A theoretical and experimental analysis of calcium speciation and precipitation in dairy ultrafiltration permeate

Gwyneth Rice, Andrew Barber, Andrea O'Connor, Geoff Stevens, Sandra Kentish

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    Dairy ultrafiltration permeate is a fluid that is often discarded from the manufacturing process. However, downstream processes such as nanofiltration can be used to separate the valuable lactose and calcium from the monovalent salts, facilitating recovery of a valuable by-product. Previous work has shown that the nanofiltration membrane can suffer from significant fouling due to calcium precipitation. In this work, a model describing the speciation and fouling potential of calcium salts in skim milk ultrafiltration permeate is presented. Results are compared with experimentally determined calcium concentrations in both laboratory prepared solutions and permeate obtained directly from a dairy factory. The model is able to fit the experimental data well for solutions below the saturation concentration for calcium salts, but is less able to fit systems where precipitation of such salts is possible as the extent of the metastable salt region is not readily predicted.

    Original languageEnglish
    Pages (from-to)694-706
    Number of pages13
    JournalINTERNATIONAL DAIRY JOURNAL
    Volume20
    Issue number10
    DOIs
    Publication statusPublished - Oct 2010

    Fingerprint Dive into the research topics of 'A theoretical and experimental analysis of calcium speciation and precipitation in dairy ultrafiltration permeate'. Together they form a unique fingerprint.

  • Cite this