低表观气速间歇曝气AGS-SBR系统处理实际生活污水

实验选用3个SBR反应器接种污水厂活性污泥，R1采用高表观气速（SGV）连续曝气，R2采用低SGV连续曝气，R3采用低SGV间歇曝气，在低碳氮比的实际生活污水中培养好氧颗粒污泥，探究不同SGV曝气条件对好氧颗粒污泥的形成及系统处理效果的影响.经过120d的培养，R1、R2和R3中颗粒粒径分别为（754±78），（812±86），（1183±93）μm，R3的脱氮除磷效果优于R1和R2.结果表明，应用低SGV间歇曝气策略在低碳氮比实际生活污水中培养的好氧颗粒污泥脱氮除磷性能良好，且系统中反硝化聚磷菌（DPAO）占聚磷菌（PAO）比例为24.75%.

Low superficial gas velocity intermittent aeration AGS (aerobic granular sludge) SBR system oftreating domestic wastewater

Three SBR reactors were used to inoculate activated sludge from sewage treatment plants in this experiment. R1was used high SGV continuous aeration, R2 was used low SGV continuous aeration, and R3 was used low SGV intermittent aeration to cultivate aerobic granular sludge in actual domestic sewage, and explore the effect of different SGV aeration conditions on the formation of aerobic granular sludge and the effect of system processing. After 120 days of incubation, the particle sizes of R1, R2 and R3 were (754±78)μm, (812±86)μm and (1183±93)μm, respectively. The denitrification and phosphorus removal effect of R3 was better than that of R1 and R2. The results show that the application of low SGV intermittent aeration strategy can realize the cultivation of aerobic granular sludge in actual domestic sewage, and the system had good denitrification and phosphorus removal performance. The proportion of denitrifying phosphorus-removing organisms (DPAO) to phosphorous accumulating organisms (PAO) was 24.75%.