Activated sludge aerobic respiration measuring device capable of self-checking and calibration and using method

Abstract

The invention discloses an active sludge aerobic respiration measuring device capable of being self-examined and corrected and an application method thereof, which belongs to the technical field of sewage treatment. The measuring device comprises an aeration chamber, a respiration chamber, a measuring chamber, a constant-temperature system, a pH control system and a pipeline flow-direction control system. An outlet of the aeration chamber bypasses a peristaltic pump and is sequentially connected with the measuring chamber, an inlet of the respiration chamber, an outlet of the respiration chamber, the other measuring chamber and an inlet of the aeration chamber through the pipeline flow-direction control system to form a circulating loop. The pipeline flow-direction control system consists of four normally open electromagnetic valves, four normally closed electromagnetic valves, a time relay and a connecting pipe and is a key part for the system to achieve the dynamic self examination and correction function of a soluble oxygen sensor. The dissolved oxygen measuring effect can be detected in real time in the running process of a reactor through the pipeline flow-direction control system, the dissolved oxygen measuring valve is verified, the problem that the dissolved oxygen sensor is drifted can be overcome, and the OUR (oxygen utility rate) calculation precision can be improved.

Description

technical field [0001] The invention relates to an activated sludge aerobic respiration measuring device and application method, which has the function of self-inspection and correction, and can accurately measure the oxygen utilization rate (OxygenUtilityRate, OUR for short) of activated sludge degrading organic matter in an aerobic state, and is suitable for water The experimental research on the kinetics of activated sludge in the treatment process, including the characterization of activated sludge characteristics, the analysis of the kinetic parameters of organic pollutant degradation, and the analysis of energy consumption during the aerobic degradation of organic pollutants, etc., belongs to the field of sewage treatment technology. Background technique [0002] The respiration measurement method is an effective tool and method for measuring the amount of dissolved oxygen consumed by microorganisms per unit time and unit volume (OUR) in activated sludge, and is often u...

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Problems solved by technology

However, the water flow in the dissolved oxygen measurement chamber is perpendicular to the surface of the dissolved oxygen sensor membrane, resulting in instability of the measured value of dissolved oxygen, and the calibration steps of the two dissolved oxygen sensors are completed before the sample is added, which cannot be realized. Dynamic self-checking during measurement

At the same time, the two dissolved oxygen sensors are prone to electrode drift during the measurement process. In different dissolved oxygen concentration ranges, the difference in the measured values ​​of the two dissolved oxygen sensors will change, and with the extension of the measurement time The measurement status will change, so it is not enough to calibrate the dissolved oxygen sensor before the measurement starts, and there will be large measurement errors

[0032] In the actual operation of the above respiration measurement method and device, there are defects such as low test accuracy and large measurement error.

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