Diagnosis method for separation membrane module and deterioration diagnosis device for separation membrane module

Abstract

The present invention relates to a state diagnosis method for a separation membrane module for obtaining permeate water from water-to-be-treated, the state diagnosis method including: supplying a test water containing at least two types of solutes to a separation membrane module, or individually supplying at least two types of a test water containing at least one type of solute to the separation membrane module; and comparing a separation performance based on a concentration of the solute contained in the permeate water to determine any of a type of an abnormality, a degree of an abnormality, and a generation position of an abnormality of the separation membrane module.

Dependencies are inferred from the claim text.