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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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Sintesis Komposit Magnetit/Hidroksiapatit Menggunakan Metode Hidrotermal Dengan Variasi Waktu Dan Konsentrasi FeCl3 Bima Wandika Putra; Ahmad Fadli; Drastinawati Drastinawati
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

Magnetite / hydroxyapatite composite is a material that can be used as a drug carrier. The purpose of this study was analyzing variations in time and FeCl3 concentration on the characteristics of composites produced using the hydrothermal method. A total of 0.3248 gr FeCl3.6H2O (2 mmol or 0.05 M), sodium citrate 1.1764 gr (4 mmol or 0.10 M), and 0.3604 gr urea (6 mmol or 0.15 M) dissolved in 40 ml of distilled water, then 0.1 g of PEG (7.5 g/L) is added while stirring until it runs out, then added Hydroxyapatite powder as much as 30% by weight, stirring until it dissolves. After being put in a Teflon container. The container was put into an oven and set at 210 ° C. The reaction times used in this study were 5, 7, 9, 12 and 15 hours. Furthermore, it was carried out with the help of an external magnetic field (permanent magnet) so that the process can be carried out quickly and more effectively. Furthermore, it was settled by completion. The sample is then dried at oven temperature 120°C for 12 hours. The resulting composite powder was characterized by XRD, BET, TEM, and VSM. Increasing hydrothermal time to 15 hours at a concentration of 0.15 M, increasing the surface area of particles from 64.48 m2/gr to 67.41 m2 /gr. Where as the variation of higher FeCl3 concentration from 0.05 M to 0.15 M is the large size of magnetite crystals 18.41 nm to 22.77 nm. Variation of higher FeCl3 concentration enlarged the surface area of particles from 48.21 m2/gr to 67.41 m2/gr, increased magnetic saturation value from 13.24 emu / gr to 17.27 emu/gr, with the shape of the particles produced round shape measuring 15 nm.Keywords: composite, drug delivery, hydrothermal, hydroxyapatite, magnetite
Desain Dan Simulasi Maximum Power Point Tracking (Mppt) Perturb And Observe (P&O) Dengan Kendali Arduino Untuk Pembangkit Listrik Tenaga Angin Kecepatan Rendah Melaluca Leuca Dendron Kadarnis; Amir Hamzah
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Wind power plants are power plants that compose wind energy to produce electricity. With a Permanent Magnet synchronous generator or better known as PMSG (Permanent Magnet Synchronous Generator) is a generator by using a permanent magnet in the stator so that it can excite itself. MPPT P & O (Maximum Perturb and Observe Power Point Tracking) is implemented using a buck-boost converter to find the maximum power value used to charge 28V batteries. The design and analysis of buck boost converter modeling has been made and simulated using Proteus pro 8.6 by using Arduino as a duty-cycle controller. The results of the MPPT P & O algorithm that is inserted into Arduino are able to vary the width of the duty cycles to control battery loading while maintaining a safe limit on battery charging voltage.Key word: PMSG, MPPT P&O, Buck-Boost Converter, Arduino, Proteus Profesional 8.6
Pembuatan Material Wood Plastic Composite Berbasis Limbah Pelepah Sawit Menggunakan Maleated Natural Rubber (Mnr) Sebagai Kompatibilizer Akbar, Anif Aulia; Yelmida, Yelmida; Bahruddin, Bahruddin
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Natural rubber (NR) is one of the largest agricultural commodities in the world. But this potential is not balanced with satisfactory productivity. The purpose of this research was to study the effect of palm frond powder (SPS) / polyethylene (PE) ratio on physical properties, use Maleated Natural Rubber (MNR) as a compilizer and study the effect of MNR compatibility composition on the physical, mechanical properties of Wood Plastic Composite (WPC) palm fronds based. WPC samples were prepared by melted mixing method between palm fronds, polyethylene, MNR, and Minarex fibers at a temperature of 170oC and using the Internal Mixer. The size of the palm frond fiber used is 60-80 mesh. While the ratios of the weight ratio of SPS / PE are 60/40 and 70/30 and the addition of MNR is 0%, 1%, 3%, 5%, 7% and 9%. The test method includes mechanical properties which is tensile strength test while physical properties test includes density, water absorption, and thick development. The test results show that the best mechanical properties are produced at the SPS / PE (60/40) ratio, MNR (3%), with a tensile strength value of 23.164 MPa. While in physical properties, the best absorption is 0.477% in the ratio (60/40) with MNR (3%), the best thick development is 0.167% in the ratio (60/40) with MNR (3%) , and the highest density is 0.923% in the ratio (60/40) and MNR (5%). Keywords: Compatibilizer, maleated natural rubber, palm frond fiber, wood plastic composite
Rancang Bangun Rangka Sun Tracking Pada Panel Surya Dinamik Mafiqi, Arif; G, Yogie Rinaldy; Prayitno, Adhy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

