Imidazole aldehyde waste water treatment process and operating method thereof

Abstract

The invention discloses an imidazole aldehyde waste water treatment process and an operating method thereof, and belongs to the technical field of waste water treatment. The treatment process provided by the invention comprises primary wet oxidation, primary nanofiltration, primary freezing, secondary wet oxidation, secondary nanofiltration, secondary freezing and evaporative crystallization, wherein a biochemical area comprises a pH neutralizing pool, a biochemical adjusting pool, a UASB reactor, an A / O pool, a secondary sedimentation pool and a mixed sedimentation pool. Through physical and chemical pretreatment of midazole aldehyde waste water, the COD concentration can be greatly reduced to 3000 mg / L, pure organic P can be recycled, and the residual organic P is transformed into inorganic P, so that removal of P from the midazole aldehyde waste water by the biochemical area is enhanced. After waste water subjected to physical and chemical pretreatment and domestic waste water are mixed, the COD and the P are removed from the waste water through biochemical treatment; and PAC and PAM are emergently added in the mixed sedimentation pool to enhance removal of COD and P precipitate, so that reduction of the biochemical action of the active sludge in the biochemical area in winter is avoided, and the midazole aldehyde waste water is efficiently removed.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment, and more specifically relates to an imidazole aldehyde wastewater treatment process and an operating method thereof. Background technique [0002] Chemical wastewater is very harmful and highly toxic, especially high-salt, high-COD and high-phosphorus wastewater. High salinity in wastewater has adverse effects on microbial systems. Conventional activated sludge systems are sensitive to the impact of inorganic salts. Increasing salinity will reduce microbial activity. The adapted and stable activated sludge system has a limited range of adaptation to salinity. A large number of studies have shown that: salt can inhibit the metabolism of microorganisms, and in severe cases, it will cause cell dehydration and finally plasmolysis, and the death of microorganisms; on the other hand, the density of high-salt wastewater is higher than that of normal wastewater, and the buoyancy produced Th...

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Problems solved by technology

[0006] Aiming at the problem that existing water treatment processes have poor treatment effects on high-salt, high-phosphorus, and high-COD wastewater, the present invention provides a treatment process for imidazole aldehyde wastewater and its operating method. The characteristics of imidazole aldehyde wastewater are salt content, phosphorus content Both COD and COD are very high, and conventional water treatment methods are difficult to effectively treat. The present invention provides a process and operation method for resource recovery of phosphorus, efficient and stable treatment of wastewater with this characteristic, and can effectively oxidize and degrade COD to 3000mg / L, at the same time, it can convert organic P in imidazole aldehyde into inorganic P, and realize the efficient precipitation of inorganic P in combination with the subsequent freeze filtration process

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