Device for online monitoring CO2 excretion rate of aquatic organisms in real time and water environment monitoring method

Abstract

The invention relates to a device for online monitoring the CO2 excretion rate of aquatic organisms in real time and a water environment monitoring method. The device comprises a respiratory chamber,a three-way valve, a fluid-flow pump, a digital controller, an environment signal detecting device, a CO2 concentration detecting device, a data collector, and a computer. In order to improve the precision of measurement, a gas-liquid separator, a silica gel drying tube, and a polytetrafluoroethylene filter are arranged, the gas in water is separated and dried before the CO2 concentration measurement, and the provided device can realize real-time online long-term monitoring. At the same time, the invention provides a method of using the provided device to monitor water environment. The indexessuch as CO2 concentration, atmospheric pressure, temperature, salinity, and the like, are collected, the detected data is processed to obtain the CO2 excretion rate of aquatic organisms, and the water environment is monitored.

Description

technical field [0001] The invention belongs to the technical field of environmental monitoring, and relates to a real-time on-line monitoring of aquatic organisms CO 2 Discharge rate device and water environment monitoring method. Background technique [0002] The quality of the water environment directly affects the metabolism of aquatic organisms. By measuring the CO of aquatic organisms 2 The excretion rate can evaluate the quality of the water environment. Existing CO 2 The measurement technology is mostly used for the monitoring of the atmospheric environment and the cultivation of greenhouse plants, and it cannot be used for real-time online monitoring of aquatic organisms CO in the water environment. 2 Excretion rate techniques. [0003] CO dissolved in water in the prior art 2 Most of the measurement techniques use chemical methods for monitoring. Water contains various interfering ions, and the pH value of water has a great influence on the measurement results...

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Problems solved by technology

[0003] CO dissolved in water in the prior art 2 The measurement technology mostly uses chemical methods for monitoring, and the water contains various interfering ions. The pH value of the water has a great influence on the measurement results, making the measurement results inaccurate, and it is impossible to monitor continuously in real time, let alone for a long time.

In addition, on the one hand, the CO produced by the metabolism of aquatic organisms in the prior art 2 The test is to take samples in the flowing water to be tested, and the measurement results are inaccurate; on the other hand, the influence of environmental factors is not considered in the measurement process. The environmental factors that affect the metabolism of aquatic organisms include temperature, salinity, atmospheric pressure, etc., for example, when the temperature is not At the same time, even if the other living conditions of aquatic organisms are the same, the metabolism of aquatic organisms is also different. The measurement without considering the influence of environmental factors is inaccurate and cannot truly reflect the changes in the water environment.

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