利用悬浮填料附着生物膜同步去除碳氮磷

采用移动床生物膜反应器（MBBR）处理配制模拟废水，实验结果表明，水力停留时间为6h、悬浮填料填充率为40％时，在不同C／N／P比率条件下，MBBR对COD、NH4＋-N和TN去除性能好且稳定，平均去除率分别达到90％、94．8％和62．39％以上，而TP的去除率受C／N／P值影响较大，当C／N／P的比值为100／10／1．8时，平均去除率达到58．03％。一定的溶解氧（DO）质量浓度能保证反应器中COD、NH4-N高效稳定的去除，同时是TN和TP同时去除的重要影响因素，在MBBR中最佳DO值约为3mg／L。由于附着在悬浮填料生物膜内部存在厌氧、缺氧微环境条件，在反应器中存在少量的反硝化聚磷菌。

Simultaneous carbon nitrogen and phosphorus removal by adherent biofilm on suspension packing

Simulated wastewater was treated by a moving bed biofilm reactor (MBBR). The results show that when the HRT is 6 h and suspension packing filling rate is 40%, the MBBR performed well on treating COD, NH₄⁺-N and TN with average removal efficiencies of more than 90%, 94.8% and 62.39%, respectively. But the removal rate of TP was significant influenced by C/N/P ratio, the average removal rate of TP reached to 58.03% at influent C/N/P ratio of 100/10/1.8. The mass concentration of dissolved oxygen(DO) with optimal value at about 3 mg/L, can ensure effective removal of COD, NH₄⁺-N and is an important factor affecting the removal of TN and TP at the same time. There was a small amount of denitrifying phosphorus removal bacteria in the reactor which resulted from the anaerobic/anoxic microenvironment existed in the inner of the suspension packing biofilm.