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Water
Special Issues
Nitrogen Removal and Nitrous Oxide Emission in Wastewater Treatment
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Nitrogen Removal and Nitrous Oxide Emission 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 (31 July 2022) | Viewed by 3916

Special Issue Editors

Dr. Guoqiang Liu

E-Mail Website
Guest Editor
School of Environment, Jinan University, Guangzhou, China
Interests: nitrification; nitrifier; nitrous oxide; nitrogen removal; biofilms; biological wastewater treatment; membrane bioreactor
Prof. Dr. Xin Zhou

E-Mail Website
Guest Editor
College of Environmental Sciences and Engineering, Taiyuan University of Technology, Taiyuan, China
Interests: advanced wastewater treatment technology；biological nitrogen-removal process；advanced oxidation process；greenhouse gas and emerging pollutants control
Special Issues, Collections and Topics in MDPI journals
Dr. Liang Zhang

E-Mail Website
Guest Editor
National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Beijing University of Technology, Beijing, China
Interests: biological nitrogen removal; wastewater treatment; nitrification; anammox; biofilms; sludge treatment

Special Issue Information

Dear Colleagues,

Nitrogen removal from wastewater is very important for water environment protection, and many countries and areas are enhancing nitrogen removal requirements. In wastewater treatment plants, removing nitrogen is very energy intensive and cost consuming. Moreover, nitrification and denitrification in wastewater treatment are important emission sources for nitrous oxide, which is an important greenhouse gas and a dominant ozone-depleting substance. Therefore, this Special Issue of Water will focus on “Nitrogen Removal and Nitrous Oxide Emission in Wastewater Treatment” and provide a platform for exhibiting and discussing new discoveries and developments.

Research topics in this Special Issue may include (but are not limited to) the following: (1) novel pathways and microbes for nitrogen transformation in wastewater treatment; (2) the kinetics and nitrifiers in extreme environments, e.g., low dissolved oxygen and acidic environments; (3) novel nitrogen removal processes for wastewater treatment; (4) emission mechanisms and control strategies of nitrous oxide during wastewater treatment; and (5) novel bioreactors for enhanced nitrogen removal.

Both original research articles and reviews are of interest.

Dr. Guoqiang Liu
Prof. Dr. Xin Zhou
Dr. Liang Zhang
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • nitrification
  • denitrification
  • partial nitrification
  • anammox
  • comammox
  • nitrous oxide
  • nitrogen removal
  • wastewater
  • bioreactors

Published Papers (1 paper)

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Research

13 pages, 1958 KiB  
Communication
Nitrogen Removal by an Anaerobic Iron-Dependent Ammonium Oxidation (Feammox) Enrichment: Potential for Wastewater Treatment
by Carolina Rodríguez, Jaime Cisternas, Jennyfer Serrano and Eduardo Leiva
Water 2021, 13(23), 3462; https://doi.org/10.3390/w13233462 - 6 Dec 2021
Cited by 12 | Viewed by 3226
Abstract
Nitrogen pollution in water is a growing concern. Anthropogenic activities have increased the amount of nitrogen released into watercourses, which harms human health and the environment, and causes serious problems, such as eutrophication. Feammox is a recently discovered biological pathway associated with the [...] Read more.
Nitrogen pollution in water is a growing concern. Anthropogenic activities have increased the amount of nitrogen released into watercourses, which harms human health and the environment, and causes serious problems, such as eutrophication. Feammox is a recently discovered biological pathway associated with the nitrogen cycle that has gained scientific interest. This process couples anaerobic ammonium oxidation with iron reduction. This work presents a study on the Feammox mechanism from the enrichment of an activated sludge obtained from a sewage treatment plant. The enrichment was carried out at neutral pH to study the N2 pathway, that is, the Feammox process with the oxidation of ammonium (NH4+) directly to N2. In addition, different sources of iron were studied: iron chloride (FeCl3); ferrihydrite; and goethite. The characterization of the sludge showed the genes associated with ammonia monooxygenase, nitrate and nitrite reductases processes, along with relevant microbial species. The enrichment, carried out for 42 days and monitored every 14 days, showed that FeCl3 as a source of Fe was more effective for the coupled process of oxidation of NH4+ and the reduction of Fe(III) to Fe(II). At the end of the enrichment period, a removal of 31% and 32.2% of NH4+, and an increase in Fe(II) concentration by 52.4 and 63.9 times regarding the initial value were achieved in aerobic and anaerobic sludge, respectively. This study provides information on the potential of Feammox in the removal of N from wastewater, and the oxidation/reduction yields in the initial enrichment phase. Full article
(This article belongs to the Special Issue Nitrogen Removal and Nitrous Oxide Emission in Wastewater Treatment)
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