硫酸盐对AO污水处理系统COD和氨氮降解的影响

The Effect of Sulfate on COD and Ammonia Nitrogen Degradation in AO Sewage Treatment System

中国沈阳某生活污水处理厂由于地处化工园区,汇水管网内阶段性出现高浓度硫酸盐混入情况,导致该污水处理厂出水COD和氨氮指标大幅上升。经过对进水指标和出水指标的数据信息收集,废水中含大量的硫酸盐,在AO系统的厌氧段中被硫酸盐还原菌将还原为硫化物,对系统微生物产生了不利影响。浓度较低的硫酸盐对厌氧段的处理效果有促进作用,但高浓度的硫酸盐会对好氧段造成不利影响。

Because a domestic sewage treatment plant in Shenyang,China is located in a chemical industrial park,periodic mixing of high concentration of sulfate occurs in the catchment pipe network,leading to a significant increase in COD and AMMONIA nitrogen indexes in the effluent of the sewage treatment plant.After collecting the data information of the influent index and the effluent index,the sewage contains a large amount of sulfate,which is reduced to sulfide by the sulfate reducing bacteria in the anaerobic section of the AO system,which has an adverse effect on the system microorganisms.The lower concentration of sulfate can promote the treatment effect of the anaerobic section,but the high concentration of sulfate will adversely affect the aerobic section.