An integrated equipment for resource utilization and safe discharge of high-salt nitrogen-containing organic wastewater

Abstract

The invention provides an integrated equipment for recycling and safe discharge of high-salt nitrogen-containing organic wastewater, comprising a battery body, the photocatalytic oxidation device, and an evaporative crystallization device at the input end of the photocatalytic oxidation device, and the evaporation and crystallization device. The output end of the crystallization device is also provided with a biochemical treatment device, the output end of the biochemical treatment device is provided with a microbubble catalytic ozone oxidation device, and the output end of the microbubble catalytic ozone oxidation device is provided with a pre-denitrification grading biological denitrification device. In the present invention, the use of a multi-stage photocatalytic oxidation device can oxidize organic matter to complete mineralization in a high-salt environment, remove ammonia nitrogen, with low energy consumption and no secondary pollution. Nitrogen is converted into nitrate nitrogen, and the biodegradability of wastewater is improved at the same time, and then through the pre-denitrification grading biological denitrification device to remove ammonia nitrogen, nitrate nitrogen, COD multi-pollution factors in the wastewater, the operation is stable, and the safe utilization of resources can be realized. .

Description

technical field [0001] The invention relates to the technical field of wastewater treatment equipment, in particular to an integrated equipment for resource utilization and safe discharge of high-salt nitrogen-containing organic wastewater. Background technique [0002] The treatment of high-salt nitrogen-containing organic wastewater is a major environmental protection problem facing industrial development at this stage, mainly involving fine chemical industries such as pesticides, pharmaceuticals, dyes and their intermediates. It is the nitrogen-containing organic matter in industrial wastewater that often causes the total nitrogen in the tail water to exceed the standard). At the same time, more than 2 million tons of waste salt is produced every year, and the salt residue is mixed with organic pollutants and it is difficult to recycle it. According to the disposal of hazardous waste, the cost of ton of salt treatment is as high as 3,000 yuan. In fact, most of the waste s...

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Problems solved by technology

[0005] The invention provides an integrated equipment for resource utilization and safe discharge of high-salt nitrogen-containing organic wastewater, which is used to solve the high-salt nitrogen-containing organic wastewater discharged from the production of industrial enterprises at present. The condensate after evaporation and crystallization still contains a large amount of synthetic organic matter and organic solvents, most of which are biologically toxic and difficult to biodegrade, especially triazoles, pyrimidines, pyridines, DMF, dimethylamine and other nitrogen-containing organic compounds. These nitrogen pollutants are difficult to pass through biochemical The treatment makes the total nitrogen up to the standard, and domestic industrial water advanced treatment often adopts Fenton oxidation, biological filter BAF, membrane treatment, etc., but there are problems of low COD removal efficiency, unstable operation, and no enhancement of organic nitrogen conversion and removal. The current equipment also has technical problems of high investment cost and high operating cost

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