Water Science and Technology最新文献_第10页

AnCMBR-AFB-integrated process for the treatment of high nitrogen and phosphorus wastewater. 用于处理高氮和高磷废水的 CMBR-AFB 一体化工艺。

IF 2.7 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-01-01 DOI: 10.2166/wst.2023.426

Huayu Xu, Shoubin Zhang, Fengchao Wang, Kang Xie, Guicai Liu, Yutian Liu

{"title":"AnCMBR-AFB-integrated process for the treatment of high nitrogen and phosphorus wastewater.","authors":"Huayu Xu, Shoubin Zhang, Fengchao Wang, Kang Xie, Guicai Liu, Yutian Liu","doi":"10.2166/wst.2023.426","DOIUrl":"10.2166/wst.2023.426","url":null,"abstract":"Improving the nitrogen and phosphorus removal rates and efficiently controlling membrane fouling are the keys to fully exploiting the applicability of anaerobic membrane bioreactor (AnMBR) process in high-concentration wastewater treatment. To that purpose, an integrated reactor composed of an anaerobic ceramic membrane bioreactor and N anaerobic fluidized bed (AnCMBR-AFB) was built and pollutant removal efficiency, nitrogen and phosphorus recovery characteristics, and membrane pollution features of this integrated reactor were investigated. The results revealed that the integrated reactor had good pollutant removal efficiency, with turbidity, chromaticity, and UV254 average values of the effluent being 0.470 NTU, 0.011 A, and 0.057 cm-1, respectively, and the average CODCr removal rate was 80%. The nitrogen and phosphorus recoveries were significantly higher than the nitrogen and phosphorus removal rates of conventional AnMBR at 23.20 ± 1.17% and 43.34 ± 1.54%, respectively. Microscopic analysis revealed the formation of magnesium ammonium phosphate (MAP) crystals on the carrier's surface, and friction between the carrier and the membrane surface could delay membrane fouling while allowing the contaminated membrane surface to retain significant roughness. Membrane fouling was mostly brought on by amides and saturated hydrocarbons, and inorganic metal ions also played a role to some extent.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"89 1","pages":"199-211"},"PeriodicalIF":2.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/wst_2023_426/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139432983","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Performance of three anion-exchange membranes in fluoride ions removal by electrodialysis. 通过电渗析去除氟离子的三种阴离子交换膜的性能。

IF 2.7 4区环境科学与生态学

Water Science and Technology Pub Date : 2024-01-01 DOI: 10.2166/wst.2023.423

Fatima Zahra Addar, Idrisse Mohamed, Sarra Kitanou, Mustapha Tahaikt, Azzedine Elmidaoui, Mohamed Taky

{"title":"Performance of three anion-exchange membranes in fluoride ions removal by electrodialysis.","authors":"Fatima Zahra Addar, Idrisse Mohamed, Sarra Kitanou, Mustapha Tahaikt, Azzedine Elmidaoui, Mohamed Taky","doi":"10.2166/wst.2023.423","DOIUrl":"10.2166/wst.2023.423","url":null,"abstract":"The performance of three anion-exchange membranes (AEMs) in the fluoride ions reduction by electrodialysis (ED) is performed on real and synthetic water. The electric potential method measures the potential difference (PD) between two synthetic anion solutions separated by ACS, AFN and AXE membranes. The selectivity of these three AEMs coupled with the membrane CMX, is a cation-exchange membrane (CEM) towards different ions. The removal rate is influenced by the thickness of the polarization layer (PL) which reduces the material transfer and provides an additional barrier. The greater the thickness δ of the PL, the longer the passage time and consequently the removal rate of anions is small. Using the unstirred layer model, δ for each ion will be determined. According to the potential measurement method, none of the tested AEMs are selective to fluoride ions and the order of selectivity is as follows: AFN> AXE> ACS. Best membrane couple selected for fluoride ion removal is ACS/CMX and ion selectivity follows the order: Cl-> NO-3>F-> HCO-3> SO42-. For ACS membrane, both the demineralization rate (DR) and δ of fluoride ions are influenced by the initial concentration of the co-ion according to the following order: NO-3> Cl-> HCO-3> SO2-4.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"89 1","pages":"132-145"},"PeriodicalIF":2.7,"publicationDate":"2024-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/wst_2023_423/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139432990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How do aeration mode and influent carbon/nitrogen ratio affect pollutant removal, gas emission, functional genes and bacterial community in subsurface wastewater infiltration systems? 曝气模式和进水碳氮比如何影响地下污水渗透系统中的污染物去除、气体排放、功能基因和细菌群落？

