改良A^2/O-MBBR工艺的生活污水处理试验研究

Experimental Study on Domestic Sewage Treatment by Modified A^2/O-MBBR Process

在HRT为20h,MBBR池放置悬浮填料填充量为池容的30%,好氧池的溶解氧(DO)控制为2~3m/L、MBBR池的溶解氧(DO)为1~2mg/L,硝化液回流比为150%,污泥回流比为70%的条件下,试验装置对COD、氨氮、TN、TP和SS的去除率分别为86.8%~91.9%、88.8%~94.0%、65.5%~76.7%、85.9%~91.9%和94.2~98.1%,具有良好的同步脱氮除磷效果,且抗冲击负荷性强。试验表明改良A^2/O-MBBR适用于处理生活污水,具有良好的发展前景和推广价值。

In the conditions of HRT was 20h,the filling capacity of MBBR filler was 30%,the dissolved oxygen(DO)in the aerobic pool was controlled at 2~3m/L,and the dissolved oxygen(DO)in the MBBR pool was 1~2mg/L,the internal recycle ratio was 150%,and the sludge reflux ratio was 70%,the removal rates of COD,ammonia nitrogen,TN,TP and SS were 86.8%~91.9%,88.8%~94.0%,65.5%~76.7%,85.9%~91.9%and 94.2~98.1%,respectively.It has good effect of simultaneous nitrogen and phosphorus removal,and strong load resistance.The experiment shows that the modified A^2/O-MBBR is suitable for the treatment of domestic sewage,and has a good development prospect and promotion value.