利用包埋菌膨胀床工艺对碎煤加压气化废水进行深度脱氮处理。实验结果表明，包埋菌膨胀床反应器能耐受较高的总氮（TN）负荷变化，并有效去除碎煤加压气化废水的TN。缩短水力停留时间和降低包埋菌颗粒填充率都不利于反应器去除废水TN。当包埋菌颗粒填充率为20%、包埋菌膨胀床水力停留时间为6 h、反应器进水TN质量浓度为160 mg/L左右时，反应器出水TN质量浓度稳定小于3 mg/L，TN去除率达到97%以上。

The nitrogen removal treatment of coal gasification wastewater is performed by the expanded granular sludge bed (EGSB) combined with embedded bacteria process.Experimental results show that the EGSB with embedded bacteria reactor is able to withstand wider total nitrogen (TN) load change range and can effectively remove TN from coal gasification wastewater.Neither shortening the hydraulic retention time (HRT) of EGSB reactor nor reducing the filling rate of embedded bacteria granular are conducive to the TN removal from wastewater.TN concentration in effluent from EGSB with embedded bacteria reactor is less than 3 mg·L^-1 and TN removal rate can exceed 97% when the filling rate of embedded bacteria granular is 20%,HRT in the reactor is 6 h and the influent TN concentration is around 160 mg·L^-1.