Portable miniaturized COD (Chemical Oxygen Demand) electrochemical measurement device and measurement method thereof

Abstract

The invention relates to a portable miniaturized COD electrochemical measurement device and a measurement method thereof.The measurement method includes the steps that firstly, a software and hardware system used for environmental ecology is constructed, and the software and hardware system comprises a cylindrical electrochemical experiment pool, a small electrochemical workstation, a circulating pump, an electromagnetic valve, an electric stirrer, an infrared detector, a working electrode, a reference electrode and a counter electrode; the software system is composed of an artificial intelligence algorithm based on an SVR model, wherein the small electrochemical workstation is based on an electrochemical analog front end AD5941, a single chip is integrated with a complete three-electrode system chain, and the system is a novel solution which is high in precision and low in power consumption and can be expanded into a multi-parameter measurement system. The working electrode is a BDD electrode and can generate a large number of hydroxyl radicals with strong oxidizing property to thoroughly oxidize organic matters in the solution, and the electric quantity passing through the working electrode in the oxidation process is linearly related to the quantity of the organic matters in the solution. The main controller calculates a COD value and completes precision compensation through an SVM model, and data is transmitted to a self-built database through NB-IoT for a user to check in real time.

Description

technical field [0001] The invention relates to a COD electrochemical measurement method, in particular to a portable and miniaturized COD on-line measurement device and method. Background technique [0002] Chemical Oxygen Demand (COD) refers to the amount of oxidant consumed by chemically oxidizing reducing substances (generally oxides) in water samples under certain conditions. COD is an important comprehensive indicator of water quality assessment and an important water quality parameter for the implementation of total pollution discharge control in my country. Effective control of water pollution depends on the rapid and efficient detection of COD. For example, the treatment of high-concentration refractory organic wastewater involves many industrial fields such as pharmaceuticals, printing and dyeing, chemicals, pesticides, and rubber. Wastewater has complex components, high concentration of organic matter, toxic and refractory substances, difficult treatment, high in...

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Problems solved by technology

[0008] In order to overcome the deficiencies in the prior art, such as long detection time, high detection cost, complicated operation, difficulty in realizing online measurement, secondary pollution, and high requirements for water samples to be tested, the present invention proposes a portable small The device and method adopt the BDD electrode which is very easy to generate strong oxidizing hydroxyl radicals as the working electrode, with ultra-low power consumption, high integration circuit and high reliability data fusion algorithm, aiming to complete the river water pond or factory sewage outlet Long-term high-precision COD online monitoring

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