Related Experiment Video
Updated: Jun 18, 2026
08:13
A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
Published on: December 25, 2015
[Immobilized ammonia-oxidizing bacteria Comamonas aquatic LNL3 and its partial nitrification characterization]
Zheng-kui Li1, Lu-na Shi, Zhu-you Yang
1State Key Laboratory of Pollutant Control and Resources Reuse, School of Environment, Nanjing University, Nanjing 210093, China. zhkuili@nju.edu.cn
Huan Jing Ke Xue= Huanjing Kexue
|December 9, 2009
Summary
Researchers identified Comamonas aquatic LNL3, a novel ammonia-oxidizing bacteria (AOB), for enhanced short-cut nitrification. Optimal conditions were determined for efficient ammonia nitrogen removal and nitrification processes.
Area of Science:
- Microbiology
- Environmental Science
- Biotechnology
Context:
- Ammonia-oxidizing bacteria (AOB) play a crucial role in the nitrogen cycle.
- Efficient nitrification is vital for wastewater treatment and environmental remediation.
- Short-cut nitrification offers a more efficient alternative to conventional nitrification processes.
Purpose:
- To screen and immobilize a novel AOB strain, Comamonas aquatic LNL3.
- To investigate the impact of key environmental factors on short-cut nitrification.
- To determine the optimal conditions for Comamonas aquatic LNL3-mediated short-cut nitrification.
Summary:
- A new ammonia-oxidizing bacteria (AOB) strain, Comamonas aquatic LNL3, was successfully screened and immobilized using a Poly (HEA)-Poly (HEMA) copolymer carrier via irradiation techniques.
- The study investigated the effects of temperature, pH, dissolved oxygen (DO), and free ammonia (FA) concentration on short-cut nitrification.
- Optimal conditions for Comamonas aquatic LNL3 short-cut nitrification were identified as 30°C, pH 8.5, 4.03 mg/L DO, and 9 mg/L FA concentration.
Impact:
- Comamonas aquatic LNL3 demonstrated significant short-cut nitrification capability.
- Achieved high ammonia nitrogen removal rates (up to 93.52%) and short-cut nitrification efficiencies (up to 94.73%) under optimal conditions.
- This research provides a promising microbial solution for enhanced nitrogen removal in wastewater treatment.
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