Wastewater denitrification process and device based on synchronous nitrification and denitrification bacteria

Abstract

The invention provides a wastewater denitrification process and device based on synchronous nitrification and denitrification bacteria. The wastewater denitrification process comprises the following steps: culturing a synchronous nitrification and denitrification bacteria suspension under an aerobic condition, and preparing the synchronous nitrification and denitrification bacteria suspension and activated sludge into seed sludge; inoculating the seed mud into a reactor, starting the reactor, introducing the wastewater subjected to anaerobic treatment into the reactor, controlling the reactor to carry out aeration, and controlling the water temperature in the reactor; supplementing the synchronous nitrification and denitrification bacteria suspension into the reactor regularly, introducing water with preset salinity into the reactor regularly, and carrying out enhanced domestication of the synchronous nitrification and denitrification bacteria; and detecting the total nitrogen removal rate in the wastewater, and when the total nitrogen removal rate is lower than a preset removal rate, regulating and supplementing the synchronous nitrification and denitrification bacterial liquid. The wastewater denitrification process and device based on synchronous nitrification and denitrification bacteria provided by the invention can realize nitrification and denitrification in the same reaction container, and have an effective treatment effect on wastewater with high ammonia nitrogen and high carbon nitrogen ratio.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a wastewater denitrification process and device based on synchronous nitrification and denitrification bacteria. Background technique [0002] Wastewater containing a large amount of nitrogen and organic matter is directly discharged without treatment, which will cause serious damage to the environment, resulting in serious environmental problems, such as eutrophication of water bodies. At present, in the field of wastewater treatment technology, traditional biological methods are usually used for wastewater denitrification treatment. The traditional sewage denitrification method adopts aerobic nitrification-heterotrophic denitrification biological denitrification method. This traditional biological denitrification method mainly relies on ammonia oxidizing bacteria (AOB) and nitrite oxidizing bacteria (NOB) to oxidize ammonia nitrogen to nitrate through nitrite unde...

AI Technical Summary

Problems solved by technology

[0007]However, the nitrification and denitrification process currently in operation often carries out nitrification reaction and denitrification reaction separately by integrating mutually independent tanks or by Realize different dissolved oxygen concentration gradients to realize synchronous nitrification and denitrification, but the water treatment process relying on the macro-environmental theory has high energy consumption, complex process, low removal rate, and unsatisfactory operation effect

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