Fate and behavior of dissolved organic matter in a submerged anoxic-aerobic membrane bioreactor (MBR)
Article
Article Title | Fate and behavior of dissolved organic matter in a submerged anoxic-aerobic membrane bioreactor (MBR) |
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ERA Journal ID | 5827 |
Article Category | Article |
Authors | Zhang, Dongqing (Author), Trzcinski, Antoine Prandota (Author), Luo, Jinxue (Author), Stuckey, David C. (Author) and Tan, Soon Keat (Author) |
Journal Title | Environmental Science and Pollution Research |
Journal Citation | 25 (5), pp. 4289-4302 |
Number of Pages | 14 |
Year | 2018 |
Publisher | Springer |
Place of Publication | Germany |
ISSN | 0944-1344 |
1614-7499 | |
Digital Object Identifier (DOI) | https://doi.org/10.1007/s11356-017-0586-x |
Web Address (URL) | https://link.springer.com/article/10.1007%2Fs11356-017-0586-x |
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. |
Keywords | dissolved organic matter (DOM); anoxic-aerobic MBR; fluorescence excitation emission matrix (EEM); gas chromatography-mass spectrometry (GC-MS) |
ANZSRC Field of Research 2020 | 400409. Separation technologies |
401102. Environmentally sustainable engineering | |
410404. Environmental management | |
Byline Affiliations | Nanyang Environment and Water Research Institute, Singapore |
School of Civil Engineering and Surveying | |
Chinese Academy of Sciences, China | |
Imperial College London, United Kingdom | |
Nanyang Technological University, Singapore | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4849/fate-and-behavior-of-dissolved-organic-matter-in-a-submerged-anoxic-aerobic-membrane-bioreactor-mbr
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