US 12,318,726 B2
Harmless and resourceful treatment method for antibiotic residue
Weizhen Liu, Guangzhou (CN); Shaoyuan Liu, Guangzhou (CN); Hongyi Huang, Guangzhou (CN); Zhang Lin, Guangzhou (CN); and Minlin Mao, Guangzhou (CN)
Assigned to South China University of Technology, Guangzhou (CN)
Filed by South China University of Technology, Guangzhou (CN)
Filed on Jul. 23, 2024, as Appl. No. 18/781,947.
Application 18/781,947 is a continuation of application No. PCT/CN2023/140106, filed on Dec. 20, 2023.
Claims priority of application No. 202311162066.6 (CN), filed on Sep. 11, 2023.
Prior Publication US 2025/0083087 A1, Mar. 13, 2025
Int. Cl. B01D 53/00 (2006.01); C01B 32/30 (2017.01); C09K 17/14 (2006.01); C10B 53/00 (2006.01)
CPC B01D 53/002 (2013.01) [C01B 32/30 (2017.08); C09K 17/14 (2013.01); C10B 53/00 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A harmless and resourceful treatment method for antibiotic residue, comprising:
step (1), pre-treatment: drying and crushing the antibiotic residue to obtain a dry powder of antibiotic residue;
step (2), pyrolysis reaction: heating the dry powder of antibiotic residue obtained in the step (1) to a temperature of 400-800° C. to perform an isothermal pyrolysis treatment under an inert a carbon dioxide (CO2) atmosphere; and
step (3), product collection: collecting, in a condensing device, condensable gas in volatile substances released during the pyrolysis treatment in the step (2) to obtain a condensable bio-oil product; collecting, in a gas bag, non-condensable gas in the volatile substances to obtain pyrolysis gas; and collecting residual substances obtained after the pyrolysis treatment as a biochar product;
wherein the antibiotic residue in the step (1) is a dehydrated and dried antibiotic residue of vancomycin, with a moisture content in a range of 50% to 80%;
wherein in the step (3), a yield of the condensable bio-oil product is in a range of 15% to 30%, and a yield of the biochar product is in a range of 30% to 50%, a component of the condensable bio-oil product comprises 5H-1-pyrindine and 2-acetyl-1-methylpyrrole, and a component of the obtained pyrolysis gas comprises methane (CH4), carbon monoxide (CO); and
wherein the bio-oil product is further utilized as a chemical crude oil product containing nitrogen; and the biochar product is further utilized for preparing activated carbon or is applied to contaminated soil for a soil remediation treatment.