Heterotrophic nitrification-aerobic denitrification pseudomonas and culture method and application thereof

Abstract

The invention discloses a heterotrophic nitrification-aerobic denitrification pseudomonas. The strain is Pseudomonas sihuiensis YG5, and is preserved in the Guangdong Microbial Culture Collection Center, the preservation time is December 25, 2018, and the preservation number is GDMCC No: 60533. The strain can tolerate high concentrations of NH4<+>-N, NO3<->-N and NO3<->-N and has a high removal rate on NH4<+>-N, NO3<->-N and NO3<->-N in a high concentration range, which indicates that the strain YG5 has the potential of treating wastewater with high concentrations of NH4<+>-N, NO3<->-N and NO3<->-N.

Description

technical field [0001] The invention relates to the technical field of microorganisms, in particular to a heterotrophic nitrifying-aerobic denitrifying Pseudomonas and its cultivation method and application. Background technique [0002] With the rapid development of the economy, people's over-exploitation of the natural environment and the rapid development of industry and agriculture have caused serious pollution of natural water bodies, among which nitrogen is the main pollutant of water bodies, which mainly exist in four forms, namely organic nitrogen , ammonia nitrogen, nitrite nitrogen and nitrate nitrogen. Excessive concentration of ammonia nitrogen in the water body will lead to eutrophication of the water body; excessive concentration of nitrate nitrogen will cause human hypertension, methemoglobin and other diseases; nitrate can be converted into nitrite in the body, which can easily induce various diseases and even cause cancer. Therefore, solving the problem of ...

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Problems solved by technology

[0005] Although there are many studies on HN-AD bacteria, which play an increasingly important role in the field of sewage treatment, there are still some problems, such as the narrow range of nitrogen concentration that HN-AD bacteria adapt to, and the low nitrogen load they tolerate. , Poor denitrification performance under low C / N ratio conditions, etc.

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