A pressure difference micro-movement liquid column balance coulometric bod measuring device

Abstract

The invention relates to a differential pressure micro-movement liquid column balance type Coulomb method BOD measuring device, the device comprises a constant temperature control unit and a plurality of Coulomb BOD measuring units arranged in the constant temperature control unit, and the constant temperature control unit comprises a constant temperature water bath , a temperature probe arranged in a constant temperature water bath, a relay electrically connected to the temperature probe in turn, a data acquisition controller, and a cold water heater. It is set in a constant temperature water bath, and connected with a data acquisition controller through circuits respectively. Compared with the prior art, the present invention has simple and compact overall structure, simple operation, stable performance, easy to dismantle, wash and replace the equipment, and the relevant parameters of the test can be automatically monitored, tracked and recorded by computer throughout the whole process, and can be used for various organic substances (such as: Volatility, photolysis, poor solubility, etc.) biodegradation test.

Description

technical field [0001] The invention belongs to the technical field of detection, and relates to a BOD measuring device, in particular to a pressure difference micro-movement liquid column balance type coulometric method BOD measuring device. Background technique [0002] BOD (short for Biochemical Oxygen Demand): biochemical oxygen demand or biochemical oxygen demand (generally refers to five-day biochemical oxygen demand), a comprehensive index indicating the content of aerobic pollutants such as organic matter in water. Biochemical oxygen demand (BOD) is an environmental monitoring indicator, mainly used to monitor the pollution status of organic matter in water bodies. Generally, organic matter can be decomposed by microorganisms, but when microorganisms decompose organic compounds in water, they need to consume oxygen. If the dissolved oxygen in water is not enough to supply the needs of microorganisms, the water body will be in a polluted state. Therefore, BOD is an i...

AI Technical Summary

Problems solved by technology

The technical solution published in this patent mainly uses two dissolved oxygen electrodes to directly measure the dissolved oxygen data of the water quality at two points entering the device. The accuracy of the data depends on the accuracy of the dissolved oxygen electrodes. The test object is mainly water or polluted water. Mainly used in the field of water quality monitoring, it is not suitable for evaluating the environmental biodegradability of specific organic chemicals

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