Pub Date : 2023-04-03DOI: 10.1080/1573062X.2023.2198996
Kibum Kim, Heechang Kang, Taehyeon Kim, D. T. Iseley, Jaeho Choi, J. Koo
ABSTRACT Steel is a metal, and thus, it undergoes corrosion over time. The comprehensive analysis of the factors influencing corrosion can aid in developing strategies, such as new ways to avoid corrosive environments. This study explored the factors influencing pitting corrosion in steel water pipes in South Korea between 1988–2020, using artificial neural networks. Partial dependence plots and variable importance are used to identify the degree of influence of the 12 corrosion-influencing factors. Pipe age had the highest importance and strongest influence on corrosion among the corrosion-influencing factors. Soil resistivity strongly influenced external corrosion, especially at values less than 5,000 Ω-cm, and the influence of sulfide concentration on external corrosion was also relatively strong. Water alkalinity exhibited the strongest influence on internal corrosion. This study will serve as reference data for developing corrosion depth prediction models and will contribute to understanding corrosive environments when laying new pipelines and improving existing ones.
{"title":"Influencing factors analysis for drinking water steel pipe pitting corrosion using artificial neural network","authors":"Kibum Kim, Heechang Kang, Taehyeon Kim, D. T. Iseley, Jaeho Choi, J. Koo","doi":"10.1080/1573062X.2023.2198996","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2198996","url":null,"abstract":"ABSTRACT Steel is a metal, and thus, it undergoes corrosion over time. The comprehensive analysis of the factors influencing corrosion can aid in developing strategies, such as new ways to avoid corrosive environments. This study explored the factors influencing pitting corrosion in steel water pipes in South Korea between 1988–2020, using artificial neural networks. Partial dependence plots and variable importance are used to identify the degree of influence of the 12 corrosion-influencing factors. Pipe age had the highest importance and strongest influence on corrosion among the corrosion-influencing factors. Soil resistivity strongly influenced external corrosion, especially at values less than 5,000 Ω-cm, and the influence of sulfide concentration on external corrosion was also relatively strong. Water alkalinity exhibited the strongest influence on internal corrosion. This study will serve as reference data for developing corrosion depth prediction models and will contribute to understanding corrosive environments when laying new pipelines and improving existing ones.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"550 - 563"},"PeriodicalIF":2.7,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48513764","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-03-29DOI: 10.1080/1573062X.2023.2190029
Mojtaba Barzegar Hamzekolae, M. Jalili Ghazizadeh, Mohammadreza Majdzadeh Tabatabai, I. Moslehi, Ehsan Yousefi-Khoshqalb
ABSTRACT This paper proposes a method for prioritizing sewer cleaning operations in the absence of historical data on failures. The method utilizes the Induced Ordered Weighted Averaging (IOWA) multi-criteria decision-making technique, incorporating experts' opinions to regulate subjective inferences and ascertain uncertainty. The study considers ten parameters categorized into three main focuses: structural, environmental, and operational to analyze sewer pipe conditions. As a case study, four small zones in Tehran city were prioritized using the proposed methodology. The findings reveal that (1) decision-makers' subjective priorities and evaluations do not significantly influence critical cleaning options, (2) pipe diameter is the most effective parameter for prioritizing since it allows pipes to be meaningfully categorized and compared, and (3) slope, age, depth, upstream manhole condition, and the number of connections and laterals are more important than other parameters. Overall, this study provides valuable insights into developing effective prioritization strategies for sewer cleaning operations.
{"title":"Developing a new methodology for wastewater pipes cleaning prioritization using integrating Induced Ordered Weighted Averaging and fuzzy logic methods","authors":"Mojtaba Barzegar Hamzekolae, M. Jalili Ghazizadeh, Mohammadreza Majdzadeh Tabatabai, I. Moslehi, Ehsan Yousefi-Khoshqalb","doi":"10.1080/1573062X.2023.2190029","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2190029","url":null,"abstract":"ABSTRACT This paper proposes a method for prioritizing sewer cleaning operations in the absence of historical data on failures. The method utilizes the Induced Ordered Weighted Averaging (IOWA) multi-criteria decision-making technique, incorporating experts' opinions to regulate subjective inferences and ascertain uncertainty. The study considers ten parameters categorized into three main focuses: structural, environmental, and operational to analyze sewer pipe conditions. As a case study, four small zones in Tehran city were prioritized using the proposed methodology. The findings reveal that (1) decision-makers' subjective priorities and evaluations do not significantly influence critical cleaning options, (2) pipe diameter is the most effective parameter for prioritizing since it allows pipes to be meaningfully categorized and compared, and (3) slope, age, depth, upstream manhole condition, and the number of connections and laterals are more important than other parameters. Overall, this study provides valuable insights into developing effective prioritization strategies for sewer cleaning operations.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"521 - 531"},"PeriodicalIF":2.7,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42190106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-03-27DOI: 10.1080/1573062X.2023.2190030
D. Bouziotas, S. Stofberg, J. Frijns, D. Nikolopoulos, C. Makropoulos
ABSTRACT Contrary to the ‘make-use-dispose’ linearity of conventional management, circular economy design principles have been proposed as a resource management alternative that reduces waste and promotes efficiency. These principles also find use in water management, offering an alternative against centralized models. Despite the intrinsic links between circularity and resilience, few studies have advanced the identification and discussion of linkage beyond a theoretical or conceptual level. This study presents quantitative links between circularity and resilience, by demonstrating how different circular water management strategies lead to improved resilience performance for a regional urban-rural water system. A stress-testing framework based on a water cycle model is presented, where different circular interventions are evaluated in terms of their overall resilience against future uncertainty. The results demonstrate that circular water options lead to more resilient water systems. The more circular dimensions are addressed through interventions, the more robust resilience profiles become across different water cycle domains.
