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首页> 外文期刊>Separation and Purification Technology >Study of (ir)reversible fouling in MBRs under various operating conditions using new on-line fouling sensor
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Study of (ir)reversible fouling in MBRs under various operating conditions using new on-line fouling sensor

机译：使用新型在线结垢传感器研究MBR在各种运行条件下的（ir）可逆结垢

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In this study, a new fouling sensor was validated under different conditions of hydraulic (HRT) and sludge retention time (SRT). The MBR-VFM (membrane bioreactor-VITO Fouling Measurement) allows the simultaneous determination of the physically reversible and irreversible fouling potential of a mixed liquor during a single crossflow filtration test. In accordance with the on-line filtration behavior, the measured reversible and irreversible fouling propensities differed significantly between MBRs operated at different combinations of HRT-SRT. Moreover, a significant negative correlation was found between the on-line permeability and the reversible and irreversible fouling propensity measured by the MBR-VFM. This corresponded to observations made on membrane recovery after physical or chemical cleaning actions. Higher reversible and irreversible fouling were observed at lower HRT, presumably as a consequence of increased concentrations of foulants present. The effect of SRT was much smaller and restricted to the reversible fouling component. Possible explanations for the increased fouling at prolonged SRT are the higher sludge and colloid concentration and the smaller floc size. It can be concluded that the MBR-VFM is a useful tool to monitor fluctuations in a mixed liquor's (ir)reversible fouling potential and can contribute to a deeper understanding of the occurring fouling phenomena.
机译：在这项研究中，新的污垢传感器在水力（HRT）和污泥停留时间（SRT）的不同条件下得到了验证。 MBR-VFM（膜生物反应器-VITO结垢测量）可以在一次错流过滤测试中同时确定混合液的物理可逆和不可逆结垢潜力。根据在线过滤行为，在不同的HRT-SRT组合下运行的MBR之间，测得的可逆和不可逆结垢倾向显着不同。此外，在在线渗透率与通过MBR-VFM测量的可逆和不可逆结垢倾向之间发现显着负相关。这对应于对物理或化学清洁作用后的膜恢复进行的观察。在较低的HRT上观察到较高的可逆性和不可逆性结垢，可能是由于存在的污垢物浓度增加所致。 SRT的影响要小得多，并且仅限于可逆结垢组件。延长SRT时污垢增加的可能解释是较高的污泥和胶体浓度以及较小的絮凝物尺寸。可以得出结论，MBR-VFM是监测混合液（不可逆）结垢潜力波动的有用工具，并且可以有助于更深入地了解发生的结垢现象。

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