基于动态负荷的碱度对硝化性能的影响研究

Effect of Alkalinity on Nitrification Based on Dynamic Loading

对某污水处理厂出水氨氮浓度不达标的原因进行了分析,指出进水碱度不足是主要原因,并分析了碱度对硝化性能的动态影响,阐述了出水氨氮与碱度、pH值之间的关系。研究发现,投加碱度可直接影响到该污水厂的硝化效果,碱度投加后出水氨氮浓度并不是立即降低,而是会有一定的滞后期,约为一周左右。当碱度投加不足时硝化效果会随之下降,但出水pH值、碱度不会过度降低。

The causes for high effluent ammonia at a wastewater treatment piauL v, ： Lack of alkalinity in the influent was found to be the main reason. The dynamic effect of alkalinity on ni- trification was analyzed, and the relationship of effluent ammonia to alkalinity and pH value was elabora- ted. The study showed that nitrification could be directly affected by adding alkalinity, the effluent am- monia concentration would not immediately decrease when adding alkalinity. It has a lag phase usually of about one week. When not enough alkalinity was added, nitrification would drop down accordingly, but effluent pH and alkalinity would not decrease too much.