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Alfian Qomaruddin
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Universitas Trunojoyo Madura Jl. Raya Telang - Kamal, Bangkalan Kode Pos 69162
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REKAYASA
Published by Universitas Trunojoyo Madura
ISSN : 02169495     EISSN : 25025325     DOI : https://doi.org/10.21107/rekayasa
Core Subject : Science, Agriculture, Engineering,
Agriculture, Biological Sciences & Forestry Computer Science & IT Electrical & Electronics Engineering Engineering Physics
This journal encompasses original research articles, review articles, and short communications, including: Science and Technology, In the the next year publication, Rekayasa will publish in two times issues: April and Oktober.
Arjuna Subject : -
Articles 504 Documents
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Evaluasi Desain Bejana Bertekanan pada Radiator Cooling System Menggunakan Material SPCC-SD Sukarman, Sukarman; Khoirudin, Khoirudin; Murtalim, Murtalim; Mulyadi, Dodi; Rahdiana, Nana
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.9570

Abstract

This study discusses the analysis of a pressure vessel's design in the Radiator Cooling 1000 (RC-1000) system, which operates at a design temperature of 110oC. A pressure vessel is a container of gaseous, solid, or liquid material subjected to internal or external pressure and can withstand various other load variations. The pressure vessel on the RC-1000 system has a outer diameter of 87.8 mm or 3.46 inches and will experience an internal pressure of about 20.84 psi or 143.7 kPa, so it must be designed safely. This research method uses analytical and experimental methods. The analytical method is used to calculate the thickness of the pressure vessel material, the maximum allowable working pressure, and the hydrostatic test calculation. While the experimental method was carried out on the hydrostatic test process, the evaluation was based on the prevailing regulations in the Republic of Indonesia. Using the SPCC-SD material (JIS 3141), it was found that the minimum thickness of this pressure vessel is 0.0453 inches on the shell side and 0.0435 inches on the head/head side. The thickness of the material used on the shell side and head/head is 0.0472 inches in practice. This pressure vessel has passed the hydrostatic test at 232.1 psi or 1600 kPa.
Rancang Bangun Sistem Pemanen Energi di Lantai Menggunakan Modul BQ25570 pada Aplikasi Piezoelectric Energy Harvesting Rifki Abi Setiawan; Syaiful Alam; Umi Murdika; Sumadi Sumadi
Rekayasa Vol 13, No 3: December 2020
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v13i3.8926

Abstract

Energy harvesting is a process whereby energy produced is derived from an external. As for external sources consisting of sunlight, sound, the wind, vibrations, the press, and others. One potential that could be used the style press derived from a footrest man while walking. The device that can be used to harvest energy by using the style press is piezoelectric. Piezoelectric is a material when given style tap hence will generate electricity. But, electricity produced piezoelectric is a signal impulse so it needs a coherent rectifier and devices series of electronic another so that the energy harvested can be stored on a battery, in this research using a module BQ25570. Module BQ25570 is an electronic device in which there are DC-DC converter, charging battery and protection, and super capacitor as media temporary storage. The research was conducted by making a prototype with size 80 cm × 50 cm, use piezoelectric kind of PZT as many as 50 strung together in parallel. Testing conducted by using the style press from the average weight of a human body. The results of tests carried out the power produced at the time of heavy 42 kg is 1,345 mW, 52 kg is 2,251 mW, 67 kg is 4,729 mW, 70 kg is 10,646 mW,  and 82 kg is 17,218 mW.
Peningkatan Produksi Pangan melalui Sistem Integrasi Teknologi Aquaponics-Recirculating Aquaculture System (A-RAS) pada Budidaya Ikan Lele di Desa Kaliuntu Kabupaten Tuban Yogita Ayu Dwi Susanti; Zulkisam Pramudia; Abdul Azis Amin; Lutfi Ni’matus Salamah; Adi Tiya Yanuar; Andi Kurniawan
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.10254

Abstract

Aquaponics-Recirculation Aquaculture System (A-RAS) technology combines recirculation systems in aquaculture with aquaponics technology. A-RAS technology can reduce water use in the aquaculture system and maintain water quality to fulfill aquaculture standards. The application of this system makes pond water that has been used for fish farming can be reused. This research used a descriptive analysis method to analyze A-RAS's application to improve food production through A-RAS in Kaliuntu, Tuban, East Java. This study's results showed that temperature during the study ranged from 27.5-30 °C, pH value ranged from 6.8-8.7, and the dissolved oxygen was around 3.1 mg/l. The content of nitrate, nitrite, and ammonia in the A-RAS technology was around 12.5 mg/l, 0-0.5 mg/l, and 0.003-0.09 mg/l, respectively. The application of A-RAS technology can increase the capacity and quality of the harvest of catfish cultivation. Harvest capacity increased from 100 kg to 180-190 kg / pond, the Food Convention Ratio (FCR) decreased from less than 1.0 to 0.705 and the Survival Rate (SR) increased from less than 75% to more than 95%. The results showed that the application of A-RAS technology could increase food production in Kaliuntu Village, Tuban Regency.
Pengembangan Studi Gasifikasi Tongkol Jagung Untuk Meningkatkan Performa Reaktor Downdraft Dengan Masukan Dua Udara Bertingkat Irawan, Ibnu; Amir, Nizar; Budiarto, Khairil
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.9172

