Device and method for online detecting oxygen and carbon dioxide in biological fermentation tail gas

Abstract

The invention discloses a device and method for online detecting oxygen and carbon dioxide in a biological fermentation tail gas. The device comprises a water removing device, a gas detecting chamber, a singlechip, a heat radiating fan, a power supply and a PC (Personal Computer) terminal, wherein the gas detecting chamber comprises a gas inlet end and a gas outlet end, the gas inlet end is connected with a gas outlet, the gas detecting chamber is internally provided with an oxygen sensor and a carbon dioxide sensor, the singlechip is connected with the oxygen sensor and the carbon dioxide sensor, the power supply is connected with the oxygen sensor, the carbon dioxide sensor and the heat radiating fan, and the PC terminal is connected with the singlechip. The invention further provides a method for online detecting the oxygen and the carbon dioxide in the biological fermentation tail gas. The device is simple in structure, strong in practicability, low in manufacturing cost, capable of continuously online operating for a long time, and capable of simultaneously completing online detection of contents of oxygen and carbon dioxide; the influence of the water in the tail gas is eliminated, and thus important respiratory metabolism parameters such as CER (Carbon dioxide Evolution Rate), OUR (Oxygen Uptake Rate) and RQ (Respiratory Quotient) in a fermentation process are obtained.

Description

technical field [0001] The invention relates to a device and method for online detection of oxygen and carbon dioxide in biological fermentation tail gas, belonging to the technical field of biological fermentation process detection manufacturing technology. Background technique [0002] Fermentation is one of the most basic technologies in the field of bioengineering, and the yield and quality of fermentation are two important technical indicators of fermentation engineering. Changes in the concentration of certain components in the tail gas during fermentation can reflect the changes in the substances in the entire fermentation process, especially the changes in the concentration of oxygen and carbon dioxide in the tail gas, which can reflect important information related to the fermentation process. [0003] In order to improve the yield and quality of fermentation engineering, it is essential to control the main parameters of the fermentation process. At this stage, peo...

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Problems solved by technology

[0005] At present, the online detection of tail gas has been widely used in petroleum, chemical industry, metallurgy, environmental protection, automobile, etc., but there are still relatively few industrial online detection equipment that can be applied in biological fermentation engineering.

When high-precision measurement of tail gas is required in fermentation process research, mass spectrometers are generally used, but such high-precision detection is not necessary for the detection of industrial fermentation production tail gas, and such devices are generally expensive, complicated to operate and maintain, and not widely applicable

[0006] Another tail gas detection method is to use an infrared gas analyzer and a magnetic oxygen meter combined detection system during the fermentation process. Although this method can detect the concentration of carbon dioxide and oxygen online at the same time, it has high costs, complicated equipment, and is portable. Poor sex and other disadvantages

The above-mentioned oxygen and carbon dioxide detection devices are generally used in the fermentation production industry, but these detection devices are not suitable for fermentation engineering production in terms of cost, detection parameters, accuracy and installation methods

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