Device and method for rapidly culturing short-range denitrification bacteria and producing NO2- from fermented sludge as carbon source

Abstract

The invention discloses a device and method for rapidly culturing short-range denitrification bacteria and producing NO2- from fermented sludge as a carbon source and belongs to the field of biological sewage treatment. The device comprises a sludge storage tank, a nitration liquid raw water tank, a sludge fermentation coupled short-range denitrification sequence batch reactor and a water outlet tank. After being uniformly mixed, remaining sludge is fed into the sludge fermentation coupled short-range denitrification sequence batch reactor, hydrolysis and acidification of the sludge are completed, and a nitration liquid is fed into the reactor, and generation of NO2- is achieved. In the sludge fermentation coupled short-range denitrification sequence batch reactor, fermentation is firstlyimplemented with sludge fermentation microorganisms, and the remaining sludge can be then converted into organic matters easy to degrade, so that sludge reduction is achieved, and a carbon source is provided for short-range denitrification; and after sludge fermentation is completed, short-range denitrification is achieved with fermentation products as the carbon source. By adopting the method, sludge fermentation and short-range denitrification are combined together and are applied to wastewater biological treatment, and on the basis of land area conservation, carbon source conservation and realization of sludge reduction, harmlessness and resource recovery, NO2 accumulation can be achieved.

Description

technical field [0001] The invention relates to rapid cultivation of short-range denitrifying bacteria and production of NO using fermented sludge as a carbon source 2 - The device and method belong to the technical field of sewage biological treatment, and are used to realize the reduction, harmlessness and resource utilization of excess sludge while realizing NO 2 - Accumulated experimental devices and methods. Background technique [0002] With the rapid development of industry, environmental problems have become more and more prominent, nitrogen pollution in water bodies has become more and more serious, and eutrophication has occurred frequently, which has aroused people's great attention. How to make the method of removing nitrogenous compounds in water with high efficiency and economy has become a hot issue for scholars. Among them, the anaerobic ammonium oxidation process is favored by most scholars because of its high efficiency, economy and good energy-saving e...

AI Technical Summary

Problems solved by technology

[0004] The enrichment of short-range denitrifying bacteria is relatively difficult, and the selectivity to carbon sources is strong, and easy-to-degrade organic matter can be used, but difficult-to-degrade organic matter cannot be used.

Images