Hey Tobias, Bajraktari Niada, Vogel Jörg, Hélix Nielsen Claus, la Cour Jansen Jes, Jönsson Karin
a VA SYD , Malmö , Sweden.
b Sweden Water Research AB , Lund , Sweden.
Environ Technol. 2017 Sep;38(17):2130-2142. doi: 10.1080/09593330.2016.1246616. Epub 2016 Oct 24.
Raw municipal wastewater from a full-scale wastewater treatment plant was physicochemically pretreated in a large pilot-scale system comprising coagulation, flocculation, microsieve and microfiltration operated in various configurations. The produced microsieve filtrates and microfiltration permeates were then concentrated using forward osmosis (FO). Aquaporin Inside FO membranes were used for both the microsieve filtrate and microfiltration permeates, and Hydration Technologies Inc.-thin-film composite membranes for the microfiltration permeate using only NaCl as the draw solution. The FO performance was evaluated in terms of the water flux, water flux decline and solute rejections of biochemical oxygen demand, and total and soluble phosphorus. The obtained results were compared with the results of FO after only mechanical pretreatment. The FO permeates satisfied the Swedish discharge demands for small and medium-sized wastewater treatment plants. The study demonstrates that physicochemical pretreatment can improve the FO water flux by up to 20%. In contrast, the solute rejection decreases significantly compared to the FO-treated wastewater with mechanical pretreatment.
来自一座大型污水处理厂的原城市污水在一个大型中试规模系统中进行了物理化学预处理，该系统包括以各种配置运行的混凝、絮凝、微筛和微滤。然后，使用正向渗透（FO）对产生的微筛滤液和微滤渗透液进行浓缩。水通道蛋白内置型FO膜用于微筛滤液和微滤渗透液，而Hydration Technologies Inc.的复合薄膜仅以NaCl作为汲取溶液用于微滤渗透液。根据水通量、水通量下降以及生化需氧量、总磷和可溶性磷的溶质截留率对正向渗透性能进行了评估。将获得的结果与仅经过机械预处理后的正向渗透结果进行了比较。正向渗透渗透液满足瑞典对中小型污水处理厂的排放要求。研究表明，物理化学预处理可将正向渗透水通量提高多达20%。相比之下，与经过机械预处理的正向渗透处理废水相比，溶质截留率显著降低。
