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INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
Arjuna Subject : -
Articles 3,145 Documents
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Pemodelan Parameter a Pada Hidrograf Satuan Sintetik Nakayasu (Studi Banding Dengan Hidrograf Satuan Sintetik Gama 1) M Ramadani; Manyuk Fauzi; Yohanna Lilis Handayani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Choosen of hydrograph parameter  (α)  on hydrograph synthetic of Nakayasu is subjective depends on raising and recession of the hydrograph’s arc and often got problem on choosen hydrograph parameter (α). The research aims are to determine equation of α (alpha) on hydrograph synthetic of Nakayasu method, and also to analyse effect of river characteristics on α based on volume control. Results show that long of watershed and area of watershed were influenced equation of α..Calculation produce
Analisis Risiko Pembangunan Jalan Tol Pekanbaru - Dumai Pada Tahap Konstruksi (Studi Kasus Jalan Tol Pekanbaru - Dumai) Zulfiqar, Muhammad; Sandhyavitri, Ari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Pekanbaru-Dumai highway is now an important highway, the condition of the existing road are consist of 2-lane  road 2-way, predictable way Pekanbaru-Dumai will experience overcapacity in  Kandis-Dumai section in 2015.  To overcome this situation the toll road is planned.  The investment of  highway construction will always be involved in risk with certain scale,  it is necessary to do the risk analysis. The purpose of this study is to identify and analyze the risk, measuring of risk probability point and risk impact and  risk test by  performing simulations using @Risk For Excel software.  This research was conducted using  a survey method and interview  with respondents. The survey was conducted in three phases, namely: beginning survey, preliminary survey and detailed survey. Based on research conducted identified four risk factors are financing risk, construction risk, equipment risk and force majeure. These four risks are identified in the medium risk category. The influence  level of  risk impact  to  the increase of construction investment budget plan Pekanbaru-Dumai toll roads as a whole amounted to 8.07% (Rp. 1,183 trillion) with risk factor  for 0,549  then classified as medium risk. While detaily 15% (Rp. 2,194 trillion) by a factor of 0.685 then risk being classified as at risk. The most sensitive  risk is the risk of development. Keywords: Risk Analysis, Impact, Pekanbaru-Dumai, Toll Road, Probability
Kajian Kelayakan Ekonomi Proyek Dan Tarif Air Bersih Berdasarkan Metode Contingen Valuation Kota Dumai Ferry Anggriawan; Ari Sandhyavitri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The main purpose of this study is to determine the appropriate water rate based on the willingness to pay  Dumai city . This is due to the growing need for clean water in the city of Dumai  each year while the supply of clean water provided by the government is very limited. The method used in this research is  contingent valuation by  using the Statistical package for the social sciences (SPSS) to estimate the water rates in the city of Dumai. Of the water rates will be in the analysis of the Net Present Value, Benefit cost ratio, break-even point and the internal rate of return clean water projects Dumai. Addressing the needs of the water carried phasing with 4 scenarios for each of the water supply capacity starts from 80 Liter / sec in the year 2013-2014 and 160 liters / sec in the year 2016-2032. Results of analysis gives an overview of the feasibility of water  rates  projects in the city dumai with water service coverage includes 4  Dumai  of  District. East Dumai, Dumai Dumai City and South. Keywords: water rates, project feasibility, water clean, contingent valuation
Pengolahan Air Limbah Domestik Menggunakan Tanaman Alisma Plantago Dalam Sistem Lahan Basah Buatan Aliran Bawah Permukaan (SSF - WETLAND) Amalia Masturah; Lita Darmayanti; Yohanna Lilis H
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The rapid growth of  the Indonesian  population  will  produce  more and more wastewater. Throwing domestic wastewater directly without treatment had caused the water pollution. One of simple, easy, low cost in maintenance and operation technology to decrease the pollutant in wastewater is constructed wetland. This research is aimed to know the efficiency and the best of detention time Subsurface Flow Wetland 2 levels with peat soil media and plant of Alisma plantago in treatment of domestic wastewater. The quality parameters of water that  was tested  are  pH, COD, and TSS.  Statistic calculation that was used in this research is Anova (Analysis of variance) of one way. The best efficiency for pH 31.7%, COD 82.1%  and TSS 90.3% in variance 4 with time of detention 4 days in reactor 1 and 1 day  in reactor 2. The  results showed  that the constructed wetland  2 levels  using  peat  soil media  and  plant of Alisma plantago  can  improve the quality of wastewater. Keywords: Wastewater, constructed wetland, alisma plantago.
