Innovations in MF/UF membrane technologies: Development and scale-up of electrically conductive membrane coatings and recycled membranes for wastewater reuse

这项拟议的研究旨在发展膜技术的创新，并加速这些创新进入工业应用的中试规模。该项目分为三个部分：1.防止表面污染的导电膜；2.回收污染的膜，用于非饮用水再利用；3.材料放大和中试试验。在第一部分中，重点介绍了导电防污染膜的操作条件。我们将评估由De Lannoy实验室的几项成熟技术合成的导电MF和UF膜的防胶体和抗生物污染能力。我们将进一步研究操作条件(外加电压强度、极性、频率)对导电膜抗污染能力的影响，并开发模型来预测最佳操作条件。在第二部分中，重点是膜材料的改性。被污染的膜将通过蚀刻旧的/用过的微滤(MF)、超滤(UF)和反渗透(RO)膜表面进行回收和再利用。这些被污染、蚀刻和回收的膜将用于分离城市废水。渗透液将经过紫外线消毒处理，产品水将在非饮用水再利用应用中进行可行性评估。在拟议的研究的第三部分中，我们将重点研究导电和回收膜的放大。我们将制定方法，扩大导电薄膜在Pall薄膜生产线上的应用。规模化生产包括共挤出涂层技术，在中膜和超滤膜上覆盖导电表面层。我们还将回收被污染的膜组件，并将它们用于目前由特洛伊运营的Greenway污水处理厂的试点规模系统。我们将把回收膜组件的流出物耦合到内联紫外线消毒中，并评估其水质是否适用于非饮用水再利用应用。

The proposed research aims to develop innovations in membrane technologies and accelerate those innovations to the pilot-scale for industrial applicability. The project is divided into three components: 1. Electrically conductive membranes to prevent surface fouling 2. Recycling fouled membranes for non-potable reuse applications and 3. Material scale-up and pilot-scale testing of both. In part 1, the focus is on operating conditions of electrically conductive anti-fouling membranes. We will evaluate the anti-colloidal and anti-biofouling capabilities of electrically conductive MF and UF membranes, synthesized from several established techniques in the de Lannoy lab. We will further investigate how operating conditions (applied voltage strength, polarity, frequency) impact the anti-fouling abilities of electrically conductive membranes and develop models to predict the optimal operating conditions. In part 2, the focus is on membrane material modifications. Fouled membranes will be recycled and reused by etching old/used microfiltration (MF), ultrafiltration (UF), and reverse osmosis (RO) membrane surfaces. These fouled, etched and recycled membranes will be used to separate municipal wastewaters. The permeate will be treated with UV disinfection and the product water will be evaluated for viability in non-potable reuse applications. In part 3 of the proposed research we will focus on investigating scaling-up of electrically conductive and recycled membranes. We will establish methods to scale up electrically conductive membranes for applications in Pall's membrane production line. Scale-up production includes co-extrusion coating techniques to coat MF and UF membranes with electrically conductive surface layers. We will also recycle fouled membrane modules and use them in the pilot scale systems currently at the Greenway wastewater treatment plant operated by Trojan. We will couple the effluent from the recycled membrane modules to inline UV disinfection and assess the water quality for its applicability to non-potable reuse applications.