AWWA water science最新文献_第9页

Understanding questions and concerns about potable water reuse: An analysis of survey write-in responses 理解关于饮用水再利用的问题和担忧：对调查书面回复的分析

AWWA water science Pub Date : 2023-04-18 DOI: 10.1002/aws2.1333

Caroline E. Scruggs, Catherine M. Heyne, Kellin N. Rumsey

引用次数: 1

Acclimation, manganese removal, and backwash impact on full-scale drinking water biofilter microbiome 驯化、除锰和反冲洗对全尺寸饮用水生物过滤器微生物组的影响

AWWA water science Pub Date : 2023-04-18 DOI: 10.1002/aws2.1334

William R. Morales Medina, Priscilla To, Malcolm Taylor, Caroline Nguyen, Nicole L. Fahrenfeld

{"title":"Acclimation, manganese removal, and backwash impact on full-scale drinking water biofilter microbiome","authors":"William R. Morales Medina, Priscilla To, Malcolm Taylor, Caroline Nguyen, Nicole L. Fahrenfeld","doi":"10.1002/aws2.1334","DOIUrl":"https://doi.org/10.1002/aws2.1334","url":null,"abstract":"Biofiltration for drinking water treatment has several water quality benefits but questions remain about biofilter start-up in temperate climates where temperature and water quality changes can impact performance. A year-long full-scale demonstration was performed with biofilters operated in parallel to chlorinated filters to (O1) monitor the development of the biofilter microbiota across the acclimation period with respect to removal of Mn and total organic carbon, and (O2) determine the impact of depth and backwash events on the microbial community composition and function. Biofilter media biomass increased for the first 6 months of operation and after about 9 months the biofilters achieved comparable Mn removal to the chlorinated filters. Prokaryotic diversity decreased when the water temperature dropped. Backwash resulted in an increase in microbial diversity deeper in the biofilter. By the next sampling (30 h post backwash), 16S rRNA gene copies were again more abundant in the upper layers. Metagenomic sequencing confirmed the presence of moxA and mofA, Mn oxidizing genes. The results presented can help inform expected performance of full-scale biofilters in temperate climates.","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"5 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1334","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50151927","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of cyanobacteria and their taste and odorous metabolites in the lower River Murray: 2000–2022 2000–2022年默里河下游蓝藻及其味觉和气味代谢产物的评估

AWWA water science Pub Date : 2023-04-03 DOI: 10.1002/aws2.1328

Florence Choo, Emma Sawade, David Cook

引用次数: 0

Patterns and impacts of cyanobacteria in a deep, thermally stratified, oligotrophic lake 深层、热分层、贫营养湖泊中蓝藻的模式和影响

AWWA water science Pub Date : 2023-03-29 DOI: 10.1002/aws2.1326

Anthony R. Prestigiacomo, Rebecca M. Gorney, James B. Hyde, Courtney Davis, Aimee Clinkhammer

{"title":"Patterns and impacts of cyanobacteria in a deep, thermally stratified, oligotrophic lake","authors":"Anthony R. Prestigiacomo, Rebecca M. Gorney, James B. Hyde, Courtney Davis, Aimee Clinkhammer","doi":"10.1002/aws2.1326","DOIUrl":"https://doi.org/10.1002/aws2.1326","url":null,"abstract":"Cyanobacterial blooms are a concern in oligotrophic lakes because these systems are often used for multiple purposes (i.e., recreation and public water supplies). Monitoring cyanobacteria impacts is challenging in such cases because of low and heterogeneous concentrations over time, space, and depth. Canandaigua Lake (New York State) is oligotrophic, but has been impacted by blooms since at least the early 2000s, with limited quantification. This study integrated data from established shoreline surveillance and inter-agency monitoring programs to connect lake processes and evaluate use impacts. Surveys at open-water locations were conducted to investigate the origination, timing, and magnitude of cyanobacterial bloom development. Impacts on recreation and source water were caused by blooms originating in the epilimnion that moved to shorelines and intake depths. The integration of multiple monitoring programs was critical to understanding impacts. The methods developed here can be adopted to other cases of large, deep, low-nutrient lakes.","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"5 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1326","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50147392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Summer odors to winter blooms: Treatment validation in the lower River Murray 夏季气味对冬季花朵的影响：默里河下游的处理验证

AWWA water science Pub Date : 2023-03-27 DOI: 10.1002/aws2.1330

Florence Choo, Emma Sawade, David Cook

引用次数: 0

Examining the efficacy of copper-silver ionization for management of Legionella: Recommendations for optimal use 检验铜银电离治疗军团菌的疗效：最佳使用建议

