ANAEROBIC-AO-SACR COMBINED TYPE ADVANCED NITROGEN REMOVAL SYSTEM AND PROCESS FOR HIGH-AMMONIA-NITROGEN SEWAGE

摘要

The present invention provides an anaerobic-AO-SACR combined type advanced nitrogen removal system and process for high-ammonia-nitrogen sewage. The high-ammonia-nitrogen sewage firstly enters an anaerobic reactor for removal of most organic matters in the sewage; the effluent from the anaerobic reactor enters an AO reactor for pre-denitrification nitrogen removal in an anoxic zone and residual organic matter removal and ammonia nitrogen nitrification in an aerobic zone; the effluent from the AO reactor enters an intermediate water tank, and by means of control of a water quality testing device and a PLC controller, part of raw water is introduced into the intermediate water tank for adjustment of the carbon-nitrogen ratio of the sewage; then, the effluent from the intermediate water tank enters an SACR reactor, and by means of the characteristics of denitrifying bacteria as well as regulation and control of a PH/DO/ORP tester and the PLC controller on the SACR reactor, the sewage is accurately subjected to pre-denitrification-nitrification-endogenous denitrification for deep denitrification. No additional carbon source is needed, and process costs are low. Moreover, for built sewage treatment facilities using an AO process, the process in the technical solution can be implemented only by adding the intermediate water tank and the SACR reactor, and upgrading and reconstruction costs are low.