Effect of mixing intensity onto kinetics of flock growth in an agitated tank
Result description
The effect of mixing intensity onto kinetics of flock growth and shape characterized by the fractal dimension was investigated. The experiments were carried out in a baffled tank agitated by a Rushton turbine at the mixing intensities 40, 64 and 95 W/m3and kaolin concentration of 0.44 g/dm3. The size and shape of flocks were investigated by image analysis. The flock growth kinetic data was fitted according to generalized correlation proposed by the authors. The dependences A f * = 85.66.eV 1/2, df eq max = 0.623.eV-1/4 and [NtF]max = 1245 were found for model parameters. The fractal dimension Df2 was found to be independent of flocculation time and mixing intensity and its value of 1.469 ? 0.037 was determined as an average for the given conditions.
Keywords
flocculationturbiditymixingscale upRushton turbinestirred vesselwastewater treatmentflocculent dosageflocculent kinetics
The result's identifiers
Result code in IS VaVaI
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Effect of mixing intensity onto kinetics of flock growth in an agitated tank
Original language description
The effect of mixing intensity onto kinetics of flock growth and shape characterized by the fractal dimension was investigated. The experiments were carried out in a baffled tank agitated by a Rushton turbine at the mixing intensities 40, 64 and 95 W/m3and kaolin concentration of 0.44 g/dm3. The size and shape of flocks were investigated by image analysis. The flock growth kinetic data was fitted according to generalized correlation proposed by the authors. The dependences A f * = 85.66.eV 1/2, df eq max = 0.623.eV-1/4 and [NtF]max = 1245 were found for model parameters. The fractal dimension Df2 was found to be independent of flocculation time and mixing intensity and its value of 1.469 ? 0.037 was determined as an average for the given conditions.
Czech name
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Czech description
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Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CI - Industrial chemistry and chemical engineering
OECD FORD branch
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Result continuities
Project
GP101/07/P456: Intensification of Flocculation in Wastewater Treatment
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2010
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Inzynieria chemiczna i procesowa
ISSN
0208-6425
e-ISSN
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Volume of the periodical
31
Issue of the periodical within the volume
2
Country of publishing house
PL - POLAND
Number of pages
11
Pages from-to
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UT code for WoS article
000280605200007
EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
CI - Industrial chemistry and chemical engineering
Year of implementation
2010