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Kota pekanbaru,
Riau
INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
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Core Subject : Engineering,
Engineering
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Articles 3,145 Documents
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Analisis Pengaruh Biaya Fasilitas Terhadap Harga Jual Rumah Pada Perumahan Jenis Cluster Di Kota Pekanabru (Studi Kasus : Perumahan Harmoni Residence) Vemby Mailino; Rian Trikomara Iriana
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

Construction and property business prospects in the city of Pekanbaru is still quite promising when viewed by 2011 the building sector/construction accounted for the largest Pekanbaru City Regional Income ie 27.71 % of the other sectors. As the economic development increase rapidly in Pekanbaru indirectly cause an increase of housing need that is no exception for the luxury housing for the middle and upper classes. Housing type of cluster to be one of the preferred type of luxury residential facility offers infrastructure, facilities and utilities are complete. In a facilities construction cost housing projects included in indirect costs, while the construction of housing units included in direct costs. The cost of the facility housing development project will be charged to the home buyer on the housing. In other words, the price paid by the buyer during the purchase of the house was added to the cost of construction of such facilities. In this study identified what are the facilities offered by the Residence Housing harmony and how much influence the cost of the facility to the price of the total cost of construction per each type of home. The results of this study have been identified as for the facilities offered by The Harmoni Residence cluster housing types are roads, drainage, club house, swimming pool, green garden, fountain, office management, shade trees, street lighting, garbage cans, doors gate (one gate system), as well as CCTV security post. As well known the availability of the facility , facility costs charged to the type of 65/112 is equal to 7.70%, type 105/154 of 5.59 %, and type 135/180 of 4.62 % of the selling price per house type . Keywords : Direct Cost , Indirect Cost , Cluster , Facilities , Housing
Proses Pemurnian Selulosa Pelepah Sawit Sebagai Bahan Baku Nitrolesulosa Dengan Variasi pH Dan Konsentrasi H2O2 Rianto Harpendi; Padil Padil; Yelmida Yelmida
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

One of the raw materials for propellant or explosive double base type is nitrocellulose. Availability of cellulose which is the main component of biomass is very abundant in Indonesia, particularly solid waste palm oil industry. With cellulose content of 34.89%, palm midrib is one solid waste palm with potential to be used as the main raw material cellulose. Purity cellulose levels that must be achieved to produce nitrocellulose propellant as raw material is more than 92%. So as to improve the purity of the cellulose in the palm midrib must be purified using hydrogen peroxide, which is initiated by the hydrolysis with EFB ash extract. Hydrogen peroxide is a chemical that can be used for the bleaching process, because this compound is more environmentally friendly than chlorine. The purpose of this is to obtain the best conditions to obtain cellulose purity of more than 92%. The bleaching process is done by varying the concentration of hydrogen peroxide (1%, 2%, 3%, 4%, 5%) and pH (8, 9, 10, 11, 12). Pulp composition analysis of purified cellulose. Obtained the best process conditions is the concentration of 3% hydrogen peroxide and pH 9 with 95.11% purity cellulose.  Keywords :  Palm Midrib, Bleaching, Hydrogen Peroxide, Cellulose
Optimasi Kadar Maleat Anhidrat Dan Suhu Pada Pembuatan Maleated Natural Rubber Melalui Proses Grafting Yunus, Aulia; Yelmida, Yelmida; Bahruddin, Bahruddin
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

Natural rubber can be developed through a process called Maleated Natural Rubber grafting. A study about the influence of the composition of maleic anhydric (MAH) and temperature on the degree of grafting has been done before. The purpose of this research is to determine the optimum composition and temperature in the process of MAH grafted natural rubber. The composition of MAH is 7, 8, 9, and 10 phr with temperature conditions is 150, 155, 160 and 165oC. The grafting process use internal mixer operated at 60 rpm for 10 minutes. Grafting degree determined by titrimetric method where MNR in xylene solution titrated using MeOH solution. The results showed that the optimum composition and the temperature are 8.36 phr and 160oC with 3.62% grafitng degree.  Keywords: grafting degree, maleic anhydric, maleated natural rubber, optimation, temperatur
Fitoremediasi Air Tercemar Polutan Amoniak Dengan Memanfaatkan Eceng Gondok (Eichornia Crassipes) Fariez Fariez; Chairul Chairul; Said Said; ZA ZA
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

