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Journal of Water and Environment Technology
Scopus
ISSN 1348-2165 · Japan Society on Water Environment · 183 artikel di indeks
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Artikel Jurnal
Adsorptive Treatment of Fiberboard Wastewater Using Activated Carbon Synthesized from Oil Palm Petioles
The fiberboard industry generates significant amounts of wastewater laden with heavy metals and organic pollutants, necessitating the development of effective and sustainable treatment solutions. This study investigates the physicochemical characteristics of wastewater from fiberboard processing…
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Artikel Jurnal
Influence of Environmental Water on the Growth Phases of Freshwater Raphidophytes and Their Disinfection Byproducts
Freshwater raphidophytes occasionally proliferate and release high concentrations of trichloroacetic acid (TCAA) precursors into drinking water sources, which have been identified as phenolic glycosides. However, the environmental factors driving the production of these precursors remain unclear…
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Artikel Jurnal
Field Survey on Microbial Contamination Associated with Waterborne Diseases in a Low-income Settlement of Lusaka, Zambia
Many children suffer from diarrhea in low-income settlements. However, little information is available on the microbial contamination related to waterborne diseases. Microbial contamination of five environmental media (groundwater, tap water, stored household water, drinking cups, dish sponges) was…
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Artikel Jurnal
Water Flows, Infrastructure, and Inequalities: A Political Industrial Ecology of an India Small Touristic Town in 2024
The complex interplay between urban water flows, infrastructure, and socio-economic inequalities in small and medium-sized urban centers remains understudied, primarily due to limitations in data availability and methodological challenges. Many such towns have tourist attractions and receive…
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Artikel Jurnal
Spatial and Temporal Variations in Contribution of Benthic Diatoms and Terrestrial Plants to Food Source of Benthic Animals in Imazu Tidal Flat
This study investigated the spatiotemporal dynamics of benthic diatoms and terrestrial plants as food sources for benthic animals in Imazu Tidal Flat, using fatty acid biomarkers and stable isotope analysis. The sediments of estuarine sites exhibited higher terrestrial fatty acids and depleted δ13C…
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Artikel Jurnal
Enhancement of Floating Velocity of Wild Microcystis by Manipulating Colony Morphology and Cell Density
The colony size expansion and the reduction of cell density of wild Microcystis were attempted to accelerate its buoyancy. Culture experiments of Microcystis exhibited that the colony size expansion was observed after 24 h preculture with higher Ca2+ concentration (1,000 mg L∁E) in medium, while…
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Artikel Jurnal
Occurrence of Antimicrobial-Resistant Escherichia coli in the Pond in Kochi Prefecture, Japan and the Influence of the Feces of Migratory Birds
The spread of antimicrobial-resistant bacteria (ARB) has become one of the major threats to human health worldwide, and migratory birds are potentially contributing to the spread of ARB in the environment. This study investigated Escherichia coli and antibiotic-resistant E. coli in Ishizuchi Pond…
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Artikel Jurnal
Effects of the Shapes and Materials of Fluidised Carriers on the Distribution and Settleability of Microalgal–bacterial Consortia for Wastewater Treatment
Microalgal–bacterial consortia (MBC) are expected to be utilised for wastewater treatment. This study investigated MBC cultivation using primary treated wastewater and various fluidised carriers based on the hypothesis that dual control of the hydraulic retention time (HRT) and carrier retention…
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Artikel Jurnal
Effect of Bamboo Biochar on Process Performance and Microbial Community Composition in Continuous Anaerobic Digestion of Liquid Dairy Biomass
The utilization of liquid dairy biomass (LDB) as an energy source has attracted growing attention, but its high organic content can hinder anaerobic digestion (AD) efficiency. This study investigated the effects of conductive materials on AD performance under high organic loading rates (OLR). After…
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Artikel Jurnal
Spatial Distribution of Atmospheric N2O Around a Full-scale Carrousel Reactor
Nitrous oxide (N2O) is a potent greenhouse gas emitted from bioreactors in sewage treatment plants. Quantifying emissions from uncovered reactors remains challenging because of methodological and operational limitations. This study aimed to characterize the three-dimensional spatial distribution of…
