污泥龄和溶解氧对改良型Bardenpho-MBR工艺脱氮除磷效果的影响

EFFECTS OF SLUDGE RENTENTION TIME AND DISSOLVED OXYGEN ON NITROGEN AND PHOSPHORUS REMOVAL BY MODIFIED BARDENPHO-MBR PROCESS

污泥龄(SRT)和溶解氧(DO)是改良型Bardenpho-MBR工艺生物脱氮除磷重要的工艺参数,研究了实际运行中SRT和DO对改良型Bardenpho-MBR工艺的污水处理厂脱氮除磷影响。结果表明:在研究的SRT范围中,系统对COD_(Cr)和NH_(3)-N去除效果没有明显变化,TP和TN去除率随着SRT的增加而增加,降低而降低。生化池好氧末DO从1~4 mg/L降低至1~2 mg/L,COD_(Cr)和氨氮去除效果没有明显变化,TN去除率随着DO降低而增加,TP去除率呈先减小再增加趋势。整体来说,改良型Bardenpho-MBR工艺对脱氮除磷维持在较为稳定的处理效果。

Sludge rentention time(SRT)and dissolved oxygen(DO)are important process parameters for biological nitrogen and phosphorus removal in modified Bardenpho-MBR process.the effects of SRT and DO on nitrogen and phosphorus removal in the wastewater treatment plant of the modified Bardenpho-MBR process in actual operation were studied.The results showed that the removal efficiency of COD_(Cr)and ammonia nitrogen by the system did not change significantly,the removal rate of TP and TN increased with the increase of SRT,and decreased with the decrease of SRT in the range of SRT studied.At the aerobic end of the biochemical pool,DO decreased from 1~4 mg/L to 1~2 mg/L,and the system had no significant change in the removal efficiency of COD_(Cr)and ammonia nitrogen.The removal rate of TN increased with the decrease of DO,and the removal rate of TP first decreased and then increased.Overall,the modified Bardenpho-MBR process maintains a more stable treatment effect on nitrogen and phosphorus removal.