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Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
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Articles 3,145 Documents
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Pengaruh Volume Inokulum Acetobacter Aceti Dan Waktu Fermentasi Terhadap Fermentasi Asam Asetat Dari Nira Aren (Arenga Pinnata) Yasminto, Habib Maulana; Chairul, Chairul; Utami, Syelvia Putri
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

Sugar palm sap produced by sugar palm tree (Arenga pinnata). The sap is important product due to its sugar content can be used to produce brown sugar or fermented to ethanol and acetic acid. The sugar palm which is obtained from not fruit bunches with high sugar concentrations so as to provide an opportunity in the utilization of sugar palm to be acetic acid. Acetic acid can be produced naturally from ingredients containing sugar through fermentation using bacteria. The purpose of this study was to determine the result of ethanol in fermentation alcoholization, determine the effect of variations in the time of fermentation, variations in the volume of acetobacter aceti inoculum, determine the best acetic acid fermentation time for the concentration acetic acid obtained and determine the remaining ethanol and sugar during the asetification fermentation process. The bioethanol fermentation time is 6 day with volume of inoculum is 10% while the volume inoculum asetification fermentation 15% and the time of acetic acid fermentation is 16 day. The results of the analysis using the Nelson-Somogyi reagent revealed that the initial sugar concentration was 143.33 g/L. The maximum concentration of acetic acid obtained was 3.74%. This maximum concentration was obtained on 8 days of acetic acid fermentation at 15% of acetobacter aceti.Keywords : acetobacter aceti, acetic acid, fermentation, inoculum, sugar palm
EVALUASI KINERJA DAS DAN SIMULASI KONSERVASI MENGGUNAKAN SWAT (SOIL AND WATER ASSESSMENT TOOL) (StudiKasus : Sub DAS Tapung, Siak, Provinsi Riau) Mardan Fajri; Manyuk Fauzi; Ari Sandhyavitri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Alteration of land use which is happening at left Tapung watershed (DASTapungKiri) is effect to rate of flow of the watershed. Marked by the decreasing offorest area from 15.624,36 ha at 2002 to 12.186,32 ha at 2012. Evaluation ofwatershed condition and performance is needed. Evaluation using (i) Percentageof critical land (PLK) (ii) Percentage of vegetation cover (PPV) (iii) Coefficientregim of flow(KRA) (iv)Coannual of flow (KAT) efficient criteria. Evaluationresult of PLK is 9,82%, PPV 71,6%, KRA 14,28 and KAT 0,45. After receivingexisting evaluation value, conservation simulation using SWAT program is doneby changing a part of open land area and shrub on land use map of 2012 withforest. From simulation result, SWAT model validity parameter R2 is 0,50 andNSE 0,50. These result have satisfied the research objectives as the findingcoefficient were > R2 0,4 and >NSE 0,35 From this simulation, watershedcondition is evaluated again. Evaluation result after doing conservationsimulation are PLK 6,52 % PPV 73,08 % KRA 5,78, and KAT 0,44. Values afterconservation simulation gives better result than the condition before conservationsimulation is done.Keywords: altration of land use, SWAT, watershed performance.
Optimasi Kondisi Proses Pembuatan Pulp Tandan Kosong Sawit Rafi, M Khaidiz; Helwani, Zuchra; Rionaldo, Hari; Zulfansyah, Zulfansyah
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 use of wood for paper making in Indonesia can be reduced by biomass materials and non-wood raw materials. Indonesia is the country that produces the largest palm oil in the world with a total oil palm plantation area of 11 million Ha and a total palm oil production of 33 million tons / year [Ministry of Agriculture, 2016]. Reduce palm oil mill waste can be use by utilizing oil palm empty fruit bunch as alternative raw material in making paper. A central composite design (CCD) and response surface methodology (RSM) were employed to optimize the soda pulping of oil palm empty fruit bunch. The effects of three independent variables are temperature (120oC, 130oC and 140oC), cooking time (60, 120 and 180 min), solid to liquor ratio (1/8, 1/10 and 1/12) on pulp yield, lignin content, and physical properties of pulp were investigated. The major parameter influencing was the solid to liquor ratio for pulp yield and lignin content. According to the response surface analysis the optimum conditions for yiled pulp 50,66% and lignin content of 5,2% would be obtained using a cooking time of 60 minute, at 180◦C and with a solid to solid to liquor ratio of 1/12 with desirability value 0.788. On the physical characteristics of the pulp the value obtained for the burst index is 21.769 kPa m2/g, tensile index 0.570875 mN.m2/g and tear index 548.791 mN/g.Keywords: oil palm empty fruit bunch, optimization, CCD, RSM.
