除磷工艺中厌氧释磷和好氧吸磷的影响因素

通过静态试验考察除磷菌的厌氧释磷和好氧吸磷情况。在厌氧状态、低有机负荷率的条件下,污泥释磷的速率随有机负荷率的升高而增加,但当有机负荷率超过一临界数值0.12gSCOD/gMLSS后,有机负荷率不再成为释磷菌厌氧释磷的限制性因素。此外,试验考察了硝态氮的存在对厌氧释磷和后续好氧吸磷的影响,发现硝态氮的存在不利于除磷菌的厌氧释磷从而限制了在后续好氧状态下的吸磷效果。同时,考虑了溶解氧浓度对除磷菌好氧吸磷的速率影响。

On Influence Factors of Phosphorus Release and Uptake Under Aerobic and Anaerobic Conditions

Batch experiments were carried out to obtain an understanding of phosphorus release and uptake under the anaerobic condition and then the aerobic condition respectively. Under anaerobic condition, it was found that the extent of phosphorus release appeared to increase with the increase of the initial organic loading rate when the initial organic loading rate was up to 0.12g SCOD/g MLSS. When the initial organic loading rate was higher than 0.12g SCOD/g MLSS, the amount of phosphorus release per unit mass of MLSS reached nearly a same stationary value. In addition, the effect of NOx-N on the phosphorus release and uptake was also investigated, and it was found that the existence of NOx-N was disadvantageous to the phosphorus release. In addition, the influence of DO on phosphorus uptake rate was also studied.