High-salt nitrogen-containing organic wastewater recycling and safe discharging integrated equipment

Abstract

The invention provides high-salt nitrogen-containing organic wastewater recycling and safe discharging integrated equipment, which comprises a battery body and a photocatalytic oxidation device, wherein an evaporative crystallization device is arranged at the input end of the photocatalytic oxidation device, a biochemical treatment device is further arranged at the output end of the evaporative crystallization device, the output end of the biochemical treatment device is provided with a microbubble catalytic ozonation device, and the output end of the microbubble catalytic ozonation device is provided with a pre-denitrification grading biological denitrification device. According to the invention, by using a multi-stage photocatalytic oxidation device, organic matters can be oxidized in a high-salt environment until the organic matters are thoroughly mineralized, so that ammonia nitrogen is removed, the energy consumption is low, and secondary pollution is avoided; and by arranging a multi-scale microbubble catalytic ozonation device, organic nitrogen can be efficiently converted into nitrate nitrogen while the biodegradability of wastewater is improved, and ammonia nitrogen, nitrate nitrogen and COD multi-pollution factors in the wastewater are removed through a pre-denitrification grading biological denitrification device, so that 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 the present 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 are produced every year. Organic pollutants are mixed in the salt slag, making it difficult to recycle it into resources. Disposal as hazardous waste costs more than 3,000 yuan per ton of salt. In fact, most of the waste salt has no way out...

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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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