Sriwijaya Journal of Environment

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INTERNATIONAL · PEER-REVIEWED · OPEN ACCESS

Applied environmental science & engineering for the tropics and the developing world — connecting local evidence to global environmental challenges.

p-ISSN 2527-4961 · e-ISSN 2527-3809 · Crossref DOI 10.22135 · Published by the Graduate Program of Universitas Sriwijaya in collaboration with IATPI

Water & WastewaterPollution & RemediationSolid Waste & Circular EconomyEcology & BiodiversityClimate & SustainabilityGeospatial & Remote Sensing

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Journal title	Sriwijaya Journal of Environment
Initials	SJE
Abbreviation	Sriwijaya J. Environ.
Frequency	3 issues per year
DOI	prefix : 10.22135 by
Print ISSN	2527-4961
Online ISSN	2527-3809
Editor-in-chief	Prof. Dr. Fitri Maya Puspita, S.Si., M.Sc
Publisher	Graduate Program of Universitas Sriwijaya in collaboration with IATPI
Citation Analysis	Sinta \| Google Scholar

Sriwijaya Journal of Environment (SJE; ISSN 2527-4961 print, 2527-3809 online) is an international, peer-reviewed, fully open-access journal published three times a year by the Graduate Program of Universitas Sriwijaya, Indonesia, in collaboration with IATPI. Established in 2016, SJE publishes original research, critical reviews, and short communications in applied environmental science and engineering, with priority on tropical and developing-country contexts.

Manuscripts must report original work that is not published elsewhere and is not under consideration by another journal, must fall within the journal’s aims and scope, and must be written in clear, scholarly English. All manuscripts are prepared using the official SJE template and submitted exclusively through the journal’s online system at ojs.pps.unsri.ac.id. Every manuscript undergoes double-blind peer review.

All articles are published under a CC BY-NC-SA 4.0 licence with no submission or publication charges. Each article is assigned a Crossref DOI (prefix 10.22135) and complete machine-readable metadata. A member of Crossref since August 2016, SJE adheres to the COPE Core Practices and the Principles of Transparency and Best Practice in Scholarly Publishing.

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Articles in the Sriwijaya Journal of Environment have earned 114+ citations from 88 Scopus-indexed journals — published by Elsevier, Springer Nature, MDPI, Wiley, Taylor & Francis and more. Verified evidence of the journal's growing international scientific impact.

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114⁺Scopus citations

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31Articles cited

Current Issue

Vol. 11 No. 1 (2026): Sriwijaya Journal of Environment

In This Issue — Volume 11, Issue 1 (2026). Eight original studies, eight countries, two continents: local evidence for the world’s shared environmental challenges.

The opening issue of Volume 11 assembles eight original studies (pp. 1–84) by approximately 51 researchers affiliated with institutions across eight countries and two continents — Malaysia, China, Indonesia, India, Bangladesh, Nigeria, the Democratic Republic of the Congo, and Taiwan. Every study is situated in the tropics or the developing world, exemplifying the journal’s mandate to connect locally grounded evidence with globally significant environmental challenges.

The issue is distinguished by its international character. Several contributions are the product of cross-border collaboration, most notably a sixteen-author consortium spanning Malaysia, China, and Indonesia (pp. 1–10) and a Taiwan–Indonesia partnership in food bioprocessing (pp. 75–84).

Water quality and aquatic systems. Water constitutes the dominant scientific thread. The studies characterise the parasite assemblage and zoonotic potential of a commercially important marine fish in the South China Sea (pp. 1–10); establish physicochemical and thermal-pollution baselines for a canal adjacent to a coal mine in Bangladesh (pp. 31–41); quantify petrochemical contamination and ecological risk across the sediment–water–biota continuum of the Bonny Estuary, Nigeria (pp. 42–53); optimise a free-water-surface constructed wetland for landfill-leachate treatment in Indonesia (pp. 54–64); and benchmark high-resolution single-beam bathymetry against IHO S-44 standards for engineering validation in Lagos, Nigeria (pp. 65–74).

