Purifying treatment system for industrial wastewater

Abstract

The invention discloses a purifying treatment system for industrial wastewater. The purifying treatment system is mainly used for conducting purifying treatment on COD (chemical oxygen demand) in the industrial wastewater. The system comprises a water collecting well, a coarse screen, a primary precipitation tank, a pH value regulating tank, a microbial oxidation battery-COD decomposition power generation device, a nitration reaction tank, a biological denitrification tank, a secondary precipitation tank and a water purifying tank. According to the system, the characteristic that shewanella can oxidatively decompose organic matter to generate biological electric energy is creatively utilized, a microbial electrode attached with a shewanella strain is taken as a negative electrode, a ruthenium dioxide electrode is taken as a positive electrode, and when sufficient oxygen exists, the shewanella can oxidatively decompose the organic matter in a solution through a biochemical reaction and generate free electrons, carbon dioxide and water to achieve the purpose of removing the organic matter in the wastewater through decomposition. Meanwhile, the microbial electrode and the ruthenium dioxide electrode form a primary battery effect in the solution, so that the free electrons move directionally, and then utilizable currents are generated.

Description

technical field [0001] The invention relates to a purification treatment system 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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