A pretreatment method for simultaneously improving sludge dewatering performance and reducing biological risk

By combining ferrous ions and peracetic acid and precisely controlling the reaction conditions, the problems of dewatering performance and biological risk control in sludge treatment have been solved, achieving efficient sludge dewatering and reduction of biological risks, especially the removal of ARGs and MGEs.

CN122166988APending Publication Date: 2026-06-09INNER MONGOLIA UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
INNER MONGOLIA UNIVERSITY
Filing Date
2026-05-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing sludge treatment methods struggle to simultaneously improve dewatering performance and control biological risks, particularly in the poor removal of antibiotic resistance genes (ARGs) and mobile genetic elements (MGEs). Furthermore, conventional methods may lead to excessive fragmentation of sludge particles, which in turn worsens dewatering performance.

Method used

By using a combination of ferrous ions (Fe2+) and peracetic acid (PAA), the reaction mixture is formed at room temperature by controlling the reaction time. The molar ratio of Fe2+/PAA and the reaction time are precisely controlled to achieve the oxidative degradation of EPS in sludge and the formation of iron-organic complexes, thereby simultaneously improving dewatering performance and reducing biological risks.

Benefits of technology

It achieves a significant improvement in sludge dewatering performance, with ARGs and MGEs removal rates exceeding 95%, and pathogen abundance reduced by 14.5%-18.4%, effectively reducing the risk of antibiotic resistance transmission. It is also simple to operate and environmentally friendly.

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Abstract

The application relates to a sludge treatment method, and discloses a pretreatment method for synchronously improving sludge dewatering performance and reducing biological risk, which aims at solving the problem that traditional sludge treatment methods are difficult to simultaneously improve dewatering efficiency and control biological risk. 2+ The pretreatment method comprises the following steps: under stirring, Fe 2+ and peroxyacetic acid are sequentially added into residual activated sludge to be treated to form a reaction mixture; and the reaction mixture is reacted at room temperature, and the reaction is completed after 10-60 minutes. The application solves the problem that traditional methods are difficult to simultaneously improve dewatering efficiency and control biological risk, has the advantages of double-effect synergy, high efficiency, controllability, green environmental protection and the like, and has wide application prospects in the fields of sludge safe disposal and resource utilization. The application is applied to the technical field of sludge treatment.
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