Air, land, and food systems. Complementing this focus, the issue extends to air, land, and food: the valorisation of rice-straw lignocellulose into particulate-matter filters (pp. 11–18); a GIS-based assessment of spatial compliance and ecosystem risk arising from service-station proliferation in Kinshasa (pp. 19–30); and the conversion of defatted soy flour into high-moisture textured vegetable protein through single-screw cooking extrusion (pp. 75–84).

Cross-cutting perspectives. A recurrent motif is the transformation of waste into value — rice straw into air filters, wetlands into treatment infrastructure, and by-product soy flour into food protein — reflecting a growing regional commitment to circular, resource-efficient practice. Methodologically, the issue is equally broad, drawing on geographic information systems and remote sensing, international hydrographic standards, multivariate statistics, food-process engineering, and parasitological microscopy.

Taken together, these eight studies affirm that environmental challenges transcend national borders, and that the Sriwijaya Journal of Environment continues to serve as a meeting point for evidence-based solutions — from the tropics, for the world.

Published: 03/08/2026

Articles

Parasite Assemblage, Prevalence and Zoonotic Potential in the Spotfin Bigeye Priacanthus tayenus from the South China Sea, East-Coast Peninsular Malaysia
Suhairi Mazelan Higher Institution Centre of Excellence, Institute of Tropical Aquaculture and Fisheries (HICoE-AKUATROP), Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia Malaysia , Faizah Shaharom Faculty of Marine Science and Environment, Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia Malaysia , Wahidah Wahab Higher Institution Centre of Excellence, Institute of Tropical Aquaculture and Fisheries (HICoE-AKUATROP), Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia Malaysia , Muhammad Hafiz Borkhanuddin Faculty of Marine Science and Environment, Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia/Institute of Oceanography and Environment (INOS), Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia Malaysia , Nor Asma Husna Mohammed Yusoff Higher Institution Centre of Excellence, Institute of Tropical Aquaculture and Fisheries (HICoE-AKUATROP), Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia/Food Security Research Cluster, Universiti Malaysia Terengganu, Terengganu, Malaysia Malaysia , Sharifah Raina Manaf Universiti Teknologi MARA (UiTM) Sarawak Branch, Mukah Campus, Sarawak, Malaysia Malaysia , Norazizah Kemat Department of Fisheries, Kuantan Biosecurity Centre, Pahang, Malaysia Malaysia , Nora Faten Afifah Mohamad Universiti Putra Malaysia Bintulu Sarawak Campus, Sarawak, Malaysia Malaysia , Ruhil Hayati Hamdan Department of Paraclinical Studies, Faculty of Veterinary Medicine, Universiti Malaysia Kelantan (UMK), Kelantan, Malaysia Malaysia , Melissa B. Martin Faculty of Marine Science and Environment, Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia/Institute of Oceanography and Environment (INOS), Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia Malaysia , Mazlan Abd Ghaffar Higher Institution Centre of Excellence, Institute of Tropical Aquaculture and Fisheries (HICoE-AKUATROP), Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia/Faculty of Marine Science and Environment, Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia/Food Security Research Cluster, Universiti Malaysia Terengganu, Terengganu, Malaysia/STU-UMT Joint Shellfish Research Laboratory, Shantou University, Guangdong, P.R. China Malaysia , Ahmad Shuhaimi Draman Higher Institution Centre of Excellence, Institute of Tropical Aquaculture and Fisheries (HICoE-AKUATROP), Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia Malaysia , Khor Waiho Higher Institution Centre of Excellence, Institute of Tropical Aquaculture and Fisheries (HICoE-AKUATROP), Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia/Food Security Research Cluster, Universiti Malaysia Terengganu, Terengganu, Malaysia/STU-UMT Joint Shellfish Research Laboratory, Shantou University, Guangdong, P.R. China Malaysia , Shengkang Li STU-UMT Joint Shellfish Research Laboratory, Shantou University, Guangdong, P.R. China/Marine Biology Institute, Science Center, Shantou University, Guangdong P.R. China China , Yenni Putri Sari 1Laboratory of Fisheries, Marine Science Study Program, Faculty of Agriculture, Universitas Bengkulu, Bengkulu, Indonesia. Indonesia , Mohd Ihwan Zakariah Higher Institution Centre of Excellence, Institute of Tropical Aquaculture and Fisheries (HICoE-AKUATROP), Universiti Malaysia Terengganu (UMT), Terengganu, Malaysia/Food Security Research Cluster, Universiti Malaysia Terengganu, Terengganu, Malaysia Malaysia
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Background: Marine capture fisheries are central to food security in Southeast Asia, yet commercially harvested fish can harbour parasites of ecological and public-health significance.

