高频交替OLR强化好氧颗粒污泥性能研究

本研究设置4个反应器R1、R2、R3和R4，分别采用恒定有机负荷率（OLR）和三个交替OLR方式运行，高低OLR分别为0.67/0.67、0.71/0.60、0.77/0.52、0.80/0.40gCOD/（L·d），以合成配水为基质，探究高频交替OLR对好氧颗粒污泥性能的影响，为提高好氧颗粒污泥的稳定性提供可行策略.由实验结果可知，R1、R2、R3和R4的完整性系数分别可达到87.26%、94.78%、96.29%、79.63%，四者的EPS含量（以VSS计）可达到81.04、109.46、115.28、139.56mg/g，PN/PS分别为4.75、7.49、8.28、3.26，表明m值（高OLR/低OLR）为1.48时有利于提高好氧颗粒污泥的结构稳定性.此外R1、R2、R3和R4在稳定时期的COD平均去除率分别为92.58%、91.52%、92.45%、92.52%，TP平均去除率分别为92.81%、93.35%、95.10%、61.01%，TN平均去除率分别为93.04%、92.24%、92.06%、85.32%，表明m值为1.48时好氧颗粒污泥去除污染物的效果最好.

Enhancement of aerobic granular sludge by high-frequency alternating OLR

In this study, four parallel cylindrical sequencing batch reactors, R1, R2, R3 and R4, were operated by constant organic loading rate (OLR) and three alternating OLR modes respectively, fed with synthetic water. Their high and low OLR were 0.67/0.67, 0.71/0.60, 0.77/0.52 and 0.80/0.40gCOD/(L?d) respectively. The effect of high-frequency alternating OLR on the performance of aerobic granular sludge was explored to provide feasible strategies for improving the stability of aerobic granular sludge. The results showed, the integrity coefficients of R1, R2, R3 and R4 could reach 87.26%, 94.78%, 96.29% and 79.63%, respectively. The EPS content (VSS) of the four reactors were 81.04, 109.46, 115.28 and 139.56mg/g and PN/PS were 4.75, 7.49, 8.28 and 3.26, respectively, indicating that the m value (high OLR/low OLR) of 1.48 was beneficial to improve the structural stability of aerobic granular sludge. In addition, the average COD removal efficiency of R1, R2, R3 and R4in the stable period were 92.58%, 91.52%, 92.45% and 92.52%, respectively. The average TP removal efficiency were 92.81%, 93.35%, 95.10% and 61.01%, respectively. The average TN removal efficiency were 93.04%, 92.24%, 92.06% and 85.32%, respectively, indicating that the aerobic granular sludge had the best effect of removing pollutants when the m value was 1.48.