模拟黑水的生物处理

Investigation on biological treatment of semi-artificial black water

针对以糖蜜配制的半人工黑水生物处理时除磷效率下降和污泥膨胀的现象,利用序批式反应器(SBR)进行了实验分析,比较了以蔗糖和糖蜜为主要碳源时除磷效果的差异,并探讨了污泥膨胀发生的原因。研究表明,以糖蜜为主要碳源配制模拟黑水时的除磷效果比蔗糖为碳源时差,主要是由于GAOs的竞争性代谢所致。以糖蜜为碳源的条件下,污泥的胞外聚合物含量是正常活性污泥的一倍以上,导致污泥沉降性能变差;糖蜜碳源时的夏季高温条件下丝状菌大量生长也是导致污泥膨胀的重要原因。

In this paper,to investigate the declined phosphorus removal efficiency and sludge bulking phenomenon when treating the semi-artificial black water using molasses as main carbon source,sequencing batch reactors（SBR） was used to compare the differences of phosphorus removal efficiency under different carbon source conditions,molasses and sugar respectively.The causes of sludge bulking was also discussed.The results showed that,due to the competitive metabolism of GAOs（glycogen accumulating organisms）,the phosphorus removal efficiency when using molasses as the carbon source was worse than using sugar.Under the condition of molasses as the carbon source,the extracellular polymeric substances（EPS） were about twice more than the normal activated sludge,leading to the bad sludge settling ability.Filamentous microorganisms＇ predominating in the system under the summer high temperature condition was another important reason for sludge bulking when using the molasses as the carbon source.