Objective: To characterise the parasite assemblage of the spotfin bigeye Priacanthus tayenus from the South China Sea off east-coast Peninsular Malaysia (Terengganu) and to benchmark the zoonotic and quality-relevant taxa against seafood-safety standards.

Methods: Fifty wild-caught fish (total length 13.3 ± 2.1 cm) were examined by standard parasitological post-mortem; parasites were slide-mounted and identified morphologically. Infection and diversity indices, a chi-square test, Spearman correlations, a Welch t-test and principal component analysis (PCA) were computed; α = 0.05.

Results: A total of 365 specimens of ten taxa (six ectoparasite and four endoparasite groups) were recovered. The anisakid nematode Hysterothylacium sp. dominated (177 specimens; 48.5% relative dominance; 60% prevalence) and Didymozoon sp.1 was most prevalent (62%). Prevalence differed among taxa (χ² = 130.47, df = 9, p < 0.001) and correlated strongly with abundance (ρ = 0.939, p < 0.001). Diversity was moderate (Shannon H' = 1.327; Berger–Parker d = 0.485) and PC1 explained 94.0% of the infection-parameter variance.

Conclusion: Visible zoonotic anisakid larvae and trypanorhynch cestodes conflict with the visible-parasite provisions of EU Regulation (EC) 853/2004, underscoring the need for candling, evisceration, freezing and routine surveillance to safeguard seafood safety and food security in this fishery.

Pages: 1-10

Views: 44 Downloads: 26
Fabrication and Performance Evaluation of Rice-Straw Lignocellulosic Filters for Particulate Matter Removal from Air
Gurleen Kaur Department of Biotechnology, DAV University, Jalandhar, India India , Simrandeep Kaur Department of Biotechnology, DAV University, Jalandhar, India India
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Background: Ambient particulate matter (PM) is the leading environmental health risk worldwide, yet conventional polypropylene and fiberglass filters are fossil-derived and non-biodegradable, while open burning of crop residues remains a major regional PM source.

Objective: This study fabricated biodegradable air filters from post-harvest rice-straw lignocellulose using a simple, binder-free sequential treatment and evaluated their particulate filtration performance.

Methods: Rice straw was treated sequentially with 1% NaOH, 3% H2O2, and 1% H2SO4, neutralized, molded, and dried, then characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, and liquid-displacement porosimetry, and tested in a custom wind tunnel against an incense-smoke challenge at face velocities of 0.1-1.0 m s-1. Linear and quadratic regression, Pearson correlation, and one-way ANOVA with effect sizes were applied.

Results: The treatments produced a hierarchically porous microfibrous network with 88.5% porosity. At 0.5 m s-1 the filter removed 96.5 ± 0.8% of PM2.5 and 98.2 ± 0.5% of PM10 at only 45 ± 2.0 Pa, giving a Quality Factor of 0.074 Pa-1. Efficiency fell and resistance rose with face velocity (R2 = 0.945-0.995; ANOVA p < 0.001; η2 > 0.95). Single-pass output met both WHO 2021 and Indonesian PP 22/2021 PM2.5 limits.

