Graded coupling advanced treatment system and method for high-concentration formaldehyde wastewater

By employing a graded, coupled deep treatment system, real-time data acquisition, and modular processing, including alkaline heating conversion, ozone oxidation, and biochemical mineralization, the biological inhibition problem of high-concentration formaldehyde wastewater has been solved, achieving efficient and stable wastewater treatment results.

CN121872609APending Publication Date: 2026-04-17INNER MONGOLIA HUINENG YAONING TECHNOLOGY DEVELOPMENT CO LTD
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Patent Information

Application Number
CN202610158108.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-04
Publication Date
2026-04-17

AI Technical Summary

Technical Problem

High-concentration formaldehyde wastewater has strong biological inhibition properties, rendering existing biochemical treatment technologies ineffective and unable to remove it effectively. Furthermore, the depolymerization reaction of trioxymethylene components causes drastic fluctuations in formaldehyde concentration, affecting the microbial degradation capacity and the quality of the effluent.

Method used

The system employs a graded, coupled deep processing system, including a data acquisition module, a detoxification and conversion module, a buffer conditioning module, an oxidation enhancement module, and a biochemical mineralization module. Through real-time data acquisition and steps such as alkaline heating conversion, ozone oxidation, and small molecule organic acid metabolism, the toxicity of formaldehyde is reduced step by step. Finally, the effluent verification module ensures that the effluent meets the standards.

Benefits of technology

It effectively overcomes the biological inhibition of formaldehyde, significantly reduces wastewater toxicity, enhances the system's shock resistance and operational economy, and ensures that the effluent meets discharge standards.

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Abstract

The invention relates to the technical field of industrial wastewater treatment and recycling, in particular to a graded coupling advanced treatment system and method for high-concentration formaldehyde wastewater. A data acquisition module acquires the formaldehyde concentration of inlet water in real time and transmits the formaldehyde concentration to a detoxification conversion module; the detoxification conversion module controls alkali addition and heating reaction according to the concentration data, so that formaldehyde is converted into an intermediate product; the buffer conditioning module balances water quality through cooling and homogenization; the oxidation promoting module enables the intermediate product to react with ozone to generate small-molecular organic acid under the action of a catalyst; the biochemical mineralization module metabolizes organic matters by using microorganisms; the water outlet verification module detects water quality and triggers a discharge signal. According to the invention, toxicity is reduced step by step through a graded coupling process, biodegradability is improved, the technical problem that direct biochemical treatment of high-concentration formaldehyde wastewater is not feasible is solved, and efficient deep treatment and stable up-to-standard discharge are realized.
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