High frequency pulsed electrodialysis of acidic filtrate in kraft pulping

Alvaro Gonzalez-Vogel; Juan J. Moltedo; Rafael Quezada Reyes; Alex Schwarz; Orlando J. Rojas

doi:10.1016/j.jenvman.2020.111891

High frequency pulsed electrodialysis of acidic filtrate in kraft pulping

Alvaro Gonzalez-Vogel^*, Juan J. Moltedo, Rafael Quezada Reyes, Alex Schwarz, Orlando J. Rojas

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

We introduce high frequency pulsed electrodialysis (hf-pED) to process the acidic filtrate of a Kraft pulp bleaching stage, tested in a pilot trial. Compared with conventional electrodialysis, hf-pED at 2,000 Hz allows a reduction in operational cost by 12%, estimated as 0.54 USD/m³ of acidic filtrate, while simultaneously preventing membrane fouling. The proposed sectorial stream treatment is demonstrated to significantly improve the quality of the final effluent, according to mass balances, making it more suitable for irrigation applications, considering requirements of irrigation norms. Thus, we estimate a reduction of 59, 21, and 20% in the concentration of chloride, sodium, and sulfate, respectively, in the final effluent of a conventional Kraft pulping mill. This strategy is presented as a sustainable and economic solution compared with the desalinization of the whole final effluent.

Original language	English
Article number	111891
Number of pages	8
Journal	Journal of Environmental Management
Volume	282
DOIs	https://doi.org/10.1016/j.jenvman.2020.111891
Publication status	Published - 15 Mar 2021
MoE publication type	A1 Journal article-refereed

Keywords

Electrodialysis kraft pulping
High frequency pulsed electrodialysis
Irrigation effluent
Non-process elements separation
Pulsed electrodialysis reversal

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10.1016/j.jenvman.2020.111891

CHEM_Gonzalez-Vogel_et_al_High_frequency_pulsed_electrodialysis_2021_Journal_of_Environmental_ManagementAccepted author manuscript, 1 MBLicence: CC BY-NC-ND

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title = "High frequency pulsed electrodialysis of acidic filtrate in kraft pulping",

abstract = "We introduce high frequency pulsed electrodialysis (hf-pED) to process the acidic filtrate of a Kraft pulp bleaching stage, tested in a pilot trial. Compared with conventional electrodialysis, hf-pED at 2,000 Hz allows a reduction in operational cost by 12%, estimated as 0.54 USD/m3 of acidic filtrate, while simultaneously preventing membrane fouling. The proposed sectorial stream treatment is demonstrated to significantly improve the quality of the final effluent, according to mass balances, making it more suitable for irrigation applications, considering requirements of irrigation norms. Thus, we estimate a reduction of 59, 21, and 20% in the concentration of chloride, sodium, and sulfate, respectively, in the final effluent of a conventional Kraft pulping mill. This strategy is presented as a sustainable and economic solution compared with the desalinization of the whole final effluent.",

keywords = "Electrodialysis kraft pulping, High frequency pulsed electrodialysis, Irrigation effluent, Non-process elements separation, Pulsed electrodialysis reversal",

author = "Alvaro Gonzalez-Vogel and Moltedo, {Juan J.} and Reyes, {Rafael Quezada} and Alex Schwarz and Rojas, {Orlando J.}",

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T1 - High frequency pulsed electrodialysis of acidic filtrate in kraft pulping

AU - Gonzalez-Vogel, Alvaro

AU - Moltedo, Juan J.

AU - Reyes, Rafael Quezada

AU - Schwarz, Alex

AU - Rojas, Orlando J.

PY - 2021/3/15

Y1 - 2021/3/15

N2 - We introduce high frequency pulsed electrodialysis (hf-pED) to process the acidic filtrate of a Kraft pulp bleaching stage, tested in a pilot trial. Compared with conventional electrodialysis, hf-pED at 2,000 Hz allows a reduction in operational cost by 12%, estimated as 0.54 USD/m3 of acidic filtrate, while simultaneously preventing membrane fouling. The proposed sectorial stream treatment is demonstrated to significantly improve the quality of the final effluent, according to mass balances, making it more suitable for irrigation applications, considering requirements of irrigation norms. Thus, we estimate a reduction of 59, 21, and 20% in the concentration of chloride, sodium, and sulfate, respectively, in the final effluent of a conventional Kraft pulping mill. This strategy is presented as a sustainable and economic solution compared with the desalinization of the whole final effluent.

AB - We introduce high frequency pulsed electrodialysis (hf-pED) to process the acidic filtrate of a Kraft pulp bleaching stage, tested in a pilot trial. Compared with conventional electrodialysis, hf-pED at 2,000 Hz allows a reduction in operational cost by 12%, estimated as 0.54 USD/m3 of acidic filtrate, while simultaneously preventing membrane fouling. The proposed sectorial stream treatment is demonstrated to significantly improve the quality of the final effluent, according to mass balances, making it more suitable for irrigation applications, considering requirements of irrigation norms. Thus, we estimate a reduction of 59, 21, and 20% in the concentration of chloride, sodium, and sulfate, respectively, in the final effluent of a conventional Kraft pulping mill. This strategy is presented as a sustainable and economic solution compared with the desalinization of the whole final effluent.

KW - Electrodialysis kraft pulping

KW - High frequency pulsed electrodialysis

KW - Irrigation effluent

KW - Non-process elements separation

KW - Pulsed electrodialysis reversal

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JO - Journal of Environmental Management

JF - Journal of Environmental Management

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High frequency pulsed electrodialysis of acidic filtrate in kraft pulping

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Keywords

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