School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, PR China.
Bioresour Technol. 2022 Feb;345:126466. doi: 10.1016/j.biortech.2021.126466. Epub 2021 Dec 2.
This work revealed the characteristics of fouling layer on the flat-sheet membranes and its development in an integrated oxidation-ditch membrane bioreactor. During the operation period (130 days), the reactor performed very well in removing pollutants. As the operation proceeded, membrane fouling occurred on the flat-sheet membranes and trans-membrane pressure showed a cyclical variation. The experimental results showed that the process of membrane fouling appeared successively in two different structures: biofilm (BF) and sludge fouling (SF). The substances causing membrane fouling were mainly organic foulants and a small amount of inorganic metal compounds, especially the protein-like and fulvic acid-like substances in loosely bound extracellular polymeric substances (LB-EPS). The analysis of microbial communities revealed that SF and BF had very different microbial properties. Although most membrane foulants could be removed by physical and chemical cleaning methods, the protein-like and fulvic acid-like substances in BF were contribute much to causing irreversible membrane fouling.
本研究揭示了一体化氧化沟膜生物反应器中平板膜上污垢层的特性及其发展情况。在运行期间（130 天），该反应器在去除污染物方面表现出色。随着运行的进行，平板膜上发生了膜污染，跨膜压力呈现周期性变化。实验结果表明，膜污染过程依次经历了生物膜（BF）和污泥污染（SF）两种不同的结构。引起膜污染的物质主要是有机污染物和少量无机金属化合物，特别是松散结合胞外聚合物（LB-EPS）中的类蛋白和类腐殖酸物质。微生物群落分析表明，SF 和 BF 具有非常不同的微生物特性。尽管大多数膜污染物可以通过物理和化学清洗方法去除，但 BF 中的类蛋白和类腐殖酸物质对造成不可逆膜污染的贡献更大。
