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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Water Reclamation Using a Ceramic Nanofiltration Membrane and Surface Flushing with Ozonated Water
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Water Reclamation Using a Ceramic Nanofiltration Membrane and Surface Flushing with Ozonated Water

机译：使用陶瓷纳米过滤膜进行水回收并用臭氧水冲洗表面

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摘要

A new membrane fouling control technique using ozonated water flushing was evaluated for direct nanofiltration (NF) of secondary wastewater effluent using a ceramic NF membrane. Experiments were conducted at a permeate flux of 44 L/m2h to evaluate the ozonated water flushing technique for fouling mitigation. Surface flushing with clean water did not effectively remove foulants from the NF membrane. In contrast, surface flushing with ozonated water (4 mg/L dissolved ozone) could effectively remove most foulants to restore the membrane permeability. This surface flushing technique using ozonated water was able to limit the progression of fouling to 35% in transmembrane pressure increase over five filtration cycles. Results from this study also heighten the need for further development of ceramic NF membrane to ensure adequate removal of pharmaceuticals and personal care products (PPCPs) for water recycling applications. The ceramic NF membrane used in this study showed approximately 40% TOC rejection, and the rejection of PPCPs was generally low and highly variable. It is expected that the fouling mitigation technique developed here is even more important for ceramic NF membranes with smaller pore size and thus better PPCP rejection.
机译：对于使用陶瓷NF膜的二次废水的直接纳滤（NF），评估了使用臭氧水冲洗的新型膜污染控制技术。在渗透通量为44 L / m 2 h的条件下进行了实验，以评估臭氧水冲洗技术对减轻结垢的影响。用净水冲洗表面不能有效地除去NF膜上的污垢。相反，用臭氧水（4 mg / L溶解的臭氧）冲洗表面可以有效去除大多数污垢，从而恢复膜的渗透性。这种使用臭氧水的表面冲洗技术能够在五个过滤循环中将跨膜压力升高的结垢进程限制在35％以内。这项研究的结果还提出了进一步开发陶瓷NF膜的需求，以确保充分去除用于水循环应用的药品和个人护理产品（PPCP）。这项研究中使用的陶瓷NF膜显示出约40％的TOC抑制率，而PPCP的抑制率通常较低且变化很大。可以预期，这里开发的结垢缓解技术对于孔径较小，因此PPCP抑制效果更好的陶瓷NF膜而言，甚至更为重要。

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