 1M NaOH was added in 40 grams of fiber and heated at 80°C for 4 hours then washed and filtered. The second stage was bleaching, result of delignification process was dissolved in 5% NaOCl for 3 hours at 30°C then filtered. The third stage of acid treatment, the results of bleaching added 3% HCl and heated at 60°C for 1 hour then filtered and dried so that cellulose was obtained. Furthermore, synthesis of bioplastics was made by mixing PVA 10%, cellulose 1 gram and chitosan with comparison of chitosan: cellulose was 4:10; 5:10; 6:10. Then bioplastic mixture heated and stirred at 70°C for 20 minutes then printed on the glass mold. Repeat the synthesis for cellulose 2 gram. The good composition results in this study were chitosan with a ratio of 5:10, cellulose 2 grams and PVA 10%. Where the results of the tensile strength, elongation, biodegradation and water uptake produced were 15.36 MPa, 10%, 28.44% for 2 weeks and 82.17% respectively. The results of the analysis of Scanning Electron Microscopy (SEM) bioplastics showed that the surface of the bioplastic looks homogeneous and by using the ImageJ application the average of cellulose particle size was 0.246 µm. Keywords: bioplastic, cellulose, chitosan, pineapple leaf fiber, pineapple leaf waste.
Analisa Indeks Keandalan Jaringan Tegangan Menengah 20KV Di Penyedia Kelistrikan Dengan Metode Failure Modes and Effect Analysis (FMEA) Septiyandi Kurniawan; Noveri Lysbetti Marpaung
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Nowadays the realibility level of a distribution system is essential thing to use to ensure the continuity of power supply to the consumer. That, realized that the importance of the distribution system that is able to be achieved by Failure Modes And Effects Analysis (FMEA). This research is made a reliability evolution os distribution network 20KV for a provider.it has purpose to increase the system reliability of distribution network uses the index of SAIDI , SAIFI and CAIDI in providing electricity in Padang Area, The results of the calculation which have been got is going to be compared with PLN Standard. The result of SAIFI and SAIDI in Marapalam feeder has fulfilled PLN standard cause only produce small interference. Finally, the SAIFI Value and SAIDI Value are still standard Value and reliable categories Marapalam Feeder. Keywords:CAIDI, FMEA, Reliability index,SAIFI, SAIDI.
Alternatif Bahan Baku Bioetanol Dari Mikroalga Chlorella Pyrenoidosa Yang Dikultivasi Dengan Variasi Intensitas Cahaya Dan Konsentrasi Palm Oil Mill Effluent (POME) Yuliyana Rahmawati; Shinta Elystia; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Develpoment of a dynamic world energy consumption within the limitation of fossil energy reserve as well as the awareness on the environmental conservation evoke the increase of interest on a renewable energy. Chlorella pyrenoidosa is commonly recognized as in interesting species for bioethanol production due to its the carbohydrate content. Palm Oil Mill Effluent (POME) is a potential medium for microalgae to growth because it contains high nutrient sources. This research aimed to study the effect of POME concentration and light intensity to carbohydrate produced of microalgae C. pyrenoidosa. Microalgae cultivated in POME : Medium Dahril Solution (0:100; 25:75; 50:50; 75:25; 100:0) with light intensity (3000, 4000 and 5000 lux). The result showed the highest carbohydrate concentration was 289,69 mg/L at cultivation condition of POME : Medium Dahril Solution 50:50 with the light intensity 3000 lux.Keywords: Chlorella pyrenoidosa, Palm Oil Mill Effluent (POME), Dahril Solution Medium, Carbohydrates

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