Journal
BIORESOURCE TECHNOLOGY
Volume 102, Issue 2, Pages 2118-2125Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.08.053
Keywords
Milk processing; Particulate; Wastewater; Pyrolysis; GC-MS
Funding
- Burra Foods Pty. Ltd.
- Victorian Government through the Victorian Department of Primary Industries
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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 450 g/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 (220 mg/kg) and the amino acid derivative 1-methyl-5-oxo-L-proline methyl ester (130 mg/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. Crown Copyright (C) 2010 Published by Elsevier Ltd. All rights reserved.
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