Abstract

Gasification is a technology for converting solid biomass into syngas. Corn cobs biomass is converted into pellets to obtain more homogeneous fuel. The downdraft gasifier type is used to have low tar content. The research was conducted to see the effect of the ratio of air and ER on the reactor temperature and the gas composition of CO, H2 and CH4. For pyrolysis and oxidation zones, air enters with variations (AR.Pir-Ox), namely 0%; 70%; 80%; and 90% in the intake air 14.5; 19.3; and 24.1 Nm3 / hr of E.R 0.3, 0.4, and 0.5. The air intake for each zone is regulated using a tap. Temperature measurement using type K thermocouple. Downdraft reactor performance is obtained by looking at the syngas content in CO, H2, and CH4 meters. The results showed the effect of AR.Pir-Oks with an air input of 24.10 Nm3 /h with E.R 0.5 having the highest temperature of 910oC, in the oxidation zone. This stratified air input plays a role in increasing the temperature along the altitude zone. The increase in the introduced oxygen produces an increase in heat. Syngas production in an air flow of 19.3 Nm3 / hour with a ratio of 90% pyrolysis and oxidation zone (ARPir-Oks), is the reactor produces gas products with a composition of 22.5% CO, 0.96% CH4, and 15.55 H2 %. The results of this test prove that the air entering the pyrolysis zone can provide additional syngas composition.
Kesesuaian Jenis Tanaman Pertanian dengan Kualitas Air Irigasi dari Beberapa Mata Air Karst di Kabupaten Tuban Hari Siswoyo; Mohammad Bisri; Mohammad Taufiq; Vanadani Pranantya
Rekayasa Vol 13, No 3: December 2020
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v13i3.7213

Abstract

This research was conducted with the aim to describe the types of non-paddy agricultural crops that can be cultivated on agricultural land with irrigation water sources from karst springs. This research was conducted at 10 locations of karst springs that are used to irrigate agricultural land in Tuban Regency. Determination of alternative of types of non-rice agricultural crops is done by integrating the irrigation water quality index model, criteria of relative tolerance of crops to salt, and criteria of non-rice agricultural crops that have high economic value. Irrigation water quality index values from karst springs at the study location ranged from 73.99 to 76.23, which is in the range of 70-85 with a low water use restriction. Based on the irrigation water quality index values it can be recommended that water supply for irrigation from karst springs is not carried out on salt sensitive crops. The non-paddy agricultural crop types that can be recommended to be planted in the study location are corn (Zea mays), soybeans (Glycine max), peanuts (Arachis hypogaea), sweet potatoes (Ipomoea batatas), tomatoes (Lycopersicon lycopersicum), eggplants (Solanum melongena), cucumbers (Cucumis sativus), spinach (Spinacia oleracea), melons (Cucumis melo), and watermelons (Citrullus lanatus).
Cultivation of Spirulina platensis and Nannochloropsis oculata for nutrient removal from municipal wastewater Sofiyah, Evi Siti; Suryawan, I Wayan Koko
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.8882

Abstract

Domestic wastewater contains a high average nutrient ammonia-N (NH3-N) and total phosphate (PO43--P). This nutrient content has the potential to cause eutropication in water bodies. To prevent this eutropication, it is necessary to treat domestic wastewater. Currently, processing technology is needed that is useful for improving the quality of processed wastewater and a small amount of byproduct. One of these technologies is processing with a microalgae system, where the algae can be used to become biodiesel. Two types of microalgae that have the potential to produce biodiesel are Spirulina platensis and Nannochloropsis oculate. The cultivation of the two types of microalgae was carried out in the domestic wastewater media of Jakarta City by providing 24-hour lighting with UV-A and UV-B. The specific growth rates of Spirulina platensis and Nannochloropsis oculate were not much different, namely 0.0279 h-1 and 0.0282 h-1. The microalgae Spirulina platensis and Nannochloropsis oculate respectively reduced NH3-N nutrients by 82% and 80%, while PO43-P was 65.2% and 63.7%. The pH value during processing shows in the normal pH range. Total dissolved solids (TDS) in the processing process also decreased in a span of 48 hours.
Pemodelan Sistem Informasi Geografis untuk Pemetaan Kesesuaian Wilayah Perairan dan Pesisir Selat Madura Hidayah, Zainul; Wiyanto, Dwi Budi
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.9987