Pengaruhdiameter Pelathelical Terhadap Dayadukung Tekan Pondasi Tianghelical Pada Tanah Gambut Dengan Metoda Pembebananconstant Stress Of Penetration Unzi Marwan; Ferry Fatnanta; Soewignjo Agus Nugroho
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Foundation type selection is very influential on the building strength. One alternative of foundation type substitute for cerucuk is helical pile. Helical pile manufactured of steel consist of one or more helix-shaped bearing plates fixed to a central shaft that is rotated into the ground to support structure. This research presented the result of static loadingtest of helical pile on peat with constant stress penetration method. Datas of loading test in the form of load and penetration interpretation with Tangent of Intersection method and Terzaghi and Peck method. Pile variation in number and diameter of helix was conducted.Results indicate that addition of number helical will improve bearing capacity of helical pile. At pile that add with different helix's diameter, addition plate helical not affect significant to pile capacity for smaller diameter position on bottom. Comparison staticload test with empirical methods i.e method of Induvidual plate bearing and cylinder shear bearing. To sum up, cylinder shear bearing method more suite to static loading test than individual plate bearing method wiith standar error 0,79 and 1,79 respectivelly.Key words: helical pile, peat, individual plate bearing, cylinder shear
Sistem Penentuan Lokasi Gangguan Pada Jaringan Distribusi 20 KV GI Garuda Sakti Penyulang Panam Dengan Metode Impedansi Hendri Agustin Sibarani; Firdaus Firdaus
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

Short circuit fault that occur in the distribution network can breakdown of electricity services to consumers. Therefore, the distance of the fault location needs to be known quickly and precisely. The impedance method can be used to estimate the fault location. Short circuit was simulated by using Panam distribution network model with ETAP 12.6 by applying phase to ground, phase to phase and three phase short circuit fault. The fault location was modeled on bus 19, bus 28, bus 43, bus 81 and bus 133. The input data used is the current and impedance of buses and substations from the simulation. From fault location distance calculation resulted the largest error is 0.0851% with 21,207 meters average distance difference for phase to phase fault, 0.0843% with 21,016 meters average distance difference for phase to ground fault, 0.0215% with 5,356 meters average distance difference for three phase fault.Keywords: distribution system, fault location distance, impedance method
Desain Litter Catcher Menggunakan Metode Quality Function Deployment (QFD) Dan Analytical Hierarchy Process (AHP) Reihan Fahrezi; Herisiswanto Herisiswanto; Anita Susilawati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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According to the observation the majority of people who dump garbage alongside the road, they throw it away from the vehicle. In this research designed a waste bin that can facilitate people who use vehicles to dispose of waste without having to get off the vehicle. In this research employed the Quality Function Deployment (QFD) method and the selection of alternatif designs using Analytical Hierarchy Process (AHP), Based on the results of open questionnaires, there were six voice of customer, which become parameters in litter catcher design that was easy to be emptied, according to standard, plastic trash writing on trash bin body, material of metal, box shape and easy to clean. Priority technical characteristics based on importance level were design with value of 27.72, finishing with value of 25.74 and construction with value of 23.76. The optimal design was chosen the alternatif design number 2 with a weight of 0.672 and CR 0.05 where the pairwise ratio that was expressed consistent.Keywords: Litter Catcher, Quality Function Deployment, Analytical Hierarchy Process
Syar’i Wedding Center Di Pekanbaru Dengan Pendekatan Arsitektur Islam Achnia Tiffany Nurfadillah; Pedia Aldy; Gun Faisal
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

Syar'i Wedding Center is a place to facilitate from the preparatory until the implementation of Islamic wedding that are in accordance with Islamic syari'at. In Pekanbaru, there is no building that has a special function for wedding processions and that applies the principle of syar'i in its services and facilities. Design application method of Islamic is in line with the functions of the building that will maximize concepts, themes, and design results both in form, appearance, ornamentation, zoning and material that will support the appearance of Islamic architectural styles. This design aims to facilitate the fulfillment of the needs of marriages in one area with the application of the principles of Islamic Architecture. Methods used include field data collection, literature study and empirical studies. The results of designed with the marriage bond concept which adopted the form and meaning of the application principles from Islamic Architecture in terms of varied forms of building that relate to the function, neutral building colors that resemble nature, using environmentally friendly and easily obtainable materials, different zoning applications, simple building, using ornaments and calligraphy that reminds God.Keywords: Islamic Architecture, Syar’i, The Marriage Bond, Wedding Center
