Aerobic denitrification bacterium ZJ-17 and application thereof

Abstract

The invention discloses an aerobic denitrification bacterium ZJ-17 and application thereof. An aerobic denitrifying bacterium belongs to aeromonas hydrophila, is named as ZJ-17, is preserved in Chinese common microorganism culture preservation management center on May 27th, 2017 with the number being CGMCC NO.14206, and a sequence of 16S rDNA is as shown in a sequence table. The ZJ-17 bacterium isa non-fermenting Gram-negative bacterium and an obligate aerobe, has the growth temperature rage being 25 to 42 DEG C and the optimum temperature being 25 to 30 DEG C, cannot grow at 4 DEG C and cangrow at 42 DEG C. The bacterium body has the length being 1.5 to 5.0 mu m and the width being 0.5 to 1 mu m, is in a spherical rod shape or a linear shape, is arrayed in pair or a short chain shape, is uniflagellate on one end and has no endospores. The bacterial strain provided by the invention adopts multiple organic matters as a carbon source, the bacterial strain ZJ-17 is activated and cultured so as to have an excellent denitrification performance, and the nitrate nitrogen removal rate reaches up to 100 percent after the bacterium is applied to a sewage biological denitrification process.

Description

technical field [0001] The invention belongs to the technical fields of biological engineering and environmental engineering, relates to an aerobic denitrification bacterial strain, and simultaneously provides the denitrification performance of the bacterial strain. Background technique [0002] At present, with the rapid development of the national economy and the continuous deepening of the urbanization process, the total discharge of urban domestic and industrial wastewater is also increasing year by year. The widespread use of pesticides, chemical fertilizers and synthetic detergents has increased the concentration of nutrients in water bodies, and nitrogen is one of the main causes of eutrophication in water bodies. Conventional biochemical treatment process can effectively reduce BOD and SS in sewage, but when there are nutrients such as N and P in sewage, it can only remove 30-40% of nitrogen in sewage, and a large amount of nitrogen-containing sewage will directly D...

AI Technical Summary

Problems solved by technology

[0004] So far, aerobic denitrifying strains have mainly focused on Pseudomonas Bacteria and Bacillus The genus of bacteria is relatively single, and the research is mostly focused on the degradation gene and degradation mechanism, and the practical application research is limited

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