AWWA water science Pub Date : 2023-03-26 DOI: 10.1002/aws2.1327

Mark LeChevallier

引用次数: 1

Variabilities in commercial cyanotoxin standards 商业蓝藻毒素标准的变异性

AWWA water science Pub Date : 2023-03-26 DOI: 10.1002/aws2.1332

Ai Jia, Matthew D. Prescott, Yingbo C. Guo, George D. Di Giovanni, Wei L. Li, Eduardo A. Garcia, Jonathan Zapata, Samuel D. Patton, Brett J. Vanderford, Andrew D. Eaton

{"title":"Variabilities in commercial cyanotoxin standards","authors":"Ai Jia, Matthew D. Prescott, Yingbo C. Guo, George D. Di Giovanni, Wei L. Li, Eduardo A. Garcia, Jonathan Zapata, Samuel D. Patton, Brett J. Vanderford, Andrew D. Eaton","doi":"10.1002/aws2.1332","DOIUrl":"https://doi.org/10.1002/aws2.1332","url":null,"abstract":"Cyanotoxin standards are commercially available from various suppliers. To investigate the potential impact of different sources on the comparability of cyanotoxin monitoring results among different methods and studies, this study evaluated the quality of 86 cyanotoxin standards from nine vendors via enzyme-linked immunosorbent assay and liquid chromatography–tandem mass spectrometry. Substantial variabilities between vendors (up to 60%) and between lots (up to 98%) were observed for most of the standards. In addition, some of the microcystin standards had up to 11% of other microcystins as impurities. Compared to non-certified analytical standards, certified standards showed much better agreement, with standards variations below 15% for all tested toxins. This study highlights the importance of developing and applying unified and certified standards for cyanotoxin analysis to improve the consistency and comparability of results. If different sources/lots of standards are used, they need to be cross-checked to evaluate the potential impacts on results.","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"5 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1332","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50144856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Geospatial model of composition of water service lines in Flint, Michigan: Validation using excavation data and a new compositional geostatistical approach 密歇根州弗林特市供水线路组成的地理空间模型：使用挖掘数据和新的组成地质统计学方法进行验证

AWWA water science Pub Date : 2023-03-24 DOI: 10.1002/aws2.1331

Pierre Goovaerts

{"title":"Geospatial model of composition of water service lines in Flint, Michigan: Validation using excavation data and a new compositional geostatistical approach","authors":"Pierre Goovaerts","doi":"10.1002/aws2.1331","DOIUrl":"https://doi.org/10.1002/aws2.1331","url":null,"abstract":"Following the Flint drinking water crisis, a service line (SL) replacement program was implemented to replace lead SLs and galvanized SLs connecting residences to Flint's water system, leading to the excavation and inspection over a 5-year period (2016–2020) of a total of 26,750 lines, representing close to 50% of all tax parcels in the City of Flint. These recent data were used to validate an earlier geospatial model created by residual indicator kriging (IK) to predict the probability that a home has a lead, galvanized, or copper private-side SL based on neighboring house inspections (i.e., 3254 homes visited in 2017) and secondary information (i.e., built year and city records on SL composition). Receiver operating characteristic curves indicated an average frequency of detection (i.e., area under the curve [AUC]) of 0.9 for copper and galvanized material and 0.6 for lead service lines. Predicting the composition of SL at unmonitored residences by IK, however, can result in negative probabilities of occurrence and probabilities that do not sum to 1. These limitations were overcome by adopting simplicial IK, whereby data undergo a logratio transform before the geospatial analysis. This first application of a compositional approach to SL data improved the detection of lead SLs (AUC = 0.8 vs. 0.6) while providing coherent predictions. Incorporating secondary information, in particular using standardized cokriging and a new rescaled cross-semivariogram estimator introduced to correct for geographical clustering of house inspections, increased the accuracy of the prediction.","PeriodicalId":101301,"journal":{"name":"AWWA water science","volume":"5 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aws2.1331","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50154008","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 literature review of bench top and pilot lead corrosion assessment studies 对试验台和试点铅腐蚀评估研究的文献综述

AWWA water science Pub Date : 2023-03-24 DOI: 10.1002/aws2.1324

Christina Devine, Simoni Triantafyllidou

引用次数: 1

Triple-bottom-line approach for comparing point-of-use/point-of-entry to centralized water treatment 比较集中式水处理的使用点/入口点的三重底线方法

AWWA water science Pub Date : 2023-03-03 DOI: 10.1002/aws2.1320

Kaycie Lane, David Reckhow, John Tobiason, Emily Kumpel

引用次数: 0