Abstract

The coastal area of the Madura Strait stretches from Surabaya City to the east to Situbondo Regency and includes the southern part of Madura Island. The aim of this research is to map the suitability of the waters and coastal areas of the Madura Strait using GIS modeling. Mapping of the designation of the waters and coastal areas of the Madura Strait was carried out by overlaying spatial data covering bio-physical parameters including water transparency, pH, water substrate, temperature, salinity, and depth. The designation of water areas is divided into three classes, namely capture fisheries, tourism and conservation purposes. The spatial data used comes from several sources, namely the results of water quality surveys, Landsat 8 satellite imagery, bathymetry data / sea depth and Rupa Bumi Indonesia (RBI) maps at a scale of 1: 25,000. For water quality data comes from the results of a survey by the Marine and Fisheries Service of East Java Province in 2019 at 78 observation points in the waters of the Madura Strait. Water quality parameters used in GIS modeling are pH, salinity, brightness and temperature. The data for each observation point were then interpolated using the Kringing method. Landsat 8 satellite imagery is used to map the condition of the bottom substrate waters. Meanwhile, the depth data was downloaded from GEBCO (General Bathymetric Charts of the Oceans). The result of overlaying thematic maps shows that 37.69% (8586.69 km2) of the area of the Madura Strait is suitable for capture fisheries activities, then 10.28% (2341.02 km2) is suitable for marine tourism areas and 19.06 % (4343.4 km2) suitable for conservation areas. Meanwhile, 32.97% (7511.94 km2) can be used as conservation and tourism areas.
Optimasi Manajemen Rapat di Masa Pandemi Covid-19 Berbasis SeMaR Ahmad Faisol; Joseph Dedy Irawan; Hirarki Ardi Pratama
Rekayasa Vol 13, No 3: December 2020
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v13i3.9011

Abstract

The meeting activity is one of the routine and scheduled activities that is definitely carried out in every institution, as well as the ITN Malang campus. Problems arise when Covid-19 begins to plague in the city of Malang so that teaching and learning activities on campus must be closed and demanded to work from home according to government recommendations. Difficulties that arise are the way to send invitations and record the results of meetings that have not been efficient. So, it is necessary to develop an application that functions to manage meetings in the ITN Malang internal environment named SeMaR (Meeting Management System). This application was developed based on web and Android using design sprint development method. The results of the analysis and testing show that the design of applications that involve potential users can produce an application that is truly in accordance with user requirements. In addition, the use of the SeMaR application to manage meeting activities in the ITN Malang is able to optimize employee performance especially during the Covid-19 pandemic, and meeting management can be more effective and efficient.
Pemetaan Habitat Bentik Pulau Salarangan Menggunakan Metode Object-Based Image Analysis Sari, Citra Arum; Syah, Achmad Fachruddin
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.7996

Abstract

Salarangan Island has supporting ecosystems that are seagrass and coral reefs with a high increase in biological competence. Basic information about the distribution map of benthic habitats on Salarangan Island is not yet available so that technology is needed that can provide information spatially and temporally. Citra Sentinel-2A with Lyzenga transformation in mapping benthic and shallow habitats and studying the distribution of benthic habitats on Salarangan Island, Madura. The image data used is obtained free of charge from the website earthexplorer.usgs.gov and in situ data are used for image data validation. The multiscale / OBIA classification method with the SVM algorithm is used to classify objects in the navigation column. The classification results show as many as 4 benthic habitat classes with object / OBIA classification resulting in overall certification of 69.86%. Based on the classification results, the most contrasting class is the seagrass class (48.76 ha) because it has the most extensive area than the coral class (27.31%), sand (8.94 ha) and seagrass + sand (31.85 ha).
Pertumbuhan Gracilaria sp. yang Dibudidayakan Pada Tambak di Bajo Baru Dompu Ulfa Yulistiana; Ayu Adhita Damayanti; Nunik Cokrowati
Rekayasa Vol 13, No 3: December 2020
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v13i3.9013

Abstract

Gracilaria sp. is a seaweed that produces "agar" and has economic value. Market demand for Gracilaria sp. is quite high but has not yet been fulfilled. Gracilaria sp. has not been widely cultivated in the waters of West Nusa Tenggara Province, including Dompu. If the level of production of Gracilaria sp. high, it can improve the community's economy. So it is necessary to increase cultivation to increase the production of Gracilaria sp. This research aims to study the growth of Gracilaria sp. cultivated with different initial seed weight treatment. The research was conducted in the Bajo Baru pond, Dompu, West Nusa Tenggara. This study used a completely randomized design method consisting of five treatments with three repetitions. The treatments were: treatment A; Gracilaria sp. with initial seed weight of 100 gr (control); treatment B: Gracilaria sp. with an initial seed weight of 375 g; treatment C: Gracilaria sp. with an initial seed weight of 425 g; treatment D: Gracilaria sp. with initial seed weight 475 g; treatment E: Gracilaria sp. with initial seed weight of 575 g. The parameters observed were absolute and daily growth, agar yield, and water quality. Cultivation and parameter observation was carried out for 30 days. Data analysis using ANOVA (Analysis of Variance) and graphs with descriptive analysis. The results showed that the initial seed weight of Gracillaria sp had no significant effect on absolute and daily growth. The best growth was obtained in treatment E (575 g) which gave 740 g absolute growth and 0.052 g daily growth. On the other hand, the yield value for agar shows a decreasing trend when using seeds with a higher initial weight. The yield value for the highest order was 17.56%.

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