Document Detail


Integrating fluorescent dye flow-curve testing and acoustic Doppler velocimetry profiling for in situ hydraulic evaluation and improvement of clarifier performance.
MedLine Citation:
PMID:  20853746     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Enhancing the performance of clarifiers requires a thorough understanding of their hydraulics. Fluorescence spectroscopy and acoustic doppler velocimeter (ADV) profiling generally have been used separately to evaluate secondary settlers. We propose that simultaneous use of these techniques is needed to obtain a more reliable and useful evaluation. Experiments were performed on laboratory- and full-scale clarifiers. Factors affecting Fluorescein and Rhodamine 6G properties were identified. Underestimations up to 500% in fluorescence intensities may be derived from differential fluorescence quenching by oxygen. A careful control and interpretation of fluorescent dye experiments is needed to minimize artifacts in real settings. While flow-curve tests constructed under controlled conditions provided a more accurate overall quantitative estimation of the hydraulic performance, ADV velocity and turbulence profiling provided a detailed spatial understanding of flow patterns that was used to troubleshoot and fix the causes of hydraulic short-circuits.
Authors:
F Tarud; M Aybar; G Pizarro; R Cienfuegos; P Pastén
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Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Water environment research : a research publication of the Water Environment Federation     Volume:  82     ISSN:  1061-4303     ISO Abbreviation:  Water Environ. Res.     Publication Date:  2010 Aug 
Date Detail:
Created Date:  2010-09-21     Completed Date:  2010-10-21     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9886167     Medline TA:  Water Environ Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  675-85     Citation Subset:  IM    
Affiliation:
Departamento de Ingeniería Hidráulica y Ambiental, Pontificia Universidad Católica de Chile, Avenida Vicuña Mackenna 4860, Macul, Santiago, Chile.
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MeSH Terms
Descriptor/Qualifier:
Doppler Effect
Fluorescent Dyes / analysis*
Rheology*
Spectrometry, Fluorescence
Waste Management / methods*
Chemical
Reg. No./Substance:
0/Fluorescent Dyes

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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