IF 2.7 4区环境科学与生态学

Water Science and Technology Pub Date : 2023-12-01 DOI: 10.2166/wst.2023.383

Lei Zhang, Zhixi Cao, Bingqian Yan, Ziqi Li, Jing Pan, Linlin Fan

{"title":"How do aeration mode and influent carbon/nitrogen ratio affect pollutant removal, gas emission, functional genes and bacterial community in subsurface wastewater infiltration systems?","authors":"Lei Zhang, Zhixi Cao, Bingqian Yan, Ziqi Li, Jing Pan, Linlin Fan","doi":"10.2166/wst.2023.383","DOIUrl":"https://doi.org/10.2166/wst.2023.383","url":null,"abstract":"This study investigated the influences of aeration mode and influent carbon/nitrogen ratio on matrix oxygen concentration, pollutant removal, greenhouse gas emission, functional gene abundances and bacterial community in subsurface wastewater infiltration systems (SWISs). Intermittent or continuous aeration enhanced oxygen supply at 0.6 m depth in the matrix, which improved organics removal, nitrogen removal, the abundances of bacterial 16S rRNA, amoA, nxrA, narG, napA, nirK, nirS, norB, nosZ genes, bacterial community Alpha diversity, the relative abundances of Actinobacteria at 0.6 m depth, the relative abundances of Chloroflexi, Gemmatimonadetes, Bacteroidetes and Firmicutes at 0.9 and 1.2 m depth and reduced CH4 and N2O conversion efficiencies, the abundance of mcrA gene with carbon/nitrogen ratio of 12 and 16 compared with non-aeration. Increased carbon/nitrogen ratio resulted in higher TN removal efficiencies and lower CH4 and N2O conversion efficiencies in aeration SWISs than those in non-aeration SWIS. Intermittent aeration SWIS obtained high removal efficiencies of 83.2, 85.4 and 90.8% for TN, NH4+ -N and COD and low conversion efficiency of 0.21 and 0.65% for N2O and CH4 with optimal carbon/nitrogen ratio of 12. However, high TN (82.6%), NH4+ -N (84.9%) and COD (92.2%) removal efficiencies and low CH4 (0.67%) and N2O (0.23%) conversion efficiencies were achieved in continuous aeration SWIS with carbon/nitrogen ratio of 16.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"88 11","pages":"2793-2808"},"PeriodicalIF":2.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/wst_2023_383/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138810975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The porous structure induced heterogeneous and localized failure of the biofilm in microfluidic channels. 多孔结构导致生物膜在微流体通道中发生异质性局部破坏。

IF 2.7 4区环境科学与生态学

Water Science and Technology Pub Date : 2023-12-01 DOI: 10.2166/wst.2023.384

Yangyang Tang, Cong Tao, Zheng Zhang, Song Liu, Fulin Dong, Duohuai Zhang, Jinchang Zhang, Xiaoling Wang

{"title":"The porous structure induced heterogeneous and localized failure of the biofilm in microfluidic channels.","authors":"Yangyang Tang, Cong Tao, Zheng Zhang, Song Liu, Fulin Dong, Duohuai Zhang, Jinchang Zhang, Xiaoling Wang","doi":"10.2166/wst.2023.384","DOIUrl":"10.2166/wst.2023.384","url":null,"abstract":"Understanding the mechanism of biofilm distribution and detachment is very important to effectively improve water treatment and prevent blockage in porous media. The existing research is more related to the local biofilm evolving around one or few microposts and the lack of the integral biofilm evolution in a micropost array for a longer growth period. This study combines microfluidic experiments and mathematical simulations to study the distribution and detachment of biofilm in porous media. Microfluidic chips with an array of microposts with different sizes are designed to simulate the physical pore structure of soil. The research shows that the initial formation and distribution of biofilm are influenced by bacterial transport velocity gradients within the pore space. Bacteria prefer to aggregate areas with smaller microposts, leading to the development of biofilm in those regions. Consequently, impermeable blockage structures form in this area. By analyzing experimental images of biofilm structures at the later stages, as well as coupling fluid flow and porous medium, and the finite element simulation, we find that the biofilm detachment is correlated with the morphology and permeability (kb) (from 10-15 to 10-9 m2) of the biofilm. The simulations show that there are two modes of biofilm detachment, such as internal detachment and external erosion.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"88 12","pages":"3181-3193"},"PeriodicalIF":2.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/wst_2023_384/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139058811","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Hydrodynamic cavitation-enhanced activation of sodium percarbonate for estrogen removal. 水动力空化增强活化过碳酸钠去除雌激素。

