Research on Efficiency of Improved IFAS Process in Treating Rural Sewage

Based on researches of a wastewater treatment plant for rural sewage treatment in Tongzhou District, Beijing city, efficiency of IFAS process was studied to support its broad-wide use in rural area. The results showed that, for the influents with COD, ammonia, TN and TP levels of 60-203mg/L, 9.5-40mg/L, 16-45mg/L and 1.2-4.7mg/L, highest removals of 91%, 98%, 78% and 93% can be obtained with levels of effluents below than 40mg/L, 1.5mg/L, 15mg/L and 1.0mg/L. Removals of the contaminants were low under low temperatures in winters.