Isolation and identification of aerobic denitrifiers and dispose the wastewater of NO₃^--N

After domesticating activated sludge to enriched aerobic denitrifiers, 5 aerobic denitrifiers were isolated from it. The removal rates of TN were 90.4%, 91.2%, 94.6%, 95.6% and 97% by f1, f2, f3, f5 and f7, respectively. According to the physiological biochemical index, five strains of aerobic denitrifiers were generally identified as Pseudomonas sp., Paracoccus sp., respectively. The establishment of continuous flow reactor surveyed various indices. And the efficiency of nitrate nitrogen removal can reach up to 98.16%, when the reactor works smoothly. The nitrite concentration of effluent was at a low level and the maximum value was no more than 3.56 mg/L. At the same time, the efficiency of COD removal was 87.24%, which demonstrates the coinstantaneous removing of both organic and nitrate nitrogen.