Mixotrophic aerobic denitrification enhanced by inorganic electron donor: Novel insights into iron valence and nirS-type denitrifying bacterial community model

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60460709%3A41330%2F24%3A98250" target="_blank" >RIV/60460709:41330/24:98250 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.1016/j.jwpe.2024.105726" target="_blank" >https://doi.org/10.1016/j.jwpe.2024.105726</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jwpe.2024.105726" target="_blank" >10.1016/j.jwpe.2024.105726</a>

Result language

angličtina

Original language name

Mixotrophic aerobic denitrification enhanced by inorganic electron donor: Novel insights into iron valence and nirS-type denitrifying bacterial community model

Original language description

Nitrogen pollution was the main factor leading to reservoir eutrophication. The removal of low-concentration nitrate pollutants in water source reservoirs is an international problem to be solved. Insufficient organic electron donors in natural reservoir are a crucial limiting factor for in situ denitrification. Microbial mixotrophic aerobic denitrification using iron as the assisted electron donor is a potential pathway to treat micropolluted water bodies. The iron/activated carbon (IAC) was used to be an assisted electron provider to advance the mixotrophic aerobic denitrification performance of denitrifying bacterial community in micro-polluted reservoir water. Upon adding IAC into the reactors, the total nitrogen (TN) reduction capacity improved >41.10 %. A slight increase in organic matter removal efficiency observed in the IAC reactors compared to the control reactors. High-throughput sequencing revealed that IAC altered the richness, and co-occurrence of denitrifying bacterial community, further advancing nitrate transformation and removal. The relative abundant of Thauera, Dechloromonas, Cupriavidus, Alicycliphilus, and Azoarcus increased and presented predominant in the IAC reactors. Meanwhile, network analysis, niche width model, neutral community model, and species abundance distribution supported this finding. The Jinpen reservoir (JP; 34°32'38" N, 107°53'53" E, located in Xi'an, North China) and Xikeng reservoir (XK; 34°32'38" N, 107°53'53" E, located in Shenzhen, South China) raw water treatment experiments demonstrated excellent TN (> 60 %) and organic matter removal efficiencies (> 44 %).

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10511 - Environmental sciences (social aspects to be 5.7)

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

JOURNAL OF WATER PROCESS ENGINEERING

ISSN

2214-7144

e-ISSN

2214-7144

Volume of the periodical

64

Issue of the periodical within the volume

105726

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

12

Pages from-to

1-12

UT code for WoS article

001266095200001

EID of the result in the Scopus database

2-s2.0-85197427588