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Tri Susilawati
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Hexagon
Published by Universitas Teknologi Sumbawa
ISSN : 27213714     EISSN : 27213188     DOI : https://doi.org/10.36761/hexagon
Core Subject : Engineering,
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering
Hexagon Jurnal Teknik dan Sains, Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa hadir sebagai salah satu wadah yang menyajikan pemikiran hasil penelitian dalam bidang keilmuan teknik dan sains. Dimana, Jurnal yang di Kelola oleh Fakultas Teknologi Lingkungan dan Mineral ini memiliki ruang lingkup keilmuan dari teknik dan sains. Selain keilmuan Teknik, Jurnal Hexagon juga menyajikan hasil penelitian dalam ruang lingkup untuk bidang sains. Untuk waktu publikasi, Hexagon Jurnal Teknik dan Sains terbit 2 (dua) kali dalam setahun pada Semester Ganjil di bulan Januari dan pada Semester Genap di bulan Juli. Dan memiliki ISSN Cetak : 2721-3714 dan ISSN Online : 2721-3188
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 152 Documents
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SISTEM DOSING PUMP BERBASIS ARDUINO UNO R3 UNTUK MENAMBAH NUTRISI TANAMAN HIDROPONIK: SISTEM DOSING PUMP BERBASIS ARDUINO UNO R3 UNTUK MENAMBAH NUTRISI TANAMAN HIDROPONIK Hidayatullah, Muhammad; Khairil; Etiana, Eka; Andriani, Titi; Ali Topan, Paris
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4093

Abstract

Currently, many hydroponic plants are still provided with nutrition manually. Therefore, a device was created that is capable of providing nutrition automatically using a dosing pump and Arduino Uno R3. This research aims to find out how to add nutrient solutions automatically. The method used is an experimental method which includes: the tool design stage, testing stage, and data collection stage. To design the tool, all components are assembled into one with Arduino Uno. The results of the dosing pump test with a time variation of 1-30 seconds produced an increasing amount of nutrient solution and the amount of nutrient for each increase in time was around 0.3-0.4 ml. This tool will turn on if the input value is >2.7 and the PWM (Pulse Width Modulation) used is 255. It is hoped that this tool will be useful for the community as a reference when cultivating organic plants in the future.
PENGARUH VARIASI VOLUME LIMBAH SERBUK KAYU MAHONI TERHADAP KEKUATAN FISIK, MEKANIK DAN MIKROSTRUKTUR KOMPOSIT PARTIKEL Desiasni, Rita; Widyawati, Fauzi; Nabila, Maitsa Fikri; Saiful, Muhammad
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4143

Abstract

The strength of the mechanical and physical properties of particle composite materials is influenced by the volume fraction of the powder and matrix. The pretreatment was carried out by soaking 2% NaOH for 1 hour. The results of the MOE treatment mechanical highest test value at the powder volume fraction of 30:70%, which was 6145.51 kgf/cm² and the highest MOR test value at the 30:70% volume fraction, which was 167.38 kgf/cm². Meanwhile, the highest non-treatment MOE value at the 30:70% powder volume fraction was 5540.9 kgf/cm² and the highest MOR test value at the 30:70% volume fraction was 156.6 kgf/cm². The results of the physical properties test were the highest density at the 30:70% powder volume fraction of 0.87 gr/cm³ and the highest density at the 30:70% non-treatment powder volume fraction of 0.78 gr/cm³. The results of the MOE mechanical test do not meet the JIS A 5908-2003 standard while the MOR mechanical test and physical test have met the JIS A 5908- 2003 standard. The results of microstructure testing showed that at a fraction of powder volume of 30:70% it was seen that the particles were coarser which blended perfectly with the matrix.
RANCANG BANGUN PENGENDALI SUHU DAN KELEMBABAN RUNGAN BUDIDAYA JAMUR TIRAM MENGGUNAKAN ESP32 DAN SENSOR SHT22 Topan, Paris; Indra Darmawan; Titi Andriani; Arjuna Satriawansyah
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4151

