Method for improving desulfurization and denitrification efficiencies of flue gas in biomembrane packing tower by using artificial compound functional bacteria simultaneously

Abstract

The invention provides a method for improving desulfurization and denitrification efficiencies of a flue gas in a biomembrane packing tower by using artificial compound functional bacteria simultaneously. In the method, a single simultaneous desulfurization and denitrification system of the flue gas in the biomembrane packing tower is used; and a bacterial strain solution of the artificial compound functional bacteria and a bacterial strain solution of original predominant bacteria in the biomembrane packing tower are added to a circulating fluid in a circulating fluid storage tank in the biomembrane packing tower system in proportion, thus a biomembrane of the biomembrane packing tower can optimize a population structure of desulfurization and denitrification functional bacteria and improve a microecosystem for the mixed bacterial strain solution entering into the biomembrane, thereby reaching the purpose of improving the desulfurization and denitrification efficiencies of the flue gas in the biomembrane packing tower. The operation that fungus, nitrifying bacteria, denitrifying bacteria and a bacterial strain solution of desulfurizing bacteria obtained in advance are compounded to the circulating fluid in the biomembrane packing tower system in an optimal proportion of 5, 45, 10 and 60mL / L is screened by an experiment, thus the effect of improving the desulfurization and denitrification efficiencies of the flue gas in the biomembrane packing tower is optimal.

Description

Technical field: [0001] The invention is a technical method for improving the simultaneous desulfurization and denitrification efficiency of flue gas in a biofilm packing tower by artificially compounding functional bacteria. The invention belongs to the technical field of biological method industrial waste gas purification. Background technique: [0002] In recent years, with many developed countries and China's SO emissions from flue gas 2 , NOx and smoke and other pollutants control environmental protection legislation is becoming increasingly stringent, to seek technologically advanced, economically reasonable flue gas simultaneous desulfurization and denitrification technology has been one of the new frontier research hotspots in the field of environmental protection. Although some flue gas desulfurization and denitrification technologies have appeared at home and abroad in recent years, most of them are still in the stage of experimental development and application ve...

AI Technical Summary

Problems solved by technology

[0005] Since the microorganisms in the biofilm packed tower used for simultaneous desulfurization and denitrification of flue gas are composed of desulfurization and denitrification autotrophic bacteria, the biofilm packed tower system generally has a strong desulfurization and denitrification at this stage. The strain type and population structure of nitrogen-dominated bacteria are relatively simple, and the micro-ecological system formed is relatively weak in resisting the influence of changes in external conditions. Conventional methods of promoting rapid growth of microorganisms are used to improve the simultaneous desulfurization of flue gas in biofilm-packed towers. Nitrogen removal efficiency is generally difficult to work

If the operating conditions of the biofilm packed tower change, the growth environment conditions of microorganisms in the system change, such as SO in the flue gas 2 and NOx concentration increase, gas phase CO 2 Changes in carbon source supply conditions and increased flue gas volume fluctuations will have an adverse effect on the simultaneous desulfurization and denitrification performance of the flue gas in the biofilm packed tower.

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