Transmembrane pressure difference inference device and diffused air amount control device

Abstract

To appropriately infer changes over time in transmembrane pressure to perform an appropriate membrane filtration operation, without being bound by typical approach regarding the diffused air volume control. An inference device () includes: an input data acquisition section () configured to acquire input data derived from operation data that is measured during a membrane filtration operation, the operation data including a membrane filtration pressure and a diffused air volume; and an inference section () configured to (i) use a regression model () to infer transmembrane pressure-related data after the predetermined time, and (ii) execute an updating process M times (where M is an integer of not less than 2) while changing part of data included in the input data, the updating process being a process of updating the input data N times (where N is an integer of not less than 2) by changing the transmembrane pressure-related data included in the input data to the inferred transmembrane pressure-related data, so as to obtain M inference results on changes over time in the transmembrane pressure in a period up to N×the predetermined time.