Method for starting up whole-course autotrophic nitrogen removal filter column

Abstract

The invention discloses a method for starting up a whole-course autotrophic nitrogen removal filter column, and belongs to the field of wastewater autotrophic nitrogen removal. The method comprises the steps: taking filter materials of a nitrosation biological filter column and an anaerobic ammonia oxidation biological filter column according to the mass ratio of 1:3 to 3:1, arranging the two filter materials successively, and starting up the autotrophic nitrogen removal filter column under oxygen limited continuous flow conditions. Firstly, the whole-course autotrophic nitrogen removal filter column is started up under a condition of low load, along with a fact that microorganisms in the filter column constantly adapt to the environment, the processing capability of the filter column is improved continually until ammonia nitrogen is removed basically. Then in a high-load culture stage, the load of inflow water ammonia nitrogen is improved by a way of keeping the inflow water substrate concentration constant and shortening the hydraulic power retention time, and the processing performance of the filter column is enhanced. Compared with a starting-up mode of a traditional autotrophic nitrogen removal filter column, the method has the advantages of quick starting-up, high total nitrogen removal load, less amount of anaerobic ammonia oxidation bacteria and the like.

Description

technical field [0001] The invention belongs to the field of sewage treatment and recycling. In particular, it relates to a method for starting a whole-process autotrophic denitrification process in a reactor in the form of a filter column. It is suitable for the treatment of sewage with high ammonia nitrogen and low carbon nitrogen ratio. Background technique [0002] Third et al. proposed the CANON (Completely Autotrophic Nitrogen removal Over Nitrite) process in 1999, that is, a single-stage full autotrophic denitrification process, which is based on short-range nitrification and anammox biological reactions. Compared with the traditional full-process nitrification and denitrification process, this process has many advantages such as short denitrification process, small footprint, less infrastructure investment; saving oxygen consumption, reducing carbon emissions; less residual sludge; no need for additional carbon sources and many other advantages. This process confor...

AI Technical Summary

Problems solved by technology

In the traditional method, it is difficult to inoculate nitrosifying flocculent sludge to completely mix nitrosifying bacteria and anammox bacteria, which is not conducive to the formation of anaerobic microenvironment for nitrosifying bacteria, and it is difficult to reduce the inhibition of dissolved oxygen on anammox bacteria

More importantly, the rate-limiting step of the autotrophic denitrification process is nitrification, and only a small amount of anammox bacteria can start the autotrophic denitrification reactor, so converting an anammox filter column into an autotrophic denitrification Nitrogen filter column is not economical and inefficient

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