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INDONESIA
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains
Published by Universitas Riau
ISSN : -     EISSN : -     DOI : -
Core Subject : Engineering,
Engineering
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Articles 3,145 Documents
 104   105   106   107   108 
Geopolimer Berbasis Abu Terbang (Fly Ash) Boiler Pabrik Pulp Dengan Penambahan Grafena Oksida Setiani Br Manurung; Amun Amri; Syamsu Herman
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Geopolymer has been successfully synthesized from boiler fly ash with the addition of Graphene Oxide (GO). The addition of graphene oxide is to enhance the mechanical properties of organicfly ash based geopolymer. Graphene oxide was made by using graphite from used batteries via Hummer method. The resulting graphene oxide solution was mixed with an alkaline activatorsolution (NaOH and Na2Si2O3) and stirred with a mixture of fly ash and sand. Once homogeneous, it was then poured into the mold and heat treated at temperature 900C for 24hours. A compressive strength test was performed using material testing equipment. The experiment results showed that the compressive strength of geopolymer with addition of GO wasincrease 44,67% in comparison with the geopolymer without GO. This results is very exciting to upgrade the quality of organic fly ash based geopolymer to reduce the use of conventionalcement due to of high carbon emission/polutant of conventional cement. In addition, this research can also reduce the abundant fly ash waste and overcome the accumulation of used batteries.Keywords: compressive strength, geopolymer, graphene oxide, hammer, fly ash
Optimasi Jalan Pahat Dan Analisis Biaya Produksi Proses Pemesinan CNC Lathe Pembuatan Piston Master Cylinder Rem Sepeda Motor Yamaha Menggunakan CAM Nico Atmadio; Anita Susilawati
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

Tool path optimation on CNC lathe machining can set up every movement of tools move optimally to minimize processing time of a workpiece. This research purpose is simulation of tool path the CNC lathe machining for the manufacture of piston master cylinder brake of Yamaha Motorcycle by using CAD/CAM software. First design was made geometry of piston master cylinder using Computer Aided Design (CAD). Tool path was designed into 3 variations of scheme with absolute and increment of programming system using Mastercam v9. Then it was simulated to get the most optimum processing time. Simulation result was obtained longitudinal scheme time for absolute coordinate system 14 minutes 45 seconds and increment coordinate system 14 minutes 5 seconds, surface to parallel scheme for absolute coordinate system 14 minutes 30 seconds and increment coordinate system 13 minutes 48 seconds, diametrical scheme for absolute coordinate system 17 minutes 39 seconds and increment coordinate system 17 minutes 12 Seconds. The optimal processing time for making the piston master cylinder brake of Yamaha Motorcycle used the toll path of surface to parallel increment coordinate system with production cost Rp. 6.912,81,-/pcs.Keywords : Piston master cylinder, Tool Path, Absolut, Inkremen.
