Rapid biological oxygen consumption detection device

Abstract

The invention relates to a rapid biological oxygen consumption detection device which is characterized by comprising a container containing a measured water sample, an air pump, a liquid discharge peristaltic pump, a water inlet electric valve and a drainage electric valve, wherein the container containing the measured water sample is provided with a biological sensor, a reversing valve for switching the water inlet direction, a dissolved oxygen detection pond, a dissolved oxygen sensor, an aeration head, a heater and a water temperature sensor; the air pump is connected with the aeration head through a gas pipeline; the heater is connected with the water temperature sensor; the dissolved oxygen detection pond is hermetically arranged in the container containing the measured water sample; the biological sensor is connected with a water inlet of the dissolved oxygen detection pond through the reversing valve for switching the water inlet direction; the liquid discharge peristaltic pump is connected with a water outlet of the dissolved oxygen detection pond; the dissolved oxygen sensor is arranged in the dissolved oxygen detection pond. The rapid biological oxygen consumption detection device has the advantages that the structure is simple, the detection is accurate, the automatic control can be realized, and the like.

Description

technical field [0001] The invention relates to the technical field of water quality analysis, and relates to a rapid detection device for biological oxygen consumption in water bodies. technical background [0002] Biological oxygen demand (BOD, Biochemistry Oxygen Demand) is an important indicator of water quality analysis. It refers to the total amount of dissolved oxygen in water consumed when organic matter in water is oxidized and decomposed due to the biochemical action of microorganisms. This indicator can directly reflect the degree of pollution of the water body and the impact on the surrounding ecology. [0003] At present, most of the standard methods for measuring BOD at home and abroad follow the BOD published by the United States in 1936. 5 Law. However, this method has serious defects. It needs to be cultivated at a constant temperature of 20°C for 5 days. In this way, not only the workload is heavy, the operation is cumbersome, but also there are many inte...

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Problems solved by technology

However, this method has serious defects. It needs to be cultivated at a constant temperature of 20°C for 5 days. In this way, not only the workload is heavy, the operation is cumbersome, but also there are many interference factors, resulting in poor repeatability and large errors of the experimental data. Received quite professional training, the most important thing is BOD 5 The time period of the method is long, it cannot reflect the change of water quality in a timely and effective manner, and the data has a serious lag

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