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Journal : Indonesian Journal of Science and Technology

A Design and performance analysis of a telemetry system for remote monitoring of turbidity of water during the COVID-19 pandemic Hasanah, Lilik; Hakim, Wahyu Luqmanul; Aminudin, Ahmad; Sahari, Siti Kudnie; Mulyanti, Budi
Indonesian Journal of Science and Technology Vol 5, No 2 (2020): IJOST: VOLUME 5, ISSUE 2, 2020
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v5i2.24705

Abstract

A turbidity telemetry system for COVID-19 pandemic situations using nRF24L01+transceiver and SEN0189 water turbidity sensor-based microcontroller has been successfuly  developed.. The method used to characterize the sensor is by comparing sensor output voltages with the value of water turbidity. Turbid water used was created by adding distilled water with a concentration of sediment obtained from the filtered sediment with less than 60 μm in diameter. Data transmission performance for various transmit power was done by calculating the error percentages by comparing the number of messages sent by transmitter and received by receiver. The transmit power settings were 0, -6, -12, and 18 dBm and variations in the distance of data transmission from 10 to 80 m. The test results show that the water turbidity sensor has a good measurement range in measuring turbidity of water from 1.873 to 3500 NTU. Higher concentrations of sediment and turbidity of the water made the sensor output voltage decrease. There was a decrease in output voltage in the value, namely -0.0006 in turbidity sensor sensitivity. The results also show an increase in error percentages as the distance of data transmission increases, while the bigger the transmit power is used for data transmission, the smaller the percentage of errors occurs.
Biomass-Based Supercapacitors Electrodes for Electrical Energy Storage Systems Activated Using Chemical Activation Method: A Literature Review and Bibliometric Analysis Ida Hamidah; Ramdhani Ramdhani; Apri Wiyono; Budi Mulyanti; Roer Eka Pawinanto; Lilik Hasanah; Markus Diantoro; Brian Yuliarto; Jumril Yunas; Andrivo Rusydi
Indonesian Journal of Science and Technology Vol 8, No 3 (2023): (ONLINE FIRST) IJOST: December 2023
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/ijost.v8i3.60688

Abstract

Currently, carbon derived from biomass waste or residues is being intensively utilized as electrodes due to its excellent electrical properties, including high conductivity, appropriate porosity, and a specific surface area suitable for supercapacitor applications. Despite its advantages, the performance of supercapacitors made from biomass-derived carbon is insufficient for engineering applications because of the challenges in obtaining the mesoporous structure of activated carbon (AC). Therefore, this study highlights the potential of biomass-based carbon as the electrodes of a highly efficient supercapacitor, which can facilitate highly efficient current transport in energy storage systems. It comprehensively discusses various biomass material sources and activation methods to produce carbon, with a focus on the physical and electrical properties. Initially, the study discusses carbon activation methods and mechanisms to understand why activating agents and electrolyte solutions have a high specific surface area and specific capacitance. It then concentrates on the chemical activation method and its importance in making AC useful as an efficient electrode. Finally, in this study, various biomass sources were discussed to highlight the performance of supercapacitors electrodes originating from agricultural and wood residues relating to the specific capacitance and capacitance retention. Based on the obtained results, it is concluded that biomass-based carbon materials could be the most advantageous platform material for energy conversion and storage.
Co-Authors Aay Susilawati Achmad Samsudin Adi Bagus Suryamas Ahmad Aminudin Ajuni B. Pantjawati Almadaniy, Hanif Alta Ridho Anugrah Andhy Setiawan Andrivo Rusydi Apri Wiyono Arjuni B Pantjawati Ayub Subandi Brian Yuliarto Budi Mulyanti Cecep Kusmana Chandra Wulandari Dadin Mahmudin Deni K. Jamil Dewi Yulianawati Dewi Yulianawati Diana Rochintaniawati E. Suhendi Edy Junaidi Eis Nurzakiyah Eka Pawinanto, Roer Endi Suhendi Endi Suhendi Euis Sustini Fauzan, Jahril Nur Ghina Aghnia Nur Assyifaa Goib Wiranto Goib Wiranto Goib Wiranto, Goib Hera Novia Herni Yuniarti Suhendi Heru Yuwono Ida Hamidah Ida Hamidah Ida Kaniawati Indra Irawan Iqbal Syamsu Iqbal Syamsu Ismu Wahyudi Iwan Kustiawan Jumril Yunas Jumril Yunas, Jumril Kapıcı, Hasan Özgür Khairurrijal Khairurrijal Kusrini, Priyani Lee, Chang-Wook Luqmanul Hakim Maknun, Johar Maman Budiman Markus Diantoro Mikrajuddin Abdullah Mimin Iryanti Muhammad Zakaria Nada Sadidah Naftalia Trivenia Simbolon Nurjannah Nurjannah Nurul Ashri Nurul Huda Nuryani Rustaman P. Susthita Menon Pamungkas, Rahadian Sri Pangestu, M. Assadillah Priyani Kusrini Rahadian Sri Pamungkas Rahmondia N. Setiadi Rama, Gusti Ramayanti, Suci Ramdhani Ramdhani Ramdhania, Lathifa Nur Rifqi Md Zain, Ahmad Roer Eka Pawinanto, Roer Eka Roslina Roslina, Roslina Sahari, Siti Kudnie Sahbudin Shaari Satria Zulkarnaen Bisri Setiya Utari Setyo Nugroho, Harbi Siti Kudnie Sahari Sudirman Sudirman Sugandi, Gandi Sukirno Sukirno Sukirno Sukirno Susilawati, Aay Tommi Hariyadi, Tommi Toto Winata Tri Lunggari D. C Wahyu Sasongko Putro Waslaluddin MT Widyaningrum Indrasari Winny Liliawati Wulandari, Chandra Yuski Maolid Rizki Faozan Yusuf Nur Wijayanto Yuyu Rachmat Tayubi Zain, Ahmad Zulkarnain