Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Dose-Response Relationship: Selectivity and Specificity01:25

Dose-Response Relationship: Selectivity and Specificity

9.7K
Drugs exert their therapeutic effects by interacting with receptors, enzymes, or ion channels that are present throughout the human body. The strength and duration of the interaction between a drug and its target receptor are characterized by the selectivity and specificity of the drug. Selectivity refers to a drug's strong preference for its intended target over other targets. For instance, isoprenaline, a non-selective β-adrenergic agonist, interacts with both β1- and...
9.7K
Definition and Measurement of Pressure: Atmospheric Pressure, Barometer, and Manometer02:57

Definition and Measurement of Pressure: Atmospheric Pressure, Barometer, and Manometer

43.1K
Gas pressure is caused by force exerted by gas molecules colliding with the surfaces of objects. Although the force of each collision is very small, any surface of an appreciable area experiences a large number of collisions in a short time, which can result in high pressure.
43.1K
What is Natural Selection?01:32

What is Natural Selection?

128.5K
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
128.5K
Vapor Pressure02:34

Vapor Pressure

40.4K
When a liquid vaporizes in a closed container, gas molecules cannot escape. As these gas phase molecules move randomly about, they will occasionally collide with the surface of the condensed phase, and in some cases, these collisions will result in the molecules re-entering the condensed phase. The change from the gas phase to the liquid is called condensation. When the rate of condensation becomes equal to the rate of vaporization, neither the amount of the liquid nor the amount of the vapor...
40.4K
Microbial Morphologies01:29

Microbial Morphologies

2.3K
Bacterial and archaeal cells exhibit remarkable diversity in shape and structure, critical in their adaptability and functionality. Among bacteria, the most commonly observed shapes include cocci and bacilli. Cocci are spherical and may exist singly or in groupings such as pairs (diplococci), chains (streptococci), clusters (staphylococci), or tetrads. Bacilli, in contrast, are rod-shaped and can also occur as single cells, in pairs, or chains, depending on their environmental and genetic...
2.3K
Microbial Fermentation01:23

Microbial Fermentation

1.4K
Fermentation is a crucial anaerobic metabolic process that enables microbes to derive energy from sugar without relying on oxygen or an electron transport chain. This process is fundamental to various biological and industrial applications and is classified based on the metabolic products generated.Role of Pyruvate in FermentationPyruvate and its derivatives serve as key electron acceptors in fermentative pathways. The oxidation of NADH to regenerate NAD+ is essential for the continuation of...
1.4K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Occurrence and risk assessment of typical PPCPs and biodegradation pathway of ribavirin in wastewater treatment plants.

Environmental science and ecotechnology·2022
Same author

Efficiencies and mechanisms of the chemical cleaning of fouled polytetrafluoroethylene (PTFE) membranes during the microfiltration of alkali/surfactant/polymer flooding oilfield wastewater.

RSC advances·2022
Same author

Quantifying relations and similarities of the meteorological parameters among the weather stations in the Alberta Oil Sands region.

PloS one·2022
Same author

Development of an ensemble of machine learning algorithms to model aerobic granular sludge reactors.

Water research·2020
Same author

Characterization of domestic wastewater released from 'green' households and field study of the performance of onsite septic tanks retrofitted into aerobic bioreactors in cold climate.

The Science of the total environment·2020
Same author

Augmentation of Biogranules for Enhanced Performance of Full-Scale Lagoon-Based Municipal Wastewater Treatment Plants.

Applied biochemistry and biotechnology·2020
Same journal

Corrigendum to "Electrically enhanced, Nature-Driven microbial attenuation of chromate and dichloromethane in groundwater" [Bioresour. Technol. 459 (2026) 135175].

Bioresource technology·2026
Same journal

Tetraselmis chuii: Valorization of dairy wastewater using lactose as an alternative carbon source to glucose/galactose.

Bioresource technology·2026
Same journal

Flow-driven structural and transcriptomic responses in syntrophic electroactive biofilms.

Bioresource technology·2026
Same journal

Accelerated algal-bacterial granulation through synergistic physical-ionic stimulation: start-up efficiency and mechanistic insights.

