Method for rapid elimination of water blackening and smell

Abstract

A method for rapid elimination of water blackening and smell disclosed in the invention, comprises the following steps: pressurizing pure oxygen to 0.3 MPa or more, through a mixture, rapidly mixing the pressurized pure oxygen with the flow extracted from a body of water to be treated by an axial flow pump, so as to obtain high-concentration oxygen-dissolved water; arranging a plurality of rotarynozzles in the body of water to be treated, intensively mixing the high-concentration oxygen-dissolved water output by the mixture with the body of water to be treated through the rotary nozzles to allow the dissolved oxygen concentration of the body of water to be treated to reach more than 20mg/L. According to the invention, by utilizing the pressurization of pure oxygen and the combination of static pressure and dynamic pressure, the dissolved oxygen concentration of the body of water is increased rapidly. The invention has the advantages of high efficient at absorbing oxygen, action fast,and effect long, with good application prospect.

Description

technical field [0001] The invention relates to water environment restoration, which is a method for quickly eliminating black and odorous water bodies, and is especially suitable for urban landscape rivers and lakes that are severely polluted and cause black and odorous water bodies. Background technique [0002] In the process of social urbanization, due to the imperfect sewage collection and treatment system, a large amount of sewage enters water bodies such as rivers and lakes, resulting in the exhaustion of dissolved oxygen in the water body, and serious "black odor" phenomenon occurs in the water body. Theoretically, 1mg / L BOD needs to consume 1.5-2mg / L dissolved oxygen, 1mg / L NH 3 -N needs to consume 4.5mg / L of dissolved oxygen, and the dissolved oxygen of rivers is generally only about 8mg / L under normal conditions. Therefore, high concentrations of BOD and NH 3 -N will quickly deplete the dissolved oxygen in the water body of the river or lake, making the water bod...

AI Technical Summary

Problems solved by technology

However, in the treatment of heavily polluted rivers and lakes to eliminate black and odor, the efficiency of conventional bubble aeration or hydraulic aeration is relatively low, and it takes a long time to eliminate black and odor

For example, Shanghai used micro-bubble pure oxygen aeration in Suzhou Creek to eliminate black and odor, but gave up because of unsatisfactory results.

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