This study aims to design a Sun Tracking frame in dynamic solar panels. The methodology of this research has 4 main steps: (1) Literature Study, (2) Design Concepts, (3) Concept Selection, (4) Frame Making. in this study a Sun Tracking machine designed for solar cells was designed to follow the movement of the sun. The design stages consist of needs analysis, preparation of product technical specifications, design of product concepts to produce alternative product concepts which are then selected concepts to be made. From the form of the concept that will be made, static analysis is carried out on the mechanical components of the Sun Tracking engine. Static analysis is done by means of manual calculation and elemental analysis. Based on the results of the static analysis, the results of the stresses were 8.381 MPa on stem 1, 8.769 MPa on rod 2, 0.5378 MPa on rod 3 and 0.6448 MPa on rod 4. Deformation that occurred was 0.02783 mm at stem 1, 0.03107 mm on stem 2, 0.0003228 mm on stem 3 and 0.0002346 mm on stem 4. Keywords: Sun Tracking, solar cell
Pengaruh Penambahan Abu Dasar (Bottom Ash) Sebagai Bahan Pengganti Pasir Pada Paving Block Rezky Yusman Efendy; Zulfikar Djauhari; Ermiyati Ermiyati
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

This research aims to study the effect of bottom ash as substitute of sand in paving block and to classify each percentage of substitution according to SNI 03-0691-1906 Bata Beton (Paving Block) class specification. The mixture of cement and sand used in this study was 1 : 3. The variation of substitution started from 0%, 10%, 20%, 30%, 40% of sand weight. Tests performed on paving block include compressive strength, water absorption, Na2SO4 immersion test. The results shown by this research that water absorption test at substitution 0%, 10%, 20%, 30%, 40%, were 5.76%, 6%, 5.83%, 7.16%, 7.49%. According to SNI 030691-1906 “Bata Beton” (Paving Block) to water absorption test results, 0%, 10%, 20%, were categorized as B quality paving block, and 30%, 40% were categorized into C quality paving block. The results shown by this research that compressive strength test at substitution 0%, 10%, 20%, 30%, 40% were 31.80 MPa, 27.30 MPa, 29.61 MPa, 19.97 MPa, 16.41MPa. According to SNI 03-0691-1906 Bata Beton (Paving Block) to compressive strength test results, 0%, 10%, 20%, were categorized as B quality paving block, and 30%, 40%, were categorized into C quality paving block. Keywords: Paving Block, Bottom Ash, Water Absorption, Natrium Sulfate, and Compresive Strength
Pengaruh Ekstrak Daun Nanas (Ananas comousus) Sebagai Green Inhibitor Terhadap Laju Korosi Baja Karbon Dalam Media Asam Klorida Fauzia Mulyana; Komalasari Komalasari; Syelvia Putri Utami
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Corrosion is the deterioration of metals by chemical attack or interaction with its environment. The corrosion process is a natural phenomenon that cannot be stopped but can be prevented in many ways. The use of inhibitor is the best way to prevent metal from corrosion. Pineapple leaves are a green inhibitor that can be used to reduce the corrosion rate. This research aims to determine the concentration of tannin in pineapple leaves extract, the effect of variations in the concentration of corrosive media, the concentration of the inhibitor, the duration immersion against corrosion rate and inhibition efficiency of pineapple leaves extract. The soxhletation method was used to pineapple leaves extract with a ratio of solvent volume ethanol:aquadest 1:4. The test method carried out in this research is the weight loss method by using a variation of the concentration of the pineapple leaves extract (0, 0.5, 1.0 and 1.5 g/L) and the duration immersion (8, 16, 24, and 32 hours) in the concentrated hydrochloric acid solution 0.5M. The lowest corrosion rate in HCl solution 0.5M using inhibitor 1.5 g/L with duration of immersion 32 hours resulted 60.639 mpy and highest corrosion rate in HCl solution 1.0M without the addition of inhibitors with duration of immersion 24 hours resulted 530,659 mpy. It can be concluded that specimen with added higher the concentration of inhibitor in the lower concentration corrosive media yielded the corrosion rate to become lower in long immersion time.   Keywords: corrosion rate, inhibitor, pineapple leaves
Kajian Pemanenan Air Hujan Skala Individual Untuk Pemenuhan Air Baku Wilayah Pesisir Wilayah Kajian : Desa Tanah Merah, Kecamatan Tanah Merah, Kabupaten Indragiri Hilir Triliani, Ana Aulia; Suprayogi, Imam; Sasmita, Aryo
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Indragiri Hilir Regency is a condition of the area which is dominated by salt water, the water quality is very inadequate in terms of quantitative and qualitative hydrology due to swamp environmental conditions. Therefore the need for other alternatives to meet raw water needs by utilizing Rainwater Harvesting technology. In this study conducted the study in Tanah Merah Village, Tanah Merah District, Indragiri Hilir Regency. To find out the large contribution of rainwater harvesting, design designs, and budget plans that are carried out calculation and analysis of data. Supported by the Raincycle Standard v2.0 program based on the falling raindrops (roof's drip) which is the catchment area and water requirements based on the number of family members of each type of house. And the results obtained after the analysis of data for rainwater catchment areas, namely with an area of 208 m², 156 m², and 126 m², the percentage of rainwater donations fulfilled by 3 tanks is 82% with a planned budget of Rp 14,358,000.00 while for the rainwater catchment area, which is 80 m² in size, and 49 m² of the percentage of rainwater donation that is fulfilled by 2 tanks is 72% with a budget plan that is Rp. 10,332,000.00. And in terms of quality parameters that exceed the quality standard, namely detergent, to reduce the levels, namely by filtering with filters from media activated carbon, sand, and silica.   Keywords: Rainwater Harvesting, Indragiri Hilir Regency, Raw Water
Pengaruh Variasi Penambahan Pome Terhadap Rasio C/N Pada Pengomposan Tks Sisa Media Tanam Jamur Merang Naomi Ebinasari BR Sembiring; Elvi Yenie; David Andrio
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Composting is one of the best methods for handling empty fruit bunch (EFB) waste. This research aims to learn effect variation of additions Palm Oil Mill Effluent (POME) in composting process of EFB spent paddy straw mushroom (Volvariella volvacea) toward C/N ratio. Palm Oil Mill Effluent (POME) was added gradually (in day 0, 7th, and 14th) and variation of substrate mixture (EFB spent paddy straw mushroom : POME) are 1:0; 1:1; 1:2; and 1:3. The result shows the composting process finish in the day 7th (faster than research estimate, with 1 time POME addition) and the best variation of substrate mixture is (D) (1:3). The mature compost has C/N ratio 13,07. Key words : EFB spent paddy straw mushroom, C/N ratio, Composting, POME
The Development Of The Cultural Heritage Site Of Huis Van Behauring As Heritage Tourism Destination In Bengkalis Muhammad Ikrom; Wahyu Hidayat; Pedia Aldy
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 1 Januari s/d Juni 2019
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Abstract

