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Application of liquid-infused membranes to mitigate biofouling
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2020-9-17 , DOI: 10.1039/d0ew00203h Hanieh Bazyar 1, 2, 3, 4, 5 , Linya Xu 5, 6, 7 , Hendrik Jan de Vries 5, 6, 7 , Slawomir Porada 1, 2, 3, 4, 5 , Rob G. H. Lammertink 1, 2, 3, 4, 5
Environmental Science: Water Research & Technology ( IF 3.5 ) Pub Date : 2020-9-17 , DOI: 10.1039/d0ew00203h Hanieh Bazyar 1, 2, 3, 4, 5 , Linya Xu 5, 6, 7 , Hendrik Jan de Vries 5, 6, 7 , Slawomir Porada 1, 2, 3, 4, 5 , Rob G. H. Lammertink 1, 2, 3, 4, 5
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Among different types of membrane fouling, biofouling is a critical issue which can significantly reduce the process productivity. If the initial phase of the microorganism attachment to the pore wall is prevented, a remarkable reduction in biofilm formation can be obtained. A novel approach to achieve this goal is the infusion of the porous membrane with an infusion liquid (oil) forming liquid-infused membranes (LIMs). It has been shown that the pore wall during permeation is still covered with the infusion liquid forming so-called liquid-lined pores. The liquid-lining can enhance anti-biofouling performance by preventing direct contact between the microorganisms and pore wall. Here, we investigate the capability of LIMs in mitigation of biofouling by conducting long-term cross-flow filtration experiments at constant flow rate for approximately 10–20 days. The results show significantly lower increase in transmembrane pressure (TMP) values for LIMs compared to non-infused counterparts (dry membranes). The bacterial growth curves are further investigated by fitting a sigmoidal function (logistic model). Approximately 4 times increase in the lag period λ and 7 times decrease in the bacterial growth rate μm are observed for LIMs compared to dry membranes revealing improved anti-biofouling performance of LIMs.
中文翻译：
液体注入膜在减轻生物污染方面的应用
在不同类型的膜污染中，生物污染是一个关键问题，它可能会大大降低工艺生产率。如果阻止了微生物附着在孔壁上的初始阶段，则可以大大减少生物膜的形成。实现该目标的一种新颖方法是将多孔膜与输注液体（油）一起输注，形成液体输注膜（LIM）。已经显示出，渗透过程中的孔壁仍然被注入液体覆盖，形成了所谓的带液孔。液体衬里可通过防止微生物与孔壁之间的直接接触来增强防污性能。这里，我们通过在恒定流速下进行约10–20天的长期错流过滤实验，研究了LIM在减轻生物结垢方面的能力。结果表明，与未注入的对应物（干膜）相比，LIM的跨膜压力（TMP）值增加幅度明显更低。通过拟合S形函数（逻辑模型）进一步研究细菌的生长曲线。滞后时间增加约4倍λ和7倍，在细菌生长速率降低μ米是为比较干燥的膜的LIM观察透出改善防生物结垢的LIM的性能。
更新日期：2020-09-17
中文翻译：
液体注入膜在减轻生物污染方面的应用
在不同类型的膜污染中，生物污染是一个关键问题，它可能会大大降低工艺生产率。如果阻止了微生物附着在孔壁上的初始阶段，则可以大大减少生物膜的形成。实现该目标的一种新颖方法是将多孔膜与输注液体（油）一起输注，形成液体输注膜（LIM）。已经显示出，渗透过程中的孔壁仍然被注入液体覆盖，形成了所谓的带液孔。液体衬里可通过防止微生物与孔壁之间的直接接触来增强防污性能。这里，我们通过在恒定流速下进行约10–20天的长期错流过滤实验，研究了LIM在减轻生物结垢方面的能力。结果表明，与未注入的对应物（干膜）相比，LIM的跨膜压力（TMP）值增加幅度明显更低。通过拟合S形函数（逻辑模型）进一步研究细菌的生长曲线。滞后时间增加约4倍λ和7倍，在细菌生长速率降低μ米是为比较干燥的膜的LIM观察透出改善防生物结垢的LIM的性能。
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