Scale-up rules for flocculation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F17%3A00313226" target="_blank" >RIV/68407700:21220/17:00313226 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.minpro.2017.08.003" target="_blank" >http://dx.doi.org/10.1016/j.minpro.2017.08.003</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.minpro.2017.08.003" target="_blank" >10.1016/j.minpro.2017.08.003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Scale-up rules for flocculation

Popis výsledku v původním jazyce

We present here a study of three baffled tanks, 0.15 m, 0.20m and 0.30min inner diameter, agitated by Rushton turbine, with reference to scaling up the flocculation kinetics. A clay slurry was used as a model wastewater. The experimentswere carried out at mixing intensity 40 W/m3 and clay concentration 0.58 g/L. The model wastewater was flocculated with the Sokoflok 16A organic flocculent (solution 0.1 wt%) in the range of dimensionless flocculent dosage DF from 0.448 to 5.241 mg/g. The flocs that formed were separated bymeans of sedimentation. The operational conditions were designed according to following proposed scale-up rules: i) P/V = const., ii) tF * = N.tF=const., iii)DF * =const. and iv) used=const. Applying the proposed scale-up rules, the flocculation efficiency was found to be practically the same irrespective of vessel size and flocculation dosage. For the given flocculated system and process conditions, the maximum degree of turbidity removal Ze * max=96.1± 0.6% was found for dimensionless flocculation time 1916 ± 5% and dimensionless flocculent dosage DF * =3.128 mg/g ± 8%, regardless of vessel size. The approach to scale-up proposed by Camp (1955) is discussed and criticized in the light of present-day mixing theory, and an explanation is offered of the shortcomings of this approach, and why it gives incorrect scale-up results.

Název v anglickém jazyce

Scale-up rules for flocculation

Popis výsledku anglicky

We present here a study of three baffled tanks, 0.15 m, 0.20m and 0.30min inner diameter, agitated by Rushton turbine, with reference to scaling up the flocculation kinetics. A clay slurry was used as a model wastewater. The experimentswere carried out at mixing intensity 40 W/m3 and clay concentration 0.58 g/L. The model wastewater was flocculated with the Sokoflok 16A organic flocculent (solution 0.1 wt%) in the range of dimensionless flocculent dosage DF from 0.448 to 5.241 mg/g. The flocs that formed were separated bymeans of sedimentation. The operational conditions were designed according to following proposed scale-up rules: i) P/V = const., ii) tF * = N.tF=const., iii)DF * =const. and iv) used=const. Applying the proposed scale-up rules, the flocculation efficiency was found to be practically the same irrespective of vessel size and flocculation dosage. For the given flocculated system and process conditions, the maximum degree of turbidity removal Ze * max=96.1± 0.6% was found for dimensionless flocculation time 1916 ± 5% and dimensionless flocculent dosage DF * =3.128 mg/g ± 8%, regardless of vessel size. The approach to scale-up proposed by Camp (1955) is discussed and criticized in the light of present-day mixing theory, and an explanation is offered of the shortcomings of this approach, and why it gives incorrect scale-up results.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20703 - Mining and mineral processing

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

International Journal of Mineral Processing

ISSN

0301-7516

e-ISSN

1879-3525

Svazek periodika

167

Číslo periodika v rámci svazku

august

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

79-85

Kód UT WoS článku

000412962500010

EID výsledku v databázi Scopus

2-s2.0-85028467639