Bengkalis city is the center of Bengkalis District government. In the Dutch colonial era, Bengkalis had become the residency of eastern Sumatra so that there were many colonial remains in the city. One of them is the Huis Van Behauring cultural heritage site which is a prison building that was once a place of exiled kings and leaders who opposed the Dutch government at that time. The research methods were field observations, literature reviews, and documentations. The development of the cultural heritage tourism and colonial architectural was emphasized on the area organization of the site and the appearance of buildings that showed the characteristics of colonial architectural buildings. The development location is on Jalan Pahlawan, Bengkalis with width 3,5 hectares. The concept used was taken from the title Bengkalis people give to Huis Van Behauring building, which is chain. The result of this study is the development of the Huis Van Behauring cultural heritage site used as a new historical tourist attraction in Bengkalis by applying the heritage tourism elements and the colonial architectural style. In addition, the development of this site is to preserve and revive the Huis Van Behauring site.Keywords: Colonial Architectural, Bengkalis, Heritage Tourism, Cultural Heritage, Huis Van Behauring,
Stabilisasi Tanah Plastisitas Tinggi Menggunakan Semen Dan Difa Soil Stabilizer Ronny Tigor Sitanggang; Muhamad Yusa; Ferry Fatnanta
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

High plasticity is poor physical and mechanical properties of the soil, so it is deemed not to meet a certain technical properties for bearing a construction. It is usually has a low bearing capacity, high compressibility and high swelling and shrinkage behaviour, where it needs to be stabilized. This study attempted to stabilize high plasticity soils using cement and Difa Soil Stabilizer as addictive material. This study investigated effect of Difa Soil Stabilizer to physical and mechanical properties (UCS test). Difa Soil Stabilizer and cement varied from 0.6%, 0.8%, 1.0%, and 3% and 5% of soil dry weight respectively. UCS test was conducted at optimum water content after 0, 7, and 14 days curing. The results show that Difa Soil Stabilizer could not work optimally without cement. Curing days for soil, cement and Difa Soil Stabilizer increase UCS value. Maximum UCS value (878.7 kPa) was obtained at 14 days of curing for mixture of soil + 5% cement. UCS value for mixture of soil + 3% cement has a lower UCS value (344.4 kPa). For soil, cement and Difa Soil Stabilizer mix, highest UCS value was obtained at 0.6% Difa Soil Stabilizer i.e 720,4 kPa at 14 days of curing with 18.012 % lower than maximum UCS value. Keywords : UCS, Difa Soil Stabilizer, high plasticity, cement, stabilization

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