Conclusion: Rice-straw lignocellulosic filters offer a low-cost, biodegradable, and policy-relevant route to particulate control that simultaneously valorizes an open-burning agricultural residue.

Pages: 11-18

Views: 61 Downloads: 28
Spatial Non-Compliance and Ecosystem Risk of Service-Station Proliferation in a Densely Populated Tropical Megacity District: A GIS-Based Assessment of Funa, Kinshasa (DR Congo)
Kumbu Ngoma Gautier Assistant, Faculty of Oil, Gas and Renewable Energy, University of Kinshasa, Kinshasa, DR Congo Congo, The Democratic Republic of the , Vuni Simbu Alexis Assistant, Faculty of Sciences and Technologies, University of Kinshasa, Kinshasa, DR Congo Congo, The Democratic Republic of the , Mayala Tshiamu Héritier Researcher, Geo-Hydro-Energy Group, Department of Geosciences, Faculty of Sciences and Technologies, University of Kinshasa, Kinshasa, DR Congo Congo, The Democratic Republic of the , Ntombi Mwen Mutsindu Abel Assistant, Faculty of Sciences and Technologies, University of Kinshasa, Kinshasa, DR Congo Congo, The Democratic Republic of the , Losembe Konga Moïse Assistant, Faculty of Sciences and Technologies, University of Kinshasa, Kinshasa, DR Congo Congo, The Democratic Republic of the , Lemfu Emmanuel Researcher, Geo-Hydro-Energy Group, Department of Geosciences, Faculty of Sciences and Technologies, University of Kinshasa, Kinshasa, DR Congo Congo, The Democratic Republic of the , Umba Siasi Victorine Researcher, Geo-Hydro-Energy Group, Department of Geosciences, Faculty of Sciences and Technologies, University of Kinshasa, Kinshasa, DR Congo Congo, The Democratic Republic of the , Fils Makanzu Imwangana Professor, Faculty of Sciences and Technologies, University of Kinshasa; Director-General, National Institute of Building and Public Works, Kinshasa, DR Congo Congo, The Democratic Republic of the , N'zau Umba-di-Mbudi Clement Professor, Faculty of Sciences and Technologies, University of Kinshasa; Dean, Polytechnic Faculty, President Joseph Kasa-Vubu University, Boma, DR Congo Congo, The Democratic Republic of the
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Background: Unregulated proliferation of open-air service (petrol) stations in Kinshasa, Democratic Republic of the Congo, poses ecosystem and public-health risks through soil, water and air pollution, fire, and chronic exposure to carcinogenic volatile hydrocarbons.

Objective: This study assessed compliance of station siting with separation-distance standards and quantified the resulting spatial risk in the Funa pilot district.

Methods: Twenty-four stations were geolocated by GPS (2019–2023); Euclidean distances to the nearest dwelling, school, church and hospital, and to the nearest neighbouring station, were computed in a GIS and analysed by one-way ANOVA with Tukey HSD, Pearson correlation, regression and principal component analysis, then synthesised in a composite Spatial Encroachment Risk Index (SERI).

Results: Mean station-to-dwelling distance was 21.8 ± 7.8 m, with no station meeting the 50 m minimum; mean distances to schools (157.8 ± 48.5 m), churches (127.9 ± 42.2 m) and hospitals (286.7 ± 103.0 m) all fell below the 500 m standard (0% compliance), and only 20.8% met the 500 m inter-station criterion. Distances differed by receptor class (F(3,92) = 77.07, p < 0.001, η² = 0.715), and newer stations were sited closer to receptors (hospitals r = −0.745, p < 0.001); 21 of 24 stations were High or Very High risk.

Conclusion: Total non-compliance demonstrates an urgent need for a specific siting decree and an accompanying layout manual to protect the urban ecosystem and population health.

