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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
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Potensi Nilai Ekonomis Dari Penanganan Sampah Elektrik Dan Peralatan Elektronik Studi Kasus Televisi Cathode Ray Tube Fikri, Aulia; Arief, Dodi Sofyan
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The electronics industry is the fastest growing manufacturing industry in the world, as well as the increasing amount of electrical waste and electronic equipment that has become e-waste. This study refers to the potential economic value of handling e-waste from used television's cathode ray tube, then proceeded to handle using the 3R principle (reduce, reuse and recycle) from disassembling the cathode ray tube, separation of reusable components, and the usage of recycling technology to recycle non-usable components as raw materials for new products. From the utilization stage of e-waste, it can generate economic value from dismantling and recycling process, before going through the process of disassembling the used television's CRT which valued by used goods collectors for Rp.20.000 - Rp. 40.000,- unit. After they had gone through the process of recycling and utilization of electronic components that can be resold, it obtained an increase in economic value 54.7% of the price to buy the television’s CRT waste from used goods collectors, thereby indicating a significant increase in economic value through the recycling of television's CRT so that the e-waste processing can minimize e-waste, and enables a new business field that is quite profitable.Keywords : Cathode Ray Tube, E-waste, Reduce, Recycle, Reuse.
Penentuan Dosis Terbaik Koagulan Aluminium Sulfat Dalam Mengolah Limbah Cair Laboratorium Dengan Proses Koagulasi Dan Flokulasi Ferizal Nuurfath; Shinta Elystia; Edward HS
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 6 (2019): Edisi 2 Juli s/d Desember 2019
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The wastewater of Fundamental Chemical Laboratory contained very high concentration of TSS and TDS. Therefore, wastewater treatment is needed before discharge to the environment. Coagulation process is able to destablilize the particles in the wastewater to form a floc, formed floc will unite and become a larger floc through the flocculation process so it can settle. This research aim to determine the best dose of aluminium sulfate in reducing concentration of TSS and TDS. Variation of the aluminium sulfate coagulant dose is 1, 2, 3, and 4 gr/L. Based on the result, the best dose in reducing concentration of TSS and TDS was 3 gr/L with removal efficiency of TSS 78,61% and TDS 62,02%.Keywords : Aluminium Sulfate, Coagulation, Flocculation, TSS, TDS, Laboratory Watewater.
Evaluasi Sistem Proteksi Petir Pada Tower Pt. Sampoerna Telekomunikasi Indonesia (Ceria) Pekanbaru Febriani Syafran Putri; Eddy Hamdani
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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Abstract

Lightning occurs because there is a difference of potential between the cloud and the earth or by other clouds. Lightning caused a lot of harm to people and damage to the equipment. Some places with the high rate of lightning strikes (frequency and intensity) of being the first priority in the use of the installation of lightning protection. Tropical countries like Indonesia generally have a high lightning day each year, including in the area of Pekanbaru. This paper proposes to evaluate lightning protection system in PT. Sampoerna Telekomunikasi Indonesia (Ceria) Pekanbaru. Improvement of lightning protection system is made through a Rolling Sphere Method. The result of the data shows that the lightning protection system in PT. Sampoerna Telekomunikasi Indonesia (Ceria) Pekanbaru was already capable of protecting the Base Station Transceiver (BTS) from lightning strikes. This results is proven to indicate that lightning protect is improved.Keywords: lightning protection system, Rolling Sphere Method, lightning protection system in PT. Sampoerna Telekomunikasi Indonesia (Ceria) Pekanbaru
Pengaruh Massa Dan Ukuran Partikel Adsorben Daun Nanas Terhadap Efisiensi Penyisihan Fe Pada Air Gambut reyra, Anilza Silvi; Daud, Syarfi; Yenti, Silvia Reni
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Peat water is surface water are blackish brown and metals Fe which requires effective and efficient processing to be worthy for use by the public. Various types of adsorbents continue to be developed, one of which is the pineapple leaf adsorbent. The purpose of this study was to determine metal removal efficiency of Fe in the peat water, calculating the adsorption capacity and determine the appropriate type of isotherm. Fixed variables used in this study is the stirring speed of 120 rpm and a contact time of 90 minutes. For independent variables used consisted of adsorbent mass variation of 1,5; 2; 2,5; 3 g and a particle size variation 80, 100 and 120 mesh. Removal efficiency of Fe metal concentrations higher 76,14% by mass of adsorbent 3 g with a particle size of 120 mesh. Metal adsorption capacity of Fe achieved the highest on the mass of 1,5 grams with a particle size of 120 mesh amounted to 0,092 mg Fe / g . Types of adsorption isotherms corresponding to Fe by pineapple leaf adsorbents is Freundlich isotherm with R2 values of 0,927 for Fe.Keywords : Adsorption, Adsorbent, Peat Water, pineapple leaf
Analisis Kinerja Persimpangan Kondisi Eksisting (Studi Kasus: Persimpangan Jalan HR. Soebrantas- Jalan Kubang Raya-Jalan Garuda Sakti Pekanbaru) Prasetia, Bayu Reski; Sandhyavitri, Ari; Djuniati, Sri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
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Abstract

