Water Science and Technology最新文献

Transfer learning for quantitative image analysis of biosolids. 生物固体定量图像分析的迁移学习。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2025-10-01 Epub Date: 2025-07-02 DOI: 10.2166/wst.2025.084

Sebastian Olivier Nymann Topalian, Nima Nazemzadeh, Alonso Malacara-Becerra, Seyed Soheil Mansouri, Kasper Kjellberg, Damien J Batstone, Krist V Gernaey, Xavier Flores-Alsina, Pedram Ramin

{"title":"Transfer learning for quantitative image analysis of biosolids.","authors":"Sebastian Olivier Nymann Topalian, Nima Nazemzadeh, Alonso Malacara-Becerra, Seyed Soheil Mansouri, Kasper Kjellberg, Damien J Batstone, Krist V Gernaey, Xavier Flores-Alsina, Pedram Ramin","doi":"10.2166/wst.2025.084","DOIUrl":"https://doi.org/10.2166/wst.2025.084","url":null,"abstract":"This study explores how quantitative image analysis can enhance dewatering efficiency of stabilized biosolids at a major industrial wastewater treatment plant in Northern Europe. The aim is to develop a transparent and systematic analysis workflow encompassing data integration from various sources to predict decanter organic solids recovery. During two campaigns, data were collected from operational conditions and laboratory measurements. In addition, data were collected from image analysis and generated by transfer learning techniques using a readily available online database. Partial Least Squares (PLS) and Random Forest (RF) models were tested using different combinations of data sources. The best recovery prediction was obtained using a RF model utilizing both process and laboratory data in combination with transfer learning, improving the prediction by 14% as compared to baseline prediction (using average values). In addition, clustering of segmented particle images and RF-based recovery prediction revealed a strong dependency on specific crystalline particles. In general, the RF model outperformed the PLS model in predicting recovery, although both models lack consistency in prediction across the organic solids concentration range. This study offers operators insight into factors affecting dewatering efficiency and provides a diagnostic workflow transferable to other systems with heterogeneous particle mixtures.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"92 7","pages":"931-948"},"PeriodicalIF":2.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145293864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of post-treatment on permeance and fouling of nanofiltration membrane. 后处理对纳滤膜渗透及污染的影响。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2025-10-01 Epub Date: 2025-09-17 DOI: 10.2166/wst.2025.137

Ruochen Yang, Xue Zhang, Fuzhi Li, Xuan Zhao

{"title":"Effect of post-treatment on permeance and fouling of nanofiltration membrane.","authors":"Ruochen Yang, Xue Zhang, Fuzhi Li, Xuan Zhao","doi":"10.2166/wst.2025.137","DOIUrl":"https://doi.org/10.2166/wst.2025.137","url":null,"abstract":"The effects of two post-treatments with CaCl2 and NaOH on nanofiltration (NF) membranes were investigated according to the physicochemical properties and antifouling performance. The membrane post-treated with NaOH (NF-OH-) exhibited enhanced hydrophilicity and greater negative surface charge, accompanied by collapsed nodular structures. Compared with the pristine NF membrane, NF-OH- demonstrated a 50% increase in permeance, but showed compromised separation performance, with SO42- rejection of 97.3% and Cl-/SO42- separation factor of 46. In contrast, the CaCl2-treated membrane (NF-Ca2+) displayed improved hydrophilicity with reduced negative charge and denser nodular morphology. While NF-Ca2+ achieved 25% higher permeance than the pristine membrane, it maintained comparable SO42- rejection and Cl-/SO42- separation factor. Fouling experiments using biological treatment effluent of leachate revealed that NF-OH- showed greater fouling propensity and lower cleanability than the other two membranes. This is likely due to the stronger negative charge and smoother surface morphology of the NF-OH- membrane, which promoted foulant adhesion while limiting surface turbulence. Conversely, the NF-Ca2+ membrane demonstrated superior antifouling characteristics and higher permeance recovery, attributable to its reduced negative surface charge and denser nodular morphology. These findings underscore the critical influence of surface charge and nanostructure on the filtration and antifouling behavior of NF membrane.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"92 7","pages":"1050-1062"},"PeriodicalIF":2.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145293771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CFD Simulation of DAF processing for removal microplastic in different flotation solution. 不同浮选溶液中DAF工艺去除微塑料的CFD模拟。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2025-10-01 Epub Date: 2025-09-22 DOI: 10.2166/wst.2025.140