Pengaruh Laju Aerasi Terhadap Produksi Kitinase Oleh Trichoderma Asperellum TNJ63 Riko Naldo Saputra; Sri Helianty; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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Chitinase is enzyme that hydrolyze chitin compound in β-1,4-N-acetyl-glucosamine into monomer N-acetyl-glucosamine, which widely occurs in nature. This enzyme is potentially applicable in the field of pharmaceuticals for the treatment of cancer, tuberculosis, asthma, diabetes, allergies and infections. Chitinase can be produced by microorganisms chitinolytic are numerous in the biosphere, one of the local isolates Trichoderma asperellum TNJ63. In this research, scale up production of 25 mL to 1.5 L medium. Fermentation was carried out in a 2 L stirred tank bioreactor using methods submerged fermentation (SmF) with the substrate chitin from shrimp shells. Chitinase production conducted for 9 days with stirring speed of 40-60 rpm, and the effect of aeration rates (0 vvm; 0.5 vvm; 1 vvm and 1.5 vvm) studied the chitinase activity produced. The highest chitinase activity was obtained at 1 vvm aeration rate and fermentation time of 7 days with 0.0160 U / mL through analysis UV-Vis spectrophotometer with a sugar analysis method, Nelson-Somogyi.Keywords: aeration, chitinase, scale up, shrimp shells, Trichoderma asperellum TNJ63
Pengaruh Massa Adssorben Terhadap Adsorpsi Pergasol Red Dengan Proses Batch Menggunakan Cangkang Kulit Telur Terkalsinasi Sanredina Sanredina; Rozanna Sri Irianty; Yelmida Yelmida
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Abstract

Waste dye untreated directly discharged into the environment and society can result in negative impacts on people's lives. One effort to reduce the content of azo dyes in solution Pergasol Red namely the adsorption process. The purpose of this study to determine the effect of mass adsorption at adsorption Pergasol Red uses powdered eggshells calcined. Pergasol Red 60 ppm solution of 200 mL added with a trowel powdered eggs with a variety of mass 1 g and 2 grdidalam erlenmeyer stirred with a speed of 200 rpm 40 ° C. Then the solution was analyzed using a UV-VIS spectrophotometer to determine the final concentration Pergasol Red after absorption. The more the number of egg shell powder mass concentration Pergasol Red adsorbed higher. A mass of 1 g and 2 g Pergasol Red adsorbed concentration as much as 56.3 ppm and 57.6 ppm with the effectiveness of the absorption of 96.1%. Keywords: adsorption, skin powdered eggs, Pergasol Red,
Penyisihan TSS pada Air Limbah Sawit Di Dalam Flat-Fotobioreaktor Menggunakan Chlorella sp. Yang Diimmobilisasi Lidya Anggraini; Shinta Elystia; Sri Rezeki Muria
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
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High production of palm oil contributes to the high waste water produced. This is because the high water consumption during the production process is about 5 m3 per processing of one ton of fruit palm. The palm oil mill is an important concern because it contains organic materials, tannin compounds and high soluble solids. So it takes an environmentally friendly processing to eliminate pollutants so as not to cause environmental damage. Therefore, in this research, the effluent treatment using Chlorella sp. which is immobilized to exclude TSS parameters. Cell immobilization process is done by using calcium alginate as a polymer to form beads. In order to obtain stable and high efficiency beads, variations of Na-alginate concentration (4%, 6%, 8%) and contact time (1, 3, 5, 7 days) are obtained. Based on the result of the research, it is found that the most stable bead is made of 8% Na-alginate with a removal efficiency of 35.3-76% within seven days.Keywords: Chlorella sp, COD, Contact Time, Na-alginate, Palm Oil Mill Effluent, Total Nitrogen, Total Suspended Solid.
Pengukuran Produktivitas Ozon Sebagai Oksidator Senyawa Organik Pencemar Wanda Suwarno; David Andrio; Jecky Asmura
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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Abstract

Ozone is one of strong oxidant agent with potential oxidation value of 2,08 eV. Character of ozone are sharp-smelling and an unstable form composed of three oxygen atoms (O). Since 1990s, the using of ozone developed very wide and rapidly where ozone is used for drinking water treatment and wastewater treatment, sterilization of food and equipment, preservatives and odor removal. Ozone known with radical hydroxyl (OH•) which easily react with organic or inorganic compounds. In this research aims to calculate and measure the productivity of ozone generator with brand ozonizer WS88011i. This research used oxygen from the ambient air as the feed gas. Productivity of ozone generators analysis by iodometry refers to the International Ozone Association Standarized Ozone Procedure Iodometric Method 001/1996. The results showed the productivity of ozonizer WS88011i based on corona discharge method can produce dosage of ozone with range 0,239 - 0,264 g/hour.Keywords: ozone, ozone generator, productivity of ozone
