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首页> 外文期刊>Biofouling >A mechanistic study of in situ chemical cleaning-in-place for a PTFE flat sheet membrane: fouling mitigation and membrane characterization
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A mechanistic study of in situ chemical cleaning-in-place for a PTFE flat sheet membrane: fouling mitigation and membrane characterization

机译：PTFE平板膜原位化学清洗的机理研究：减缓结垢和膜表征

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摘要

This study aimed at unfolding the role and mechanisms of chemically enhanced cleaning-in-place (CIP) regimes in fouling control of polytetrafluoroethylene (PTFE) made flat sheet (FS) membrane bio-reactors (MBRs). The trans-membrane pressure (TMP) was successfully maintained below 10 kPa using a daily CIP regime consisting of 100 to 600 mg l(-1) of NaOCl and cake layer resistance control was shown to be critical for effective high-flux MBR operation. In contrast, in the control unit without the CIP, the TMP exceeded 35 kPa at a flux of 40 LMH. The extracellular polymeric substances associated with proteins (EPSprotein) were also controlled effectively with a daily application of the CIP to the fouled membrane. Moreover, the CIP prompted a thinner and looser bio-cake layer on the membrane surface, suggesting that in situ CIP can be a favorable method to control FS membrane fouling at high-flux MBR operation.
机译：这项研究旨在揭示化学增强的就地清洗（CIP）方案在聚四氟乙烯（PTFE）制成的平板（FS）膜生物反应器（MBR）结垢控制中的作用和机理。使用每日CIP方案成功地将跨膜压（TMP）维持在10 kPa以下，该方案由100至600 mg l（-1）的NaOCl组成，并且滤饼层电阻控制对于有效进行高通量MBR操作至关重要。相反，在没有CIP的控制单元中，TMP在40 LMH的通量下超过35 kPa。通过每天将CIP应用于结膜，也可以有效地控制与蛋白质相关的细胞外聚合物质（EPSprotein）。此外，CIP促使膜表面上的生物饼层更薄和更松散，这表明原位CIP可能是在高通量MBR操作下控制FS膜结垢的有利方法。

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