Study on Treatment of Domestic Wastewater by Biological Aerated Filter

Abstract

Biological aerated filter (BAF) is a simple and efficient low-consumption urban wastewater treatment technology in line with China's national conditions, with the characteristics of land area, high treatment efficiency and convenient operation and management. In this paper, the experimental research and theoretical analysis of BAF treatment of domestic sewage are carried out. The results show that the time required to start the hanging film of BAF is short, and the removal rate of COD and NH4-N is stable at about 75% and 60% respectively after about 24 days. When the aeration 0.25m3/h was maintained, the average removal rate of COD reached 88.73%, the average removal rate of NH4-N reached 65.49%, and the average removal rate of TP was 89.98%.