An aerobic denitrifying bacteria zj-17 and its application

Abstract

The invention discloses an aerobic denitrifying bacterium ZJ-17 and its application. The aerobic denitrifying bacterium belongs to Aeromonas hydrophila, named ZJ-17, and is preserved in the China Microbiological Culture Preservation Management Committee General Microbiology Center, the deposit date is May 27, 2017, numbered CGMCC No.14206, the sequence of its 16S rDNA is shown in the sequence listing. Bacteria ZJ-17 is a non-fermenting gram-negative bacterium, obligate aerobic bacteria, the growth temperature range is 25-42°C, the optimum temperature is 25-30°C, it does not grow at 4°C but can grow at 42°C. The bacteria are 1.5-5.0 μm long and 0.5-1 μm wide, club-shaped or linear, arranged in pairs or short chains, with a single flagella at one end of the bacteria and no spores. The bacterial strain of the present invention can use a variety of organic matters as carbon sources. After the bacterial strain ZJ-17 is activated and cultivated, it has excellent denitrification performance, and can be used in sewage biological denitrification process, and the removal rate of nitrate nitrogen is as high as 100%.

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...

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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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