cyanide wastewater treatment stations adopted advanced A / A / O biological nitrogen removal technology which combined anaerobic with aerobic ways.It remove effectively the coking wastewater phenol
cyanide
COD and ammonia nitrogen and other pollutants.Especially ammonia content in the effluent is far below the steel industry emission standard(15mg / l).The article dwells on the A / A / O biological nitrogen removal of the principle of operation and process control.