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INDONESIA
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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Application of Activated Carbon Compost Raw Material As Adsorbent For Removal Of Peat Water Dyes Desmawita, Dwi; Yenie, Elvi; Daud, Syarfi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Peat water has a low pH (3-5), brown (124-850 PtCo), and contains many organic substances that do not meet the standards of water quality requirements as Permenkes No.416/MENKES/PER/IX/1990. Therefore it is necessary for processing methods to eliminate pollutants contained in the peat water so it can be used according to quality standards, either by adsorption. Adsorbent used in this research is compost. Compost carbonized by variation of 30, 60 and 90 minutes, which is activated in physics at a temperature of 500 ° C. Adsorbent mass variations as much as 1, 2, 3, 4 and 5 grams with a stirring speed of 100 rpm for 120 minutes. Characteristics of activated carbon in the form of compost moisture content, ash content, volatile and fixed carbon content obtained the best results in 60 minutes with a water content of 4.00%; ash content 0.99% volatile 1.57% and fixed carbon 97.44%. The efficiency of color reduction was measured using a UV-VIS spectrophotometer. The result showed that the highest efficiency was 81,63% at carbonization time 60 minutes with mass 5 gram and the lowest efficiency value was 66,57% at carbonization time 30 minutes with mass 1 gram.Keywords : Adsorbent, activated carbon, compost, color.
Pembuatan Biodiesel Dari Minyak Biji Kapuk (Ceiba Pentandra) Dengan Katalis Lempung Teraktivasi; Pengaruh Kecepatan Pengadukan Putri, Erlisa Yanuari; Bahri, Syaiful; Saputra, Edy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Biodiesel producted by transesterifiation reaction which on energy source. Biodiesel was developed in Indonesia as an anticipatis of energy crisis problem suppported by goverment national energy policy. This research is aimed to make biodiesel from cotton seed oil, studying the effect of agitation speed to the amount of biodiesel produced and determined the best catalyst activated by acid or base, and determined the characteristics of biodiesel produced. The transesterification process was occured at a temperature of 60oC, on weight of oil 100 grams, reaction time 1,5 hours, mole ratio of oil to methanol 1 : 9, catalyst concentration 0,5% -weight of oil for varions of agitation rate 400, 500 and 600 rpm, and variations of catalyst acid 0,47, 0,62 and 0,78% and alkaline activated with a concentration of 0,33, 0,44 and 0,66%. From the result was obtained the highest biodiesel yield of 95,45% for alkaline activated 0,66% for agitation speed of 400 rpm. Characterization of physical properties of biodiesel obtained here density of 878 kg/m3, 3,03 mm2/s kinematic viscosity, acid number 0.34 mg KOH/g sample, and the flash point 195oC.Keywords: biodiesel, clay catalysts, activation of acids and bases, transesterification
Optimasi Temperatur Cooling Water Pada 25ºC Dan Hot Water Pada 60 ºC Dengan Variasi Waktu Siklus Pada Sistem 2 Bed Adsorption Chiller Saragih, Krist Mamre; Martin, Awaludin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
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Abstract

Adsorption chiller has one of the solution related to enviromental issues by conventional refrigeration. This paper presented the optimization temperature cooling water and hot water from sistem adsorption chiller. Performance of adsorption chiller influenced by temperature hot water inlet and temperature cooling water inlet. To optimization temperature hot water inlet, temperature cooling water stay at 30ºC and to optimization temperature cooling water inlet, temperature hot water stay at 65ºC. According to this research temperature optimal hot water inlet 60ºC in time cycle 700s with COP 0.36% and cooling power 0.72kW but temperature optimal cooling water inlet 25ºC in time cycle 700s with COP 0.31% and cooling power 0.73kW.Keyword : Adsorption chiller, Cooling water, Hot water, COP, Cooling power
Perbandingan Metode Bina Marga Dan Metode PCI (Pavement Condition Index) Dalam Penilaian Kondisi Perkerasan Jalan (Studi Kasus : Simpang Lago - Simpang Buatan) Copricon, Deby Elfi; Wibisono, Gunawan; Sandhyavitri, Ari
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
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Abstract

