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Sulfidation forwarding high-strength Anammox process using nitrate as electron acceptor via thiosulfate-driven
Wenmin Lin1, Jiyu Feng1, Keqiang Hu1
1Ministry of Education Key Laboratory of Pollution Control and Ecological Remediation for Industrial Agglomeration Area, School of Environment and Energy, South China University of Technology, Guangzhou 510006, China.
Bioresource Technology
|November 17, 2021
Summary
This study introduces a novel sulfurized Anammox process for efficient ammonium and nitrate removal from wastewater. The S⁰@Anammox granules achieved high total nitrogen removal efficiency, even with high free ammonia concentrations.
Area of Science:
- Environmental microbiology
- Wastewater treatment technologies
- Biogeochemical cycles
Background:
- High ammonium and nitrate concentrations pose significant challenges in wastewater treatment.
- Existing methods for nitrogen removal can be energy-intensive and costly.
- The need for efficient and sustainable nitrogen removal strategies is critical.
Purpose of the Study:
- To develop and evaluate a novel thiosulfate-driven nitrate denitratation coupled with sulfurized Anammox (TDSA) process.
- To assess the efficiency of S⁰@Anammox granules in removing high-content ammonium and nitrate.
- To investigate the underlying microbial mechanisms and operational parameters of the TDSA process.
Main Methods:
- Utilized up-flow reactors with core-shell S⁰@Anammox granules.
- Investigated the performance under high loading rates and free ammonia concentrations.
- Employed sequencing analysis to identify microbial communities and metabolic pathways.
Main Results:
- Achieved 83.66% total nitrogen removal efficiency (TNRE) at a high loading rate (2.6 kg-N/m³·d).
- Demonstrated resistance to high free ammonia concentrations (22.35 mg/L) via S⁰/Sn²⁻-driven partial denitrification-Anammox (PDN-Anammox).
- Observed 74.47% TNRE under intermittent aeration, attributed to partial nitrification-Anammox (PN-Anammox).
- Identified coexistence of Candidatus Kuenenia and Thiobacillus, with Anammox primarily via NO.
Conclusions:
- The TDSA process offers a cost-effective and energy-saving solution for high-nitrogen wastewater.
- S⁰@Anammox granules are robust and efficient in challenging wastewater conditions.
- This study provides a new perspective for nitrogen removal in engineering applications.
Keywords:
AnammoxAutotrophic denitrificationHigh ammonium wastewaterNitrogen removalSulfur-oxidizing bacteriaMore Related Videos
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