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Waste Technology
Published by Universitas Diponegoro
ISSN : -     EISSN : -     DOI : -
Core Subject : Science, Education,
Computer Science & IT Other
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Articles 2 Documents
 1 
Search results for , issue "Vol 12, No 2 (2024)" : 2 Documents clear
Design of Integrated pH-Water Level Sensors using Arduino Uno-ESP 32 Microcontroller for Integrated Rice-Fish Farming Waste Water Utilization Dhiya’ulhaq, Syaikha Butsaina; Ramadiani, Haliza; Kaladinanty, Malika Pintanada; Julianto, Mohammad Endy; Indahsari, Siti Rachmi; Suhendra, Ahmad Adi
Waste Technology Vol 12, No 2 (2024)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/12.2.52-59

Abstract

Integrated Rice-Fish Farming System (IRRFS), a conventional rice, poultry, and fish farming system which is widely practiced in south asia, facing the serious obstacles amidst its advantageous contemption. The main challenge is inharmonious water uptake management as the side effect of its area arrangement and inappropriate water irrigation system due to the lack of technology application, leading to the chemical contamination and high water consumption. This paper develop an integrated pH and water level sensors using combined arduino uno-esp 32 microcontroller for the newly designed IRRFS (mina padi) concept and the new concept of IRRFS in terms of area arrangement restructuration with 1:500 diminution scale, aiming to overcome the pest and chemical contamination to the system and high water amount necessity. The integrated pH-water level sensor is designed to maintain daily water uptake of fish ponds and paddy fields to prevent harvest failure. The integrated sensor will instruct either 1st pump or 2nd pump to drain in or drain off the water from the system. The working accuracy is tested by both calibration and the prototype experiment, resulting in the simultaneity working ability of integrated sensors with 1st pump and 2nd pump which possess with high accuracy.
Kinetic and Isotherm Analysis of TiO₂/UiO-66-NH₂ Composites for Treating Produced Water Contaminants Kusworo, Tutuk Djoko; Budiyono, Budiyono
Waste Technology Vol 12, No 2 (2024)
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/12.2.%p

Abstract

The TiO₂/UiO-66-NH₂ composites synthesized through a hydrothermal method, demonstrated a significant enhancement in photocatalytic activity under visible light, offering a promising solution for the treatment of pollutants in produced water. These composites exhibited exceptional photocatalytic adsorption and degradation capabilities, efficiently removing various contaminants. The adsorption process during pollutant removal was effectively modeled by both the Freundlich and Langmuir isotherms, indicating the heterogeneous nature of the adsorption sites and the monolayer adsorption behavior, respectively. The composites achieved impressive removal efficiencies of 88.46% for NH₃-N and 81.97% for total dissolved solids (TDS), underscoring their potential to address common pollutants in produced water. UV-vis spectroscopy analysis revealed a band gap energy of 2.28 eV for the TiO₂/UiO-66-NH₂ composites, which is lower than that of pure TiO₂, contributing to enhanced photocatalytic performance under visible light. This reduced band gap improves the material's ability to absorb visible light, thereby facilitating more efficient degradation of organic pollutants. Furthermore, the pseudo-second-order kinetic model best described the adsorption process for both TiO₂ and TiO₂@UiO-66-NH₂ composites, suggesting that chemisorption is the dominant mechanism for NH₃-N removal. This indicates that the composites exhibit a high affinity for NH₃-N, effectively removing it from produced water. Overall, the TiO₂/UiO-66-NH₂ composites provide a promising approach for mitigating contaminants in produced water, demonstrating their potential for use in both environmental and industrial water treatment applications. 

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