硝酸盐浓度对反硝化聚磷菌诱导的影响

通过控制缺氧段硝酸盐浓度,研究了反硝化聚磷菌的诱导方法及效果.批式试验表明,碳源浓度一定时,缺氧段硝酸盐消耗量与聚磷量呈线性关系,且与厌氧释磷量之比等于该线性关系式的斜率.在反硝化聚磷菌诱导过程中,按此比例调整缺氧段的硝酸盐浓度可很快达到良好的脱氮除磷效果,反硝化聚磷率＞95%,反硝化脱氮率＞96%.由同等条件下的缺氧与好氧最大聚磷速率可推知,诱导前反硝化聚磷菌占总聚磷菌的27.61%,诱导后则高达78.61%.

Study on Inducement Effect of Nitrate on Denitrifying Phosphate Accumulating Organisms

By controlling the nitrate concentration in the anoxic stage,the methods and effects of inducing Denitrifying Phosphate Accumulating Organisms(DNPAOs) were studied.The results of the batch experiments prove that with the same carbon source,a linear relationship between the quantity of phosphorus uptaken and the consumption of nitrate is shown under anoxic condition,and the line slope is equal to the ratio between phosphorus release quantity and nitrate consumption.During inducing the DNPAOs,adjusting nitrate concentration based on this ratio can rapidly reach an excellent effect of nitrogen and phosphorus removal: the removal efficiencies of phosphorus and nitrogen are above 95% and 96%,respectively.By calculating the maximum anoxic or aerobic phosphorus uptake rate under the same conditions,the percent of DNPAOs after cultivation increases from 27.61% to 78.61%.