Kwang Jun Kim, Chol Hyok Ji, Un Yong Paek, Il Song Han, Song Chol Hong

{"title":"CFD Simulation of DAF processing for removal microplastic in different flotation solution.","authors":"Kwang Jun Kim, Chol Hyok Ji, Un Yong Paek, Il Song Han, Song Chol Hong","doi":"10.2166/wst.2025.140","DOIUrl":"https://doi.org/10.2166/wst.2025.140","url":null,"abstract":"Microplastic particles floating in rivers, lakes and seawater are one of the factors that threaten human health and the environment. In this study, the process of dissolved air flotation (DAF) to remove microplastics from various wastewaters was simulated by the computational fluid dynamics (CFD) method. First, a solution with a plastic particle concentration of 0.2 g/L was injected at a flow rate of 200 mL/min. Then, a microbubble water with a water-to-microbubble volume ratio of 4:1 was injected at a flow rate of 300 mL/min and the simulated results showed that the kinematic and distribution characteristics of the plastic particles and microbubbles were in good agreement with the experimental results. Based on the simulation system to analyze the behavior of particles in flotation solutions, the flotation performance was evaluated by varying the concentration of NaCl solution from 0 to 12 g/L and the pH value of 10-2 M salt solution from 4 to 9. The calculation results showed that the flotation performance improved with increasing NaCl concentration and pH, and the concentration of NaCl had a greater effect. These results provide some basic information for designing industrial wastewater treatment processes for the removal of microplastics in wastewater.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"92 7","pages":"919-930"},"PeriodicalIF":2.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145293942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recovery of ammonium from domestic wastewater using microbial fuel cells. 微生物燃料电池回收生活废水中的氨。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2025-10-01 Epub Date: 2025-09-15 DOI: 10.2166/wst.2025.135

Peerawat Yodkamonsart, Tomohide Watanabe, Keiichi Kubota, Chai Jaturapitakkul, Wilasinee Yoochatchaval

{"title":"Recovery of ammonium from domestic wastewater using microbial fuel cells.","authors":"Peerawat Yodkamonsart, Tomohide Watanabe, Keiichi Kubota, Chai Jaturapitakkul, Wilasinee Yoochatchaval","doi":"10.2166/wst.2025.135","DOIUrl":"https://doi.org/10.2166/wst.2025.135","url":null,"abstract":"This study investigates the optimal conditions of microbial fuel cells (MFCs) for ammonium transport and chemical oxygen demand (COD) removal, and their potential for electricity generation. Batch experiments were conducted using external resistors of 1,500; 200; and 0 Ω, with synthetic domestic wastewater containing an initial NH4+ concentration of 20 mg N/L. Continuous flow experiments were also conducted to assess and compare the performance of MFC systems in terms of electricity generation, COD removal, and ammonium recovery. The results of the batch experiments showed that increasing the external resistance up to 1,500 Ω enhanced the concentration of NH4+ in the cathode chamber. Moreover, higher external resistance contributed to greater voltage stability. The continuous flow experiments revealed that electricity generation did not affect COD removal efficiency. The maximum COD removal efficiencies for the 1,500 Ω and control MFCs were 80.98 and 76.65%, respectively. The concentration of NH4+ in the cathode chamber of the 1,500 Ω MFC was higher than that of the control MFC. Struvite precipitation was used to recover ammonium from the cathode chamber in the continuous experiment. The crystallinity of the precipitate was confirmed by XRD analysis.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"92 7","pages":"983-990"},"PeriodicalIF":2.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145293739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tolerance and remediation potential of aquatic plants for copper, nickel, lead and zinc in heavy metal-contaminated waters. 水生植物对重金属污染水体中铜、镍、铅和锌的耐受性及修复潜力

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2025-10-01 Epub Date: 2025-09-30 DOI: 10.2166/wst.2025.142