Pages: 19-30

Views: 44 Downloads: 9
Physicochemical Baseline and Thermal Pollution of Canal Water Adjacent to the Barapukuria Coal Mine, Dinajpur, Bangladesh
Najmun Nahar Department of Geography and Environment, Faculty of Life and Earth Science, Jagannath University, Dhaka, Bangladesh Bangladesh , Woindrila Rani Sarker Department of Geography and Environment, Faculty of Life and Earth Science, Jagannath University, Dhaka, Bangladesh Bangladesh , Md. Mohiuddin Department of Geography and Environment, Faculty of Life and Earth Science, Jagannath University, Dhaka, Bangladesh Bangladesh , Neegar Sultana Department of Geography and Environment, Faculty of Life and Earth Science, Jagannath University, Dhaka, Bangladesh Bangladesh , Farhan Ahmed Rafid Network for Information, Response, and Preparedness Activities on Disaster (NIRAPAD), Dhaka, Bangladesh Bangladesh , Arafat Hossain Network for Information, Response, and Preparedness Activities on Disaster (NIRAPAD), Dhaka, Bangladesh Bangladesh
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Background: Untreated effluent from the Barapukuria coal mine, the only operating underground coal mine in Bangladesh, enters adjacent canals used by local communities, yet no station-resolved baseline exists for the receiving canal.

Objective: This study established a pre-monsoon (March 2023) physicochemical baseline of the canal in Dinajpur, northern Bangladesh, to evaluate compliance with the Bangladesh Environment Conservation Rules (ECR) 1997 and World Health Organization (WHO) guidelines.

Methods: Five stations (W1 upstream to W5 downstream) were sampled at 200 m intervals and measured in triplicate for temperature, colour, odour, pH, dissolved oxygen (DO), electrical conductivity (EC) and total dissolved solids (TDS); data were analysed using one-way ANOVA, Tukey HSD, Pearson correlation, principal component analysis (PCA) and a weighted-arithmetic Water Quality Index (WQI).

Results: pH (7.08 ± 0.34), DO (5.16 ± 1.55 mg L-1) and TDS (430 ± 125 mg L-1) remained within limits, whereas temperature peaked at 31.7 °C, exceeding the 28 °C ECR aquatic-life limit, and EC fell to 176 µS cm-1, indicating mineral-poor water. All parameters differed among stations (p < 0.001; η2 = 0.94–0.99); PCA explained 92.1% of variance and isolated the discharge point; WQI (66.1–81.5, “Good”) deteriorated downstream.

Conclusion: The canal is chemically compliant but thermally stressed and mineral-poor, warranting industrial cooling, sedimentation control and multi-season monitoring to protect downstream aquaculture and agriculture.

Pages: 31-41

Views: 35 Downloads: 15
Integrated Sediment–Water–Biota Assessment of Petrochemical Contaminants, Partitioning and Ecological Risk in the Bonny Estuary, Niger Delta, Nigeria
Nkechi Blessing Chinedu Industrial Chemistry Department, Southern Delta University, Delta State, Nigeria Nigeria , Ernest Nwanwunweneonye Orhuebor Industrial Chemistry Department, Southern Delta University, Delta State, Nigeria Nigeria , Adedoyin Bankole Environmental Management and Toxicology, Federal University of Petroleum Resources, Delta State, Nigeria Nigeria , Gospel Effiong Isangadighi Federal University, Kogi State, Nigeria Nigeria , Ubong Bernard Essien African Centre of Excellence in Public Health and Toxicological Research, University of Port Harcourt, Rivers State, Nigeria Nigeria , Goodness Effiong Isangadighi Akwa Ibom State University, Akwa Ibom State, Nigeria Nigeria , Jessica Gospel Isangadighi Department of Chemistry, Faculty of Physical Sciences, University of Uyo, Akwa Ibom State, Nigeria Nigeria
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Background: Petroleum-derived contaminants threaten tropical estuarine ecosystems through their persistence, bioavailability and toxicity, yet integrated multi-compartment evidence remains scarce for the Niger Delta.