IF 2.7 4区环境科学与生态学

Water Science and Technology Pub Date : 2023-12-01 DOI: 10.2166/wst.2023.382

Klára Odehnalová, Petra Přibilová, Eliška Maršálková, Štěpán Zezulka, František Pochylý, Pavel Rudolf, Blahoslav Maršálek

{"title":"Hydrodynamic cavitation-enhanced activation of sodium percarbonate for estrogen removal.","authors":"Klára Odehnalová, Petra Přibilová, Eliška Maršálková, Štěpán Zezulka, František Pochylý, Pavel Rudolf, Blahoslav Maršálek","doi":"10.2166/wst.2023.382","DOIUrl":"https://doi.org/10.2166/wst.2023.382","url":null,"abstract":"The present paper investigated the potential of hydrodynamic cavitation (HC) as an effective tool for activating sodium percarbonate (SPC). The method's efficiency was demonstrated by effectively removing estrogens, which are pollutants that have adverse impacts on aquatic ecosystems. The effects of the SPC concentration, temperature of solution, and cavitation time were evaluated. After SPC/HC treatment, the removal of estrogens was monitored by liquid chromatography-tandem mass spectrometry (LC -MS/MS). Already after 4 s of treatment and 24 h of reaction time, more than 97% of estrogens (initial concentration of 300 ng/L) were removed. The effect of post-treatment time is not considered in several papers, even though it seems to be crucial and is discussed here. The results were supported by the values of degradation rate constants, which fit the pseudo-first-order kinetic model. We also verified that HC alone was not effective for estrogen removal under the selected conditions. The sustainability of the SPC/HC system was evaluated based on electric energy per order calculation. The combination of SPC and HC is a promising approach for rapidly degrading micropollutants such as estrogenic compounds without the need for additional technological steps, such as pH or temperature adjustment.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"88 11","pages":"2905-2916"},"PeriodicalIF":2.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/wst_2023_382/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138810979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A new evaluation framework for the assessment of wastewater heat recovery potential coupled with wastewater reuse. 用于评估废水热回收潜力和废水再利用的新评估框架。

IF 2.7 4区环境科学与生态学

Water Science and Technology Pub Date : 2023-12-01 DOI: 10.2166/wst.2023.380

Eza Ramadhan, Jeill Oh

{"title":"A new evaluation framework for the assessment of wastewater heat recovery potential coupled with wastewater reuse.","authors":"Eza Ramadhan, Jeill Oh","doi":"10.2166/wst.2023.380","DOIUrl":"https://doi.org/10.2166/wst.2023.380","url":null,"abstract":"The integration of wastewater heat recovery (WWHR) and wastewater reuse offers a numerous advantage, making its application possible in various sectors. Nevertheless, this concept faced challenges to the identification of appropriate location. Existing research lacks comprehensive evaluation methods that encompass a various factor for effective decision-making. This study introduces a new evaluation framework that involves different aspects, including thermal energy potential and spatial distribution analysis. The novelty of this research lies in its unique focus on the combination of WWHR and wastewater reuse. Moreover, it introduces a structured evaluation framework that considers multiple criteria and expert opinions, enhancing decision-making precision. Multi-criteria decision analysis (MCDA) was applied to select assessment criteria, which were categorized into three aspects: water-energy supplier, water-energy consumers, and water-energy station. The relative importance of criteria was determined using the analytical hierarchical process (AHP). The results of the AHP highlight significance of factors: treated wastewater flow rate; treated wastewater temperature; water-energy supply distance, and type of water-energy consumer. These factors were assigned weight values of 0.297, 0.186, 0.123, and 0.096, respectively. It is emphasizing their influence in the decision-making process that potential locations depend on the water-energy supplier and water-energy consumer as supply and demand sources.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"88 11","pages":"3024-3043"},"PeriodicalIF":2.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/wst_2023_380/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138810916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Growth of microalgae adapted to high-light temperature conditions in different types of wastewater. 不同类型废水中适应高光照温度条件的微藻的生长。

