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Updated: Dec 27, 2025
07:59
Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors
Published on: December 6, 2018
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Elucidating salinity adaptation and shock loading on denitrification performance: Focusing on microbial community
Zengshuai Zhang1, Yiding Guo1, Liang Guo2
1College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
Bioresource Technology
|March 2, 2020
Summary
High salinity minimally impacts nitrate removal efficiency with acetate but slightly reduces it with fermentation liquid. Microbial communities adapt, showing salinity tolerance in specific genera.
Area of Science:
- Environmental microbiology
- Wastewater treatment
- Salinity adaptation
Background:
- Increasing salinity poses challenges for biological wastewater treatment processes.
- Understanding microbial community shifts is crucial for maintaining denitrification efficiency.
Purpose of the Study:
- To investigate denitrification efficiency and microbial community dynamics under increasing salinity.
- To evaluate performance during salinity adaptation and shock loading.
Main Methods:
- Monitoring nitrate, nitrite, and COD removal efficiencies.
- Utilizing acetate and primary sludge fermentation liquid as carbon sources.
- Analyzing microbial community structure shifts.
Main Results:
- Nitrate removal remained high (>99.0%) with acetate, but decreased to ~97% with fermentation liquid at high salinity.
- Salinity adaptation and shock loading caused minor decreases in denitrification efficiency.
- Specific genera (Azoarcus, Paracoccus) exhibited high salinity tolerance, and microbial diversity increased with fermentation liquid.
Conclusions:
- Denitrification is resilient to salinity changes, especially with acetate.
- Microbial communities demonstrate adaptive strategies to high salinity conditions.
- Fermentation liquid supports a more diverse microbial community under saline stress.
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