Accelerating agent for rapid sedimentation of biochemical sludge as well as preparation method and application of accelerating agent

By extracting the polysaccharide material MI in the sludge and the metal organic frame MOF structure, a quick-setting agent mixed with MI-MOF compounds with MI vacancy and polymer was prepared, which solved the problem of poor sedimentation performance of high-concentration expansion sludge, significantly improved the sedimentation and adsorption performance of the sludge, and improved the sewage treatment effect.

CN119707238AActive Publication Date: 2025-03-28BLUE WHALE (XIAN) ENVIRONMENTAL TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510009815.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-03
Publication Date
2025-03-28
Estimated Expiration
2045-01-03

AI Technical Summary

Technical Problem

In existing sewage treatment facilities, the biochemical treatment capacity of high-concentration expanded sludge is poor, resulting in poor sludge settlement performance, difficulty in meeting the emission standards of the effluent water quality, and risk of sludge loss.

Method used

A quick-setting agent is used, and the preparation method includes extracting the polysaccharide material MI in the biochemical activated sludge as the imprint template molecule, combining ferrous salt, cobalt nitrate and sodium fluoride to form a MOF suspension, and reacting with the imprint template molecule, crosslinking agent and initiator under nitrogen protection to form a MI-MOF compound with a MI vacancy, and then mixing it with the polymer to prepare a MI-MOF a quick-setting agent.

Benefits of technology

Through the synergistic effect of MI-MOF compounds and polymers, this quick-setting agent significantly improves the sedimentation and adsorption performance of sludge, improves the treatment effect of sewage treatment facilities, reduces operating costs, and effectively prevents the reverse dissolution of metal ions.

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Abstract

The invention relates to an accelerator for rapid sedimentation of biochemical sludge as well as a preparation method and application of the accelerator. The preparation method comprises the following steps: extracting a polysaccharide substance MI from biochemical activated sludge as an imprinting template molecule; the preparation method comprises the following steps: dissolving ferrite, cobalt nitrate and sodium fluoride in water, and stirring to form a solution A; selecting imidazole-dicarboxylic acid, dissolving in a sodium hydroxide solution, and stirring to form a solution B; adding the solution B into the solution A for reaction to obtain MOF turbid liquid; transferring the MOF suspension into a reaction kettle under the protection of nitrogen, adding imprinting template molecules, a cross-linking agent and an initiator for reaction, freeze-drying a reaction mixture, and washing to remove the imprinting template molecules, so as to obtain an MI-MOF compound with an MI vacancy; and mixing the MI-MOF compound with the MI vacancy with a high-molecular polymer to obtain the MI-MOF accelerator. According to the accelerator, through the synergistic effect of the MI-MOF compound with the MI vacancy and the high-molecular polymer, the flocculation effect of the flocculant is greatly improved.
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