碳源对好氧颗粒污泥物理性状及除磷性能的影响

采用气提升内循环序批式反应器，分别以葡萄糖、乙酸钠、乙醇为碳源培养好氧颗粒污泥，考察了3种颗粒污泥的物理性状、除磷性能及除磷机理。结果表明：3种颗粒污泥在结构和处理效果上均能长时间保持稳定，其中以乙酸钠和葡萄糖为碳源培养出的颗粒污泥具有较密实的内部结构和较好的沉降性能；在进水COD为600mg／L、TP为15mg／L时，以葡萄糖、乙酸钠、乙醇为碳源培养出的好氧颗粒污泥对TP的去除率分别为82％、88％、52％，其中对TP去除效果较好的两种好氧颗粒污泥（以乙酸钠、葡萄糖为碳源培养的）在反应初期均有较明显的释磷现象发生；以乙酸钠为碳源培养出的颗粒污泥在进水COD浓度为800mg／L时对TP的去除率达到最高（为92％）．进一步加大COD负荷会使好氧颗粒污泥的除磷能力迅速下降。

Influence of Carbon Source on Physical Characteristics and Phosphorus Removal Performance of Aerobic Granular Sludge

Taking glucose,sodium acetate and ethanol as carbon source,the aerobic granular sludge was cultivated in internal circulation sequencing batch airlift reactors(IC-SBARs).The physical characteristics,phosphorus removal performance and phosphorus removal mechanism of three granular sludges were investigated.The results show that the morphology and treatment efficiency of the three granular sludges can be kept stable in the long-term experiments.The granular sludges cultivated with sodium acetate and glucose have denser structure and better settleability.With the influent of 600 mg/L COD and 15 mg/L TP,the phosphorus removal efficiencies of the three granular sludges are 82%,88% and 52%,respectively.The granular sludges cultivated with sodium acetate and glucose have excellent phosphorus releasing.As COD increases to 800 mg/L,the phosphorus removal efficiency by the granular sludge cultivated with sodium acetate reaches 92%,however, too high COD concentration will result in a significant decrease of phosphorus removal efficiency.