Patent ID: 11858836
Assignee: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
Field: Environmental technology (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A method, comprising:
dewatering an iron-containing sludge, that includes organic matter, to obtain an iron-containing sludge cake;
performing a pyrolysis treatment by pyrolyzing the iron-containing sludge cake, under an atmosphere of a protective gas at 600 to 1000° C. for 30 to 90 minutes, and the protective gas comprises at least one of nitrogen gas and argon gas, to obtain an iron-containing sludge pyrolysis residue that includes zero-valent iron, divalent iron compounds, trivalent iron compounds, and biochar;
adjusting a pH of a first sludge to be 1 to 6.5 to obtain a first treated sludge;
adding the iron-containing sludge pyrolysis residue to the first treated sludge, and stirring for 2 to 8 minutes to obtain a second treated sludge; and
adding a first oxidant to the second treated sludge, and stirring for 15 to 50 minutes, to obtain a conditioned sludge.