IF 2.7 4区环境科学与生态学

Water Science and Technology Pub Date : 2023-12-01 DOI: 10.2166/wst.2023.381

Hussein Abdel-Shafy, Reda Moghazy, Mona Mansour, Martin Kerner

{"title":"Growth of microalgae adapted to high-light temperature conditions in different types of wastewater.","authors":"Hussein Abdel-Shafy, Reda Moghazy, Mona Mansour, Martin Kerner","doi":"10.2166/wst.2023.381","DOIUrl":"10.2166/wst.2023.381","url":null,"abstract":"To obtain microalgae strains adapted to wastewater in the Mediterranean region, microalgae present in the Nile River were cultivated at both high-light temperature (HLT) and low-light temperature (LLT) conditions. It was found that the species which became dominant under HLT was chlorophyta of the genus Scenedesmus. In contrast, under LLT, bacillariophyta became dominant. The microalgae strain (Scenedesmus arcuatus) was subsequently isolated and cultivated in different types of primary treated wastewater under HLT and LLT conditions. The different types of primary treated wastewater were black water (BW), grey water (GW), and sewage water (SW). Growth rates reached during the exponential phase at HLT using GW, BW, and SW were between 0.38 and 0.4 (day-1). At LLT, 1.5-2.7 folds of lower growth rates were determined due to limitation by CO2. Removal of COD and inorganic N and P from sewage wastewater reached up to 88, 96, and 100%, respectively. Results thus indicate that microalgae adapted to the climate conditions can be efficiently used for COD removal and nutrient recovery from wastewater in the Mediterranean.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"88 12","pages":"3084-3094"},"PeriodicalIF":2.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/wst_2023_381/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139058808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Distribution pattern of dissolved organic matter in pore water of sediments from three typical areas of western Lake Taihu and its environmental implications. 西太湖三个典型区域沉积物孔隙水中溶解有机物的分布模式及其环境意义

IF 2.7 4区环境科学与生态学

Water Science and Technology Pub Date : 2023-12-01 DOI: 10.2166/wst.2023.364

Zhichun Li, Songjun Wu, Hao Yu, Huili Qiu, Quanliang Jiang, Yang Deng, Herong Gui, Guoxiang Wang, Xiaoguang Xu

{"title":"Distribution pattern of dissolved organic matter in pore water of sediments from three typical areas of western Lake Taihu and its environmental implications.","authors":"Zhichun Li, Songjun Wu, Hao Yu, Huili Qiu, Quanliang Jiang, Yang Deng, Herong Gui, Guoxiang Wang, Xiaoguang Xu","doi":"10.2166/wst.2023.364","DOIUrl":"https://doi.org/10.2166/wst.2023.364","url":null,"abstract":"The migration, transformation, and accumulation of dissolved organic matter (DOM) in pore water of sediment cores play a pivotal role in lacustrine carbon cycling. In order to understand the dynamics of DOM in the sediments of large shallow eutrophic lakes, we examined the vertical profiles of DOM and the benthic fluxes of dissolved organic carbon (DOC) in sediment cores located in algae accumulated, dredged, and central areas of eutrophic Lake Taihu, China. Optical properties showed the significant influence of terrestrial inputs on the DOM components of pore water in the algae accumulated area but an abundant accumulation of autochthonous DOM in the central area. The benthic fluxes of DOC ranging from -458.2 to -139.4 mg·m-2·d-1 in the algae accumulated area displayed an opposite diffusion direction to the other two areas. The flux ranges of 9.5-31.2 mg·m-2·d-1 in the dredged area and 14.6-48.0 mg·m-2·d-1 in the central area were relatively smaller than those in the previously reported lake ecosystems with low trophic levels. Dredging engineering disturbed the pre-dredging distribution patterns of DOM in sediment cores. The deposition, accumulation, and transformation of massive algae scums in eutrophic lakes probably promoted the humification degree of sediments.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"88 11","pages":"2733-2750"},"PeriodicalIF":2.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/wst_2023_364/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138810946","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Inflow and infiltration assessment of a prototype sanitary sewer network in a coastal city in China. 中国沿海城市原型卫生污水管网的流入和渗透评估。

