title: Efficient Anaerobic Metformin Biodegradation in an AnMBR Driven by a Cross-Feeding Consortium: Novel Pathways,  Enzymes, and Toxicity Dynamics
design: To characterize temporal shifts in microbial community structure and to resolve functional features of key microorganisms under different influent metformin loadings, sludge samples were collected from the AnMBR on Days 0, 40, 60, and 92 for metagenomic analysis.