Osmotic separation systems and methods

The invention generally relates to osmotically driven membrane systems and processes and more particularly to systems and processes for handling feed streams without pretreatment and increased brine concentration for zero liquid discharge, including forward osmosis separation (FO), direct osmotic concentration (DOC), pressure-assisted forward osmosis (PAFO), and pressure retarded osmosis(PRO). The system includes: a plurality of forward osmosis units, each having a semi-permeable membrane assembly and a tank; and a separation system in fluid communication with the plurality of forward osmosis units and configured to separate the dilute draw solution into the concentrated draw solution and a solvent system. 本发明大体涉及渗透驱动膜系统和工艺，更具体地涉及用于处理进料流的系统和工艺，所述系统和工艺无需预处理且对于零液体排放而言盐水浓度未增加，包括正向渗透分离(FO)、直接渗透浓缩(DOC)、压力辅助正向渗透(PAFO)和压力延缓渗透(PRO)。该系统包含：多个正向渗透单元，各单元具有半透膜组件和槽；以及分离系统，所述分离系统与多个正向渗透单元流体连通，并被构造用于将稀释的驱动溶液分离成浓缩的驱动溶液和溶剂系统。