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Journal : Jurnal Sains Teknologi dan Lingkungan (JSTL)

Analisis Bibliometrik Perkembangan Teknologi Beton Serat (Fiber Reinforced Concrete) dengan Campuran Serat Alam De Side, Gagassage Nanaluih; Khalil, Fakhrul Irfan; Zulfikar, Wahyudi; Putra, Guyup Mahardhian Dwi
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.671

Abstract

The addition of natural fibers in concrete is of great interest in the field of construction materials. Compared to man-made fibers, natural fibers are cheaper and locally available. In addition, the use of natural fibers is certainly more eco-friendly than the use of synthetic fibers but can produce the same strength in its application as an additive. This study aims to determine the development trend of concrete technology with natural fiber admixtures, including the various types of natural fiber waste used, so that it can be a consideration and reference in the use of natural waste in the mix design of natural fiber concrete (Fiber Reinforced Concrete). This study uses bibliometric analysis and literature review methods using Publish or Perish/Harzing software and VOSviewer v.1.6.20. This study was conducted by bibliometric analysis method of concrete technology development that utilizes waste mixture as fiber in Google Scholar indexed publications from 2014 to 2023. Furthermore, the co-cite, coupler, and cluster analysis methods will be used to analyze the collaboration network, and VOSviewer v.1.6.20 is used to visualize this network with three visualization analyses; Network Visualization, Overlay Visualization, and Density Visualization. Of the total publications indexed by Google scholar, namely 989 documents, 958 documents have year information and 31 documents do not have information on the year of publication. The highest publication growth development with this topic occurred in 2021, which reached 284 publications (28.7%), while the lowest publication development was in 2024, totaling 10 documents (1%).
Rancang Bangun Sistem Pemantauan Suhu dan Kelembaban Udara Berbasis Arduino Uno pada Kumbung Jamur Merang Amaliah, Wenny; Putra, Guyup Mahardhian Dwi; Khalil, Fakhrul Irfan; Dewi, Endang Purnama; Sholihin, Ibadias; Hidayat, Taufiq
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 1 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i1.758

Abstract

The environmental conditions of a mushroom house are a crucial factor influencing the growth of straw mushrooms, particularly in terms of temperature and humidity parameters. Therefore, it is essential to continuously monitor the environmental conditions within the mushroom house, specifically temperature and relative humidity (RH). This study aims to design a real-time temperature and humidity monitoring system based on Arduino Uno for use in a straw mushroom house. The research consists of several stages: literature review, design and assembly, programming, testing, and evaluation of testing results using the mean absolute percentage error (MAPE) method. The results show that the developed temperature and humidity monitoring system functions effectively to monitor environmental conditions within the mushroom house. The evaluation of the measurement results using the MAPE method indicates a minimum error rate for temperature and humidity measurements, with a percentage of 2.49% and 9.80%, respectively.
Rancang Bangun Sistem Pendingin Air Nutrisi Berbasis Peltier untuk Optimasi Pertumbuhan Tanaman Hidroponik Saputra, Oki; Abdullah, Sirajuddin H.; Sumarsono, Joko; Priyati, Asih; de Side, Gagassage Nanaluih; Putra, Guyup Mahardhian Dwi; Setiawati, Diah Ajeng; Amaliah, Wenny; Dewi, Endang Purnama; Nurrohman, Reza Kusuma; Zamzami, Muhammad Ilham; Sani, Nurwan
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 11 No. 2 (2025): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v11i2.856

Abstract

High ambient temperatures inside tropical greenhouses can significantly raise nutrient solution temperatures in vertical hydroponic systems, disrupting nutrient uptake and reducing plant productivity. This study focuses on the design and development of a nutrient cooling system (chiller) using two TEC1-12706 thermoelectric modules (Peltier) arranged in series to enhance heat dissipation performance. The nutrient solution is pumped from the reservoir to the cooling chamber using a 12 V DC pump and recirculated in a closed-loop configuration. The chiller system is fully automated, controlled by two DH48S digital timers operating simultaneously: one activates Peltier 1, while the other controls Peltier 2 via the NC output (5 minutes) and the pump via the NO output (30 seconds), enabling alternating programmed cooling and circulation. The entire chiller unit is active only from 08:00 to 18:00 WITA using a KG316T programmable timer, corresponding to peak thermal stress hours inside the greenhouse. Results showed that despite greenhouse temperatures reaching up to 39.4 °C with relative humidity dropping to 47.6%, the chiller system maintained nutrient solution temperatures within the optimal 27–30 °C range. This design proved effective in reducing and stabilizing nutrient temperature under high heat microclimates. With its simple, automated, and energy-efficient architecture, the chiller system offers a promising solution for small-scale vertical hydroponics and greenhouse-based urban farming in tropical regions.
Model Matematik Prediksi Pembentukan Biogas dari Limbah Kotoran Ternak Putra, Guyup Mahardhian Dwi; Setiawati, Diah Ajeng
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 10 No. 1 (2024): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v10i1.591

Abstract

Petroleum is currently the most commonly used fuel in Indonesia, but its availability is decreasing! Therefore, alternative energy sources are needed.  One solution is to convert agricultural and livestock waste into biogas, which is a renewable and environmentally friendly energy source! Biogas can be used for cooking, generating electricity, and even as fuel for vehicles! The aim of this research is to develop a mathematical model for predicting biogas volume! Can you believe it? The experiment involved creating biogas from a mixture of cow dung and water in a 1:2 ratio. The mixture was stirred until evenly distributed in a portable biogas floating drum. No gas was formed from the first day until the seventh day, but on the eighth day, gas began to form and its volume was recorded! A mathematical model approach, namely the Gompertz and Logistic Models, was used to predict the formation of biogas volume! And guess what? The results indicate that both models were able to predict the data accurately with a coefficient of determination (R2) of 0.99!  The validity test results show that the Gompertz model is the most reliable for making predictions! This is indicated by the bias value of 0.002, MSEP value of 0.000, and EI of 0.058. The validity test value is smaller than the validity test value obtained in the Logistic model, which is a bias value of 0.016, MSEP value of 0.005, and Ei value of 0.329.