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Insights into functional microbial succession during nitrogen transformation in an ectopic fermentation system
Xiaotong Yang1, Zhen Song2, Sihan Zhou1
1College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China.
Bioresource Technology
|April 6, 2019
Summary
This study investigated functional bacteria in an ectopic fermentation system (EFS) for farm wastewater treatment. Results show key bacterial groups shift with environmental changes, impacting ammonia removal and nitrogen conservation in EFS.
Area of Science:
- Environmental microbiology
- Wastewater treatment technologies
- Biogeochemical cycles
Background:
- Ectopic fermentation system (EFS) is an advanced technology for treating farm wastewater.
- EFS aims to reduce ammonia nitrogen emission and nitrogen loss.
- Understanding microbial dynamics is crucial for optimizing EFS performance.
Purpose of the Study:
- To observe functional bacteria succession related to nitrogen metabolism in EFS.
- To evaluate the associations between these bacteria and environmental factors.
- To elucidate the role of functional bacteria in ammonia removal and nitrogen conservation within EFS.
Main Methods:
- High-throughput sequencing was employed to analyze bacterial communities.
- Environmental factors including temperature, pH, moisture, and nitrogen content were monitored.
- Correlation analyses were performed to link bacterial populations with environmental parameters.
Main Results:
- Species richness and diversity of ammonia oxidizing bacteria (AOB) carrying amoA increased during fermentation.
- Diversity of denitrifying bacteria carrying nirK and nosZ decreased.
- Dominant AOB and denitrifying bacterial populations shifted significantly, showing varied correlations with environmental factors.
Conclusions:
- Functional bacteria play a critical role in ammonia removal and nitrogen conservation in EFS.
- Environmental factors significantly influence the succession of key microbial groups.
- Findings provide a theoretical basis for improving microbial agents and EFS applications.
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