Contaminated wastewater pollutants ammonia can be done by phytoremediation using water hyacinth plants (Eichornia crassipes). To determine the absorption ability of water hyacinth to the polluted water of ammonia, a number of water hyacinth plants were placed in a test reactor, each filled with artificial water contaminated with ammonia 4x as much as 16 liters for 24 hours. Taken every 24 hours water sample is taken from each test reactor for analysis using a spectrophotometer at 640nm wavelength λ. The results showed that the longer the higher the percentage of absorption of dissolved ammonia absorption by water hyacinth plants in each test reactor nutrition factors in addition to the water hyacinthplants.  Keywords: Water Hyacinth (Eichornia crassipes), pollutants ammonia, phytoremediation
Pembuatan Bioetanol Dari Kulit Buah Nanas Dengan Metode Solid State Fermentation (SSF) Dan Pemurnian Dengan Proses Distilasi-Adsorbsi Dengan Variasi Ratio Bioetanol:Adsorben Safitri, Nadira; Chairul, Chairul; Amraini, Said Zul
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

Bioethanol is an ethanol which can be obtained by glucose fermentation from carbohydrate source that uses microorganisms help continued by distillation process. Adsorption is a separation process where the components of a fluid phase moves to the absorbing surface of the solid (adsorbent). In the fermentation process pineapple peel waste with Zymomonas mobilis and distillation process obtained the highest ethanol content of 11%, ethanol content obtained is not too high, so it needs a process that can increase the purity of bioethanol with distillation adsorption process. Bioethanol purification process using natural zeolite as adsorbent with variable change is the type of adsorbent of natural zeolite without activation with base activated natural zeolite and bioethanol:adsorbent ratio is 1:0,35 ; 1:0,5 ; 1:0,65. From the experimental results indicated that the highest ethanol content obtained of the zeolite and ethanol massa ratio of 1:0,65 with using base activated natural zeolite, ethanol content of 99,8% which fulfill Indonesian National Standard (SNI) for both technical ethanol and denatured bioethanol specification.  Keywords : bioethanol, solid state fermentation, pineapple peel, distillation adsorption, natural zeolite
Pengolahan Lindi Tpa Muara Fajar Dengan Proses Koagulasi Dan Membran Uitrafiltrasi Megah Mulia Ginting; Jhon Armedi Pinem; Elvie Yenie
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

Leachate is luquid which was produced from huge of waste at landfill. Leachate has organic substances which is potentially harmful of human and ecosystem. Because it can serve as a medium for the growth and development of  pathogenic microorganisms. This study aimed to determine the effect of coagulant  Aluminum Sulfate concentration in the coagulation-flocculation, membrane  resistance, flux and rejection percentages.  In the coagulation-flocculation process,  coagulant Aluminum Sulfate concentration was used 30 ppm. The process was done by quickly stirring in 200 rpm on 2 minutes and slow stirring in 60 rpm on 10 minutes with 30 minutes settling time of flocs. The precipitate formed and clear liquid were separated and the clear liquid was fed to the ultrafiltration membrane with variation of pressure at 1 bar, 1.5 bar and 2 bar.With 30 ppm coagulant the survey resulted was BOD5 reduced 25.00%, COD reduced 24.14% and TSS reduced 52.17%. After the membrane ultrafiltration process, the survey obtain the effective process is at 2 bar membrane pressure with number of rejection as following 71.43% of BOD5, 70.59% of COD  and 45.45% TSS. The fluks number is increasing align to pressure of membrane.   Keywords: Leachate, coagulation-flocculation, membrane  ultrafiltration,  Flux, rejection.
Karakteristik Mortar Geopolimer Abu Sawit Dengan Variasi Modulus Aktivator Halinda Putri, Winda Astuti; Olivia, Monita; Darmayanti, Lita
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

