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|Title:||Fate and behavior of dissolved organic matter in a submerged anoxic-aerobic membrane bioreactor (MBR)||Authors:||Zhang, Dongqing
Trzcinski, Antoine Prandota
Stuckey, David C.
Tan, Soon Keat
|Keywords:||Engineering::Environmental engineering||Issue Date:||2018||Source:||Zhang, D., Trzcinski, A. P., Luo, J., Stuckey, D. C., & Tan, S. K. (2018). Fate and behavior of dissolved organic matter in a submerged anoxic-aerobic membrane bioreactor (MBR). Environmental Science and Pollution Research, 25(5), 4289–4302. doi:10.1007/s11356-017-0586-x||Journal:||Environmental Science and Pollution Research||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.||URI:||https://hdl.handle.net/10356/144671||ISSN:||1614-7499||DOI:||10.1007/s11356-017-0586-x||Schools:||School of Civil and Environmental Engineering||Research Centres:||Nanyang Environment and Water Research Institute||Rights:||© 2017 Springer-Verlag GmbH Germany. All rights reserved.||Fulltext Permission:||none||Fulltext Availability:||No Fulltext|
|Appears in Collections:||CEE Journal Articles|
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