Abstract

Oyster mushrooms are an agricultural commodity whose cultivation process still has obstacles that must be resolved, namely, the difficulty of cultivators in regulating the temperature and humidity in the oyster mushroom cultivation room. Usually oyster mushroom cultivators will water the cultivation room at certain times without considering the temperature and humidity conditions. so it can cause the room to have abnormal humidity values. To overcome this problem, a device was created that can water automatically by considering the temperature and humidity conditions in the cultivation room. This device consists of an ESP32 microcontroller, an SHT22 sensor which can read room temperature and humidity, a sprayer to spray water, and a fan whose job is to maintain the room temperature and humidity. The ESP32 device will be programmed to control two Single State Relays which function to turn the sprayer and fan on and off, based on temperature and humidity readings from the SHT22 sensor. The results of the research show that the designed device is able to maintain ideal temperature and humidity conditions for oyster mushrooms to grow, namely: The temperature value is in the range of 30°C - 35°C and humidity is between 70% - 100%.
ENVIRONMENTAL REVIEW INSTALASI PENGOLAHAN AIR LIMBAH (IPAL) KOMUNAL DI INDONESIA: STUDI KASUS IPAL KOMUNAL DI KABUPATEN SLEMAN YOGYAKARTA marendra, fajar; Saputri, Dwi; Prasetya, Agus; Yuliansyah, Ahmad Tawfiequrrahman
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4157

Abstract

he communal domestic wastewater treatment plant (WWTP) in Distrik of Sleman, Yogyakarta built in 2006 and the latest in 2018. In this study, the assessment of six environmental aspects, quality of effluent, geographic location, land topography, receiving water bodies, floods hazard, and soil types, was carried out in the communal WWTP in the District of Sleman, Yogyakarta. Data collection techniques using Stratified Random Sampling combine with interview technic and field surveys, then an assessment is carried out based on the Likert scale. The results showed that the quality of effluent aspect gets an average score of 2.57, soil types (2.60), geographic location (2.83), land topography (3.13), receiving water bodies (3.17), and floods hazard (3.63). The quality of effluent aspect can improve by integrated with fixed bed process or electrochemical process. Overall, the environmental category of WWTP in the District of Sleman, Yogyakarta, gets an average score of 2.99 from the maximum value of 4 (quite a good).
RANCANG BANGUN CONTROLLER MOTOR DC 36V PADA KENDARAAN LISTRIK NGEBUTS DALAM AJANG SHELL ECO-MARATHON ASIA PASIFIC AND THE MIDDLE EAST 2023 : RANCANG BANGUN CONTROLLER MOTOR DC 36V PADA KENDARAAN LISTRIK NGEBUTS DALAM AJANG SHELL ECO-MARATHON ASIA PASIFIC AND THE MIDDLE EAST 2023 Hidayatullah, Muhammad; Ahmad Hasibuan, Thohar; Aulia, Masyitah
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4162

Abstract

Shell Eco-Marathon is an activity organized by the Shell company. This activity aims to increase the creativity and innovativeness of the participants in finding innovations in fuel use or fuel substitute innovations. Innovation in this activity can help realize the spirit of a future energy leader, change maker, perseverance, collaboration, innovation, and purpose to help create a cleaner future. NgebUTS is a Prototype Electric vehicle that is energy-efficient for the Shell Eco-Marathon, uses a Lithium Battery, and is driven by a DC motor. It is hoped that NgebUTS will become an innovative energy-saving vehicle ready to be used for the energy transition to renewable energy.
PENGARUH PENAMBAHAN LIMBAH ABU CANGKANG KEMIRI DAN ABU BONGGOL JAGUNG TERHADAP UJI KUAT TEKAN PADA PAVING BLOCK Dwi Nata, Oktavian; Dharmawansyah, Dedy
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4255