Kajian Model Estimasi Erosi Tanah Menggunakan Pendekatan Modified Universal Soil Loss Equation (MUSLE) Studi Kasus Hulu Kanal Duri Andreas Panjaitan; Imam Suprayogi; Trimaijon Trimaijon
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Sedimentation-erosion that happed at top canal of Duri is one of problem that must be described in analyzing DAS because canal of Duri is multifunction of canal that usefull in wealth of people. Method that used is analysis using some formulas of erosion-sedimentation such as USLE and MUSLE, MUSLE it self is the development of USLE method by changing erosivitas factor with flow factor. Prediction result of erosion potential with MUSLE model show that sedimentation happened at top canal of Duri condition of closing land 2012. It has amount 31.16 ton and in 2002 was 29.38 ton. It shows that sedimentation that happened 2012 was bigger than the sedimentation that happened before in 2002. This happened, because of the changing of closing land happened, had caused the increase of top debit in rain. as a result of the increasing of koefisien of surface flow. Erosion prediction with USLE model at top canal of Duri in 2002 was 45.72 ton/ha/year. Show that the result depends on how high the rain falls. The higher of rain falls the bigger of land erosion. Key word: Erosion-sedimentation, closing land, rain falls
Analisis Sifat Fisik Dan Mekanik Kayu Kelapa Sawit Hasil Kompregnasi Melamine Formaldehyde Bambang Arif Hidayat; Alfian Kamaldi; Fakhri Fakhri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

During the past time the utilization of palm oil tree only limited to producing fruit to produce oil with all their derivatives, as well as the utilization of  husk and midrib. Stem, as the biggest mass palm oil tree has not been used commercially due to its lack of quality. One effort in improving quality of palm oil wood is compregnation. Compregnation interpreted as an effort of putting the chemicals into wood structure using prresure. Chemicals that can penetrate into wood structure in this case is melamine formaldehyde resin. The result of research showed that compregnation palm oil wood by melamine formaldehyde increased the specific of gravity of wood from 0,32  before compregnation to 0,48, 0,58 and 0,65 for 50%, 75% and 100% concentrate. Moisture content decreased from 12,05% before compregnation to 10,67 at 100% concentrate. MOR increased  from 64,58 kg/cm2 before compregnation to 131,54 kg/cm2, 188,94 kg/cm2 and 361,14 kg/cm2 each for 50%, 75% and 100% concentrate. Keyword:  Elaeis guineensis Jacq, Compregnation, Melamine Formaldehyde,  MOR
Pengaruh pH Dan Waktu Pada Pengolahan Limbah Cair Cpo Dengan Proses Ozonasi Novermen Novermen; Syarfi Syarfi; Jecky asmura
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

There have been several methods widely developed for crude palm oil (CPO) extraction from palm oil fruits, which produces liquid waste around 60% from the total production capacity. This liquid waste contains organic over than maximum limit, which is permitted by environmental quality standards of ministerial decision LH No. KEP-51/ MENLH/ 1995. one of the technologies that can be used is the Ozonation technology. It is done by contacting Palm Oil Mill Effluent (POME) with ozone. Ozon is produced from  the ozone generator with 18 watt power, with concentration 0,1068 mg/s.  Ozone serves to reduce chemical oxygen demand (COD), oil, and total solid (TTS) in crude palm oil factory. This research was conducted with variation of PH, 8,10, and 12 with NaOH addition  and variation of time 10, 20, 30, 40 minutes. The research finding obtained that the efficiency  chemical oxygen demand (COD) could reach maximum 90 % , with PH 8 in 40 minutes.  Keyword: COD, POM, Ozonation, Total solid
Biodiesel Dari Limbah Ikan Baung (Mystus Nemurus) Dengan Katalis Padat H-Zeolit Hadyan Sartoni; Syaiful Bahri; Sunarno Sunarno