Geopolymer is an environmentally friendly alternative construction material that is made from activation of source material with rich in silicon (Si) and alumunium (Al) by alkaline activator solution. This research using palm oil ash from Riau Province as based geopolymer mortar. Properties of geopolymer mortar that was studied based variation of modulus activator, dosage activator, curing temperature, type of processing ash, and rest period. Research showed that increasing compressive strength of geopolymer mortar influenced by increasing modulus activator, dosage activator, and curing temperature with optimum condition, as well as combustion of palm oil ash in furnace, and rest period of geopolymer mortar for 3 days.  Keywords: palm oil ash, geopolymer, modulus activator, dosage activator
Karakteristik Fisis Dan Mekanis Abu Sawit (Palm Oil Fuel Ash) Dalam geoteknik Rizqi Yuliana; Muhardi Muhardi; Ferry Fatnanta
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

POFA is an agrowaste ash which is produced from fibers, nut shells, and empty fruit bunches when burnt at temperatures of about 800-10000C in boiler. The production of POFA is rising every year, it is disposed for landfills, now become an important environmental disposal issue. A large area is required for the disposal of these POFA waste materials. The landfill of POFA is the problem for the palm oil industry when it is not reused for any work. POFA contains a large amount of silicon dioxide with high pozzolanic reactivity and has high potential to be used in any engineering work. This research examined POFA characteristics in geotechnical application and its influence by curing periods on 0, 7 and 28 days. In this paper, physical and mechanical characteristics of POFA in geotechnical work will be shown. The chemical composition of POFA prove the existence of SiO2, Al2O3, Fe2O3 and CaO as important substances supporting pozzolan reaction during cured. The result shows that the characteristic of POFA has similar behaviour with sands. Coefficient of permeability decreased during curing periods. Besides, cohesion shear strength, angle of friction, cohesion undrained, and CBR value are improve during curing periods.    Keywords:  POFA, geotechnic, pozzolan reaction
Evaluasi Cepat Struktur Portal Beton Bertulang Terhadap Gempa Muttaqin, Muhammad Akbar; Yuniarto, Enno; Hendri, Andy
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

Earthquakes from 2004 to 2009 in Indonesia has resulted in many deaths and the collapse of the building. The American Society of Civil Engineers (ASCE) with the Federal Emergency Management Agency (FEMA) has published FEMA 310 as a handbook for seismic evaluation of buildings. FEMA 310 evaluation includes evaluation of phase one, two and three. Evaluation of phase one (tier 1) using a checklist of structural, non-structural, region of low sismicity and also geologic site hazard and foundation. Evaluation of the second phase (tier 2) is a linear analysis for structures such as static equivalence analysis and dynamic. Evaluation of the third stage (tier 3) is non- linear analysis of such a pushover. If the evaluation phase of the assessment does not meet the criteria, then it should proceed to the second phase, as well as for further evaluation. The building is located in the city of Pekanbaru that is reviewed and evaluated up to the second phase. Calculation of seismic shear force have used seismic hazard map of Indonesia has been published in 2010. This is one step to improve the performance of structures to resist earthquakes, it is expected that this will reduce structural damage and avoid loss of life. The results of the evaluation phase one (tier 1) that has been conducted shows that the buildings that were reviewed non- compliant for weak story and soft story. Evaluation of the second phase (tier 2) shows that all the columns in buildings were able to bear the load, while some beam were over strength, however both of building can be declared the buildings are safe against earthquakes (compliant).Keywords : Earthquake, FEMA 310, quick assessment, seismic evaluation
Pengaruh Kadar Serbuk Gergaji Dalam Proses Bioremediasi Tanah Tercemar Minyak Putri, Ade Rahayu; Amraini, Said Zul; Bahruddin, Bahruddin
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

Bioremediation is one of the most cost-effective and environmentally friendly methods to remediate many different types of waste materials widely used by many private and public entities. This research was conducted to determine the influence rates of sawdust in the bioremediation process of petroleum contaminated soil by using laboratory methods, in combination with the addition of fertilizer as sources of nitrogen. This research was conducted based on the 100:5:1 of C:N:P ratios, respectively. Test parameters needed to knowing the optimal condition in remediation were pH, moisture content and temperature. Results show the Total Petroleum Hydrocarbon (TPH) was degraded until 44% for the addition of 500 grams sawdust size 0.2 cm, 33% for the addition of 750 grams sawdust size 3 cm and 20% without any treatment within around two months. The addition of sawdust and fertilizer has increased the efficiency of TPH degradation and obtained positive relationship for the addition of fertilizer to the level of TPH degradation.  Keywords: bioremediation, sawdust, degradation, TPH, fertilizer

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