Strain Pandoraea sp. for removing ammonia nitrogen in sewage under low-temperature condition and isolated culture method

Abstract

The invention discloses a strain Pandoraea sp. for removing ammonia nitrogen in sewage under a low-temperature condition and an isolated culture method. The strain Pandoraea sp.-2CGMCC No. 5284 for removing the ammonia nitrogen in the sewage under the low-temperature condition has the capacity of removing the ammonia nitrogen in the sewage under the low-temperature aerobic condition. Experimentalresults show that: although the strain is obviously inhibited by a low-temperature environment, the strain Pandoraea sp.-2CGMCC No. 5284 for removing the ammonia nitrogen in the sewage under the low-temperature condition has an obvious reinforcing effect of removing the ammonia nitrogen at the low temperature of 10 DEG C, the removal rate of the ammonia nitrogen is improved by 10 percent, and thehighest concentration of the effluent ammonia nitrogen is 5.1mg / L and superior to the effluent standard of the first grade A (when the water temperature is less than or equal to 12 DEG C, the controlindex of the first grade A standard is 8mg / L).

Description

technical field [0001] The invention belongs to the field of sewage treatment, and relates to a bacterium Pandoraea sp. for removing ammonia nitrogen in sewage under low temperature conditions and an isolation and cultivation method. Background technique [0002] The reason why low temperature has a significant impact on biological treatment capacity is that the decrease in temperature affects the growth and metabolism of microorganisms and changes the microbial flora in sewage treatment systems. In the process of temperature drop, the metabolic activity of mesophilic bacteria gradually decreases, and they lose their activity when they reach a certain temperature. However, the number of low-temperature microorganisms suitable for low-temperature environments cannot be reduced in number due to their own physiological characteristics and the inhibition of various ecological factors. Reaching the status of the dominant flora, which leads to a decline in the quality of the efflu...

AI Technical Summary

Problems solved by technology

In the process of temperature drop, the metabolic activity of mesophilic bacteria gradually decreases, and they lose their activity when they reach a certain temperature. However, the number of low-temperature microorganisms suitable for low-temperature environments cannot be reduced in number due to their own physiological characteristics and the inhibition of various ecological factors. Reaching the status of the dominant flora, resulting in a decline in the quality of effluent from sewage treatment plants in winter

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