Objective: This study assessed petrochemical contaminants across the sediment–water–biota continuum of the Bonny Estuary, Rivers State, Nigeria, characterising their occurrence, sediment–water partitioning, bioaccumulation, ecotoxicological responses and ecological and human-health risks.

Methods: Surface sediments, overlying waters and oysters (Crassostrea sp.) were sampled in the wet and dry seasons at eight stations spanning high-impact (B1–B3), mid-impact (B4–B6) and reference (R1–R2) zones, and analysed for 16 priority polycyclic aromatic hydrocarbons (PAHs), total petroleum hydrocarbons (TPH) and trace metals by GC–MS, GC–FID and ICP–MS, with biomarker, acute-toxicity and risk-index analysis (ANOVA, PCA and pollution indices).

Results: A strong contamination gradient was observed: sediment ΣPAHs reached 7.18 mg kg⁻¹ and TPH 536 mg kg⁻¹ at B3 versus 0.54 and 62 mg kg⁻¹ at reference sites, with petroleum-tracer metals dominated by V (134), Cr (103) and Ni (74.6 mg kg⁻¹). Differences among stations were highly significant (ΣPAHs F=103.08, df=7,40, p<0.001, η²=0.947), and ΣPAHs correlated with organic carbon (r=0.90, p<0.001). Organic-carbon-normalised partition coefficients reached 185,118 L kg⁻¹ and oyster bioconcentration factors 1,686 L kg⁻¹, accompanied by elevated oxidative stress (MDA 8.6 nmol mg⁻¹) and genotoxicity (DNA tail moment 3.8); the Hakanson ecological risk index peaked at 209 and child seafood cancer risk approached 9.3×10⁻⁵.

Conclusion: The Bonny Estuary exhibits pronounced petrochemical pollution, bioaccumulation and biological impairment, requiring NESREA-aligned monitoring, sediment-quality management and mangrove restoration.

Pages: 42-53

Views: 25 Downloads: 9
Substrate Optimisation in a Free Water Surface Constructed Wetland for Landfill-Leachate River Water Treatment, Penjemuran River, Indonesia
Puteri Kusuma Wardhani Department of Civil Engineering, Faculty of Engineering, Universitas Sriwijaya, Inderalaya, Indonesia Indonesia , Nyimas Septi Rika Putri Department of Civil Engineering, Faculty of Engineering, Universitas Sriwijaya, Inderalaya, Indonesia Indonesia , Tamara Nurilah Safitri Undergraduate Student, Department of Civil Engineering, Faculty of Engineering, Universitas Sriwijaya, Inderalaya, Indonesia Indonesia
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Background: The Penjemuran River in Sukarami District, Palembang, is polluted by leachate from the adjacent Sukawinatan Landfill, degrading a fishery-supporting watercourse; substrate optimisation of constructed wetlands for landfill-impacted tropical rivers remains under-studied.

Objective: To optimise the substrate of a laboratory-scale Free Water Surface (FWS) constructed wetland for maximal pollutant removal from the Penjemuran River.

Methods: A 60×30×50 cm FWS reactor (20 cm substrate, 30 cm water column) planted with Echinodorus palaefolius (4 plants m⁻²; 24-h HRT) was tested with sand–gravel, zeolite and biochar. BOD, COD, TSS, ammonia and pH were measured by SNI methods against Class II limits (PP 22/2021) and analysed by one-way ANOVA, Tukey HSD, Pearson correlation, PCA and pollution indices (α = 0.05).

Results: Substrate effects were highly significant for every parameter (p ≤ 0.001; η² = 0.92–0.99). Sand–gravel best removed BOD (89.4%), zeolite best removed COD (81.9%) and TSS (75.0%), and biochar best removed ammonia (83.2%; effluent 0.099 mg/L). BOD and ammonia removal were inversely correlated (r = −0.93), and PC1–PC2 explained 98.6% of the variance. The Pollution Index reached compliance only when adsorptive media were combined.