{"title":"Assessing the resilience of circularity in water management: a modeling framework to redesign and stress-test regional systems under uncertainty","authors":"D. Bouziotas, S. Stofberg, J. Frijns, D. Nikolopoulos, C. Makropoulos","doi":"10.1080/1573062X.2023.2190030","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2190030","url":null,"abstract":"ABSTRACT Contrary to the ‘make-use-dispose’ linearity of conventional management, circular economy design principles have been proposed as a resource management alternative that reduces waste and promotes efficiency. These principles also find use in water management, offering an alternative against centralized models. Despite the intrinsic links between circularity and resilience, few studies have advanced the identification and discussion of linkage beyond a theoretical or conceptual level. This study presents quantitative links between circularity and resilience, by demonstrating how different circular water management strategies lead to improved resilience performance for a regional urban-rural water system. A stress-testing framework based on a water cycle model is presented, where different circular interventions are evaluated in terms of their overall resilience against future uncertainty. The results demonstrate that circular water options lead to more resilient water systems. The more circular dimensions are addressed through interventions, the more robust resilience profiles become across different water cycle domains.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"532 - 549"},"PeriodicalIF":2.7,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47445923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-03-23DOI: 10.1080/1573062x.2023.2180395
Y. Qiu, D. Schertzer, B. Tisserand, I. Tchiguirinskaia
{"title":"Spatio-temporal rainfall variability and its impacts on the hydrological response of nature-based solutions","authors":"Y. Qiu, D. Schertzer, B. Tisserand, I. Tchiguirinskaia","doi":"10.1080/1573062x.2023.2180395","DOIUrl":"https://doi.org/10.1080/1573062x.2023.2180395","url":null,"abstract":"","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"1 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60004884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-03-16DOI: 10.1080/1573062X.2023.2184701
Kriti Trivedi, M. Kapshe, V. M. Das, S. Bade
ABSTRACT In the cities of the Indo-Gangetic basin, over the years, urban residents have been relying on groundwater due to its universal availability and reliability clubbed with inadequate municipal water supply. The study aims at using groundwater pricing as a tool for groundwater management in Indian cities giving due importance to the spatial dynamics of groundwater resources. It focuses on Kanpur city, where half the city depends directly on groundwater resources for meeting their requirements, making the aquifers susceptible to low yield and facing the risk of irreversible over-exploitation in the coming future. Spatial analysis using Geographical Information System (GIS) has been carried out for economic evaluation of the resource by assessing the criticality of groundwater resources. This is further incorporated into a differential pricing structure with an aim to curb over-exploitation. We have also proposed specific pricing strategies that are better suited and easily implementable in Kanpur city.
{"title":"Groundwater pricing strategies for Indian cities - a case of Kanpur","authors":"Kriti Trivedi, M. Kapshe, V. M. Das, S. Bade","doi":"10.1080/1573062X.2023.2184701","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2184701","url":null,"abstract":"ABSTRACT In the cities of the Indo-Gangetic basin, over the years, urban residents have been relying on groundwater due to its universal availability and reliability clubbed with inadequate municipal water supply. The study aims at using groundwater pricing as a tool for groundwater management in Indian cities giving due importance to the spatial dynamics of groundwater resources. It focuses on Kanpur city, where half the city depends directly on groundwater resources for meeting their requirements, making the aquifers susceptible to low yield and facing the risk of irreversible over-exploitation in the coming future. Spatial analysis using Geographical Information System (GIS) has been carried out for economic evaluation of the resource by assessing the criticality of groundwater resources. This is further incorporated into a differential pricing structure with an aim to curb over-exploitation. We have also proposed specific pricing strategies that are better suited and easily implementable in Kanpur city.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"498 - 512"},"PeriodicalIF":2.7,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48134829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-03-13DOI: 10.1080/1573062X.2023.2184702
Xin Huang, Yumin Wang
ABSTRACT Booster disinfectant can help control the growth of microorganism in water distribution systems (WDS). To minimize the booster costs under uncertainty, a double-sided fuzziness chance-constrained programming (DFCCP) model was proposed and applied to two cases. The fuzzy nodal response coefficients were obtained by water quality simulation performed by EPANET simulator with consideration of uncertain parameters. The results indicated that the booster costs increased with the confidence level under both maximum and minimum reliability scenarios. Moreover, the booster costs under maximum reliability are greater than those under minimum reliability. In addition, under minimum reliability the booster costs decreased with the uncertainty level for two cases, while under maximum reliability the booster costs increased or decreased with the uncertainty level, which depends on the variation of nodes with minimum response coefficient. The results obtained can help managers make decisions in a complex consideration of costs and risks.
