Purification treatment method of industrial wastewater

Abstract

The invention discloses a purification treatment method of industrial wastewater. Wastewater is treated sequentially through a water collecting well, a coarse bar screen, a primary sedimentation tank, a pH adjusting tank, a microbial oxidation battery-COD decomposition and power-generation device, a nitrification reaction tank, a biological nitrogen removal tank, a secondary sedimentation tank and a water purification tank. The purification treatment method creatively utilizes a characteristic that Shewanella oneidensis can oxidize and decompose organic matters to generate bio-electric energy; a microbial electrode attached with Shewanella oneidensis strain is used as a cathode, and a ruthenium dioxide electrode is used as an anode, so when sufficient oxygen exists, the Shewanella oneidensis can oxidize and decompose the organic matters in a solution through biochemical reaction and produce free electrons, carbon dioxide and water, so as to achieve the purposes of decomposing and removing the organic matters in wastewater; meanwhile, the microbial electrode and the ruthenium dioxide electrode form a galvanic effect in the solution, so that the free electrons can perform directional movement to generate available current.

Description

technical field [0001] The invention relates to a purification treatment method for removing COD in industrial waste water, which belongs to the waste water treatment field in environmental protection. Background technique [0002] With the development of our country's economy and population growth, as well as the discharge of a large amount of industrial wastewater that does not meet the standards, most of the domestic wastewater is discharged directly without treatment, and the vast rural areas use chemical fertilizers, pesticides and other agricultural chemicals unreasonably, which makes the source water of rivers serious. pollution, resulting in deterioration of environmental quality. 63.1% of the Yangtze River, Yellow River, Songhua River, Pearl River, and Huaihe River in my country's main river basins exceed the third-class standard of surface water and lose their drinking water function. Among them, the fourth-class water quality is 18.3%, and the fifth-class water qu...

AI Technical Summary

Problems solved by technology

[0006] (1) The advantages of chemical treatment of COD are low equipment cost, good treatment effect, and simple operation; the disadvantage is that chemical agents need to be continuously injected into the wastewater, and its operating cost is high. It is often used to treat wastewater with complex components

[0007] (2) The advantages of biochemical treatment of COD are high efficiency in removing dissolved or colloidal organic matter, good effluent quality, and good sludge settling performance; the disadvantage is that operation and management are more complicated, sludge swelling will occur, and the quality of raw water will be affected. High requirements, poor environmental temperature adaptability, large footprint, etc.

[0008] (3) The advantages of physical and chemical treatment of COD are good treatment effect and strong adaptability, but the cost of equipment is high, the operation is complicated, and the requirements for operators are high

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