Conclusion: No single medium met all Class II limits; a stratified biochar–zeolite–sand–gravel field-scale system (5×1.5×0.5 m, 1 m³ day⁻¹, IDR 45,414,703) is recommended for rehabilitating landfill-impacted rivers and safeguarding community fisheries.

Pages: 54-64

Views: 14 Downloads: 6
High-Resolution Single-Beam Bathymetry and IHO S-44 Uncertainty Benchmarking for Damaged-Pile Validation at Bullnose Jetty, Lagos, Nigeria
Alfred Sunday Alademomi Department of Surveying and Geoinformatics, Faculty of Engineering, University of Lagos, Lagos State, Nigeria/Centre for Multidisciplinary Research and Innovation, Abuja, Nigeria Nigeria , Joseph Olayemi Odumosu Department of Geomatics, Faculty of Environmental Sciences, University of Benin, Edo State, Nigeria Nigeria , Stephen Olushola Oladosu Department of Geomatics, Faculty of Environmental Sciences, University of Benin, Edo State, Nigeria Nigeria
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Background: Coastal port infrastructure operates in dynamic tidal environments where seabed change threatens structural safety, yet high-resolution, standard-benchmarked bathymetric validation of damaged and replacement piles is scarce for West-African ports.

Objective: To characterise seabed conditions and validate proposed replacement piles at Bullnose Jetty, Apapa Port Complex, Lagos Lagoon, Nigeria, ahead of piling and repair.

Methods: A single-beam echo-sounder with RTK-GNSS and 10-minute tidal reduction produced a 0.1-m grid, interpolated by kriging (Surfer 16). The survey polygon was stratified into four hydrographic sub-zones (n = 108 nodes); six parameters were analysed by one-way ANOVA with Tukey HSD, Pearson correlation, multiple regression and PCA, and benchmarked against IHO S-44 (Ed. 6.0.0).

Results: Corrected depths ranged 10.1–13.2 m and differed significantly among zones (11.66±0.86 m; F(3,104)=131.0, p<0.001, η²=0.79), deepening from the quay apron (10.65±0.35 m) to the central channel (12.76±0.42 m). Achieved total vertical uncertainty (0.23–0.27 m, k=2) met IHO Order 1a everywhere and Special Order in sheltered zones, and was governed by roughness and depth (R²=0.82). PCA captured 86.3% of variance in two components. No obstructions occurred at piles A-38/39/40; the broken pile P39A was mapped on the seabed.

Conclusion: The reproducible, IHO-benchmarked protocol confirms safe pile placement and supports routine hydrographic monitoring of Lagos-area port infrastructure.

Pages: 65-74

Views: 18 Downloads: 6
Valorising Defatted Soy Flour into High-Moisture Textured Vegetable Protein by Single-Screw Cooking Extrusion
Domas Galih Patria Department of Food Science, College of Agriculture, National Pingtung University of Science and Technology, Pingtung, Taiwan/Department of Agro-Industrial Technology, Faculty of Agro-Industrial and Biosystem Technology, Universitas Brawijaya, Malang, Indonesia Taiwan, Province of China , Cindytia Selvina Bernas Department of Food Science, College of Agriculture, National Pingtung University of Science and Technology, Pingtung, Taiwan Taiwan, Province of China , Annur Ahadi Abdillah Study Program of Fish Processing, Faculty of Fisheries and Marine, Universitas Airlangga, Surabaya, Indonesia/Research Group of Post-harvest, Processing Technology and Bioproducts, Faculty of Fisheries and Marine, Universitas Airlangga, Surabaya, Indonesia Indonesia , Dodyk Pranowo Department of Agro-Industrial Technology, Faculty of Agro-Industrial and Biosystem Technology, Universitas Brawijaya, Malang, Indonesia Indonesia , Jenshinn Lin Department of Food Science, College of Agriculture, National Pingtung University of Science and Technology, Pingtung, Taiwan Taiwan, Province of China
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Background: Conventional meat production is approaching ecological limits, motivating sustainable, circular-economy protein alternatives. Defatted soy flour (DSF), a low-value co-product of soybean oil extraction, is protein-dense, fibre-rich and abundant in Indonesia, yet its use in high-moisture textured vegetable protein (HM-TVP) is unexplored.

