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Loading and Stress Effects on Flat Sheet Membrane Bioreactor (FSMBR) Fouling

机译：平板膜生物反应器（FSMBR）污垢的装载和应力效应

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The objective of the research was to investigate the effects of inducing loading and bacterial stress conditions on the fouling of the membranes. Two paralleled laboratory-scale flat sheet membrane bioreactors (FSMBR) with three Kubota Type 203 flat membrane cartridges in each were set up to treat a synthetic sugar-based industrial wastewater. One reactor served as the control, while the other one served as the experimental reactor. One parameter was varied in the experimental reactor versus the control for each phase. Three stress conditions were employed during the study, including different organic loading rates (OLR phase), high salt concentration (salt phase), and temperature spikes (temperature phase). The synthetic sugar-based wastewater provided a consistent COD strength of approximately 7100 mg/L. Several key parameters were monitored during the study. Under the imposed stress conditions, the experimental reactor had a smaller particle size, higher average effluent COD concentration, and lower sludge filterability. The experimental reactor also fouled at a faster rate than the control reactor. The results showed that imposed stress conditions have an effect on the bacteria in the MBR which impacts on sludge characteristics such as filterability, polysaccharide production, floc size, effluent COD concentration, effluent color, and most importantly the rate of membrane fouling.
机译：该研究的目的是探讨诱导载荷和细菌应激条件对膜污垢的影响。设立了两个平行的实验室鳞片平板膜生物反应器（FSMBR），每个kubota型203型扁平膜筒盒都被设置为治疗合成糖的工业废水。一个反应器用作控制，而另一个反应器用作实验反应器。在实验反应器中变化了一个参数，而对每个相的控制则变化。在研究期间使用三种应力条件，包括不同的有机加载率（OLR相），高盐浓度（盐相）和温度尖峰（温度阶段）。合成糖基废水提供一致的COD强度约为7100 mg / L.在研究期间监测了几个关键参数。在施加的应力条件下，实验反应器具有较小的粒径，较高的平均流出鳕鱼浓度，较低的污泥过滤性。实验反应器也以比对照反应器更快的速率污染。结果表明，施加的应力条件对MBR中的细菌产生了影响，影响污泥特性，如过滤性，多糖生产，絮凝尺寸，流出鳕鱼浓度，流出的颜色，以及最重要的是膜污染速率。

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