Rancang Bangun Alat Pemantauan Trafik Kendaraan Di Universitas Riau Secara Real Time Menggunakan Lora Protokol Rio Wira Putra; Yusnita Rahayu
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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This study aims to gather information to count the number of vehicles come to University of Riau in real time and remotely using LoRa protocol, as one of kind data transmission can reach long distance. By counting the number of vehicles that enter every day, the University of Riau can use this data for studying materials in the construction of roads or parking area, that it can provide sufficient facilities in University of Riau.The LoRa protocol is one kind of the Low Power Wide Area Network (LPWAN) access technologies with wide range of characteristics, and easy to activation of devices. In this study, ultrasonic sensor is used to count the number of vehicles that enter daily to University of Riau. Data from ultrasonic measurement is going to sent to laboratorium electro with is approximately 2 kilometers using three point,measurement point, repeater point, and data observation point. Measurements is conducted one workday in the University of Riau environment. The results of this study are obtained that the number of vehicles come to the University of Riau is 1561 unit vehicle in 8 hours, also the reliability of the LoRa protocol used result in number for data transmission, range of transmission distance between 1-2 km, strong signal reception in average -97,47 dB, signal to noise ratio (SNR) as a quality of delivery parameters is 10,63 dB, and the value of the error frequency is -142,82 Hz that exists in data transmission on LoRa. Keywords: LoRa, ultrasonic,vehicles,real time,LPWAN
Pengaruh Tinggi Unggun Karbon Aktif Dan Pasir Kuarsa Pada Saringan Pasir Lambat Untuk Penyisihan Logam Fe Pada Air Sungai Siak Putriani Putriani; Shinta Elystia; Aryo Sasmita
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Siak river water into the many natural resources provide benefits for the inhabitants of nearby, but the condition of the river siak currently included in the critical category. One of the treatments to reduce levels of pollutants in river water is by using a slow sand filter using quartz sand and activated carbon. This research aims to determined the effect of high activated carbon and quartz sand as well as the best sampling time with the efficiency of removal of Fe parameters in slow sand filters, and compared the quality standards of PP No. 82 of 2001. The fixed variable uses in this research is the velocity of water flow on the sand filter is slow 0.3 m / hour and the sampling time is 0, 15, 30, 45, 60. The changeable variable uses consists of variations in bed height in the reactor namely : 10 cm gravel, 50 cm quartz sand, and 20 cm activated carbon; 10 cm gravel, 60 cm quartz sand, and 10 cm activated carbon; and 10 cm gravel, 70 cm quartz sand, and no activated carbon. Based on the results of the research after the slow sand filtering process obtained the best removal efficiency in reactor 1 for 60 minutes, the efficiency of removal of Fe metal by 97.52%.Keywords: Siak River, Slow Sand Filter, activated carbon, quartz sand, Fe metal removal.
Penggunaan Zat Aditif Graphene Pada Campuran Asphalt Concrete- Wearing Course (AC-WC) Syukri Hamdani; Muhammad Shalahuddin; Yosi Alwinda; Amun Amri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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One type of road pavement layers that susceptible to damage is Asphalt Concrete-Wearing Course (AC-WC). AC-WC is the top layer of the road pavement structure. One effort that can be carried out to improve the quality of asphalt pavement is to modify the asphalt mixture materials by using additive. Graphene is one of the materials that can be used as asphalt additive. Several previous studies have used this material in various reinforcement structures. The aim of this study was to determine the effect of using asphalt that has been mixed with graphene as the additive in the AC-WC mixture based on the value of Marshall characteristics. Variations made in this study were 0% (without mixture) as a comparison, 0.5%, 1%, and 1.5% of asphalt weight. This research was carried out by designing the AC-WC mixture based on the gradation specifications of combined aggregate for each variation. The specimens of Marshall test were made for each variation. Graphene was made by using the Electrochemical and Mechanical Liquid Exfoliation (EMLE) method. The results showed that the use of graphene as the additive in the AC-WC mixture affected the value of Marshall characteristics. The best value that meets the general specifications of Bina Marga 2010 revision 3 was obtained in the addition of 1.5% graphene, with stability value 1485 kg or an increase of 28.57%, flow value 4.25 mm, VIM value 6%, VMA value 18.3%, VFA value 65%, and MQ value 345 kg/mm.Keywords: Graphene, Additives, AC-WC, General Specifications of Bina Marga 2010 Revision 3, Marshall

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