Objective: To valorise DSF into HM-TVP by single-screw cooking extrusion and determine how substitution ratio and screw speed govern its functional, proximate, textural, colour, microstructural, isoflavone and sensory quality.

Methods: Three DSF:pea-protein-isolate (PPI) ratios (0:70, 15:55, 30:40) and three screw speeds (30, 40, 50 rpm) were examined in a 3×3 factorial design (n=3) at the Food Pilot Plant, National Pingtung University of Science and Technology (NPUST), Pingtung, Taiwan. Water absorption/solubility indices, proximate composition, texture-profile analysis, HunterLab colour, SEM microstructure, RP-C18 HPLC isoflavones and hedonic scores were determined, and data were analysed by two-way ANOVA with Tukey HSD, effect sizes (η²), Pearson correlation and principal component analysis.

Results: DSF substitution dominated most responses (partial η²=0.57–0.99, p<0.001). Raising DSF from 0 to 30% increased water absorption index (1.92→3.43 g/g), crude fibre (2.79→6.40%), hardness (25.7→56.9 N) and chewiness, and shifted the isoflavone profile toward higher glycoside (genistin up to 1741 µg/g) and bioavailable aglycone concentrations, while reducing crude protein (77.1→63.3%), crude fat (1.86→0.93%), lightness (L* 78.1→72.4) and springiness. Higher screw speed raised water-soluble index and soluble-fibre release but lowered hardness and browning. Crude protein of all extrudates (63–77%) far exceeded the ≥50% benchmark for texturised soy products, and the 15% DSF blend at 40 rpm (D15S40) achieved the highest overall acceptability (4.10/5).

Conclusion: DSF can partially replace pea/soy protein isolates in sustainable, phytonutrient-enriched meat analogues at lower cost.

Pages: 75-84

Views: 11 Downloads: 12

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ANNOUNCEMENT

New Publication Schedule — Effective 2026

Beginning in 2026, Sriwijaya Journal of Environment (SJE) is published three times a year. New issues are released in March, July, and November. Manuscripts are welcome year-round through the journal’s online submission system.

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Sriwijaya Journal of Environment

About the Journal

Cited by Scopus-indexed research worldwide

Current Issue

Articles

Parasite Assemblage, Prevalence and Zoonotic Potential in the Spotfin Bigeye Priacanthus tayenus from the South China Sea, East-Coast Peninsular Malaysia

Fabrication and Performance Evaluation of Rice-Straw Lignocellulosic Filters for Particulate Matter Removal from Air

Spatial Non-Compliance and Ecosystem Risk of Service-Station Proliferation in a Densely Populated Tropical Megacity District: A GIS-Based Assessment of Funa, Kinshasa (DR Congo)

Physicochemical Baseline and Thermal Pollution of Canal Water Adjacent to the Barapukuria Coal Mine, Dinajpur, Bangladesh

Integrated Sediment–Water–Biota Assessment of Petrochemical Contaminants, Partitioning and Ecological Risk in the Bonny Estuary, Niger Delta, Nigeria

Substrate Optimisation in a Free Water Surface Constructed Wetland for Landfill-Leachate River Water Treatment, Penjemuran River, Indonesia

High-Resolution Single-Beam Bathymetry and IHO S-44 Uncertainty Benchmarking for Damaged-Pile Validation at Bullnose Jetty, Lagos, Nigeria

Valorising Defatted Soy Flour into High-Moisture Textured Vegetable Protein by Single-Screw Cooking Extrusion

New Publication Schedule — Effective 2026

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