Characterization of organic particulates present in milk factory process waters used for reuse along with aerobically digested effluent wastewater

Vincent Verheyen, Alicia Cruickshank, Karl Wild, Michael Heaven, R McGee, Mark Watkins, David Nash

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    Abstract

    Wastewater from a dairy processor is being reused and recycled both within the plant and for irrigation. Flash pyrolysis GC-MS was used to examine nitrogen and phenol containing compounds (M.W.=35 to 450g/mol) in the particulate fraction of the milk condensate, combined clean wastewater and aerobic bioreactor effluent. For comparison, the particulates were also prepared for standard GC-MS analyses using conventional solvent extraction methods. Compounds detected by pyrolysis GC-MS were found mostly in the bioreactor with the amino acid arginine (220mg/kg) and the amino acid derivative 1-methyl-5-oxo-L-proline methyl ester (130mg/kg) found at the highest concentrations. In comparison, sterols detected in the effluent were found at higher concentrations when using solvent extraction indicating some degradation with pyrolysis GC-MS. However, with few exceptions, particulates were generally found not to act as passive collectors capable of concentrating less water soluble chemicals.
    Original languageEnglish
    Pages (from-to)2118 - 2125
    Number of pages8
    JournalBioresource Technology
    Volume102
    Issue number2
    DOIs
    Publication statusPublished - 2011

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