Composite membrane separation method applied to desalination and recovery of sewage

摘要

Disclosed is a composite membrane separation method applicable to desalting and recycling of sewage. The method achieves desalting of the sewage through a filtering and adsorbing effect of a conductive composite membrane reactor. The conductive composite membrane reactor consists of a water inlet system (1), a power source system (2), a membrane reactor (3), a water outlet control system (4) and a clean water tank (5). The membrane reactor (3) consists of a reaction tank, a composite membrane module (6) and a stirring system. The composite membrane module (6) has a flat sheet membrane configuration and consists of a cathode composite membrane (8), an anode composite membrane (9) and a separation layer (10), wherein the cathode composite membrane (8) is formed by adhering, using a polymeric material, a cathode electrode (12) with a cathode current collector (11) and the anode composite membrane (9) is formed by adhering, using a polymeric material, an anode electrode (13) with an anode current collector (14). The cathode composite membrane (8) and the anode composite membrane (9) are separated by the separation layer (10) to avoid a short circuit. The cathode current collector (11) is disposed on the same side as a water inlet, the anode current collector (14) is disposed on the same side as a water outlet. Influent water first flows through the cathode current collector (11) and the cathode electrode (12), then the separation layer (10), and then the anode electrode (13) and the anode current collector (14), and is discharged from the conductive composite membrane reactor in the form of membrane effluent water.