Biodegradation behavior of natural organic matter (NOM) in a biological aerated filter (BAF) as a pretreatment for ultrafiltration (UF) of river water |
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| Authors: | Guocheng Huang Fangang Meng Xing Zheng Yuan Wang Zhigang Wang Huijun Liu Martin Jekel |
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| Institution: | 1.School of Environmental Science and Engineering,Sun Yat-sen University,Guangzhou,People’s Republic of China;2.Water Desalination and Reuse Center, King Abdullah University of Science and Technology,Thuwal,Kingdom of Saudi Arabia;3.Yantai Research Institute, China Agricultural University,Yantai,People’s Republic of China;4.Department of Water Quality Control,Technische Universit?t Berlin,Berlin,Germany |
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| Abstract: | In this study, biodegradation of natural organic matter (NOM) in a biological aerated filter (BAF) as pretreatment of UF treating
river water was investigated. Photometric measurement, three-dimensional excitation–emission matrix (EEM) fluorescence spectroscopy
and liquid chromatography with online organic carbon detector (LC-OCD) were used to investigate the fate of NOM fractions
in the BAF + UF process. Results showed that the BAF process could effectively remove particles and parts of dissolved organic
matter, which led to a lower NOM loading in the UF system, but different NOM fractions showed different biodegradation potentials.
Further biodegradation batch experiments confirmed this observation and identified that polysaccharides and proteins (quantified
using photometric methods) contained a large proportion of readily biodegradable matter while humic substances were mainly
composed of inert organic substances. According to EEM measurements, it is evident that protein-like substances were more
readily eliminated by microorganisms than humic-like substances. LC-OCD data also supported the phenomena that the polysaccharides
and large-size proteins were more degradable than humic substances. |
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