TY - JOUR
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
UR - http://www.scopus.com/inward/record.url?scp=85099209456&partnerID=8YFLogxK
U2 - 10.1016/j.jenvman.2020.111891
DO - 10.1016/j.jenvman.2020.111891
M3 - Article
AN - SCOPUS:85099209456
SN - 0301-4797
VL - 282
JO - Journal of Environmental Management
JF - Journal of Environmental Management
M1 - 111891
ER -