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Biodiesel  is  an  alkyl esters  of  long chain  fatty  acids  derived  from  fatty material  such as animal fat. A research synthesis of biodiesel from waste fish oil of baung into biodiesel with a solid H-zeolite catalyst. In this research review of physical properties (density, viscosity and acid number), analyzing the chemical content of biodiesel, the influence of the molar ratio of methanol  to  fish  oil  baung  the  percentage of  conversion  and  optimal  transesterification catalyst in the transesterification reaction in biodiesel synthesis. 50 grams of fish oil, versus 1:6 methanol  to oil molar, catalyst 10% of the weight of oil  input into  the biodiesel reactor and then  the process of biodiesel synthesis performed on  the operating conditions of 60 ° C temperature  and  stirring  speed of  200  rpm for  200 minutes.  The results  showed  that  the optimum  conversion  catalyst with  10% methanol  1:5 molar ratio  that is  equal to  87.02%. Physical test  results obtained by the density of 890  kg/m3, 5.48  cSt  viscosity, acid number 0.7013 mg-koh/gr sample. Results of analysis of chemical constituents by GC-MS, obtained the dominant component  in the  catalyst  biodiesel with  10% methanol  1:5 molar ratio was 51.03% oleic methyl ester, methyl ester palmitic 18.76%, 9.50% linoleic methyl ester, 4.46% stearic acid methyl ester, methyl ester 2.00% elaidic. Results obtained have characteristics approaching the characteristics of biodiesel Indonesian National Standard (SNI). Kata kunci : fish oil, Biodiesel, H-zeolite catalyst, transesterification
Proses absorpsi Gas H2S Menggunakan Metildietanolamin W, Ririen; Bahruddin, Bahruddin; Zultiniar, Zultiniar
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

H2S  in the oil and gas industry is undesirable because it can lead to corrosion of pipes and equipment production. The purpose of this research is to study the effect of distance and the injection  of absorbent flow rate.  Absorption processes carried out continuously with free variables absorbent flow rate of 40 ml/min, 60 ml/min, 80 ml/min and 100 ml/min, with a distance of injection of 110 m, 140 m , and 170 m. The results  of  absorption  H2S was measured by using a gas detector tube system.  H2S absorption process using methyldiethanolamine  as  absorbent  with  flow rate variation of 40 ml/min is 170 ppm, absorbent flow rate of 60 ml/min is 150 ppm,  absorbent flow rate of 80 ml  /min and 100 ml/min which is 125 ppm . The concentration of H2S  for  the distance variation injection of 110 m that is 175 ppm , a distance of 140 m the injection of 150 ppm and at a distance of 170 m the injection of 125 ppm . The optimum conditions of hydrogen sulfide gas absorption process using methyldiethanolamine occurs at a flow rate of 80 ml/min at a distance of 170 m injection of H2S  that can absorb as much as 58 % . The results showed that the greater the flow rate of the absorbent and absorbent injection of the longer distance, the greater the absorption of H2S gas that occurs . Keyword: absorption, corrosion, H2S,  methyldiethanolamine
Konversi Tongkol Jagung Menjadi Bio - Oil Dengan Bantuan Katalis Zeolit Alam Secara Pyrolysis Siti Rahmah; Yusnimar Sahan; Syaiful Bahri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 1, No 1 (2014): Wisuda Februari Tahun 2014
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Bio-oil is obtained from corn cobs  (Zea mays  L.)    biomass by using pyrolisis process with a natural zeolite catalyst ratio between the sample and catalyst. This research was conducted by using a pyrolysis reactor, 500 ml of thermo-oil (silinap) are fed into the reactor pyrolisis . Then the pyrolisis process is started by flowing the nitrogen gas 1.35 mL / sec into the reactor and  pyrolisis process is aloowing run 3 hours. In order to get the maximum yield of bio-oil, there were determined the affect of ratio variation between biomass and catalyst (50:1, 50:2 and 50:3 g), and variation of pyrolysis temperaturec(270, 300 and 330oC). as a comperison the pyrolysis process without a catalysthas done. The result of this research, the higher yield of bio-oil is 84,9% which obtained under condition ratio a sample and a catalyst 50:2 g, and a pyrolysis temperature 330oC. Based on the result of characterized of bio-oil, density is 0.899 g / ml , 7.133 cSt viscosity , acid number 0.097 g NaOH / g sample , and the flash point 54 º C. Based on the results of GC-MS analysis showed that the dominant component in the bio-oil by using 2 grams of natural zeolite and 330oC are Cyclohexane,1-ethyl-1-methyl 15.96 %; pentan ,2,2,4, 4 tetramethyl 5.78%; 1-pentene, 2,4,4  –  trimethyl 5.78%; 2,3,4,4-trimethyl-pentene 4.99% and 2-pentene,2,4,4-trimethyl 2.44 %. Key Word : Bio-oil, Corn Cobs, Natural Zeolite, Pyrolisis.

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