Required Water Quality for the Use of High-Performance Membranes

2011 ◽  
pp. 53-57
Author(s):  
Ikuo Aoike
Keyword(s):  
Water Quality ◽  
High Performance

scholarly journals Evaluation of Water Quality by High-performance Liquid Chromatography.

1996 ◽  
Vol 19 (1) ◽  
pp. 33-39 ◽  
Author(s):  
Nobuyoshi KAIGA ◽  
Soichiro NAKANO ◽  
Kenji TAGUCHI ◽  
Yoshihiko TEZUKA ◽  
Tadahiro ISHII
Keyword(s):  
Water Quality ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance

scholarly journals IberWQ: A GPU Accelerated Tool for 2D Water Quality Modeling in Rivers and Estuaries

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 413 ◽  
Author(s):  
Orlando García-Feal ◽  
Luis Cea ◽  
José González-Cao ◽  
José Manuel Domínguez ◽  
Moncho Gómez-Gesteira
Keyword(s):  
Water Quality ◽  
High Performance ◽  
Numerical Models ◽  
Water Quality Modeling ◽  
Test Cases ◽  
Processing Unit ◽  
Environmental Status ◽  
Quality Modeling ◽  
Stratified Estuaries ◽  
Averaged Model

Numerical models are useful tools to analyze water quality by computing the concentration of physical, chemical and biological parameters. The present work introduces a two-dimensional depth-averaged model that computes the most relevant and frequent parameters used to evaluate water quality. High performance computing (HPC) techniques based on graphic processing unit (GPU) parallelization have been applied to improve the efficiency of the package, providing speed-ups of two orders of magnitude in a standard PC. Several test cases were analyzed to show the capabilities and efficiency of the model to evaluate the environmental status of rivers and non-stratified estuaries. IberWQ will be freely available through the package Iber.

scholarly journals Water quality for triathlon and open water swimming competitions in Brazilian freshwaters

2021 ◽  
Vol 21 (4) ◽  
pp. 169-179
Author(s):  
Frederico Azevedo Lopes ◽  
Andrea Coelho Leite
Keyword(s):  
Water Quality ◽  
High Performance ◽  
Prolonged Exposure ◽  
Open Water ◽  
Water Clarity ◽  
E Coli ◽  
Primary Contact ◽  
Open Water Swimming ◽  
Belo Horizonte ◽  
Contact Recreation

Abstract In high-performance competitive activities, there can be intense and prolonged exposure to water during swimming components of the competition. Therefore, water quality assessments with reference to standards are desirable to ensure athletes’ health. We evaluated whether the official criteria established for primary contact recreation in Brazilian freshwaters (CONAMA Directive 274/2000), and an integrated index of bathing conditions in Brazil (ICB), are consistent with the water quality standards stipulated by the International Triathlon Union (ITU). The water quality of Lake of Ingleses, an important venue for triathlon and open water swimming near Belo Horizonte, Minas Gerais, Brazil, was assessed between 2003 and 2019. Results for E. coli, cyanobacteria density, and pH were favorable for contact recreation and competitions at the lake. Of the variables considered, only turbidity, used as a proxy indicator of visual water clarity, was unsuitable during part of the monitoring period. The ICB agreed with the ITU standards for Very Good and Excellent quality classes and is recommended as a tool for screening sites considered for competitions in Brazilian freshwaters. However, the Brazilian national criteria for contact recreation only present standards for E. coli and pH, which is insufficient coverage of attributes affecting primary contact suitability of water in high-performance sports activities.

High-performance triboelectric nanogenerators for self-powered, in-situ and real-time water quality mapping

Nano Energy ◽  
2019 ◽  
Vol 66 ◽  
pp. 104117 ◽  
Author(s):  
Yu Bai ◽  
Liang Xu ◽  
Chuan He ◽  
Laipan Zhu ◽  
Xiaodan Yang ◽  
...  
Keyword(s):  
Water Quality ◽  
Real Time ◽  
High Performance ◽  
Self Powered ◽  
Triboelectric Nanogenerators ◽  
Water Quality Mapping

Organic characterisation tools for distribution system management

2009 ◽  
Vol 9 (1) ◽  
pp. 1-8 ◽  
Author(s):  
C. W. K. Chow ◽  
Philipp Kuntke ◽  
Rolando Fabris ◽  
Mary Drikas
Keyword(s):  
Water Quality ◽  
Organic Carbon ◽  
Distribution System ◽  
High Performance ◽  
Distribution Systems ◽  
Management Strategies ◽  
Molecular Size ◽  
Quality Parameters ◽  
Size Exclusion ◽  
Treated Drinking Water

In this investigation, high-performance size exclusion chromatography (HPSEC) was used to characterise organic matter in treated drinking water at key sampling locations along two selected distribution systems (chlorinated and chloraminated). Other water quality parameters such as colour, UV254, dissolved organic carbon (DOC) and assimilable organic carbon (AOC) as measured by bacterial regrowth potential (BRP), were also determined. One of the aims of this work was to develop new tools to monitor organic character change along the distribution system in order to identify impacting factors and develop management strategies based on water quality change. This study used samples from two contrasting distribution systems with different disinfection regimes and organic characteristics together with samples generated from laboratory simulations. System 1 is a chlorinated distribution system and generally requires elevated chlorine dosage to meet the demand due to the high DOC level. System 2 is a chloraminated system with stable water quality, low DOC and low chloramine dose (mild oxidation). Molecular size distribution determination using HPSEC is a very informative technique in assessing treatment processes and in this study the appearance of a molecular peak at 1,700 Da that can be used as an indicator of biological activity in distribution systems was confirmed. The use of BRP values, for upstream and downstream samples in the distribution system, was found to be a good approach to assess biological impacts on water stability. The observed biological impact from the biofilms between the studied systems were particularly useful in confirming the organic characterisation results.

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