Shenghui Xu, Ao Wu, Mingyang Yun, Kaiwang Liu, Junhong Li

{"title":"Tolerance and remediation potential of aquatic plants for copper, nickel, lead and zinc in heavy metal-contaminated waters.","authors":"Shenghui Xu, Ao Wu, Mingyang Yun, Kaiwang Liu, Junhong Li","doi":"10.2166/wst.2025.142","DOIUrl":"https://doi.org/10.2166/wst.2025.142","url":null,"abstract":"In the semi-arid regions of Northwest China, research on phytoremediation technology has focused predominantly on soil matrices, with few studies investigating its efficacy in removing heavy metals from aqueous solutions. Four plants were selected for formal hydroponic experiments: Iris sibirica L. (I. sibirica), Alternanthera philoxeroides (A. philoxeroides), Sedum aizoon L. (S. aizoon) and Hydrocotyle vulgaris L. (H. vulgaris). The results revealed that S. aizoon presented the highest bioaccumulation ability for Cu, whereas H. vulgaris presented the strongest bioaccumulation of Zn, Ni and Pb. S. aizoon had a maximum removal rate of 90% for Cu. The removal rate of Ni by A. philoxeroides was greater than 61%. The removal rate of Zn by H. vulgaris and S. aizoon was greater than 69%. The highest removal rate of Pb by I. sibirica was 93.96%. These plants can serve as candidate species for the phytoremediation of specific heavy metals in river or tailings pond waters in Northwest China. This study holds practical significance for the remediation of water bodies contaminated with heavy metals in the semi-arid regions of Northwest China.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"92 7","pages":"967-982"},"PeriodicalIF":2.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145293869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spatial equilibrium evaluation of water resources in the water-receiving area of the central route of the South-to-North water diversion project in Henan province. 河南南水北调中线受水区水资源空间平衡评价

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2025-10-01 Epub Date: 2025-09-26 DOI: 10.2166/wst.2025.143

Feng Li, Jiaen Du, Xin Huang, Xinyue Xu, Junyan Gao, Ziyan Luo

{"title":"Spatial equilibrium evaluation of water resources in the water-receiving area of the central route of the South-to-North water diversion project in Henan province.","authors":"Feng Li, Jiaen Du, Xin Huang, Xinyue Xu, Junyan Gao, Ziyan Luo","doi":"10.2166/wst.2025.143","DOIUrl":"https://doi.org/10.2166/wst.2025.143","url":null,"abstract":"The distribution of water resources determines the pattern of economic development, making the strategic layout of China's water resources crucial. This study focuses on the water-receiving area of the South-to-North Water Diversion Project in Henan Province, addressing issues related to water resource scheduling and allocation. This paper constructs an evaluation model using the Gini coefficient and the multi-correlation coefficient method to analyse the development levels of three types of water resource matching relationships. It then employs kernel density estimation, centroid, and standard deviation ellipse models to study the spatial impact of water resources, revealing the microstructure, central tendency, and dispersion characteristics of water resource distribution. The results indicate: (1) There is a correlation between the algorithms of the Gini coefficient and relational degree. The overall spatial equilibrium of the three matching relationships differs. (2) The spatial equilibrium within the same subregion varies across different matching relationships. (3) The total water resources in the South-to-North Water Diversion area of Henan Province have steadily increased, with rapid development across regions and narrowing disparities among cities. The centroid is located in Xuchang City, and the directional characteristics of total water resources are becoming less pronounced.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"92 7","pages":"1021-1049"},"PeriodicalIF":2.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145293794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimizing regional water resources management considering ecological water demand priority for Mahaweli River watershed, Sri Lanka. 考虑生态用水需求优先的斯里兰卡Mahaweli河流域区域水资源管理优化

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2025-10-01 Epub Date: 2025-09-15 DOI: 10.2166/wst.2025.134

Li You, Mei Liu, Ye Xu, Chunming Hu

{"title":"Optimizing regional water resources management considering ecological water demand priority for Mahaweli River watershed, Sri Lanka.","authors":"Li You, Mei Liu, Ye Xu, Chunming Hu","doi":"10.2166/wst.2025.134","DOIUrl":"https://doi.org/10.2166/wst.2025.134","url":null,"abstract":"This study develops an Interval Minimax Relative Regret Analysis (IMRA) method that combines interval linear programming (ILP) with minimax relative regret analysis (MRA) techniques to address growing challenges in water resources management under climate change. The proposed IMRA framework minimizes maximum potential regret among stakeholders while integrating multidimensional considerations of climate projections, risk management, and ecosystem protection, with particular emphasis on prioritizing ecological water requirements in allocation decisions. Applied to Sri Lanka's Mahaweli River Basin, the methodology employs multi-objective optimization to reconcile competing water demands across sectors and resolve disparities among diverse water users, systematically evaluating irrigation benefits and associated economic losses across 23 regions with varying crop patterns. The investigation reveals critical interactions between water resources and key socioeconomic and ecological determinants, enabling scientifically-grounded regulation and efficient utilization of water sources. Through absolute and relative regret criteria, the IMRA model identifies optimal solutions, determining an ideal irrigation water supply range of [174.09, 216.62] 106 m3. Results demonstrate substantial ecological water demands in Matale and Pussellawa, constituting 36 and 40% of total regional water needs respectively under varying supply conditions, while maintaining allocation efficiency and ecosystem integrity. This study provides a robust framework for sustainable water management amidst environmental uncertainties.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"92 7","pages":"991-1020"},"PeriodicalIF":2.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145293729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Model predictive control of anaerobic digestion processes using a long short-term memory network predictor. 模型预测控制厌氧消化过程使用长短期记忆网络预测器。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2025-10-01 Epub Date: 2025-09-17 DOI: 10.2166/wst.2025.139

