Dehydration agent suitable for sludge land utilization and application thereof

CN119774852APending Publication Date: 2025-04-08SHANGHAI NATIONAL ENGINEERING RESEARCH CENTER OF URBAN WATER RESOURCES CO LTD +1
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Patent Information

Application Number
CN202411842388.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-13
Publication Date
2025-04-08

AI Technical Summary

Technical Problem

In the existing sludge treatment technology, the dehydration efficiency is low, resulting in large energy consumption and high treatment costs. The commonly used polymers during sludge treatment may cause environmental risks.

Method used

Provide a new type of dehydration agent suitable for soil sludge land use, including wood ash, flocculants (such as magnesium salt, iron salt, aluminum salt) and construction powder. By combining soil harmless aids, it avoids soil sludge land use performance and improves soil sludge land use.

Benefits of technology

This dehydration agent can significantly reduce the moisture content of the sludge, reduce its moisture content by half, reduce the volume of the sludge, reduce follow-up treatment costs, and increase the fertility of the sludge land, and reduce environmental risks.

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Abstract

According to the dewatering agent suitable for sludge land utilization and the application of the dewatering agent, the agent is compounded with a coagulant aid harmless to soil, soil hardening caused by addition of PAM is avoided, the sludge land utilization performance is improved on the premise that the sludge dewatering efficiency is not affected, the water content is reduced, the water content of sludge is reduced by half, and the sludge volume is reduced; therefore, the subsequent treatment cost is reduced. In addition, the dewatering agent can improve the fertility of sludge land, and can be applied to dewatering treatment of municipal sludge.
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Citation Information

Patent Citations

  • Sludge dewatering agent and use method thereof

    CN107032580A

  • Sludge conditioner and sludge dewatering method thereof

    CN101633549A

  • Inorganic composite conditioner for effective sludge dehydrating

    CN102452782A

  • Method for deeply dehydrating sludge by utilizing cullet

    CN103011544A

  • Sludge high-dry dehydration conditioning method

    CN104788001A