不同好氧颗粒污泥脱氮性能的研究

his paper investigated nitrogen removal ability and nitrogen removal mechanism of aerobic granular sludge in three internal-circulate sequencing batch airlift reactors (IC-SBARs), the three reactors fed with different substrate including glucose, acetate and ethanol, respectively. The results showed that with the influent of 1000 mg/L COD, 60mg/L NH3-N and 15 mg/L TP, the nitrogen removal efficiencies of the three reactors could be kept stable in the long-term experiments. The granular fed whit glucose had the best total nitrogen remove efficiency of 95%, and the acetate, ethanol feed granular had lower efficiencies of 87% and 55%. The effect of the total nitrogen removal efficiencies was depend on the speed of denitrification, the granular sludge fed with glucose and acetate had a befitting condition for the increase of the denitrification bacteria, so they had a better total nitrogen removal efficiencies than the granular fed with ethanol.