THE SCREENING OF LOW-TEMPERATURE NITRIFYING BACTERIA STAINS AND THEIR IMMOBILIZATION AND DENITRIFICATION PERFORMANCE

LI Si-qi; LI Zhen-yang; LIU Lin; JIANG Run; WANG Xiao-hui

doi:10.13205/j.hjgc.202112008

Volume 39 Issue 12

Mar. 2022

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LI Si-qi, LI Zhen-yang, LIU Lin, JIANG Run, WANG Xiao-hui. THE SCREENING OF LOW-TEMPERATURE NITRIFYING BACTERIA STAINS AND THEIR IMMOBILIZATION AND DENITRIFICATION PERFORMANCE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 51-58,78. doi: 10.13205/j.hjgc.202112008

Citation:

LI Si-qi, LI Zhen-yang, LIU Lin, JIANG Run, WANG Xiao-hui. THE SCREENING OF LOW-TEMPERATURE NITRIFYING BACTERIA STAINS AND THEIR IMMOBILIZATION AND DENITRIFICATION PERFORMANCE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 51-58,78. doi: 10.13205/j.hjgc.202112008

Citation:

LI Si-qi, LI Zhen-yang, LIU Lin, JIANG Run, WANG Xiao-hui. THE SCREENING OF LOW-TEMPERATURE NITRIFYING BACTERIA STAINS AND THEIR IMMOBILIZATION AND DENITRIFICATION PERFORMANCE[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(12): 51-58,78. doi: 10.13205/j.hjgc.202112008

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THE SCREENING OF LOW-TEMPERATURE NITRIFYING BACTERIA STAINS AND THEIR IMMOBILIZATION AND DENITRIFICATION PERFORMANCE

doi: 10.13205/j.hjgc.202112008

1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China;
2. The Administrative Committee of Airport New City in Xixian New Area, Xi’an 712034, China

Received Date: 2020-10-03
Available Online: 2022-03-30
Publish Date: 2022-03-30

Abstract

Abstract

Low-temperature environment is usually inevitable for the sewage biological treatment system, which seriously affects the microbial activity. How to improve the denitrification effect of microorganisms in low-temperature is an urgent problem. In this study, low-temperature nitrifying bacteria BC-15, SL-14 and MI-11, extracted from three different environments all had high nitrogen removal efficiency at 13 ℃, and all of them were identified as Acinetobacter sp. by 16S rDNA. There was no antagonistic reaction among the strains, and the best compound ratio was 1∶1∶1. Compared with sodium alginate-polyvinyl alcohol and sodium alginate-diatomite materials, the results showed that sodium alginate-diatomite materials had stronger immobilization and nitrification ability, and the best ratio of immobilization materials was 1% diatomite, 2% SA, 3% CaCl₂ and 6% zeolite. The spheroidization, mass transfer and stability of the immobilized particles were all reliable. After immobilization, the acid and alkali tolerance of the strain was significantly enhanced, and the removal rate of ammonia nitrogen still reached 76.67% after 4 times of reuse, and the nitrification ability and structure were stable. The removal rate of ammonia nitrogen in real domestic sewage by immobilized particles reached 95.86%, showed high nitrification ability, and could raise the possibility for the practical engineering application of low temperature sewage treatment.
- low temperature nitrification,
- Acinetobacter sp.,
- immobilization,
- sodium alginate

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References(34)

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