Abstract

Paving Block is a mixed composition consisting of cement, sand and water as a binding agent. In this research, we carried out an innovation in making paving blocks by utilizing waste candlenut shell ash and corncob ash with a substitute mixture of 25%, 5% candlenut shell ash and 15%, 5% corncob ash at CV Maras Beton Sumbawa. The aim of this research is to determine the compressive strength of paving blocks, visual defects in paving blocks and to determine the water absorption capacity of paving blocks with a test age of 28 days. Based on research results, the highest compressive strength of paving blocks was a mixture of 15% candlenut shell ash, 5% corncob ash with a compressive strength value of 20.41MPa. Meanwhile, the lowest strength value was found in a mixture of 25% candlenut shell ash and 15% corncob ash with a compressive strength value of 12.88 Mpa. Meanwhile, the maximum water absorption value was in a mixture of 15% candlenut shell ash and 15% corncob ash with a water absorption value of 6.67%. Meanwhile, the lowest water absorption value was a mixture of 15% candlenut shell ash and 5% corncob ash with a water absorption value of 10%. Meanwhile, visually defects in paving blocks are found in a mixture of 25% candlenut shell ash and 15% corncob ash, there are porosity defects or cavities on the surface of the paving block, resulting in a decrease in the compressive strength value. All variations of mixed substitutes meet the compressive strength standards and water absorption standards for paving blocks in accordance with standards (SNI 0691 – 1996) but only vary in the values ??of water absorption capacity and compressive strength.
MITIGASI RISIKO RANTAI PASOK BERAS MENGGUNAKAN METOD HOUSE OF RISK (HOR) (STUDI KASUS UD. AL BAROKAH, BOAK) ulfa, ulfaturrahmi; Nugrahani, Indar
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4425

Abstract

With the high rice production in West Nusa Tenggara province, where Sumbawa is the second largest rice production district, this has become one of the triggers for several entrepreneurs to set up rice milling factories, one of which is UD. Al Barokah. As a business that is still developing, UD. Al Barokah is required to be able to compete with other businesses in the same field. To be able to compete with other companies, UD. Al Barokah needs to increase the supply of rice with better results among rice production business managers using a supply chain approach. Based on the results of interviews with the owner of UD. Al Barokah, problems were found in the supply chain system, both internal and external, based on these problems, it was necessary to mitigate supply chain risks. Results obtained from UD rice supply chain risk mitigation research. Al Barokah, Boak found 13 risks from 17 risk agents. Of the 17 risk agents, 6 priority risk agents were selected which will be analyzed and determine the appropriate mitigation strategy to be implemented. As for the mitigation strategies obtained in this research, there are 16 mitigation actions.
SIMULASI PENJALARAN GELOMBANG TSUNAMI DI PESISIR SELATAN LUNYUK KABUPATEN SUMBAWA Mawardin, Adi; Pradjoko, Eko; Suroso, Agus
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4499

Abstract

An earthquake accompanied by a tsunami disaster occurred along the southern coast of Sumbawa, Lombok, and Bali on August 19, 1977. The potential for future earthquakes and tsunamis in the region warrants significant attention. This study aims to determine the tsunami wave travel time, wave height, tsunami run-up, and inundation distance. The research was conducted at Lunyuk Beach in Sumbawa, specifically at Teluk Lampui. The methodology involved in-depth interviews with survivors of the 1977 Sumba earthquake and tsunami, as well as field measurements. Research data included earthquake fault parameters, bathymetric maps, and coastal slopes. Tsunami propagation simulations were performed using COMCOT V1.6 software. The simulation results were validated against field observation data. Based on interviews and field measurements, it was found that the tsunami run-up height reached the roofs of houses, estimated at 6.30 meters based on similar house heights during the event. The simulation analysis of layer 01, using earthquake fault data, indicated that the tsunami reached the Lunyuk coast after 15 minutes. Layer 02 analysis aimed to determine tsunami run-up heights with wave scenarios of 7 meters, 8 meters, and 9 meters, resulting in run-up depths of 6.85 meters, 7.48 meters, and 7.92 meters respectively. The corresponding wave heights were measured at 14.38 meters, 16.35 meters, and 17.70 meters. The tsunami inundation distances for each scenario were 1,513 meters, 1,528 meters, and 1,532 meters respectively. This demonstrates that higher tsunami waves lead to greater run-up heights and longer inundation distances on land. Validation results showed that a 7-meter wave height closely matched the conditions during the 1977 Sumba earthquake tsunami event.
ANALYSIS OF THE EFFECT OF CALCINATION AND SULFURIC ACID (H2SO4) CONCENTRATION ON THE POMALAA NICKEL ORE LEACHING PROCESS, SOUTHEAST SULAWESI Emsal Yanuar; Rahmat Bukahri, La Ode; Bahtiar, Syamsul; Hidayat, Syamsul; Sudirman; Ardiansyah, Eka
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4580