There are methods that can be used to evaluate pavement conditions, such as Bina Marga and PCI (Pavement Condition Index) methods. In the Bina Marga method, the determination of road condition values are done by summing numbers and values of damage conditions, while PCI method is based on type, rate and area of distresses. This study attempts to compare the two methods in determining a road segment pavement condition (i.e. segment of Simpang Lago to Simpang Buatan, Riau). The road segment was divided into 6 sub segments. Primary data obtained from field surveys and secondary data were used. The priority of pavement maintenance actions was ranked from 0 to 7 for Bina Marga method, and from 0 to 100 for PCI method. The comparative analysis showed different results between the two methods in terms of pavement condition values and maintenance actions. Based on each method’s pavement condition rank, the condition values of the sub segments were 9, 10, 10, 10, 9, 10 for Bina Marga method which all needed for routine maintenance. The PCI method gave larger range of condition values, i.e. 82, 79, 57, 28, 28,and 27.keywords :pavement condition,bina marga, PCI
Tinjauan Kelayakan Finansial Pada Hotel Berjenis Kondotel Studi Kasus : Proyek Pembangunan Kondotel Pekanbaru Park Sulton, Eko syalahuddin; Taufik, Hendra; Sebayang, Mardani
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
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Pekanbaru economic growth is relatively advanced to make this city a place to invest in the calculated by the investors one of them is investment in the field of hospitality. Investment inthe hospitality sector has a big risk if not prepared thoroughly, this is because in its construction requires a very large capital, therefore it is very important to review and analyzethe financial feasibility. In this research, it is reviewed about the financial feasibility of Condotel type hotel, which is in Kondotel Pekanbaru Park which is a hotel owned jointly by several owner and managed by hotel manager and its profit and profit will be shared between fellow hotel owners and managers. Financial analysis is done by analyzing the calculation of Net present value, benefit cost ratio, internal rate of return, payback period and also sensitivity analysis. The results obtained are total investment kondotel Rp. 192.670.744.974,35 with NPV of Rp. 67.877.696.368,23, BCR of 1.2, IRR of 24,97% greaterthan the return current of 13.5% and PBP for 9 years 7 month 17 days (project plan life for 50 years). Overall the investment project for the development of Kondotel Pekanbaru Park is feasible to build with the hotel occupancy rate of 66%. Investor standard room or SMI get profit of Rp 33.102.537,58 / year and free stay for 21 point / year. While the investor room suite or SMI corner get a profit of Rp 40.138.145,99 / year and free stay for 21 point / year with discount payback period in year 14.Keywords: Financial Analysis, Condotel Pekanbaru Park, Occupancy Hotel, Sensitivity Analysis, Investor.
Indeks Kekeringan Provinsi Riau Menggunakan Teori Run Berbasis Data Satelit Sharie, Barcha Yolandha; Fauzi, Manyuk; Rinaldi, Rinaldi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Drought disaster is caused by the decreasing of rainfall from normal condition and the duration of dry season. And the effect is show the reducing of water availability. Based on the drought disaster risk index map by National Disaster Management Agency, can be seen that 40-60 % Riau Province got drought. Therefore, it is necessary to anticipate to reduce the impact of drought by calculate the drought index using Run Theory. Drought index can be used to indicate the longest and the greatest number of drought. The rain data who used for the calculation of the drought index is satellite rainfall data in the last 8 years from 2009 to 2016 for every district in Riau Province. The rainfall data is divided into 2 groups, 15 days for daily rainfall data and 30 days for monthly rainfall data. For 15 daily rainfall data, the longest drought duration is 7.5 months and the greatest number of drought is 494.943 mm. While for monthly rainfall data, the longest drought duration is 12 months and the greatest number of drought is 508.6 mm. based on calculation classification level of drought for dryness criteria 15 daily rainfall data from Indragiri Hilir as many as 5 times incident. For monthly rainfall data is Rokan Hilir, Pelalawan, and Kuantan Singingi as many as 3 times incident. Level of drought depiction map using ArcMap 10.1 software.Keywords: Run Theory, drought index, level of drought classification, satellite rainfall data
Pembuatan Biodiesel Dari Crude Palm Oil (CPO) Dengan Katalis La/NZA Setianingsih, Ayu; Bahri, Syaiful; Wisrayetti, Wisrayetti
