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Evolution and accumulation of organic foulants on hydrophobic and hydrophilic membrane surfaces in a submerged membrane bioreactor

机译：淹没式膜生物反应器中疏水性和亲水性膜表面上有机污垢的演变和积累

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摘要

Membrane surface modification is attracting more attention to mitigate biofouling in membrane bioreactors (MBRs). Five membranes differing in chemistry and hydrophobic/hydrophilic potential were run in parallel in a lab-scale MBR under the same conditions. Membranes were sampled after 1, 10, 20 and 30 days of MBR operation with synthetic wastewater. Subsequently, accumulated organic foulants were characterised using several chemical analytical tools. Results showed similar development of organic foulants with time, illustrating that membrane surface chemistry did not affect the selection of specific organic foulants. Multivariate analysis showed that biofilm samples clustered according to the day of sampling. The composition of organic foulants shifted from protein-like substances towards humics and polysaccharides-like substances. We propose that to control biofouling in MBRs, one should focus less on the membrane surface chemistry.
机译：膜表面改性正在吸引更多的关注，以减轻膜生物反应器（MBR）中的生物污染。在相同条件下，在实验室规模的MBR中并行运行了五个化学和疏水/亲水性不同的膜。 MBR操作1、10、20和30天后，使用合成废水对膜进行采样。随后，使用几种化学分析工具对积累的有机污垢进行了表征。结果表明，随着时间的推移，有机污垢物也有类似的发展，说明膜表面化学性质不会影响特定有机污垢物的选择。多变量分析表明，生物膜样品根据采样日期聚集。有机污垢物的组成从蛋白质样物质转变为腐殖质和多糖样物质。我们建议，为了控制MBR中的生物污染，应减少对膜表面化学的关注。

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