Effect of reverse osmosis pre-processing of acid whey and electrodialysis current density on process performance

Emilie N. Nielsen; Mathias Gøtke; Ulysse Cordin; Leif H. Skibsted; Svetlozar Velizarov; João G. Crespo; Lilia M. Ahrné

doi:10.1016/j.fbp.2023.05.002

Effect of reverse osmosis pre-processing of acid whey and electrodialysis current density on process performance

Emilie N. Nielsen, Mathias Gøtke, Ulysse Cordin, Leif H. Skibsted, Svetlozar Velizarov, João G. Crespo, Lilia M. Ahrné

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Abstract

Acid whey (AW) is the main side-stream from acidified dairy products, known for its high contents of lactic acid and minerals. The present work investigates the effect of reverse osmosis (RO) pre-processing of AW (ROAW) and the current density during electrodialysis (ED) on the ED process performance. Firstly, the limiting current density of the ED system when treating AW and ROAW was determined. Then, the AW and ROAW have been demineralized and deacidified at under-limiting or over-limiting current density batch operating conditions. RO pre-processing of AW and current density strongly affect the demineralization rate and solutes mass transport across the membranes. Lactate transport can be rationalized by the weak acid dissociation mechanism, while water splitting played a minor role in the ED process performance. Among cations, calcium and magnesium were most affected by RO pre-processing, due to their high affinity to the cation exchange membranes. Lactose and galactose were found in small amounts in the concentrate solution, while no glucose was detected for most conditions even though the glucose content decreased in the diluates.

Original language	English
Pages (from-to)	72-83
Number of pages	12
Journal	Food and Bioproducts Processing
Volume	140
DOIs	https://doi.org/10.1016/j.fbp.2023.05.002
Publication status	Published - Aug 2023

Keywords

Acid whey
Electrodialysis
Lactate
Minerals
Separation efficiency
Sugars

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.fbp.2023.05.002Licence: CC BY

1-s2.0-S0960308523000597-mainFinal published version, 7.74 MBLicence: CC BY

Cite this

@article{1266b807293443dd80fd2856759f31bc,

title = "Effect of reverse osmosis pre-processing of acid whey and electrodialysis current density on process performance",

abstract = "Acid whey (AW) is the main side-stream from acidified dairy products, known for its high contents of lactic acid and minerals. The present work investigates the effect of reverse osmosis (RO) pre-processing of AW (ROAW) and the current density during electrodialysis (ED) on the ED process performance. Firstly, the limiting current density of the ED system when treating AW and ROAW was determined. Then, the AW and ROAW have been demineralized and deacidified at under-limiting or over-limiting current density batch operating conditions. RO pre-processing of AW and current density strongly affect the demineralization rate and solutes mass transport across the membranes. Lactate transport can be rationalized by the weak acid dissociation mechanism, while water splitting played a minor role in the ED process performance. Among cations, calcium and magnesium were most affected by RO pre-processing, due to their high affinity to the cation exchange membranes. Lactose and galactose were found in small amounts in the concentrate solution, while no glucose was detected for most conditions even though the glucose content decreased in the diluates.",

keywords = "Acid whey, Electrodialysis, Lactate, Minerals, Separation efficiency, Sugars",

author = "Nielsen, {Emilie N.} and Mathias G{\o}tke and Ulysse Cordin and Skibsted, {Leif H.} and Svetlozar Velizarov and Crespo, {Jo{\~a}o G.} and Ahrn{\'e}, {Lilia M.}",

note = "Funding Information: The authors would like to thank the staff of Hobro dairy for collection of acid whey. The present study is a part of the Platform for Novel Gentle Processing supported by the Dairy Rationalisation Fund ( DDRF ), Copenhagen University and Arla Foods . Publisher Copyright: {\textcopyright} 2023 The Authors",

year = "2023",

month = aug,

doi = "10.1016/j.fbp.2023.05.002",

language = "English",

volume = "140",

pages = "72--83",

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issn = "0960-3085",

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T1 - Effect of reverse osmosis pre-processing of acid whey and electrodialysis current density on process performance

AU - Nielsen, Emilie N.

AU - Gøtke, Mathias

AU - Cordin, Ulysse

AU - Skibsted, Leif H.

AU - Velizarov, Svetlozar

AU - Crespo, João G.

AU - Ahrné, Lilia M.

N1 - Funding Information: The authors would like to thank the staff of Hobro dairy for collection of acid whey. The present study is a part of the Platform for Novel Gentle Processing supported by the Dairy Rationalisation Fund ( DDRF ), Copenhagen University and Arla Foods . Publisher Copyright: © 2023 The Authors

PY - 2023/8

Y1 - 2023/8

N2 - Acid whey (AW) is the main side-stream from acidified dairy products, known for its high contents of lactic acid and minerals. The present work investigates the effect of reverse osmosis (RO) pre-processing of AW (ROAW) and the current density during electrodialysis (ED) on the ED process performance. Firstly, the limiting current density of the ED system when treating AW and ROAW was determined. Then, the AW and ROAW have been demineralized and deacidified at under-limiting or over-limiting current density batch operating conditions. RO pre-processing of AW and current density strongly affect the demineralization rate and solutes mass transport across the membranes. Lactate transport can be rationalized by the weak acid dissociation mechanism, while water splitting played a minor role in the ED process performance. Among cations, calcium and magnesium were most affected by RO pre-processing, due to their high affinity to the cation exchange membranes. Lactose and galactose were found in small amounts in the concentrate solution, while no glucose was detected for most conditions even though the glucose content decreased in the diluates.

AB - Acid whey (AW) is the main side-stream from acidified dairy products, known for its high contents of lactic acid and minerals. The present work investigates the effect of reverse osmosis (RO) pre-processing of AW (ROAW) and the current density during electrodialysis (ED) on the ED process performance. Firstly, the limiting current density of the ED system when treating AW and ROAW was determined. Then, the AW and ROAW have been demineralized and deacidified at under-limiting or over-limiting current density batch operating conditions. RO pre-processing of AW and current density strongly affect the demineralization rate and solutes mass transport across the membranes. Lactate transport can be rationalized by the weak acid dissociation mechanism, while water splitting played a minor role in the ED process performance. Among cations, calcium and magnesium were most affected by RO pre-processing, due to their high affinity to the cation exchange membranes. Lactose and galactose were found in small amounts in the concentrate solution, while no glucose was detected for most conditions even though the glucose content decreased in the diluates.

KW - Acid whey

KW - Electrodialysis

KW - Lactate

KW - Minerals

KW - Separation efficiency

KW - Sugars

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U2 - 10.1016/j.fbp.2023.05.002

DO - 10.1016/j.fbp.2023.05.002

M3 - Article

AN - SCOPUS:85159294840

SN - 0960-3085

VL - 140

SP - 72

EP - 83

JO - Food and Bioproducts Processing

JF - Food and Bioproducts Processing

ER -

Effect of reverse osmosis pre-processing of acid whey and electrodialysis current density on process performance

Abstract

Keywords

UN SDGs

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