The experiment results showed that at the beginning of operation ,nitrite accumulation occurred due to adaptation to environment and growth lag of nitrobacteria .

• 试验结果表明:在系统运行初期,由于硝酸菌对环境的适应性和生长的滞后性,暂时出现亚硝酸积累,但伴随硝酸菌适应与繁殖,亚硝酸被完全氧化。