Composition for improving resistance of denitrification nitrogen removal system and denitrification method thereof

Abstract

The invention relates to a composition for improving resistance of a denitrification nitrogen removal system. The composition mainly comprises cordycepin, an alkyl glycoside and polyethylene glycol, the weight ratio of cordycepin to alkyl glycoside to polyethylene glycol is 1-10: 1-5: 1, preferably 1-5: 1-2: 1. The invention further provides a denitrification method of cyanide-containing and nitrogen-containing wastewater, and a biological denitrification system for treating the cyanide-containing and nitrogen-containing wastewater is contacted with the composition. When the composition disclosed by the invention is used for nitrogen removal treatment of cyanide-containing and nitrogen-containing wastewater, the rapid adaptive capacity of denitrification microorganisms to the environment and the resistance of the denitrification microorganisms to adverse environments can be improved, the denitrification activity of the microorganisms in a nitrogen removal system is effectively protected, and the stable operation of a denitrification nitrogen removal process is promoted.

Description

technical field [0001] The invention belongs to the field of sewage treatment, and in particular relates to a composition for improving the resistance of a denitrification and denitrification system and a denitrification method thereof. Background technique [0002] With the stringent environmental protection standards and the strengthening of environmental governance, the "Petroleum Refining Industry Pollutant Discharge Standard" (GB31570-2015) and the "Petrochemical Industry Pollutant Discharge Standard" (GB31571-2015) have stipulated more stringent overall Nitrogen emission standards. Therefore, the nitrate nitrogen in petrochemical and coal chemical wastewater must be treated up to the standard. Pre-denitrification or post-denitrification are commonly used treatment processes. The microorganisms involved in denitrification are mainly denitrifying bacteria, which can induce nitrate reductase A and nitrite reductase required for denitrification only under anaerobic condi...

AI Technical Summary

Problems solved by technology

However, when these accelerators are used in the treatment of wastewater containing toxic substances such as cyanide, they have poor tolerance and unsatisfactory denitrification effect

[0006] With the increasing environmental protection standards, coupled with the complexity of sewage water quality and the limitation of environmental capacity, it is more difficult to meet the standard treatment of ammonia nitrogen and total nitrogen, and the denitrification system often fluctuates

Images