Abstract

Analisis pengaruh konsentrasi larutan asam sulfat (H2SO4) dan suhu kalsinasi terhadap persen ekstraksi nikel dari bijih nikel Pomalaa menggunakan metode hidrometalurgi telah berhasil dilakukan. larutan pelindi yang digunakan pada penelitian ini adalah H2SO4 0.5 M, 2 M dan 4 M, sementara suhu kalsinasi bijih nikel diroasting pada suhu 350oC, 450oC dan 550oC. Bijih nikel didestruksi menggunakan larutan aqua regia untuk menganalisis kadar total nikel dalam bijih dan diperoleh kadar nikel sekitar 6.5429%. Berdasarkan hasil penelitian, persen ekstraksi nikel tertinggi diperoleh sekitar 70.850% pada sampel yang dikalsinasi 550oC dengan kondisi reaksi larutan pelindian H2SO4 2 M, rasio padat cair 1/20 (S/L) waktu pelindian sekitar 240 menit. Persen ekstraksi biji nikel tidak menunjukkan pengaruh yang signifikan ketika kondisi reaksi menggunakan H2SO4 4 M untuk ektraksi nikel. Sementara ketika larutan pelindiannya menggunakan asam H2SO4 0.5 M menunjukkan terjadi peningkatan persen ekstraksi nikel seiring meningkatnya suhu kalsinasi. Hal ini dibuktikan dengan adanya peningkatan ekstraksi nikel dari 28% pada sampel tanpa dikalsinasi menjadi 52% ketika bijih nikel dikalsinasi pada suhu 550oC. Hasil ini menunjukkan bahwa persen ekstraksi nikel sangat dipengaruh oleh perlakuan kalsinasi bijih nikel ketika diektraksi menggunakan asam sulfat konsetrasi rendah, namun ketika menggunakan H2SO4 dengan konsetrasi tinggi tidak memberikan pengaruh yang signifikan.
ANALISIS RISIKO BAHAYA DI PT. PEMBANGUNAN PERUMAHAN (PERSERO) TBK. PADA PROYEK PEMBANGUNAN BENDUNGAN TIU SUNTUK MENGGUNAKAN METODE HIRARC Nurul Hudaningsih; Fauzi, Rival; Adiasa, Iksan
Hexagon Jurnal Teknik dan Sains Vol 5 No 2 (2024): HEXAGON - Edisi 10
Publisher : Fakultas Teknologi Lingkungan dan Mineral - Universitas Teknologi Sumbawa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36761/hexagon.v5i2.4716

Abstract

The K3 management system is part of the company management system in the context of risk control to minimize dangers in the workplace. Work accidents can cause losses in time, wealth, property and lives. Accidents have causes so it is necessary to control and repair work places, tools and processes. This research was conducted using the HIRARC (Hazard Identification Risk Assessment and Risk Control) method to identify hazards that can occur in each job. In the preparation of HIRARC it is divided into three stages, where the first stage is hazard identification, then risk assessment, and the next stage is the risk control stage. The result of hazard identification is that there are several potential hazards in the work place and attitude. After carrying out a risk assessment, the risk level obtained before controlling the shootcreet work process was carried out, namely very high risk while those with medium risk tended to be high and medium tended to be low. After control was carried out, it was found that the risk value had decreased to predominantly green or low. Control of potential hazards in the shootcreet work area is proposed in the form of an appeal to complete PPE, use APK properly and an appeal to pay more attention to occupational safety and health in every work process. Keywords: Occupational Health and Safety, HIRARC, Risk Control

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