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Relative importance of process parameters and their mutual interactions on the hydrodynamics of a pulsed disc and doughnut column

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Abstract

The pulsed disc and doughnut extraction column (PDDC) has emerged as an efficient equipment in the field of hydrometallurgy. This work is concerned with determining the statistically significant process parameters and their mutual interaction in relation to the hydrodynamics of a PDDC. Pulsation intensity, %duty cycle, total throughput and organic to aqueous ratio are selected as the process variables. By the Analysis of Variance and the Student’s t test, Pulsation intensity has been identified as the most important parameter in the dispersion regime. %Duty cycle turns out to be a statistically significant process parameter. The mutual interaction between total throughput with pulsation intensity is found to be most influential on the dispersed phase holdup in the dispersion regime. It has been found that the dispersed holdup data is normally distributed. Based on the data, a linear regression model was fitted for the dispersion with an adjusted R2 of 0.983.

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Abbreviations

PSPC:

Pulsed sieve plate column

PDDC:

Pulsed disc and doughnut column

HTU:

Height of transfer unit

TDS:

Total dissolved solids

DOE:

Design of experiment

O/A:

Organic to aqueous

ANOVA:

Analysis of variance

MSS:

Mean sum of square

MSE:

Mean sum of square error

D.O.F:

Degrees of freedom

s.e:

Standard error

A:

%Duty cycle

B:

Pulsation intensity

C:

Total throughput

D:

O/A ratio

n:

Number of replicates

k:

Number of level

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Acknowledgements

The DFGS-PhD Fellowship granted by Department of Atomic Energy (DAE), Govt. of India is humbly acknowledged by the author. Sincere gratitude is extended towards Mr. B.V. Shah, Shri R. Disilva, Shri R.N Rath, Shri R.S. Gaygwal for sharing their expertise and helping in the experimental setup. Effort of Mr. Trushit Makhwana is humbly acknowledged for arranging the metering pumps. Mr. Sukhdeep Singh, Mr. Avinashn Sahu, Shri Puranchand Bhagat and Shri Devesh Kumar are also acknowledged for their kind support.

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Correspondence to Vivekananda Sinha.

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Sinha, V., Datta, D. & Vincent, T. Relative importance of process parameters and their mutual interactions on the hydrodynamics of a pulsed disc and doughnut column. Braz. J. Chem. Eng. (2020). https://doi.org/10.1007/s43153-020-00022-0

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Keywords

  • Dispersed phase holdup
  • Dispersion regime
  • Two-level full factorial design
  • Analysis of variance