A^2/O与SCBP复合工艺除磷中试研究(英文)

Pilot Scale Research on Combined A^2/O and Suspended Carrier Biofilm Process for Phosphorus Removal

研究了A2/O与悬浮填料生物膜(SCBP)中试复合工艺的除磷效率,并考察了影响因子COD/TP与DO对除磷的影响。结果表明:总磷平均去除率为82%,达到GB/T18921-2002景观用水水质要求。当硝酸盐含量急剧下降至0.20mg/L以下时,反硝化除磷菌不再以硝酸盐作为电子受体进行聚磷活动,厌氧磷释放的最佳碳磷比为60。添加纳米改性的悬浮填料后,好氧池的溶解氧为2.0mg/L时,出水TP为0.3～0.35mg/L。

Combined process of A^2/O and suspended carrier biofilm process （SCBP） in pilot scale was used to enhance phosphorus removal. Effects of COD/TP ratio and dissolved oxygen （DO） on phosphorus removal were investigated. The results indicate that the average TP removal rate is 82% during the 180 d operation, which meet the requirement of GB/T18921-2002. Nitrate is no more used as an electron acceptor by denitrifying phosphorus removal bacteria （ DPB ） when NO3 -N concentration decreases to lower than 0. 20 mg/L in this test. The optimal COD/TP ratio is 60 for this test. Due to the addition of modified suspended carrier by nanotechnology, effluent TP concentration reaches 0.3 - 0. 35 mg/L when the DO concentration in aerobic tank is 2. 0 mg/L.