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Total petroleum reserves are declining causing high world oil prices, to overcome this it is necessary to develop alternative renewable energy derived from vegetable oil, one of which is biodiesel. Purposes of this research were to produce biodiesel from CPO, determine the characteristics of catalyst and biodiesel. The La/NZA catalyst is made by activation the natural zeolite, then La is impregnated into NZA having continued variations of 0, 1 and 3% (w/w) of NZA, then dried using oven and calcination, oxidation and reduction. Production of biodiesel is carried out through two stages: esterification and transesterification. The highest yield resulted on using 1%La/NZA catalyst with catalyst weight 3% which is 85.37%. Characteristics of the catalyst that has a surface area and morphology. Biodiesel characterization in accordance with national standards.Keywords: biodiesel, CPO, La/NZA, transesterification
Analysis Of Configuration And Performance Of Arrester For Protecting Substation Against Impulse Lightning Using ATP-EMTP Software Adri, Alfian; Hasyim Rosma, Iswadi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
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Electrical energy is one of the most important and often used energy in life. Therefore to keep the availability of electricity, it takes a power company that will manage the electricity needs. One of the things that affect to the reliability of the equipment is need to know the configuration of the electrical equipment protective device. As known that transmission line is very vulnerable to lightning strikes that produce a traveling wave. It can enter the substation and make the existing equipment in danger. Based on the problems we need to analyze the configuration and performance of the arrester against the impulse lightning. This study was conducted by simulating lightning strikes on equipment using ATP-EMTP software by varying the strike and the distance of the arrester protection for protected transformer in order to get the correct distance to minimize the optimum voltage. The result of the simulation by varying the distance from 3 m, 6.7 m, 9 m, 15 m, 21 m, 27 m, 28.5 m, the safer distance and the smaller peak voltage which is protected by the arrester to the transformer is 21 meters from the current variation at 10 kA, 30 kA, and 60 kA where the lowest peak voltage of phases A, B, and C are compared with other distances. Then the distance 21 m better than the distance of 6.7 m used by PT.PLN (Persero) Garuda Sakti Substation.Keywords: Arrester, ATP-EMTP, Arrester configuration.
Analisis Potensi Erosi DAS Sungai Merbau Dan DAS Sungai Ukui Terhadap Sedimentasi Danau Kayangan Febiansyah, Dharma; Mudjiatko, Mudjiatko; Trimaijon, Trimaijon
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
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Land use change in Merbau and Ukui Watershed (DAS) as an effort to fulfill the need of land for settlement and other supporting infrastructure in Pekanbaru city will increase the potential oferosion and sedimentation in the watershed. This impact will have a major impact on the functional life of lake khayangan. Geographic information system is used to assist data analysis of land use,length and slope of land and vegetation distribution. The results of the analysis show the total erosion potential of the Merbau River Basin, the Ukui River Basin and the Direct Stream is 364,610tons / year and the total of sediments entering Lake Kayangan is 459,474 tons / year, with the elevation of siltation that occurs on Lake Kayangan is 0 , 22 mm / year.Keywords: land use change, erosion and sedimentation potential, siltation.
Pengaruh Penambahan Limbah Sisa Penyaringan Minyak Kelapa Sawit Sebagai Bahan Tambah Terhadap Kuat Tekan Dan Kuat Lentur Beton Garcya, Muhammad Gala; Djauhari, Zulfikar; Kurniawandy, Alex
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
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The research aims to obtain the characteristic of concrete using Spent Bleaching Earth (SBE) as substitute material on normal concrete. It is focused on compressive strength, setting time, and flexure strength. The percentage of SBE it used are 0%, 2%, and 4% of the cement weight. The result show SBE is not suitable to be a cement replacement because it show the decrease of compressive and flexure strength. But the setting time on SBE is slower than 0% SBE substitution and need more time to harden than normal concrete.Keywords : Spent Bleaching Earth, setting time, compressive strength, flexure strength

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