{"title":"Optimization of injection costs for water distribution systems under double-sided fuzziness","authors":"Xin Huang, Yumin Wang","doi":"10.1080/1573062X.2023.2184702","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2184702","url":null,"abstract":"ABSTRACT Booster disinfectant can help control the growth of microorganism in water distribution systems (WDS). To minimize the booster costs under uncertainty, a double-sided fuzziness chance-constrained programming (DFCCP) model was proposed and applied to two cases. The fuzzy nodal response coefficients were obtained by water quality simulation performed by EPANET simulator with consideration of uncertain parameters. The results indicated that the booster costs increased with the confidence level under both maximum and minimum reliability scenarios. Moreover, the booster costs under maximum reliability are greater than those under minimum reliability. In addition, under minimum reliability the booster costs decreased with the uncertainty level for two cases, while under maximum reliability the booster costs increased or decreased with the uncertainty level, which depends on the variation of nodes with minimum response coefficient. The results obtained can help managers make decisions in a complex consideration of costs and risks.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"513 - 520"},"PeriodicalIF":2.7,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47016939","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-03-13DOI: 10.1080/1573062x.2023.2180396
H. Ramos, Alban Kuriqi, Ó. E. Coronado-Hernández, P. López-Jiménez, M. Pérez-Sánchez
{"title":"Are digital twins improving urban-water systems efficiency and sustainable development goals?","authors":"H. Ramos, Alban Kuriqi, Ó. E. Coronado-Hernández, P. López-Jiménez, M. Pérez-Sánchez","doi":"10.1080/1573062x.2023.2180396","DOIUrl":"https://doi.org/10.1080/1573062x.2023.2180396","url":null,"abstract":"","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"1 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45940110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-03-09DOI: 10.1080/1573062x.2023.2183136
Saida Kaykhaii, Inga Herrmann, Annelie Hedström, Kerstin Nordqvist, Maria Viklander
A polymeric ultrafiltration (UF) membrane was used for stormwater treatment, with the focus on evaluating the increase in the membrane process productivity by adding pulsatile fluid flow to UF membrane treatment. Sedimentation and sieving were used as pre-treatment. The result showed that increasing the pulse frequency from 0 to 4 Hz increased productivity from −6.6 to 82 LMH. UF membrane removed suspended solids, oil and turbidity below detection limit. The UF membrane also separated total coliforms, E. coli and P. aeruginosa below detection limit. Total organic carbon (TOC) was reduced by between 81%, in average. In addition, the UF membrane was able to reduce BOD7 and COD to below 7 mg/L in the permeate. According to the US EPA, WHO, and national regulations in Canada, Japan, and South Korea, treated stormwater can be used for flushing toilets and streets irrigation and agricultural use.
{"title":"Stormwater treatment using an ultrafiltration membrane and pulsatile fluid flow","authors":"Saida Kaykhaii, Inga Herrmann, Annelie Hedström, Kerstin Nordqvist, Maria Viklander","doi":"10.1080/1573062x.2023.2183136","DOIUrl":"https://doi.org/10.1080/1573062x.2023.2183136","url":null,"abstract":"A polymeric ultrafiltration (UF) membrane was used for stormwater treatment, with the focus on evaluating the increase in the membrane process productivity by adding pulsatile fluid flow to UF membrane treatment. Sedimentation and sieving were used as pre-treatment. The result showed that increasing the pulse frequency from 0 to 4 Hz increased productivity from −6.6 to 82 LMH. UF membrane removed suspended solids, oil and turbidity below detection limit. The UF membrane also separated total coliforms, E. coli and P. aeruginosa below detection limit. Total organic carbon (TOC) was reduced by between 81%, in average. In addition, the UF membrane was able to reduce BOD7 and COD to below 7 mg/L in the permeate. According to the US EPA, WHO, and national regulations in Canada, Japan, and South Korea, treated stormwater can be used for flushing toilets and streets irrigation and agricultural use.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136177684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-03-08DOI: 10.1080/1573062X.2023.2183137
Chandra Sainadh Srungavarapu, A. G. Sheik, E. Tejaswini, Sheik Mohammed Yousuf, S. R. Ambati
ABSTRACT The influent and effluent data from wastewater treatment plants being highly correlated with multi-variable coupling and time-varying features may degrade the performance of conventional soft sensors over time. Adaptive strategies based on just-in-time learning (JIT), moving windows (MW), and time difference (TD) are used in this work to develop an adaptive soft sensor. Multi-output Gaussian-process regression (MGPR) is selected and hybrid methods such as TD JIT, MW TD, and JIT MW TD along with TD and MGPR methods are implemented. Data from the benchmark simulation model No.1, closed-loop architecture after applying PI controller, and real-time data from the Rithala Plant of Delhi are obtained. The improved error percentage is 15.03% for total phosphorus (open-loop) using the JIT TD method when compared with the MW TD method. Fair results are observed with JIT TD on real time data with a strong correlation between predicted and observed values, above 0.8 for any variable being estimated.
