System for detecting oxygen utilization efficiency of MABR process

The utility model discloses a system for detecting the oxygen utilization efficiency of an MABR process. The system comprises an MABR membrane assembly, a gas supply unit, a tail gas unit and an oxygen utilization efficiency online calculation unit. One end of the MABR membrane component (9) is a gas supply unit, and the other end of the MABR membrane component (9) is a tail gas unit; the gas supply unit and the tail gas unit are both connected with the oxygen utilization efficiency online calculation unit. Compared with the prior art, the oxygen utilization efficiency detection device has the advantages that (1) the oxygen utilization efficiency of the MABR process can be detected in real time without stopping the process operation and additionally adding medicaments; and (2) the oxygen content in the residual tail gas of the aeration of the MABR is detected instead of the concentration of dissolved oxygen in the reactor, so that the oxygen utilization efficiency of the MABR can be reflected more directly. 本