Specific gravity of activated sludge was increased by proliferation of phosphorus accumulating organisms (PAOs), which helped to resume state of limited sludge bulking after excessive sludge bulking.

聚磷菌的增殖使活性污泥比重增大，有助于发生恶性膨胀的污泥逐渐恢复沉降性能，维持活性污泥微膨胀。

youdao

My sensing is that Gen McCrystal did not have very good relationships or trust with his former PAOs.

FORBES: How David Petraeus Mastered the Media

By the time PAOs are advising three and four star officers, they are experienced and should know what they are talking about.

FORBES: How David Petraeus Mastered the Media

Time and again I've seen it in writing where military PAOs and JAGs sabotage wartime info ops by invoking the 1948 Smith-Mundt Act.

CENTERFORSECURITYPOLICY: Smith-Mundt does NOT apply to DoD