速分球生物滤柱处理低C/N比废水脱氮除磷研究

速分球生物滤柱是速分技术与曝气生物滤池技术的结合。具有污泥消化和无需反冲洗等优点。实验采用速分球生物滤柱实验装置,以低C/N比生活污水为处理对象,考查了单污泥前置反硝化A2/O系统的脱氮除磷特性。实验结果表明,在平均C/N比为1.6,内回流比R为100%的条件下,平均进水COD、氨氮、TP分别为440.7、274.0和13.6 mg/L,平均去除率分别为77.0%、19.2%和42.4%。系统对氨氮的去除率较低,对总磷的去除率要明显高于对氨氮的去除率。结论得出,系统脱氮除磷的效果不理想。

Biological Phosphorus and Nitrogen Removal in Low C/N Ratio Domestic Sewage Treatment by Velocity Discrete Biofilter

Velocity discrete biofilter is the combination of velocity discrete theory and biological aerated filter with advantages of sludge digestion and no need to backwash.In the experiment,velocity discrete biofilter column was adopted as the experimental equipment to investigate nitrogen and phosphorus removal effect of inverse anaerobic/anoxic/oxic(A2/O)during the treatment of real domestic sewage with low C/N ratio.Experimental results showed that under the conditions of C/N ratio 1.6 and internal recycle ratio 100%,average concentrations of COD,NH3-N and total phosphorus(TP)were 440.7 mg/L,274.0 mg/L and 13.6 mg/L in influent wastewater respectively,and average removal efficiencies reached to 77.0%,19.2% and 42.4%.In the system the removal efficiency of NH3-N was not effective and lower than TP.Nitrogen and phosphorus removal efficiency was unsatisfactory by the system.