Zhang, Dongqing and Trzcinski, Antoine Prandota and Luo, Jinxue and Stuckey, David C. and Tan, Soon Keat (2017) Fate and behavior of dissolved organic matter in a submerged anoxic-aerobic membrane bioreactor (MBR). Environmental Science and Pollution Research. ISSN 0944-1344
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Abstract
In this study, the production, composition, and characteristics of dissolved organic matter (DOM) in an anoxic-aerobic submerged membrane bioreactor (MBR) were investigated. The average concentrations of proteins and carbohydrates in the MBR aerobic stage were 3.96 ± 0.28 and 8.36 ± 0.89 mg/L, respectively. After membrane filtration, these values decreased to 2.9 ± 0.2 and 2.8 ± 0.2 mg/L, respectively. High performance size exclusion chromatograph (HP-SEC) analysis indicated a bimodal molecular weight (MW) distribution of DOMs, and that the intensities of all the peaks were reduced in the MBR effluent compared to the influent. Three-dimensional fluorescence excitation emission matrix (FEEM) indicated that fulvic and humic acid-like substances were the predominant DOMs in biological treatment processes. Precise identification and characterization of low-MW DOMs was carried out using gas chromatography-mass spectrometry (GC-MS). The GC-MS analysis indicated that the highest peak numbers (170) were found in the anoxic stage, and 54 (32%) compounds were identified with a similarity greater than 80%. Alkanes (28), esters (11), and aromatics (7) were the main compounds detected. DOMs exhibited both biodegradable and recalcitrant characteristics. There were noticeable differences in the low-MW DOMs present down the treatment process train in terms of numbers, concentrations, molecular weight, biodegradability, and recalcitrance.
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| Item Type: | Article (Commonwealth Reporting Category C) |
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| Refereed: | Yes |
| Item Status: | Live Archive |
| Additional Information: | Published online 27 Nov 2017. Accepted version deposited in accordance with the copyright policy of the publisher. |
| Faculty / Department / School: | Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying |
| Date Deposited: | 29 Jan 2018 05:43 |
| Last Modified: | 04 Dec 2018 23:53 |
| Uncontrolled Keywords: | dissolved organic matter (DOM); anoxic-aerobic MBR; fluorescence excitation emission matrix (EEM); gas chromatography-mass spectrometry (GC-MS) |
| Fields of Research : | 09 Engineering > 0904 Chemical Engineering > 090404 Membrane and Separation Technologies 09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies 05 Environmental Sciences > 0502 Environmental Science and Management > 050206 Environmental Monitoring |
| Socio-Economic Objective: | D Environment > 96 Environment > 9609 Land and Water Management > 960912 Urban and Industrial Water Management |
| Identification Number or DOI: | 10.1007/s11356-017-0586-x |
| URI: | http://eprints.usq.edu.au/id/eprint/33501 |
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