IF 2.7 4区环境科学与生态学

Water Science and Technology Pub Date : 2023-12-01 DOI: 10.2166/wst.2023.386

Licheng Ye, Yu Qian, David Z Zhu, Biao Huang

{"title":"Inflow and infiltration assessment of a prototype sanitary sewer network in a coastal city in China.","authors":"Licheng Ye, Yu Qian, David Z Zhu, Biao Huang","doi":"10.2166/wst.2023.386","DOIUrl":"https://doi.org/10.2166/wst.2023.386","url":null,"abstract":"A 16-month monitoring program was conducted on a prototype sanitary system in a coastal city in China. The groundwater infiltration (GWI) on dry weather days and the rain-derived inflow and infiltration (RDII) on wet weather days were quantified and analyzed. The proportion of monthly averaged GWI to total flow can be as high as 70% during the observation period mainly due to the high groundwater level. The results also show that the ratio of RDII volume to total rainfall volume (defined as R-value) reaches a limited value of approximately 10% for the studied system when the total rainfall depth increases. A reference indicator Rlim for the limited R-value was proposed for assessing the conditions of sewer systems in terms of RDII. The Rlim value depends on local sewer conditions and in general, a lower Rlim value represents a better performance on RDII and vice versa. This study enriches the case studies on the performance of a specific sanitary sewer system on inflow and infiltration in a typical coastal city with exceptionally high groundwater levels, excess rainfall events in the monitoring season and possible typhoon events, which addresses the unique locational and hydrological properties of a representative coastal city.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"88 11","pages":"2940-2954"},"PeriodicalIF":2.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/wst_2023_386/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138810981","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alleviating sample imbalance in water quality assessment using the VAE-WGAN-GP model. 利用 VAE-WGAN-GP 模型缓解水质评估中的样本不平衡问题。

IF 2.7 4区环境科学与生态学

Water Science and Technology Pub Date : 2023-12-01 DOI: 10.2166/wst.2023.373

Jingbin Xu, Degang Xu, Kun Wan, Ying Zhang

{"title":"Alleviating sample imbalance in water quality assessment using the VAE-WGAN-GP model.","authors":"Jingbin Xu, Degang Xu, Kun Wan, Ying Zhang","doi":"10.2166/wst.2023.373","DOIUrl":"https://doi.org/10.2166/wst.2023.373","url":null,"abstract":"Water resources are essential for sustaining human life and promoting sustainable development. However, rapid urbanization and industrialization have resulted in a decline in freshwater availability. Effective prevention and control of water pollution are essential for ecological balance and human well-being. Water quality assessment is crucial for monitoring and managing water resources. Existing machine learning-based assessment methods tend to classify the results into the majority class, leading to inaccuracies in the outcomes due to the prevalent issue of imbalanced class sample distribution in practical scenarios. To tackle the issue, we propose a novel approach that utilizes the VAE-WGAN-GP model. The VAE-WGAN-GP model combines the encoding and decoding mechanisms of VAE with the adversarial learning of GAN. It generates synthetic samples that closely resemble real samples, effectively compensating data of the scarcity category in water quality evaluation. Our contributions include (1) introducing a deep generative model to alleviate the issue of imbalanced category samples in water quality assessment, (2) demonstrating the faster convergence speed and improved potential distribution learning ability of the proposed VAE-WGAN-GP model, (3) introducing the compensation degree concept and conducting comprehensive compensation experiments, resulting in a 9.7% increase in the accuracy of water quality assessment for multi-classification imbalance samples.","PeriodicalId":23653,"journal":{"name":"Water Science and Technology","volume":"88 11","pages":"2762-2778"},"PeriodicalIF":2.7,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/wst_2023_373/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138810918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0