Changes in the structure of anoxic biofilm microbiota with gradually decreasing filling ratio

The strategy of increasing the proportion of anammox autotrophic nitrogen removal and enhancing the enrichment of anammox bacteria urgently needs to be broken through.提升厌氧氨氧化（Anaerobic Ammonium Oxidation）自养脱氮占比并强化厌氧氨氧化菌富集的相关策略，亟需取得突破性进展。