A meeting of two or more roads may rise conflict of traffic flow use defined or an intersection point. The intersection of Jl. HR. Soebrantas–Jl. Kubang Raya-Jl. Garuda Sakti Pekanbaru, was selected as a core study in this paper. This intersection to cause trafffic congestion delays and traffic jams during peak hours. This study used the method of Indonesian Highway Capacity Manual 1997. Data obtained by conducting surveys on traffic volume. The researched was conducted for three days; Friday (13/10/2017), Saturday (4/11/2017), and Monday (6/11/2017). From the survey results and the calculation of peak hour of the traffic flow occurred on Friday 17:15 to 18:15 pm with the value of Q = 4058,6 smp/hour, C = 4217,696 smp/hour, DS = 0,962, DTI = 13,432 det/smp, DTMA = 9,537 det/smp, DTMI = 21,272 det/smp, DG = 4,02 det/smp, D = 17,452, QP% = 37,1-73,3%. Since DS value is greater than the requirement of Indonesian Highway Capacity Manual 1997 which is 0.85, it is necessary to plan alternative solutions to improve the performance of the intersection.Keywords: Jl. HR. Soebrantas-Jl. Kubang Raya-Jl. Garuda Sakti Pekanbaru, Q (Traffic flow), C (Capacity), DS (Degree of saturation).
Analisis Kinerja Sistem Pengereman Pada Mobil Hemat Energi Asykar Urban Gasoline Tussalam, Al Fitra; Syafri, Syafri
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Abstract

Asykar Urban Gasoline is a car made by students of Riau University within the standard of Kontes Mobil Hemat Energi (KMHE). The car consist of multiple system to run properly such as steering system, electrical system, engine system, transmission system and braking system. This research aim to analyze the braking system, due to its vital role and also effect the fuel consumption of the car. It is done on 2 types of roads: asphalt and concrete (dry and wet) with 3 speed variation of 25 km/h, 35 km/h, 45 km/h. The result show that the highest braking distance on wet asphalt within 45 km/h is 7.96 m theoretically and 7.5 m on field with 5.7% error. Next, braking distance with the biggest range among all data is on the wet asphalt within 35 km/h velocity and braking distance of 4.83 m theoretically and 4.3 m on field with 9.93% error. It means the amount of range in general is not really big which not exceeding 10%. Results also show the stabilization of the car tendto over steer regardless on theoretical calculation or in actual test. Keywords: Brake, Braking Distance, Car Direction Stability
Pemodelan Dan Simulasi Transformator Pada Kondisi Open-Circuit Pada Salah Satu Fasanya Silitonga, Horin Relevando; Anto, Budhi
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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The transformer is widely used for increasing and decreasing the voltage of the power system. Loading on the transformer impact the reliability of the transformer. Sometimes an interruption in the transformer that causes malfunction of transformers, which are open-circuit. This paper describes how the condition occurs in the transformer during an open-circuit. Modeling conducted to observe the characteristics of the transformer. Modeling done by modeling the iron core construction purposes 400kVA step-down transformer 20KV / 400V by using software MATLAB / Simulink R2015A. The results of this paper to show the characteristics of the transformer which indicates that there is an unbalance between voltage and current on the primary side and secondary on the transformer.Keywords : three phase transformer, open-circuit, fault, modeling, MATLAB/Simulink
Pengujian Pompa Spiral Dengan Kincir Air Pada Aliran Irigasi Marwanto Marwanto; Asral Asral
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
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Irrigation water flow can be utilized by installing a tool that is a waterwheel. Now it has been developed in the form of a water wheel pump, where this water pump serves to pump water without using electrical energy but with the help of irrigation flow. The aim of this research was know the characteristics of spiral pump and efficiency of spiral pump with waterwheel. The method used an experimental research that was test directly in the field. The waterwheel used a type of undershot flat blade 2 m diameter with 18 pieces of blade. The flexible hose was 38.1 mm diameter with a total coil of 4.55 windings, and an input diameter of 76.2 mm. The highest flow rate was 0.29 m3/s, the highest spiral pump discharge output was 0.27 l/s with a spiral pump efficiency of 1.54 % and the head was 3.38 m. The lowest flow rate was 0.11 m3/s, the lowest spiral pump discharge output was 0.15 l/s with a spiral pump efficiency of 0.81% and the head was 1.21 m. Therefore, the irrigation flow is influence of the rotation of shaft, the discharge of pump, efficiency and head spiral pump.Keyword: spiral pump, flow rate, head, efficiency.
TINJAUAN KUAT TEKAN BATA RINGAN MENGGUNAKAN BAHAN TAMBAH FOAMING AGENT Arita, Deri; Kurniawandy, Alex; Taufik, Hendra
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 1 (2017): Wisuda Februari Tahun 2017
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Abstract