Bioresource technology·2026
Same journal

Production of gamma-polyglutamic acid with tunable molecular weight via electrofermentation using soybean protein concentrate as a feedstock.

Bioresource technology·2026
Same journal

Sustainable valorization of sweet potato residues into cellulose nanofibers via sodium percarbonate pretreatment.

Bioresource technology·2026
See all related articles

Related Experiment Video

Updated: Jan 28, 2026

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors
07:59

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors

Published on: December 6, 2018

8.6K

Denitrification performance and microbial versatility in response to different selection pressures.

Roya Pishgar1, John Albino Dominic1, Zhiya Sheng1

  • 1Department of Civil Engineering, University of Calgary, Calgary, Canada.

Bioresource Technology
|February 25, 2019
PubMed
Summary
This summary is machine-generated.

Microbial communities show higher anoxic denitrification rates than aerobic. Nourishment conditions, not oxygen, dictate microbial selection and nitrogen removal pathways, impacting overall efficiency.

Keywords:
Aerobic denitrificationAerobic granulationDenitrifiersEcological nicheNitrogen removal mechanismSuspended biomass

More Related Videos

Evaluating Leaf Responses to Microbial Secondary Metabolites Using A High-Throughput Format
05:51

Evaluating Leaf Responses to Microbial Secondary Metabolites Using A High-Throughput Format

Published on: December 5, 2025

430
Pyrosequencing for Microbial Identification and Characterization
12:37

Pyrosequencing for Microbial Identification and Characterization

Published on: August 22, 2013

47.9K

Related Experiment Videos

Last Updated: Jan 28, 2026

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors
07:59

Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors

Published on: December 6, 2018

8.6K
Evaluating Leaf Responses to Microbial Secondary Metabolites Using A High-Throughput Format
05:51

Evaluating Leaf Responses to Microbial Secondary Metabolites Using A High-Throughput Format

Published on: December 5, 2025

430
Pyrosequencing for Microbial Identification and Characterization
12:37

Pyrosequencing for Microbial Identification and Characterization

Published on: August 22, 2013

47.9K

Area of Science:

  • Environmental microbiology
  • Wastewater treatment technologies
  • Biogeochemical cycles

Background:

  • Denitrification is crucial for removing nitrogen from wastewater.
  • Understanding microbial community dynamics under different selection pressures is key to optimizing nitrogen removal.
  • Aerobic and anoxic denitrification pathways have distinct microbial requirements and efficiencies.

Purpose of the Study:

  • To investigate the functional dynamics of microbial communities in response to varying selection pressures, focusing on denitrification.
  • To compare aerobic and anoxic nitrate and nitrite reduction capabilities.
  • To identify key microbial players involved in different denitrification processes and elucidate the primary nitrogen removal mechanisms in granular biomass.

Main Methods:

  • Suspended-biomass experiments were conducted to assess denitrification rates under aerobic and anoxic conditions.
  • Granular biomass experiments were performed to evaluate nitrogen removal efficiency and identify key organisms.
  • Biodiversity analysis was employed to understand microbial selection pressures and their impact on nitrogen removal mechanisms.

Main Results:

  • Anoxic denitrification exhibited higher nitrate and nitrite reduction rates compared to aerobic conditions.
  • Key denitrifiers were identified, including complete aerobic (Dokdonella, Flavobacterium, Ca. Accumulibacter) and anoxic (Acinetobacter, Pseudomonas, Arcobacter, Comamonas) denitrifiers.
  • Granular biomass effectively removed ammonium without NOx- accumulation, suggesting heterotrophic nitrification and aerobic denitrification as primary pathways, potentially mediated by Thauera and Flavobacterium.

Conclusions:

  • Nourishment conditions, rather than oxygen availability, were identified as the decisive factor in microbial selection and nitrogen removal mechanisms.
  • The study highlights the potential of specific microbial communities and pathways for efficient nitrogen removal in wastewater treatment.
  • Further research into optimizing conditions for key denitrifiers like Thauera and Flavobacterium could enhance wastewater treatment efficacy.