SUFR系统中活性污泥特性及反硝化除磷稳定性

通过试验考察了螺旋升流式反应器（SUFR）系统中活性污泥的特性及ρ（COD_Cr）和污泥龄（SRT）对反硝化除磷稳定性的影响. 结果表明:SUFR系统的活性污泥指数（SVI）介于50 ～150 mL/g；污泥活性均在0.75以上；污泥颗粒直径多在0.7～0.9 mm，属于小颗粒污泥；污泥沉降性能良好. 污泥的比硝化速率（SNR）约为1.95 mg/（g·h），前0.5 h的比厌氧释磷速率（SPRR_0.5）为26.82 mg/（g·h），比好氧吸磷速率（ASPUR）为6.04 mg/（g·h），比缺氧吸磷速率（NSPUR）为4.27 mg/（g·h），污泥产率系数约为0.60，对氮磷均有较好的去除能力. SUFR系统反硝化吸磷作用对ρ（COD_Cr）和SRT都有一定的抗冲击能力，系统除磷效果对进水ρ（COD_Cr）的耐冲击负荷能力较高，但长期在较低SRT下运行会使系统内活性污泥量急剧降低，导致处理效果下降. 

Characteristics of Activated Sludge and Stability of Denitrifying Phosphorus Removal in SUFR System

The characteristics of activated sludge and effects of influent CODCr and SRT on stability of denitrifying phosphorus removal in a SUFR system were studied.The results obtained were as follows: the SVI was between 50 to 150 mL/g;sludge activity was all over 0.75;sludge grain diameter was mostly between 0.7 to 0.9 mm,which was small grain sludge;and,sludge settling ability was good.Further results were as follows: SNR of the sludge was about 1.95 mg/(g.h);SPRR0.5 was 26.82 mg/(g.h);ASPUR was 6.04 mg/(g.h);NSPUR was 4.27 mg/(g.h);the sludge yield coefficient was about 0.60;and,the SUFR system had a higher removal ability of nitrogen and phosphorus.Denitrifying phosphorus removal in the SUFR system had some shock resistance of influent CODCr and SRT.Phosphorus removal effect had a higher shock resistance of influent CODCr,but the phosphorus removal effects would be decreased over long-term operation on a lower SRT because of a dramatic decrease of activated sludge quantity.