Aiming at the problem of excessive nitrogen ammonia concentration at the draining outlet along the river,a highly efficient treatment method of sodium hypochlorite as oxidant has been proposed,the polluted water with ammonia nitrogen mass concentration of 7.5 to 13.0 mg/L selected,the influence of sodium hypochlorite dosage and reaction time on the final effluent ammonia nitrogen investigated,and the optimal dosage of sodium hypochlorite ascertained.In addition,aiming at the problem of residual chlorine,hydrogen peroxide is used for its removal,and its optimal dosage investigated.Through actua...