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Advanced Use of Anammox Process in Wastewater Treatment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: closed (10 December 2024) | Viewed by 1247

Special Issue Editors


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Guest Editor
School of Environmental Engineering and Science, Yangzhou University, Yangzhou, China
Interests: anammox; wastewater treatment; nitrogen removal; sustainability; process op-timization; technological advancements; environmental engineering; biological treatment
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
School of Environmental Engineering and Science, Yangzhou University, Yangzhou, China
Interests: anammox; wastewater treatment; nitrogen removal; sustainability; process optimization; technological advancements; environmental engineering; biological treatment

Special Issue Information

Dear Colleagues,

This Special Issue on "Advanced Use of Anammox Process in Wastewater Treatment" focuses on the innovative application and optimization of the anaerobic ammonium oxidation (anammox) process in wastewater treatment. This issue aims to present cutting-edge research, technological advancements, and practical implementations of the anammox process to enhance nitrogen removal efficiency and sustainability in wastewater management. By situating this Special Issue within the existing literature, it addresses the critical need for sustainable nitrogen removal solutions and highlights recent breakthroughs that overcome the limitations of conventional methods. Contributions will include experimental studies, modeling approaches, and case studies demonstrating the feasibility and benefits of integrating anammox into various wastewater treatment systems. This Special Issue will serve as a valuable resource for researchers, engineers, and policymakers aiming to advance the field of wastewater treatment and promote environmental sustainability

Prof. Dr. Jun Wu
Dr. Wenjing Chen
Guest Editors

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Keywords

  • anammox
  • wastewater treatment
  • nitrogen removal
  • sustainability
  • process optimization
  • technological advancements
  • environmental engineering
  • biological treatment

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Published Papers (1 paper)

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Research

15 pages, 3559 KiB  
Article
Tolerance of the Marine Anammox Candidatus Scalindua to High Nitrate Concentrations: Implications for Recirculating Aquaculture Systems
by Jonathan Armand Charles Roques, Ebuka Unegbu, Naoki Fujii, Amélie Marqué, Federico Micolucci, Kristina Snuttan Sundell and Tomonori Kindaichi
Water 2024, 16(24), 3705; https://doi.org/10.3390/w16243705 - 22 Dec 2024
Cited by 1 | Viewed by 920
Abstract
Recirculating aquaculture systems (RAS) hold significant potential for sustainable aquaculture by providing a stable, controlled environment that supports optimal fish growth and welfare. In RAS, ammonium (NH4+) is biologically converted into nitrate (NO3) via nitrite (NO2 [...] Read more.
Recirculating aquaculture systems (RAS) hold significant potential for sustainable aquaculture by providing a stable, controlled environment that supports optimal fish growth and welfare. In RAS, ammonium (NH4+) is biologically converted into nitrate (NO3) via nitrite (NO2) by nitrifying bacteria. As a result, NO3 usually accumulates in RAS and must subsequently be removed through denitrification in full RAS, or by regular water exchanges in partial RAS. The marine anammox bacteria Candidatus Scalindua can directly convert toxic NH4+ and NO2 into harmless nitrogen gas (N2) and has previously been identified as a promising alternative to the complex denitrification process or unsustainable frequent water exchanges in marine RAS. In this study, we evaluated the impact of high NO3 levels typically encountered in RAS on the performance and abundance of Ca. Scalindua in a laboratory-scale bioreactor. The bacterial composition of the granules, including the relative abundance of key nitrogen-cycling taxa, was analyzed along with the functional profile (i.e., NH4+ and NO2 removal efficiencies). For this purpose, a bioreactor was inoculated and fed a synthetic feed, enriched in NH4+, NO2, minerals and trace elements until stabilization (Phase 1, 52 days). NO3 concentrations were then gradually increased to 400 mg·L−1 NO3-N (Phase 2, 52 days), after which the reactor was followed for another 262 days (Phase 3). The reactor maintained high removal efficiencies; 88.0 ± 8.6% for NH4+ and 97.4 ± 1.7% for NO2 in Phase 2, and 95.0 ± 6.5% for NH4+ and 98.6 ± 2.7% for NO2 in Phase 3. The relative abundance of Ca. Scalindua decreased from 22.7% to 10.2% by the end of Phase 3. This was likely due to slower growth of Ca. Scalindua compared to heterotrophic bacteria present in the granule, which could use NO3 as a nitrogen source. Fluorescence in situ hybridization confirmed the presence of a stable population of Ca. Scalindua, which maintained high and stable NH4+ and NO2 removal efficiencies. These findings support the potential of Ca. Scalindua as an alternative filtering technology in marine RAS. Future studies should investigate pilot-scale applications under real-world conditions. Full article
(This article belongs to the Special Issue Advanced Use of Anammox Process in Wastewater Treatment)
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