Andrés Pino Santana, Santiago Garcia-Gen, Laurent Dewasme, Alain Vande Wouwer

{"title":"Model predictive control of anaerobic digestion processes using a long short-term memory network predictor.","authors":"Andrés Pino Santana, Santiago Garcia-Gen, Laurent Dewasme, Alain Vande Wouwer","doi":"10.2166/wst.2025.139","DOIUrl":"https://doi.org/10.2166/wst.2025.139","url":null,"abstract":"This article presents an evaluation of a model predictive control (MPC) strategy that employs long short-term memory (LSTM) networks as internal predictive models for anaerobic digestion (AD) processes. The primary objective was to develop and validate a data-driven control approach utilizing readily available online measurements. The strategy was tested in two simulated AD environments: the simplified Anaerobic Model No. 2 (AM2) and the detailed Anaerobic Digestion Model No. 1 (ADM1). LSTM networks were effectively trained to predict methane flow rates from simulated data, including stochastic disturbances. The integrated LSTM-MPC framework demonstrated robust methane flow rate setpoint tracking and ensured process stability in both environments, even amidst nonlinear operating conditions and influent disturbances. Importantly, the computational requirements remained feasible for real-time applications in these typically slow processes. The findings suggest that the LSTM-MPC strategy is a promising and computationally efficient alternative for controlling AD processes, providing a practical solution compared with traditional mechanistic model-based approaches that often rely on more complex and less accessible measurements.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"92 7","pages":"1063-1076"},"PeriodicalIF":2.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145293750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of sediment deposited in a curtained stormwater storage and treatment facility located in the receiving water. 位于接收水的幕式雨水储存和处理设施中沉积物的特征。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2025-10-01 Epub Date: 2025-10-03 DOI: 10.2166/wst.2025.144

Haoyu Wei, Snezana Gavric, Annelie Hedström, Mehwish Taneez, Jiechen Wu, Jiri Marsalek, Maria Viklander

{"title":"Characteristics of sediment deposited in a curtained stormwater storage and treatment facility located in the receiving water.","authors":"Haoyu Wei, Snezana Gavric, Annelie Hedström, Mehwish Taneez, Jiechen Wu, Jiri Marsalek, Maria Viklander","doi":"10.2166/wst.2025.144","DOIUrl":"https://doi.org/10.2166/wst.2025.144","url":null,"abstract":"A curtained stormwater storage and treatment facility was constructed in Lake Storsjön (Sweden) to treat urban stormwater runoff discharges. Over two and a half years, sediments were sampled four times across four facility zones (from inlet to outlet) in two depths to inform facility operation and polluted sediment management. Sediments were analysed for particle size distribution, metals, polycyclic aromatic hydrocarbons, and organic matter content to assess the spatial distribution of deposited sediment characteristics. Finer sediments (<0.016 mm) prevailed near the outlet, with a higher presence of fine particles in the deeper layer (10-20 cm). Substantial variations in chemical concentrations were observed, differing by up to three orders of magnitude. Higher concentrations were consistently found in the inlet zone and deeper layers (10-20 cm depth) throughout the sampling program. Combined horizontal and vertical distributions of sediment characteristics indicated a predominance of historical deposits in the sediments collected. Frequent exceedances of Predicted No-Effect Concentrations of chemicals, particularly in the inlet zone, highlighted potential risks to the aquatic environment that would result from dredging activities. This underscores the importance of considering broad mitigation strategies, including the capping of contaminated sediment, to control the environmental impacts of contaminated sediments on the lake ecosystem.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"92 7","pages":"949-966"},"PeriodicalIF":2.6,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145293760","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Intensification of thermophilic anaerobic digestion of sewage sludge by thermal hydrolysis. 热水解强化污泥嗜热厌氧消化。

IF 2.6 4区环境科学与生态学

Water Science and Technology Pub Date : 2025-09-01 Epub Date: 2025-09-04 DOI: 10.2166/wst.2025.131

Anna Cardova, Pavel Jenicek, Martin Srb, Petr Sykora, Jiri Rosicky, Lise Appels

引用次数: 0