Degradation and transformation of tylvalosin by newly selected Providencia vermicola strain CT1: removal efficiency, pathways, mechanisms, and actual applications.

Tylvalosin (TAT) is a widely used veterinary antibiotic whose residual contaminants promote antibiotic resistance and pose potential risks to human health and ecosystems. This study successfully isolated and identified a TAT-degrading bacterial strain, Providencia vermicola strain CT1, through 16S rRNA analysis and biochemical tests. Under optimized conditions (30 °C, pH = 6, initial TAT concentration of 300 mg/L, and bacterial culture volume of 50 mL), strain CT1 achieved a TAT degradation percentage of 97.

Isolation of native microorganisms from Shengli lignite and study on their ability to dissolve lignite.

To more greenly and efficiently utilize the abundant lignite resources and explore the microbial degradation and transformation potential of lignite for its environmentally friendly and resourceful utilization, Shengli lignite from the Hulunbuir region of Inner Mongolia, China, was selected as the research subject. Through the dilution plating method and streaking method, 31 native microorganisms were successfully isolated from the Shengli lignite, including 16 bacteria and 15 fungi. After microbial coal dissolution experiments, it was found that certain microorganisms have a significant dissolving effect on lignite, with some bacterial and fungal strains showing strong dissolution capabilities.