The invention provides an autotrophic
denitrification deep
denitrification device, and belongs to the technical field of
wastewater deep
denitrification. The device comprises an adjusting tank, a reactor and a
sedimentation tank; a
sludge discharge area is arranged at the bottom end in the reactor; a water distribution
pipe is arranged above the
sludge discharge area; a filter screen is arranged between the
sludge discharge area and the water distribution
pipe; a reaction area is arranged on the water distribution
pipe; and a gas collection area is arranged above the reaction area. According to the device, an autotrophic denitrification
biological filter bed is constructed, and types and proportions of fillers in the reaction area are optimized. The invention also discloses an autotrophicdenitrification deep denitrification method. The method optimizes the
operation mode and operation condition and improves
biological activity and denitrification capacity of autotrophic denitrification
bacteria in a
system, so that the starting time is shortened, and the denitrification effect of the
system is enhanced. The autotrophic denitrification deep denitrification device has the characteristics of low
energy consumption, quick reaction, no secondary
pollution and the like, and solves the problems of long starting time, high
sulfate radical concentration of outlet water, easy blockage,easy
sulfur outflow and the like of an existing autotrophic denitrification technology in a process of treating low-carbon-source
sewage.