Related Experiment Video
Updated: May 6, 2026
06:11
Author Spotlight: Advancing Anaerobic Microbiota Research Using a Novel Respirometry Protocol
Published on: April 26, 2024
2.3K
Achieving partial denitrification with sludge fermentation liquid as carbon source: the effect of seeding sludge
Shenbin Cao1, Shuying Wang, Yongzhen Peng
1Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing 100124, China.
Bioresource Technology
|October 22, 2013
Summary
Partial denitrification effectively converts nitrate to nitrite using sludge fermentation liquid. The SA-A sludge system achieved an 80% nitrate-to-nitrite transformation ratio, demonstrating stable performance for wastewater treatment.
Area of Science:
- Environmental microbiology
- Wastewater treatment technologies
Background:
- Partial denitrification is crucial for integrated nitrate removal systems.
- Sludge source significantly impacts partial denitrification efficiency.
Purpose of the Study:
- To evaluate the influence of different seeding sludges on partial denitrification.
- To optimize nitrate-to-nitrite transformation using sludge fermentation liquid as a carbon source.
Main Methods:
- Investigated partial denitrification using sludge from anoxic/oxic (SA), anaerobic-anoxic-oxic (SA-A-O), and alternately anaerobic sludge fermentation coupling anoxic denitrification (SA-A) reactors.
- Utilized sludge fermentation liquid as the carbon source for denitrification.
- Monitored nitrite accumulation and nitrate-to-nitrite transformation ratio (NTR) over 108 days.
Main Results:
- Transient nitrite accumulation observed in SA and SA-A-O systems.
- SA-A system achieved high nitrite accumulation (20.91 ± 0.52 mg/L) with complete nitrate reduction.
- An 80% nitrate-to-nitrite transformation ratio (NTR) was attained using SA-A sludge, indicating stable partial denitrification.
Conclusions:
- The SA-A sludge demonstrated superior performance for partial denitrification.
- Partial denitrification is feasible and stable using sludge fermentation liquid and appropriate seeding sludge.
- This study provides insights for enhancing integrated ANAMMOX systems for nitrate wastewater treatment.
