Importance

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Abstract

A method of operating and monitoring a group of filter membrane modules connected in parallel and with the modules being periodically backwashed, in which: raw water to be treated is injected at a regulated pressure and the permeate outlet pressure is regulated to less than the inlet pressure; the group is provided with a water meter (60) on the raw water inlet duct and with three pressure sensors, one on the raw water inlet, one on the permeate outlet, and one on the backwash circuit, the meter and the sensors (100) delivering signals to a controller; each module is backwashed in succession with permeate from the other modules, with each module being individualized at that moment, thereby making it possible with aid of the water meter and of the pressure sensors to determine the permeability (150) in backwashing specific to the module as individualized in this way, and also to determine the production permeability of the remainder of the modules; and the values determined in this way are compared with reference values in order to modify the periodicity of backwashes and to proceed with module cleaning, and also to detect any anomaly in operation.

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First Claim