作　　者： ; ; ;

机构地区： 华南理工大学环境科学与工程学院

出　　处： 《净水技术》 2007年第1期42-46,共5页

摘　　要： 为进一步了解反硝化除磷菌,以SBR反应器在厌氧/好氧条件下培养的聚磷菌为对象,进行批次试验,研究了不同浓度NO_(2-)^--N对缺氧吸磷过程的影响。结果证实:NO_(2-)^--N可以作为缺氧吸磷的电子受体,但吸磷速率比好氧吸磷低,吸磷量比好氧吸磷少。反应开始时的NO_(2-)^--N/P对反应过程影响很大,该试验中NO_(2-)^--N/P为0.60时缺氧吸磷量和吸磷速率均达到最高。低于该值时,吸磷量和吸磷速率随着氮磷比的提高而增加,NO_(2-)^--N消耗完时,体系出现"二次释磷"现象;高于该值时,吸磷量和吸磷速率随着氮磷比的提高而减少。NO_(2-)^--N浓度达到80mg/L时,没有发现对反应的抑制作用。 The effect of nitrite on anoxic phosphorus uptake was investigated in detail to obtain a better insight into the metabolic behavior of denitrifying phosphorus bacteria. Batch experimental tests under different nitrite concentrations were carried out using activated sludge cultivated in a sequencing batch reactor （SBR） under anaerobic-aerobic condition. The experimental results confirmed that nitrite could be used as electron acceptor for anoxic phosphorus uptake. However, for nitrite a relatively small amount of anoxic phosphorus was taken up compared with aerobic phosphorus uptake. The result also confirmed that the activity of anoxic phosphorus uptake was associated with the initial ratio of electron acceptor to phosphorus under anoxic conditions. There was an optimal ratio of nitrite to phosphorus at the beginning （in this experiment the ratio was 0.60）. If the initial ratio of nitrite to phosphorus were below the optimal value, the amount of anoxic phosphorus taken up increased with an increase in the initial loading amount of nitrite, otherwise it would decrease, The results of the batch experiments were also compared with aerobic phosphorus uptake. From these results, it was suggested that nitrite was not an inhibitor to phosphorus removal process even the concentt＇ation was about 80mg/L. Instead, it was an alternative electron aeeeptor to oxygen or nitrate.

关 键 词： 缺氧吸磷 电子受体 亚硝氮 反硝化除磷菌

领　　域： [环境科学与工程]