Effect of calcium-binding compounds in acid whey on calcium removal during electrodialysis

Nielsen, Erik Tetens; Skibsted, Leif H.; Yazdi, Saeed Rahimi; Merkel, Arthur; Ahrné, Lı́lia

doi:10.1016/j.fbp.2021.11.008

Cited by 7 publications

(10 citation statements)

References 26 publications

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“…The binding of Ca 2+ to lactate forms the calcium‐lactate complex known to decrease Ca 2+ transport during ED (Nielsen et al. 2022). Based on K c (4.03 and 4.18 mol −1 × L for AW and NFAW, respectively) of Ca 2+ and lactate, the distribution between Ca 2+ and complexed calcium was calculated.…”

Section: Resultsmentioning

confidence: 99%

“…The higher transport rate of Ca 2+ in NFAW is explained by the higher concentration of calcium in the NFAW and the amount of ionic calcium. The binding of Ca 2+ to lactate forms the calcium-lactate complex known to decrease Ca 2+ transport during ED (Nielsen et al 2022). Based on K c (4.03 and 4.18 mol −1 × L for AW and NFAW, respectively) of Ca 2+ and lactate, the distribution between Ca 2+ and complexed calcium was calculated.…”

Section: Cation Transport During Ed Processmentioning

confidence: 99%

“…The concentration-based association constant (K c ) of Ca 2+ binding to lactate was calculated from the activity-based association constant, K a , found in Nielsen et al (2022), which was derived from a K c determined by Vavrusova et al (2013), and the ionic strengths of the solutions. The ionic strength (M), I, was calculated based on the solution conductivity (μmho/cm), σ, from the Russell equation (Belessiotis et al 2016):…”

Section: Determination Of Concentration Depended Association Constantsmentioning

confidence: 99%

“…where γ 2+ is the Ca ion activity coefficient, A DH is 0.51 at 25°C and z = 2, which is the charge of the Ca ion. More information about this calculation can be found in Nielsen et al (2022). Knowing γ 2+ the association constant, K c , was calculated:…”

Section: Determination Of Concentration Depended Association Constantsmentioning

confidence: 99%

“…Several studies have shown that ED is an efficient process for separating ions in AW (Chen et al 2016;Dufton et al 2018;Talebi et al 2020;Nielsen et al 2021). The composition of AW is highly important for the ED efficiency, and changes in concentrations and chemical speciation of the ions highly affect the separation efficiency (Nielsen et al 2021;Nielsen et al 2022). A separation of Ca 2+ and Mg 2+ from AW is of interest during ED.…”

Section: Introductionmentioning

confidence: 99%

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Improving electrodialysis separation efficiency of minerals from acid whey by nano‐filtration pre‐processing

Nielsen

Skibsted

Yazdi

et al. 2022

Int J of Dairy Tech

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Acid whey (AW) contains valuable minerals, such as calcium and magnesium. Electrodialysis (ED) is an efficient technology to recover these minerals; however, the less nutritional sodium will also be recovered during ED. AW was processed by nanofiltration prior to ED in order to change the ratio between the monovalent and divalent ions. The nano-filtration increased the efficiency of the ED process regarding recovery of Ca 2+ and Mg 2+ ions by 70% and 67%, respectively, while it did not affect the K + , Na + , phosphates and lactate. The spent energy was more effectively used to recover Ca 2+ in the nano-filtrated AW.

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Section: Resultsmentioning

confidence: 99%

Section: Cation Transport During Ed Processmentioning

confidence: 99%