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eISSN: 2083-5906
ISSN: 1230-1485
ISSN: 1230-1485
ORIGINAL RESEARCH
Research on Nitrate Removal from
Recirculating Aquaculture Systems Using
Solid-phase Denitrification Process
1
Jiangsu Key Laboratory for Bioresources of Saline Soil, Yancheng Teachers University, Yancheng 224007, China
2
Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers
University, Yancheng 224007, China
3
College of Ocean and Bioengineering, Yancheng Teachers University, Yancheng 224007, China
4
National Engineering Laboratory for Lake Pollution Control and Ecological Restoration, State Environmental
Protection Key Laboratory of Drinking Water Source Protection, Chinese Research Academy of Environmental
Sciences, Beijing 100012, China
Submission date: 2025-02-15
Final revision date: 2025-06-10
Acceptance date: 2025-06-24
Online publication date: 2025-11-07
Corresponding author
Shusong Zhang
College of Ocean and Bioengineering, Yancheng Teachers University, Yancheng 224007, China
College of Ocean and Bioengineering, Yancheng Teachers University, Yancheng 224007, China
KEYWORDS
TOPICS
ABSTRACT
In order to solve the problem of significant nitrate accumulation during the process of factorycirculating
aquaculture, which affects the growth and development of aquaculture species, this project
added a solid-phase denitrification (SPD) treatment unit to the recirculating aquaculture system (RAS)
to explore the removal effect of the treatment unit on nitrate in the aquaculture water and the change
of the microbial community structure of each unit in the RAS before and after the setting of the
SPD unit. The results showed that the SPD treatment unit can remove nitrate accumulated by RAS
to approximately 40 mg/L after 100 days of operation, with a nitrate removal rate of 0.32 g/(L·d).
The analysis of microbial community structure showed that in each unit of the RAS, Proteobacteria,
Bacteroidetes, and Cyanobacteria were all dominant phyla before and after the setting of SPD units,
although their abundance changed. Experiments have proved that setting up an SPD treatment unit
in the RAS can better purify the nitrate pollution accumulated in the system, which provides certain
theoretical reference and technical support for its large-scale practical application.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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