| A new kind of ammonia-oxidizing bacteria(AOB)-Comamonas aquatic LNL3was screened out and immobilized by Poly(HEA)-Poly(HEMA) copolymer carrier using irradiation techniques. Four kinds of impact factors on short-cut nitrification, including temperature, pH, DO and free ammonia (FA) concentration had been investigated. The result showed that AOB-Comamonas aquatic LNL3had short-cut nitrification capability and the optimal temperature, pH, DO and FA concentration were 30℃, 8.5, 4.03 mg/Ｌ and 9 mg/Ｌ respectively. Corresponding to above results, ammonia nitrogen removal rate and short-cut nitrification efficiency were 93.52%, 94.73%；79.74%, 94.67%；91.17%, 94.66% and 90%, 94.4% respectively. |