{"title":"An integrated machine learning framework for effluent quality prediction in Sewage Treatment Units","authors":"Chandra Sainadh Srungavarapu, A. G. Sheik, E. Tejaswini, Sheik Mohammed Yousuf, S. R. Ambati","doi":"10.1080/1573062X.2023.2183137","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2183137","url":null,"abstract":"ABSTRACT The influent and effluent data from wastewater treatment plants being highly correlated with multi-variable coupling and time-varying features may degrade the performance of conventional soft sensors over time. Adaptive strategies based on just-in-time learning (JIT), moving windows (MW), and time difference (TD) are used in this work to develop an adaptive soft sensor. Multi-output Gaussian-process regression (MGPR) is selected and hybrid methods such as TD JIT, MW TD, and JIT MW TD along with TD and MGPR methods are implemented. Data from the benchmark simulation model No.1, closed-loop architecture after applying PI controller, and real-time data from the Rithala Plant of Delhi are obtained. The improved error percentage is 15.03% for total phosphorus (open-loop) using the JIT TD method when compared with the MW TD method. Fair results are observed with JIT TD on real time data with a strong correlation between predicted and observed values, above 0.8 for any variable being estimated.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"487 - 497"},"PeriodicalIF":2.7,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45457972","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
Pub Date : 2023-03-03DOI: 10.1080/1573062X.2023.2179928
I. Shaikh, M. Ahammed
ABSTRACT Greywater treatment and reuse is getting increasing attention all over the world, and sand filters are one of the on-site greywater treatment alternatives. Effects of media size, media depth and flow rates on the performance of the continuously operated saturated sand filters treating greywater were evaluated in this study. River sand of three different media sizes 0.30-0.60 (fine), 0.60-0.85 (medium), and 0.85-1.18 (coarse) mm was used and sand filters with the same media size were constructed and operated at flow rates of 10 (320 L/m2/day), 20 and 30 L/d. Fine sand media filter operated at a hydraulic loading rate of 320 L/m2/day gave the best performance with 99, 94 and 95% removal of turbidity, BOD and COD, respectively. NH4-N, PO4-P and FC were reduced by 84, 99% and 1.65 log, respectively. An optimization study showed an optimum sand size of 0.68 mm and a hydraulic loading rate of 470 L/m2/day.
{"title":"Sand filtration for greywater treatment: long-term performance evaluation and optimization by response surface methodology","authors":"I. Shaikh, M. Ahammed","doi":"10.1080/1573062X.2023.2179928","DOIUrl":"https://doi.org/10.1080/1573062X.2023.2179928","url":null,"abstract":"ABSTRACT Greywater treatment and reuse is getting increasing attention all over the world, and sand filters are one of the on-site greywater treatment alternatives. Effects of media size, media depth and flow rates on the performance of the continuously operated saturated sand filters treating greywater were evaluated in this study. River sand of three different media sizes 0.30-0.60 (fine), 0.60-0.85 (medium), and 0.85-1.18 (coarse) mm was used and sand filters with the same media size were constructed and operated at flow rates of 10 (320 L/m2/day), 20 and 30 L/d. Fine sand media filter operated at a hydraulic loading rate of 320 L/m2/day gave the best performance with 99, 94 and 95% removal of turbidity, BOD and COD, respectively. NH4-N, PO4-P and FC were reduced by 84, 99% and 1.65 log, respectively. An optimization study showed an optimum sand size of 0.68 mm and a hydraulic loading rate of 470 L/m2/day.","PeriodicalId":49392,"journal":{"name":"Urban Water Journal","volume":"20 1","pages":"450 - 464"},"PeriodicalIF":2.7,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45828287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
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