Starting method of CANON granule sludge of regeneration urban sewage

Abstract

The invention relates to a starting method of CANON granule sludge of regeneration urban sewage and belongs to the field of water environmental return and regeneration and the field of sewage treatment plant autotrophic nitrogen removal. The starting method comprises the following steps: firstly inoculating CANON biological filter column to back wash the sludge, diluting the urban sewage by running water, and ensuring stable operation of CANON process under high ammonia nitrogen conditions; then reducing substrate concentration and continuously improving section rising gas velocity, and adjusting the reaction time to ensure a certain ammonia oxygenation rate and total nitrogen removal rate to realize flocculent sludge granulation; finally changing inlet water to the urban sewage to enhance the processing performance. By utilizing the starting method, starting of the CANON granule sludge of the regeneration urban sewage is successfully realized in an intermittent flow manner.

Description

technical field [0001] The invention belongs to the field of water environment restoration and regeneration, and the field of autotrophic denitrification of sewage treatment plants. Specifically, it relates to a start-up method of CANON granular sludge for treating urban domestic sewage with normal temperature and low ammonia nitrogen. Background technique [0002] The problem of water resources is an important factor restricting social development. my country is rich in total water resources, but per capita freshwater resources are only 28% of the world average. Due to the increasing unreasonable discharge of industrial and agricultural sewage, the quality of limited water resources has deteriorated. At the same time, the phenomenon of water resources waste has become increasingly serious, making the originally insufficient freshwater resources more and more precious. In sewage, nitrogen pollution is one of the important factors of water pollution. There are nitrogen poll...

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Problems solved by technology

In the existing granular sludge research, the continuous operation has achieved certain research results, while the intermittent operation has the problems of long particle formation time, low total nitrogen removal rate, uneven mixing, and difficulty in increasing the total nitrogen removal load.

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