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All Journal International Journal of Hydrological and Environmental for Sustainability
Radhitya, Berwyn Dzaky
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Environmental Science

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3D Modeling of of Distribution Andesite and Breccia Rocks Using Geoelectric Resistivity in Potential Areas of Minerals in Madiun Regency, Indonesia Prastowo, Rizqi; Pambudi, Setyo; Rizqi, Al Hussein Flowers; Ipmawan, Vico Luthfi; Arimurti, Dyah Arum; Radhitya, Berwyn Dzaky
International Journal of Hydrological and Environmental for Sustainability Vol. 3 No. 2 (2024): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v3i2.474

Abstract

This research focuses on the distribution of andesite and breccia rocks in East Java, Indonesia, specifically in Morang Village, Madiun Regency, through geoelectric resistivity measurements. This study aims to enhance geoelectric interpretation from 2D to 3D, providing high accuracy in target positioning for potential building material resources. By employing a dipole-dipole configuration with electrode spacing, the resistivity values of subsurface rocks were analyzed to classify the types and distributions of building materials, such as andesite and breccia. Data was collected through field measurements and geological surveys, followed by inverse modeling using the least squares method. The results reveal that andesite, with resistivity values above 1000 Ωm, is distributed predominantly in the southeast-northwest trend at a depth of 10–15 meters, while breccia, with resistivity values between 600–900 Ωm, is found at various depths closer to the surface. The geological interpretation suggests that the southeast-northwest orientation may correlate with an ancient basin structure, which directed lava flow during past volcanic activities, forming these rock layers. This study contributes valuable information for local infrastructure planning by providing data on accessible rock resources essential for construction. The application of the 3D geoelectric model offers an effective tool for environmental assessment and mineral exploration, promoting sustainable resource management.
Sustainable Bioethanol Production from Carica (Carica pubescens) Peel Waste: Optimization of Acid Hydrolysis and Fermentation Time Ubaidilah, Sofana; Irfan, Akhmad; Sunaryo, Sunaryo; Yongthong, Keodouangdy; Sampurno, Rizky Mulya; Radhitya, Berwyn Dzaky
International Journal of Hydrological and Environmental for Sustainability Vol. 4 No. 2 (2025): International Journal of Hydrological and Environmental for Sustainability
Publisher : CV FOUNDAE

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58524/ijhes.v4i2.771

Abstract

The global energy crisis and continued reliance on fossil fuels have intensified the search for sustainable alternative energy sources, particularly biomass-derived biofuels. One promising yet underutilized resource is the peel waste of Carica pubescens, a papaya variety indigenous to the Dieng Plateau. This study investigates the potential of Carica peel waste as a bioethanol feedstock through sulfuric acid (H₂SO₄) hydrolysis and fermentation using Saccharomyces cerevisiae. To optimize sugar yield, the concentration of H₂SO₄ was varied between 0.1 M and 0.8 M, while fermentation durations were set at 96, 120, 144, and 168 hours. Results indicated that hydrolysis with 0.8 M H₂SO₄ produced the highest sugar concentration (6.8%). The most effective fermentation period was 120 hours, yielding 64% bioethanol with a density of 0.8679 g/mL, a calorific value of 4,831 kcal/kg, a flame height of 14.6 cm, and a combustion temperature of 438°C. These findings demonstrate the viability of Carica peel waste as a valuable raw material for bioethanol production. Its high efficiency and favorable fuel properties highlight its potential for integration into local renewable energy initiatives, contributing to sustainable energy development. Further studies on large-scale implementation and process optimization are recommended to maximize its industrial application.
Co-Authors Al Hussein Flowers Rizqi Arimurti, Dyah Arum Irfan, Akhmad Rizky Mulya Sampurno Rizqi Prastowo Setyo Pambudi Sunaryo Ubaidilah, Sofana Vico Luthfi Ipmawan Yongthong, Keodouangdy