Fate and behavior of dissolved organic matter in a submerged anoxic-aerobic membrane bioreactor (MBR)

Zhang, Dongqing and Trzcinski, Antoine Prandota and Luo, Jinxue and Stuckey, David C. and Tan, Soon Keat (2018) Fate and behavior of dissolved organic matter in a submerged anoxic-aerobic membrane bioreactor (MBR). Environmental Science and Pollution Research, 25 (5). pp. 4289-4302. 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)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Date Deposited: 29 Jan 2018 05:43
Last Modified: 25 Mar 2021 05:38
Uncontrolled Keywords: dissolved organic matter (DOM); anoxic-aerobic MBR; fluorescence excitation emission matrix (EEM); gas chromatography-mass spectrometry (GC-MS)
Fields of Research (2008): 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
Fields of Research (2020): 40 ENGINEERING > 4004 Chemical engineering > 400409 Separation technologies
40 ENGINEERING > 4011 Environmental engineering > 401102 Environmentally sustainable engineering
41 ENVIRONMENTAL SCIENCES > 4104 Environmental management > 410404 Environmental management
Socio-Economic Objectives (2008): D Environment > 96 Environment > 9609 Land and Water Management > 960912 Urban and Industrial Water Management
Identification Number or DOI: https://doi.org/10.1007/s11356-017-0586-x
URI: http://eprints.usq.edu.au/id/eprint/33501

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