NEW METHOD OF SULFADIAZINE RESIDUE BIODEGRADATION IN POULTRY MANURE BY SPORE-BOUNDING LACCASE

Antibiotics have been used in livestock farming worldwide. In poultry farming, sulfonamide antibiotics are mainly used to inhibit microbial infection. Sulfadiazine (SDZ) is one type of sulfonamide that is secreted into the ecosystem through feces and urine owing to its low adsorption and degradation in the animal intestine. In this study, the spore-bound laccase from the Bacillus sp. strains was investigated for its potential for degradation of SDZ. The highest laccase activity was selected to degrade the SDZ residue in the poultry feces. The results demonstrated that the spore-bound laccase of Bacillus sp. PM45 successfully reduced the residue of SDZ in poultry manure by 98.00±0.50 %. This work gained new knowledge and the method is cost-effective and more eco-friendly for antibiotic residue treatment.