Method for improving dewatering performance of aerobic granular sludge by combining physical and chemical methods

By combining physical crushing and advanced oxidation reactions, the Fenton reaction is used to destroy the extracellular polymer structure of aerobic granular sludge, solving the problem of difficulty in effective dehydration in the prior art, and significantly improving the dehydration efficiency and treatment capacity of the sludge.

CN119241028APending Publication Date: 2025-01-03浙江工业大学绍兴研究院 +1
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Patent Information

Application Number
CN202411483888.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-23
Publication Date
2025-01-03

AI Technical Summary

Technical Problem

The prior art is difficult to effectively destroy the extracellular polymer structure in aerobic granular sludge, and cannot significantly improve its dehydration efficiency, resulting in the dehydration efficiency being unable to be significantly improved.

Method used

Combining the physical methods of filtration and mechanical crushing with advanced oxidation reactions, using the Fenton reaction formed by divalent iron ions and hydrogen peroxide, it generates hydroxyl radicals under acidic conditions, destroys the extracellular polymer structure and releases bound water, and then centrifuges Dehydration achieves efficient dehydration.

Benefits of technology

The dehydration efficiency of aerobic granular sludge is improved, the moisture content of the sludge is reduced, thereby reducing storage, transportation and treatment costs, and enhancing the sludge treatment capacity.

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Abstract

The invention discloses a method for improving the dewatering performance of aerobic granular sludge by combining physical and chemical methods, aiming at the special dense structure of the aerobic granular sludge, the structure of an extracellular polymeric substance is destroyed by adopting a physical crushing mode, and then the sludge is conditioned by adopting an advanced oxidation reaction, so that the dewatering performance of the aerobic granular sludge is improved. And finally dewatering the aerobic granular sludge in a centrifugal dewatering manner. Compared with unpretreated aerobic granular sludge, the method has the advantages that the moisture content is reduced by 6-10%, the dewatering performance of the aerobic granular sludge can be effectively improved, and a new idea and reference are provided for subsequent treatment of the aerobic granular sludge.
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Citation Information

Patent Citations

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  • Method for strengthening anaerobic fermentation acid production by mechanically crushing aerobic granular sludge structure

    CN116396987A

  • Method for sludge dewatering using kitchen waste to synergistically enhance anaerobic biological acidification and low-temperature thermal hydrolysis of excess sludge

    US20210323888A1

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  • Method for strengthening anaerobic fermentation acid production by mechanically crushing aerobic granular sludge structure

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