为研究黄连对生物絮凝系统氨氮处理效率的影响，添加0 g/L、2 g/L、4 g/L和6 g/L的黄连，分别为对照组C和处理组T1、T2、T3，进行氨氮、亚硝酸盐转化试验，并测定各组生物絮团硝化酶、脱氢酶活性。处理组总氨氮去除速率均高于对照组(0.38±0.07 mg/g·h)，其中T2组最高(1.49±0.08 mg/g·h)；亚硝酸盐去除速率T1组(1.38±0.10 mg/g·h)和T2组(2.05±0.14mg/g·h)高于对照组(0.75±0.06 mg/g·h)，T3组(0.17±0.05 mg/g·h)最低。试验后处理组总悬浮固体颗粒物均低于对照组(504.00±27.71 mg/L)，T3组(363.33±40.41 mg/L)最低。研究表明，添加黄连能提高生物絮团氨氮转化速率，减少总悬浮固体颗粒物的积累。

In order to study the effect of Rhizoma coptidis (R. coptidis) on ammonia nitrogen treatment efficiency of BFT system, 0 g/L, 2 g/L, 4 g/L and 6 g/L R. coptidis were added, which were named as C, T1, T2 and T3, respectively. The ammonia nitrogen and nitrite conversion tests were performed, and the nitrilase and dehydrogenase activities of each group were determined. The removal rate of total ammonia nitrogen in treatment group was higher than that in control group (0.38±0.07 mg/g·h), and the highest was in T2 group (1.49±0.08 mg/g·h). The nitrite removal rate of T1 group (1.38±0.10 mg/g·h) and T2 group (2.05±0.14mg/g·h) was higher than that of C group (0.75±0.06 mg/g·h), and T3 group (0.17±0.05 mg/g·h) was the lowest. After the test, the total suspended solid in treatment group was lower than that in control group (504.00±27.71a mg/L), and the lowest in T3 group (363.33±40.41mg/L). The experimental results showed that R. coptidis could improve the ammonia nitrogen conversion rate of biofloc and reduce the accumulation of total suspended solid.