HETEROTROPHIC NITRIFICATION-AEROBIC DENITRIFICATION CHARACTERISTICS OF <i>ALCALIGENES FAECALIS</i> WT14 AND ITS POTENTIAL APPLICATION IN AMMONIA-RICH WASTEWATER

CHEN Jun-li; ZHANG Miao-miao; ZHANG Shu-nan; XIAO Run-lin; WU Jin-shui; LIU Feng

doi:10.13205/j.hjgc.202102005

Volume 39 Issue 2

Jul. 2021

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2021 > 39(2): 27-32,40

CHEN Jun-li, ZHANG Miao-miao, ZHANG Shu-nan, XIAO Run-lin, WU Jin-shui, LIU Feng. HETEROTROPHIC NITRIFICATION-AEROBIC DENITRIFICATION CHARACTERISTICS OF ALCALIGENES FAECALIS WT14 AND ITS POTENTIAL APPLICATION IN AMMONIA-RICH WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(2): 27-32,40. doi: 10.13205/j.hjgc.202102005

Citation:

CHEN Jun-li, ZHANG Miao-miao, ZHANG Shu-nan, XIAO Run-lin, WU Jin-shui, LIU Feng. HETEROTROPHIC NITRIFICATION-AEROBIC DENITRIFICATION CHARACTERISTICS OF ALCALIGENES FAECALIS WT14 AND ITS POTENTIAL APPLICATION IN AMMONIA-RICH WASTEWATER[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(2): 27-32,40. doi: 10.13205/j.hjgc.202102005

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HETEROTROPHIC NITRIFICATION-AEROBIC DENITRIFICATION CHARACTERISTICS OF ALCALIGENES FAECALIS WT14 AND ITS POTENTIAL APPLICATION IN AMMONIA-RICH WASTEWATER

doi: 10.13205/j.hjgc.202102005

1. Key Laboratory of Agro-ecological Processes in Subtropical Regions, Changsha Research Station for Agricultural and Environmental Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2020-03-10
Available Online: 2021-07-19

Abstract

Abstract

The ability of HN-AD bacteria to simultaneous nitrification and denitrification caused widespread concern in biological wastewater treatment. In order to investigate the application potential of HN-AD bacteria in ammonia-rich wastewater, the HN-AD bacteria Alcaligenes faecalis WT14 was isolated from the substrate of constructed wetland sediment. The nitrogen removal characteristics of this strain were studied under aerobic conditions, and the effect of the interaction between the removal potential of high ammonia wastewater and environmental factors on its nitrogen removal efficiency was evaluated. The strain WT14 exhibited excellent HN-AD performance and high ammonia tolerance. It could remove 98.9% of NO₃^--N and 92.7% of TOC under aerobic conditions, and no NO₂^--N accumulation took place in the whole course. At the same time, the strain WT14 treated high ammonia (2000 mg/L) wastewater with a free ammonia concentration of 1084.6 mg/L and removed about 43% NH₄⁺-N without accumulation of NO₃^--N. The results of response surface methodology showed that the optimal conditions for denitrification were as follows:20.6℃, 113.5 r/min, C/N of 10.8, and pH of 8.4. Overall, the strain WT14 has good potential for ammonia-rich wastewater treatment.
- heterotrophic nitrification-aerobic denitrification,
- simultaneous denitrification,
- Alcaligenes faecalis,
- free ammonia,
- ammonia

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References(21)

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