A quick start-up method for short-cut nitrification and denitrification in wastewater treatment system

Abstract

The invention discloses a quick starting method of short-cut nitrification and denitrification of a wastewater treatment system. The method includes the following steps: (1) inoculating aerobic active sludge into a reactor and adding a growth accelerator A; (2) starting the system firstly in an intermittent water feeding manner and then in a continuous water feeding manner; (3) during intermittent operation, when concentration of suspensions in discharged water is lower than 100 mg / L, stopping addition of the growth accelerator A and adding denitrifying bacterial agent and a growth accelerator B; (4) when the ammonia nitrogen in inlet water reaches 400-700 mg / L and removal rate reaches more than 60% within 12 h, changing the operation into continuous water feeding, and adding the denitrifying bacterial agent and the growth accelerator B; and (5) when removal rate of total nitrogen reaches more than 70%, increasing the concentration of ammonia nitrogen until the ammonia nitrogen in inlet water reaches 500-1000 mg / L and the removal rate of total nitrogen reaches more than 80%, and at this time, completing the starting process. The method greatly reduces starting difficulty of short-cut nitrification and significantly reduces operation time, and ensures long-time stable operation of the reactor. The method has high treatment efficiency on wastewater, and can achieve simultaneous removal of ammonia nitrogen, total nitrogen and COD.

Description

technical field [0001] The invention belongs to the technical field of waste water treatment, and in particular relates to a quick start-up method for short-range nitrification and denitrification of a waste water treatment system. The method can realize quick start-up of the waste water treatment system and at the same time make the waste water meet the standard treatment. Background technique [0002] As an important research direction of water pollution control, biological denitrification of wastewater has undergone a process from mature traditional biological denitrification to new biological denitrification. The new biological denitrification process provides a feasible way for the treatment of low COD (chemical oxygen demand, an indicator of carbon source content, measured by Cr method) and high ammonia nitrogen wastewater. In particular, nitrosation biological denitrification technology has attracted widespread attention due to its advantages of reducing energy consum...

AI Technical Summary

Problems solved by technology

This greatly limits the development and application of short-cut nitrification and denitrification technology.

CN201210130659.X discloses a quick start-up method for short-range nitrification and denitrification of ammonia-containing wastewater, which is characterized by enriched nitrifying bacteria and denitrifying bacteria with nitrous nitrogen as the nitrogen source, although the method realizes Quick start of short-cut nitrification, but because of the use of nitrifying bacteria and denitrifying bacteria, the two types of bacteria need to be cultured in different culture solutions before adding, and the cultivation process is complicated

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