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Artikel Jurnal
Rapid Denitrifying Granular Sludge Formation Methods for Closed-recirculating Seawater Aquaculture System
Denitrification is an important process for water quality control in recirculating aquacultural systems. Denitrifying granular sludge reactors, such as upflow sludge blanket (USB) reactors, can achieve a high NO3∁EN removal efficiency under a short hydraulic retention time. These biological…
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Artikel Jurnal
Evidence of Declining Surface-groundwater Interaction in the Shallow Alluvial Aquifers of Mid-Gangetic Plain, India
The dynamics of surface-groundwater interaction (SGI) in the alluvial Gangetic plains are critically analyzed using multivariate statistical techniques (MST) applied to major and trace ion chemistry of river water (RW) and groundwater (GW) samples. The study reveals an unusual decline in SGI, even…
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Artikel Jurnal
Quantification of Cefotaxime-Resistant Escherichia coli and Class 1 Integron Integrase Gene as Key Indicators of Antimicrobial Resistance in Urban Wastewater in Two Cities in Japan
Antimicrobial resistance in human, veterinary, and agricultural sectors is a pressing global health threat. Wastewater surveillance is a promising approach to comprehensively evaluate the prevalence of antimicrobial-resistant bacteria and antimicrobial resistance genes in urban areas. Although…
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Artikel Jurnal
Protocol for Ammonium Isotope Analysis of Low-Concentration Environmental Water Samples
In this study, ammonium was separated from water samples using a diffusion technique and oxidized to nitrate. Nitrate was then denitrified and analyzed for isotopic values using isotope ratio mass spectrometry. Each step was carefully examined, particularly oxidation, which was conducted under a…
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Artikel Jurnal
Oxidative Degradation of Allura Red Azo Dye in Aqueous Solution Catalyzed by Nb2O5
The degradation of Allura Red azo dye using niobium pentoxide (Nb2O5) as a catalyst and hydrogen peroxide (H2O2) as an oxidant was studied in a slurry batch reactor at 30°C. The effects of H2O2 concentration (45 E80 mM), catalyst loading (0.25 E.75 wt%), and pH (3 E1) were analyzed for 2 h. The…
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Artikel Jurnal
A Modeling Framework for Predicting Controllable Nutrient Inflows to Coastal Waters: Application to Contrasting Eutrophic and Oligotrophic Systems in Osaka Bay and Harima-nada
We developed a novel modeling framework that forecasts nutrient load inputs to coastal waters at site-specific resolution by integrating demographic change, industrial activity, and operational conditions at sewage treatment plants. This framework quantifies the controllable range of nutrient…
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Artikel Jurnal
Drought Impacts on Water Quality of Boukerdane Dam, Tipaza, Algeria
Water quality in semi-arid reservoirs is vulnerable to drought, yet impacts remain poorly quantified. This study assesses meteorological drought effects on Boukerdane Dam, Tipaza, Algeria, from 2019 to 2023 using high-resolution weekly physicochemical sampling and daily volume records. Drought…
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Artikel Jurnal
Microbial Contamination and Public Health Risks of Well Water near Sanitation Facilities in Security-Challenged Areas of Katsina State, Nigeria
Shallow wells are common source of drinking water in low-resource countries; however, they are highly vulnerable to fecal contamination. Here, we assessed the microbial quality and antibiotic susceptibility patterns of enteric bacteria recovered from shallow wells situated near sanitation…
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Artikel Jurnal
Evaluating the Contributions of Multiple Nitrate Sources to Cultivated Nori (Pyropia yezoensis) in Coastal Areas of Mikawa Bay, Japan, Using Nitrogen Stable Isotope Ratio (δ15N)
This study assessed the relative contributions of selected nitrogen sources to nori cultivation in Mikawa Bay using nitrogen stable isotope ratios (δ15N) and a Bayesian isotope mixing model (MixSIAR). The analysis considered three potential nitrogen sources: Yahagi River water, sewage effluent, and…
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Artikel Jurnal
Long-term Effects of Ni(II), Co(II) and Zn(II) Limitation on the Nitrite-oxidation Activity in Continuous Tests Using PVA Gel Carriers
Nitrite-oxidizing bacteria (NOB) can be inhibited by high concentrations of heavy metals; however, trace elements (TE) are critical for their growth and sustained activity. In this first time report, the long-term impacts of limiting Ni(II), Co(II), and Zn(II) on nitrite oxidation were separately…