An autotrophic nitrogen removal method for sewage treatment by coupling of main stream and side stream sewage treatment

Abstract

The application provides a kind of autotrophic denitrification sewage treatment method coupled with main stream and side stream sewage treatment, comprising: I. the main stream sewage is introduced into the main stream reactor of rotating cage type fixed biofilm integrated activated sludge to carry out autotrophic denitrification treatment on main stream sewage;II. the side stream sewage treated by short-cut nitrification is introduced into the side stream reactor comprising rotating cage assembly to carry out anaerobic ammonia oxidation treatment on side stream sewage, and the rotating cage assembly is fixed with biofilm carrier;When the denitrification efficiency of the main stream reactor is reduced to a predetermined level due to the loss of AnAOB biomass or the decrease of specific activity, or when the specific activity of the side stream reactor is reduced to a predetermined level due to the excessive reproduction of AnAOB, all or part of the rotating cage assembly in process I is exchanged with all or part of the rotating cage assembly in process II. The main stream reactor and the side stream reactor of the application are composed of detachable modules, and the biofilm carrier can be switched between the main stream and the side stream simply and quickly by disassembling and assembling the modules.

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