Anaerobic-Anoxic Aerobic Process for Municipal Wastawater Treatment
厌氧-缺氧-好氧处理城市废水

A pilot reactor of anaerobic-anoxic-aerobic process was operated to treat municipal wastewater.The results indicated that the process was able to remove 90% total COD, 89% TSS, 93% VSS, and the removal rates of nitrogen and phosphorus were 80% and 40%, respectively.In anoxic phase, the maximum number ( MPN ) of Thiobacillus denitrificans, the maximum denitrification rate, the maximum concentration of oxidizing Na2S, and sludge loading rate of S2- were 1.1×108/g VSS, 3.6mg NO3-/g VSS·h, 1750mg/L and 25mg S2-/ gVSS·d,respectively.