P corresponds to partial nitrification sludge A corresponds to anammox sludge Raw sequence reads

The study investigated the abundance of ammonia oxidizing bacteria , nitrite oxidizing bacteria , and denitrifying bacteria in partial nitrification sludge under different operational conditions, as well as the abundance of anammox bacteria and denitrifying bacteria in anammox sludge under varying conditions. It elucidated the changes in microbial community abundance across different operational scenarios and their impact on system performance.