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Renanda Baghaz Dzulhamdhani Surya Putra
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Direktorat Riset dan Pengabdian kepada Masyarakat (DRPM), Lantai 7, Universitas Brawijaya Jl. Veteran Malang, 65145, Jawa Timur, Indonesia
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INDONESIA
Journal of Environmental Engineering and Sustainable Technology
Published by Universitas Brawijaya
ISSN : 23563109     EISSN : 23563117     DOI : https://doi.org/10.21776/ub.jeest
Core Subject : Science, Social, Engineering,
Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Environmental Science Mechanical Engineering
JEEST is an interdisciplinary and refereed journal, addresses matters related to environmental engineering and sustainable technology. Its range of themes encompasses ecological studies, field research, empirical work and descriptive analyses on topics such as environmental systems, environmental policies and politics, environmental legislation, environmental impact assessment, air, water and land pollution, water and energy related issues, engineering innovations, development, technical solutions and sustainability technology. Other matters related to or which influence the international debate on sustainability will be also considered.
Arjuna Subject : Ilmu Lingkungan (semua ketegori) - Ilmu Lingkungan (Lain-Lain)
Articles 166 Documents
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MITIGATION OF DAMAGE TO VANAME SHRIMP (Litopenaeus vannamei) GILL TISSUE DUE TO Vibrio parahaemolyticus INFECTION THROUGH THE IMMUNOSTIMULANT Spathoteredo obtusa FROM SIDOARJO, EAST JAVA Furqan, Andi Al
Journal of Environmental Engineering and Sustainable Technology Vol. 12 No. 2 (2025)
Publisher : Directorate of Research and Community Service (DRPM)

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Abstract

One mitigation strategy that can be implemented for shrimp infected with vibriosis is the administration of immunostimulants. However, the use of commercial immunostimulants derived from chemical compounds is a cause for concern due to potential long-term adverse effects. This study focuses on gill tissue damage, survival rates, and water quality. The objective of this study is to determine the effect of administering natural immunostimulants from S. obtusa on gill tissue damage, survival rate, and water quality in vanamei shrimp infected with the bacteria V. parahaemolyticus. The study was conducted using vanamei shrimp samples divided into 7 treatments, each containing 10 shrimp. The treatments consisted of administering S. obtusa immunostimulant at 300 ppm (A), 400 ppm (B), 500 ppm (C), 600 ppm (D), 700 ppm (E), positive control (K+) as a treatment without S. obtusa immunostimulant administered and infected with V. parahaemolyticus, and a negative control (K-) as normal shrimp. The lowest level of lamella fusion damage was 5%, and the highest was 30%. The lowest level of lamella fusion damage was 5%, and the highest was 70%. The highest survival rate was 90.00%, and the lowest was 56.67%. The results indicate that mitigation efforts using the immunostimulant extract of S. obtusa from Sidoarjo, East Java, have a significant effect
Multidimensional Sustainability Evaluation of Community-Based Material Recovery Facilities (TPS3R) and Strategies for Strengthening Regional Waste Management Systems: A Case Study in Mojokerto Regency SYUKRON, MOCHAMAD
Journal of Environmental Engineering and Sustainable Technology Vol. 12 No. 2 (2025)
Publisher : Directorate of Research and Community Service (DRPM)

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Abstract

Mojokerto Regency faces a significant waste crisis, with the Tempat Pengolahan Sampah Reduce-Reuse-Recycle (TPS3R) program contributing a negligible 0.015% to regional waste reduction. This failure suggests deep-seated systemic barriers beyond physical infrastructure. This study aims to analyze the sustainability status of the TPS3R program and formulate an integrated optimization strategy to achieve financial autonomy and institutional support. A quantitative assessment using Multidimensional Scaling (MDS) via RAPFISH was employed on a "positive deviance" case study, TPS3R Trawas Berseri Berdikari. The results reveal a critical paradox: while Legal & Institutional (89.43) and Technical (85.51) dimensions are "Highly Sustainable," the facility suffers from fundamental "financial fragility" (Economic score 73.24) and "disconnected governance." Despite its status as a best-practice model, the facility relies on a Rp 5,000,000 monthly subsidy to cover operational deficits. To address this, the research formulates an Integrated Optimization Strategy that pivots from a project-based to a service-based model. Key strategies include (1) Economic Diversification through premium compost marketing to tourism sectors to secure financial independence, (2) Institutional Reform transforming the local government from a passive regulator to an active technical facilitator, and (3) Asset Revitalization to optimize stagnant technology. These findings provide a replicable roadmap for policymakers to revitalize failing infrastructure into autonomous social enterprises, contributing directly to SDG 11.
Identification of Phytoplankton Diversity at Cengkrong Tidal Creek, Trenggalek, East Java, Indonesia Andhani, Titis Dwi
Journal of Environmental Engineering and Sustainable Technology Vol. 12 No. 2 (2025)
Publisher : Directorate of Research and Community Service (DRPM)

