Pressure difference final motion liquid column balance type coulometry BOD measuring device

Abstract

The invention relates to a pressure difference final motion liquid column balance type coulometry BOD measuring device. The device comprises a constant-temperature control unit and a plurality of coulometry BOD measuring units arranged in the constant-temperature control unit. The constant-temperature control unit comprises a constant-temperature water bath, a temperature probe arranged in the constant-temperature water bath, a relay, a data collecting controller and a cold and hot water device, and the relay, the data collecting device and the cold and hot water device are electrically connected with the temperature probe in sequence. The cold and hot water device is communicated with the constant-temperature water bath through a pipeline. The coulometry BOD measuring units are all arranged in the constant-temperature water bath and connected with the data collecting controller through a circuit. Compared with the prior art, the device is simple and compact in overall structure, easy to operate, stable in performance and easy to dismount, wash and replace, computer full-course automatic monitoring, tracking and recording of related test parameters can be achieved, and the device can be used for biodegradation tests of various organic matter such as volatility organic matter, photolysis organic matter and slightly solubility organic matter.

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

Images