Special Issue "Biological Nitrogen Removal from Wastewater and Groundwater"

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

Deadline for manuscript submissions: closed (20 August 2022) | Viewed by 1155

Special Issue Editor

Department of Horticulture and Landscape Architecture, Purdue University, West Lafayette, IN, USA
Interests: bioinformatics; biostatistics; metagenomics; microbial ecology; genomics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Nitrogen is one of the most concerning constituents that threatens aquatic ecosystems worldwide. Throughout the history of wastewater treatment, nitrogen has been one of the primary target contaminants to remove, and therefore much effort has been spent on its removal. However, the environmental problems that nitrogen causes are still unsolved in many regions, in which surface and/or groundwater with high and stable concentrations of nitrogen can still be found, severely affecting water bodies and their flora and fauna.

In addition to the different sites and engineered ecosystems where nitrogen contamination are important, there has been brilliant work done on the development of novel technologies for the treatment of nitrogen in wastewater, such as those based on electrochemical processes or mediated by recently discovered metabolisms of novel microorganisms such as DPANN archaeal members, which promote different pathways for nitrogen removal and/or add value to the removal of nitrogen from wastewater or groundwater.

For these reasons, this Special Issue becomes of importance for the field of nitrogen removal from wastewater. The dissemination of research that can cast light on ecological systems under nitrogen stress and in situ remediation techniques, as well as new advances on recently developed nitrogen removal mechanisms that can compete with the traditional systems, is fundamental to the continued mitigation of the impact that this contaminant is still generating on our aquatic ecosystems.

Thus, this new Special Issue of Water titled ‘Removal of nitrogen from wastewater and groundwater’ will gather contributions on these topics:

  • Novel processes for removal of nitrogen from wastewater and groundwater;
  • In situ remediation techniques for aquatic environments under nitrogen pollution stresses.

Dr. Alejandro Rodriguez-Sanchez
Guest Editor

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  • denitrification
  • anaerobic ammonium oxidation (anammox)
  • nitrite/nitrate-dependent anaerobic methane oxidation (n-DAMO)
  • bioelectrochemical processes
  • eutrophication
  • groundwater
  • wetlands
  • agriculture runoff
  • granular sludge
  • membrane processes

Published Papers (1 paper)

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A Sequential Anammox Zeolite-Biofilter for the Removal of Nitrogen Compounds from Drinking Water
Water 2022, 14(21), 3512; https://doi.org/10.3390/w14213512 - 02 Nov 2022
Cited by 1 | Viewed by 831
The ever-increasing consumption of ammonium fertilizer threatens aquatic environments and will require low-power water treatment processes. With a focus on the treatment of drinking water, the scope of this study was to investigate the feasibility of a sequential Anammox zeolite-biofilter with an anaerobic [...] Read more.
The ever-increasing consumption of ammonium fertilizer threatens aquatic environments and will require low-power water treatment processes. With a focus on the treatment of drinking water, the scope of this study was to investigate the feasibility of a sequential Anammox zeolite-biofilter with an anaerobic river and tap water mixture (NH4+: 4.3 mg/L; NO2: 5.7 mg/L). When the filter velocity was set to 0.032 m/h, NH4+ and NO2 were removed with efficiencies of 86% and 76%, respectively. Remarkably, lowering the substrate concentrations and operating temperatures only resulted in a minor reduction in the efficiencies of nitrogen removal compared to wastewater treatment plants. The coupling of the zeolite and Anammox processes influenced the NO2/NH4+-ratio as the zeolites removed NH4+ at a higher rate. Reliable process monitoring can be achieved by correlating the electrical conductivity and the removal of nitrogen compounds (R2 = 0.982). The WHO threshold values of all nitrogen compounds could be met using this setup, and thus, it could lead to a significant improvement in drinking water quality around the world. Thus, the Anammox zeolite-biofilter is promising as a cost-effective and low-power technology, especially for decentralized use in threshold and developing countries, and should therefore be the subject of further investigation. Full article
(This article belongs to the Special Issue Biological Nitrogen Removal from Wastewater and Groundwater)
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