A novel anammox process combined with vibration technology.
Kuo Zhang1, Bo Yang1, Yongguang Ma2
1Institute of Process Equipment and Environmental Engineering, School of Mechanical Engineering and Automation, Northeastern University, Shenyang 110004, PR China.
Bioresource Technology
|February 21, 2018
Summary
Vibration significantly enhances anammox bioreactor performance by reducing startup time and increasing nitrogen removal rates. This method promotes a higher abundance of beneficial anammox bacteria for improved wastewater treatment.
Area of Science:
- Environmental Science
- Biotechnology
- Wastewater Treatment
Background:
- Anammox (anaerobic ammonium oxidation) processes are crucial for nitrogen removal in wastewater treatment.
- Optimizing anammox bioreactor efficiency, particularly startup time and nitrogen removal rate (NRR), remains a key challenge.
Purpose of the Study:
- To investigate the impact of vibration techniques on the performance of a fixed-bed anammox bioreactor.
- To determine the effect of vibration on anammox bacterial community structure and activity.
Main Methods:
- A fixed-bed anammox bioreactor was operated with and without vibration applied.
- Nitrogen removal rates and activity elevation periods were monitored.
- High-throughput sequencing was used to analyze the microbial community composition.
Main Results:
- Vibration shortened the anammox activity elevation period by one-third.
- The maximum NRR reached 3.3 kg·N/m³·d under resonance vibration, 1.8 times higher than the control.
- Vibration increased the proportion of anammox bacteria by 7 times and decreased Proteobacteria and Chloroflexi.
Conclusions:
- Vibration is a key factor in significantly improving anammox bioreactor system performance.
- Vibration enhances anammox activity and promotes a favorable microbial environment for anammox bacteria.
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