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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 4696

Special Issue Editors


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Guest Editor
School of Environment, Jinan University, Guangzhou, China
Interests: nitrification; nitrifier; nitrous oxide; nitrogen removal; biofilms; biological wastewater treatment; membrane bioreactor

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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

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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

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Keywords

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

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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 13 | Viewed by 3860
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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