Enhanced long-term nitrogen removal and its quantitative molecular mechanism in tidal flow constructed wetlands

Environmental Science & Technology
Wei ZhiChunguang He

Abstract

Tidal flow constructed wetlands (TF CWs) have recently been studied as a sustainable technology to achieve enhanced nitrogen removal; however, the underlying mechanisms responsible for removing ammonium (NH4(+)) and nitrate (NO3(-)) have not been compared and quantified at the molecular level (genes) in controlled TF CWs. In this study, two TF CWs T1 (treating NH4(+) wastewater) and T2 (treating NO3(-) wastewater) achieved high removal efficiencies for chemical oxygen demand (COD, 92 ± 2.7% and 95 ± 2.4%, respectively), NH4(+)/NO3(-) (76 ± 3.9% and 97 ± 2.2%, respectively), and total nitrogen (TN, 81 ± 3.5% and 93 ± 2.3%, respectively). Combined analyses revealed that the presence of simultaneous nitrification, anammox, and denitrification processes and the coupling of dissimilatory nitrate reduction to ammonium, ammonia oxidation, and anammox were the primary reason accounted for the robust treatment performance in T1 and T2, respectively. Results from stepwise regression analysis suggested that the NH4(+) removal rate in T1 was collectively controlled by amoA, nxrA, and anammox, while the NO3(-) removal rate in T2 was governed by nxrA and narG gene.

References

Sep 1, 1993·Applied and Environmental Microbiology·P VölklK O Stetter
Aug 3, 2002·Water Research·A Olav SliekersM S M Jetten
Sep 16, 2005·Nature·Kevin R Arrigo
Sep 24, 2005·Nature·Martin KönnekeDavid A Stahl
Sep 8, 2006·Applied and Environmental Microbiology·Ellen KandelerLaurent Philippot
Nov 3, 2006·The Science of the Total Environment·Jan Vymazal
Jan 25, 2007·Water Environment Research : a Research Publication of the Water Environment Federation·Wen-Sheng OuHsien-Te Lin
Nov 28, 2008·Water Research·Gabriel Maltais-LandryFlorent Chazarenc
Feb 24, 2009·Water Research·Jia YouZhiqiang Hu
Aug 12, 2009·Water Research·Marlies J KampschreurMark C M van Loosdrecht
Oct 8, 2009·Water Science and Technology : a Journal of the International Association on Water Pollution Research·A AlbuquerqueP Kowalik
Nov 20, 2013·The Science of the Total Environment·Yuansheng HuAnna Rymszewicz

❮ Previous
Next ❯

Citations

Jan 19, 2016·The Science of the Total Environment·Li YuanHusen Zhang
Jan 9, 2016·Journal of Hazardous Materials·Li YuanHusen Zhang
Oct 16, 2015·Environmental Science & Technology·Yunmeng PangGuodong Ji
Apr 29, 2015·Bioresource Technology·Jianping FanQiang He
Jul 6, 2016·Water Research·Nikolaos V ParanychianakisNicolas Kalogerakis
Oct 29, 2018·Environmental Science and Pollution Research International·Wendong Tao
Sep 28, 2017·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Mao LiuKai Yang
Aug 15, 2017·Environmental Science and Pollution Research International·Xia ShiYouhao Shen
Jul 1, 2018·Environmental Science and Pollution Research International·Suhad A A A N AlmuktarMiklas Scholz
Oct 24, 2017·Frontiers in Microbiology·Haishu SunXuliang Zhuang
Jul 8, 2020·International Journal of Environmental Research and Public Health·Qiong WanShan Huang
Nov 29, 2020·The Science of the Total Environment·Manping ZhangWeili Zhou
Jul 14, 2020·Bioresource Technology·Shuangyu TangGuodong Ji
Sep 26, 2020·Ecotoxicology and Environmental Safety·Jiaxing LuJian Zhang

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.