Analisis Produksi Gas Metana (CH4) Dan Karbon Dioksida (CO2) Dari Tempat Pembuangan Akhir Kota Pekanbaru Herfi Rahmi; Aryo Sasmita; Elvi Yenie
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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In 2013, Municipal Solid Waste (MSW) of Pekanbaru was transported to landfill reach 14.631 tonnes/month from 999.031 people with 4,06% population growth rate. The waste in landfill will be decomposed in anaerobic digestion process and produced methane (CH4) with composition of 45%-60%. Based on Peraturan Menteri Pekerjaan Umum Republik Indonesia Nomor 03/Prt/M/2013 the operational of the landfill either by controlled landfill or sanitary landfill should be able to control the landfill gas, ensure the worker safety and emergency response and management of flammable threat. This research predicted the production and dispersion of methane gas and carbon dioxide from MSW of Pekanbaru landfill from anaerobic fermentation process. Production of methane gas and carbon dioxide were analyzed with LandGEM. Based on the LandGEM analysis shown that the total landfill gas from Pekanbaru landfill in 2020 will reach 3.147.585 m3/year equalsto 359,313 m3/hour. Total methane generation will reach 1.888.551 m3/year equals to 215,588 m3/hour and 1.259.034 m3/year equals to 143,725 m3/hour for total carbon dioxide.Keywords : production, dispersion, methane, carbon dioxide
Durabilitas Mortar Bubuk Kulit Kerang Di Air Gambut Ismi Siska Rahmayani; Monita Olivia; Edy Saputra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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In this study, blood clam used as filler in mortar. The specimens were cured in distilled water until 28 days. Then specimens were immersed in peat water until 91 days. The parameters studied include compressive strength and porosity. These properties were compared with those of a control mortar that was made of Ordinary Portland Cement (OPC). The main parameter of this study was the proportion of waste blood clam (4% by cement weight). The results showed that the compressive strength of mortar with blood clam are increase more than mortar OPC. Mortar becomes more resistant because it was filled by the blood clam.Keywords: blood clam, durability, filler in mortar, peat water, compressive strength, porosity
Pengembangan Alat Ukur Potensi Solar Photovoltaic (SPV) Menggunakan Arduino Amanda Khaira Perdana; Iswadi Hasyim Rosma
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
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Utilization of solar energy system is one of the most promising renewable energy resources to meet the energy demand. This resource has been developed and utilized in many countries. Indonesia, as one of the tropical countries has been blessed with a huge amount of radiant energy from the sun during the whole year. However, the solar energy resource data is very limited. Therefore, the purpose of this article is to develop an automatic solar measurement to measure the potential of solar energy resource. The availability of solar energy resource data are the foundation of information for designing, utilizing and deploying of solar energy generation and technologies. The automatic solar measurement has been tested and found that it has capability to measure not only solar radiation data but also other related parameters such as air temperature and humidity with significant accuracy.Keywords—solar energy source, microcontroller Arduino, solar radiation, temperature, relative humidity
Evaluasi Penigkatan Curah Hujan Untuk Mitigasi Bencana Kebakaran Lahan Gambut Dengan Teknologi Modifikasi Cuaca Di Kabupaten Bengkalis Mutia Ananda Perdana; Sigit Sutikno; Ari Sandhyavitri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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The peat fires disaster occurring on the island, particularly in Riau every year, which has at least adversely affected the environment, social and economic conditions of the community. One of the fire suppression effort is Autificial Rainfall (TMC), by sowing NaCl salts in clouds that have the potential for rain. This study piked up three regency areas in Riau Province, such as Bengkalis, Rokan Hilir and Dumai. With the data used is rainfall data from TRMMsatellite and fire distribution point data from fire forest watch. The data obtained were analyzed using FileZilla, GrADS, Command Prompt, and ArcMap V.10.1 software. The resultshows that, Autificial Rainfall (TMC) can accelerate the process of rainfall, thus the number of hotspots can be reduced. So this method can be used as a long-term program in disaster mitigation of peat fires.Keywords : TRMM, TMC, Hotspot

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