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Loading and Stress Effects on Flat SheetMembrane Bioreactor (FSMBR) Fouling

机译：平板膜生物反应器（FSMBR）结垢的载荷和应力影响

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摘要

The objective of the research was to investigate the effects of inducing loading and bacterialrnstress conditions on the fouling of the membranes. Two paralleled laboratory-scale flat sheetrnmembrane bioreactors (FSMBR) with three Kubota Type 203 flat membrane cartridges in eachrnwere set up to treat a synthetic sugar-based industrial wastewater. One reactor served as therncontrol, while the other one served as the experimental reactor. One parameter was varied in thernexperimental reactor versus the control for each phase. Three stress conditions were employedrnduring the study, including different organic loading rates (OLR phase), high salt concentrationrn(salt phase), and temperature spikes (temperature phase). The synthetic sugar-based wastewaterrnprovided a consistent COD strength of approximately 7100 mg/L.rnSeveral key parameters were monitored during the study. Under the imposed stress conditions,rnthe experimental reactor had a smaller particle size, higher average effluent COD concentration,rnand lower sludge filterability. The experimental reactor also fouled at a faster rate than therncontrol reactor. The results showed that imposed stress conditions have an effect on the bacteriarnin the MBR which impacts on sludge characteristics such as filterability, polysaccharidernproduction, floc size, effluent COD concentration, effluent color, and most importantly the raternof membrane fouling.
机译：该研究的目的是研究诱导负荷和细菌应激条件对膜结垢的影响。设置了两个平行的实验室规模的平板膜生物反应器（FSMBR），每个中都有三个久保田203型平板膜滤筒，以处理合成糖基工业废水。一个反应器用作温度控制，另一反应器用作实验反应器。对于每个阶段，在实验反应器中相对于对照改变一个参数。在研究过程中采用了三种应力条件，包括不同的有机负荷率（OLR相），高盐浓度（盐相）和温度峰值（温度相）。合成糖基废水提供了约7100 mg / L的稳定COD强度。在研究过程中监测了几个关键参数。在强加应力条件下，实验反应器具有较小的粒径，较高的平均出水COD浓度，较低的污泥可过滤性。实验反应器的结垢速度也比对照反应器快。结果表明，强加的胁迫条件对MBR中的细菌有影响，MBR中的细菌会影响污泥特性，如过滤性，多糖产量，絮凝物大小，出水COD浓度，出水颜色，最重要的是滤膜的结垢。

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