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Abstract

Phytoplankton is a key component that acts as a primary producer and bioindicator of changes in water quality. This study aims to identify phytoplankton species in Cengkrong Tidal Creek, Trenggalek, Indonesia. Sampling was conducted for six weeks at three stations representing the estuarine gradient. Parameters analyzed included phytoplankton abundance diversity index (H'), dominance index (D), and water parameters such as temperature, dissolved oxygen, pH, salinity, nitrate, and orthophosphate. The results of the study found five phytoplankton phyla, consisting of Bacillariophyta (70%), Chlorophyta (18%), Cyanophyta (6%), Dinoflagellates (3%) and Charophyta (3%). The Bacillariophyta phylum found 23 genera, Chlorophyta phylum found 6 genera, Cyanophyta phylum found 2 genera, Charophyta phylum found one genus, namely Mougeotia. The Dinoflagellate phylum found one genus, namely Amphidinium. The H' value ranges from 0.51 to 2.38, indicating low to moderate levels of diversity, while the D value ranges from 0.12 to 0.74, indicating low to high dominance. Water quality parameters generally still support phytoplankton growth, but nitrate and orthophosphate concentrations exceed the specified quality standards. Regular water quality monitoring, as well as preventing the entry of pollution sources into the waters, is necessary to avoid phytoplankton explosions that cause a decline in ecosystem quality.
Assessment of River Water Quality Using Pollution Index and Development of Pollution Control Strategies in the Petung River, Indonesia Dewi, Eliza Masita; Kurniawan, Andi; Anggayasti, Wresti Listu; Hasan, Muhammad Fathur Rouf; Wijayanto, Hari Wahyu
Journal of Environmental Engineering and Sustainable Technology Vol. 12 No. 2 (2025)
Publisher : Directorate of Research and Community Service (DRPM)

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Abstract

The Petung River supports domestic, agricultural, and economic activities in Pasuruan City but is subject to increasing anthropogenic pressures. This study aims to assess the river water quality status and formulate water pollution control strategies. Water quality was evaluated using the Pollution Index based on laboratory measurements conducted in April and June 2025. A SWOT analysis was performed by identifying internal and external factors through field observations and key informant interviews, followed by weighting and ranking to determine strategic priorities. The results indicate that the Petung River is predominantly classified as lightly polluted, with Pollution Index values ranging from 2.48 to 5.06, while one monitoring point in June 2025 reached a moderate pollution status. Although pH (6.75–7.80) and nitrate (1.15–3.40 mg/L) complied with Class II standards, total suspended solids, biological oxygen demand (6.49–16.01 mg/L), chemical oxygen demand, and total phosphate (0.27–3.03 mg/L) exceeded regulatory thresholds. The priority strategy is the establishment of communal wastewater treatment systems, supported by improved coordination, institutional capacity, community-based programs, and strengthened monitoring.
TEMPORAL ANALYSIS OF RIVER WATER QUALITY USING POLLUTION INDEX: A CASE STUDY OF THE REJOSO RIVER, PASURUAN REGENCY Yanitra, Fahmi Alpha; Semedi, Bambang; Anggayasti, Wresti Listu; Dewi, Juwita Ratna
Journal of Environmental Engineering and Sustainable Technology Vol. 12 No. 2 (2025)
Publisher : Directorate of Research and Community Service (DRPM)

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Abstract

Assessing temporal variations in river water quality is essential for understanding pollution dynamics and supporting effective water resource management, particularly in regions experiencing increasing anthropogenic pressure. This study investigates temporal trends in the Rejoso River, Pasuruan Regency, East Java, during 2022–2025 using the Pollution Index (PI) method. Water quality data were obtained from routine monitoring by the Environmental Agency and analyzed through compliance assessment, spatial distribution analysis, and non-parametric statistical methods, including the Mann–Kendall test and Sen’s slope estimator. The results show that several parameters, particularly biochemical oxygen demand (BOD), phosphate, and fecal coliform, frequently exceeded Class II water quality standards, indicating dominant organic and domestic pollution sources. Spatially, water quality declined from upstream to downstream, with the middle section identified as the most polluted due to cumulative anthropogenic activities such as domestic discharge and agricultural runoff. Temporal analysis revealed increasing trends in key pollution indicators, especially BOD and COD, suggesting a gradual increase in pollutant loads. The Pollution Index classified the river as predominantly lightly polluted, with a temporary improvement in 2024 followed by deterioration in 2025. These findings highlight increasing environmental pressure and the need for integrated water quality management strategies.
REDUCING POWER ACTIVITY OF MILKFISH (CHANOS CHANOS) BONE HYDROLYSATES PRODUCED BY DIFFERENT RETORTING TIMES Fahlivi, Muhammad Rizal; Hardoko; Prihanto, Asep Awaludin; Widodo, Maheno Sri
Journal of Environmental Engineering and Sustainable Technology Vol. 12 No. 2 (2025)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/

Abstract

Bioactive peptides recovered from fish-processing by-products have emerged as promising natural antioxidants with potential applications in functional foods and nutraceuticals. In the present study, protein hydrolysates were prepared from milkfish (Chanos chanos) bones by high-temperature retorting at 121°C for 15 and 120 min to evaluate the influence of extraction time on their reducing power. Following retorting, the hydrolysates were centrifuged, neutralized with phosphoric acid, freeze-dried, and characterized for protein content, degree of hydrolysis (DH), molecular weight distribution, and reducing power activity. The freeze-dried hydrolysates contained 85.10–89.27% protein, while DH values ranged from 67.88% to 72.10%. SDS-PAGE analysis revealed that the 15-min hydrolysate mainly consisted of proteins within the molecular weight range of 30,000–70,000 Da, whereas the 120-min treatment predominantly generated peptide fractions below 14,400 Da. Among the retorting conditions evaluated, the hydrolysate produced after 120 min exhibited the highest reducing power (0.61 ± 0.01 at 12 mg/mL). These findings demonstrate that retorting time markedly influences peptide characteristics and antioxidant capacity. Nevertheless, additional studies employing intermediate retorting durations are required to identify the optimum processing conditions for maximizing the reducing power of milkfish bone hydrolysates.

Page 17 of 17 | Total Record : 166

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