Experimental device and method for studying the change of degradation coefficient of organic matter under hydrodynamic conditions

Abstract

The invention discloses a test device and method for studying the change of organic matter degradation coefficient under hydrodynamic conditions. The test device includes an annular water tank, a water tank, a water pump, a frequency conversion box, a temperature recorder and a flow rate measuring instrument; the annular water tank and the water tank form a circulating water flow system through a water pump, the water outlet of the annular water tank is connected with the water tank, and the water inlet of the water pump is connected with the water tank. The water outlet is connected to the water inlet of the annular water tank, the water pump is electrically connected to the frequency conversion box, and the temperature recorder and the flow rate measuring instrument are all arranged in the annular water tank. The invention can realize different hydrodynamic conditions, reflect the hydraulic characteristics of natural rivers, and the measured organic matter degradation coefficient has good representativeness and better accuracy. In addition, the present invention can also realize the prediction of the degradation coefficient of organic matter in natural rivers through routine measurements of natural rivers such as water depth, flow velocity, and water temperature.

Description

technical field [0001] The invention belongs to the technical field of water body research in urban rivers, and relates to the determination of the degradation coefficient of organic matter in water bodies, in particular to a test device and method for studying the degradation coefficient of organic matter under different hydrodynamic conditions, so as to realize the change of the degradation coefficient of organic matter in urban river water Simulation of the process. Background technique [0002] In the past two decades, with the development of industrialization and urbanization, a large amount of industrial wastewater and domestic sewage have not been discharged up to the standard, leading to the intensification of river pollution. At present, organic matter pollution is one of the main pollution types of urban river water pollution. Excessive concentration of organic pollutants in water will lead to toxicity in water, and will cause potential harm to aquatic organisms a...

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Problems solved by technology

The estimation method based on empirical formula is too subjective, it is difficult to reflect the internal form of pollutant degradation, and it is difficult to guarantee the reliability of the calculation results; the estimation method based on conventional data mainly uses the analogy analysis method, but the analogy conditions of the river are difficult to completely match , the estimated results are easily affected by analogy conditions; the indoor simulation method has high requirements for test water, test flow conditions, and pollutant characteristics. If the test conditions are greatly different from those of natural rivers, it will easily lead to test errors; Although the analysis of measured data can truly reflect the characteristics of the river in the natural state, the workload is heavy and it is difficult to carry out the analysis in the whole river section.

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