Lightweight bricks could be used as the substitute of conventional bricks for building wall materials. Lightweight brick has a weights beetween 600 to 1800 kg/m3. In this research, lightweight bricks were made by trial and errors made by adding combination of 0.3%, 0.6%, 0.9%, 1.2% and 1.5% of foam agent by cellular lighweight concrete (CLC) method. The optimum compresive strength was gain at 0.9% of foam agent. CLC lightweight brick is the type of bricks which is constructed by adding air bubbles/foam agent to mortar mixture. It is necessary for the air bubbles to retain their shapes during the curing process of the mortar without triggering chemical reaction. An airlock was in a mixture of mortar structure of the cells that produce material, which contains the cavity the air with the size of the between 0,1 to 1,0 mm thick and spread uneven so that makes the nature of concrete better to prevent heat and more voice The curing process was performed by storing the samples indoor, in which the room temperatur varies over time. The sample size was 60x20x7.5 cm, made to investigate the impact of foaming agent to the compressive strength of the lightweight bricks. The experiment method was carried out based on SNI 03-6825-2002. As a result, the compressive strength was 0.49 MPa at 7 days, 0.23 MPa at 14 days, and 0.67 MPa at 28 days. In addition, according to the furnace tests, the lightweight bricks resist for heat temperature of 500ºC. Also, The acoustic test results also shows that the lightweight bricks absorb sound by 3%.Keywords : brick light, foam agent, strong press, acoustic monitoring, furnace
Pengaruh Penyekatan Kanal Terhadap Pembasahan Lahan Gambut (Studi Kasus: Desa Dompas, Kabupaten Bengkalis) Muhammad Randy Alfath; Rinaldi Rinaldi; Sigit Sutikno
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 7 (2020): Edisi 1 Januari s/d Juni 2020
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Abstract

Peatland fire often occur in Indonesia. One of the causes was because of the ground water level (GWL) decreased due to many canals. Some efforts that can be done are by rehabilitating peat’s ecosystems. The Peat Restoration Agency (BRG) has implemented a peat restoration effort, such as rewetting activities (rewetting of peatlands) by building canal blocks. Dompas village is a peat area and has the potential to experience a fire during the dry season. The installation of canals were expected to increase the peat water level in accordance with the provisions of less or equal to 40 cm from the ground surface. In this study the analysis of the impact of canal blocking was using Deep well media to determine changes in peat water level due to canal blocking. Four deep wells were installed at 4 transects, and each transect had 4 deep wells installed with the provisions of 1 transect downstream and 3 transects upstream. The analysis was carried out before and after the canal was blocked to find out how much influence the canal blocking had on wetting the peat land. The installation of canals in this study was able to raise the GWL by 10 cm to 21 cm with a wetting distance further than 75 meters from the canal. Keywords : peatland fires,rewetting, canal blocking, deep well.

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