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

Microbial Mats01:25

Microbial Mats

59
Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...
59
Factors Influencing Microbial Growth: Osmolarity01:28

Factors Influencing Microbial Growth: Osmolarity

1.5K
Osmolarity is the measure of solute concentration in a solution. It plays a critical role in determining water availability for organisms. Water moves across semipermeable membranes through osmosis, flowing from regions of lower solute concentration (more dilute) to regions of higher solute concentration (more concentrated).In high-solute environments, microbial cells lose water, leading to dehydration and inhibited growth. The extent to which water is available to microbes in such environments...
1.5K
Marine Microbial Ecology01:30

Marine Microbial Ecology

50
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
50
Scale-Up Processes01:14

Scale-Up Processes

89
The scale-up of microbial fermentation processes is essential in industrial biotechnology, allowing the transition from laboratory-scale experiments to commercial-scale production while aiming to maintain product yield and quality. This process requires meticulous adjustment of equipment design, process parameters, and contamination control strategies to accommodate increasing culture volumes.At the laboratory scale, cultures are typically maintained in 1 to 10-liter glass or autoclavable...
89
Freshwater Microbial Ecology01:24

Freshwater Microbial Ecology

45
Freshwater systems such as streams, rivers, and lakes exhibit distinct physical and biological characteristics that influence their microbial communities. These environments are broadly categorized into lotic systems—those with flowing waters like streams and most rivers—and lentic systems, which include still or slow-moving waters such as lakes, ponds, and marshes.In lentic systems, phytoplankton drive primary production, generating autochthonous organic carbon. In contrast, lotic...
45
Bioreactor Controls-III01:22

Bioreactor Controls-III

55
Strain improvement is a foundational strategy in industrial microbiology aimed at maximizing microbial productivity, particularly because natural isolates typically yield commercially valuable products in very low concentrations. Although optimizing the culture medium and environmental conditions can improve yields, these adjustments are inherently limited by the organism’s genetic potential. As a result, the focus shifts toward genetic modifications to enhance biosynthetic capacity. The...
55

You might also read

Related Articles

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

Sort by
Same author

Stationary state distribution and efficiency analysis of the Langevin equation via real or virtual dynamics.

The Journal of chemical physics·2017
Same author

Optimized production and isolation of antibacterial agent from marine <i>Aspergillus flavipes</i> against <i>Vibrio harveyi</i>.

3 Biotech·2017
Same author

Preparation and antioxidant properties of low molecular holothurian glycosaminoglycans by H<sub>2</sub>O<sub>2</sub>/ascorbic acid degradation.

International journal of biological macromolecules·2017
Same author

Associations between single-nucleotide polymorphisms in the NTRK1 gene and basal pain sensitivity in young Han Chinese women.

Neuroscience letters·2017
Same author

Design, synthesis and antiproliferative effect of 17β-amide derivatives of 2-methoxyestradiol and their studies on pharmacokinetics.

Steroids·2017
Same author

MiR-324-3p promotes tumor growth through targeting DACT1 and activation of Wnt/β-catenin pathway in hepatocellular carcinoma.

Oncotarget·2017

Related Experiment Video

Updated: Apr 14, 2026

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge
06:10

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge

Published on: September 26, 2016

24.1K

Salinity-induced microbial acclimation and kinetic responses in continuous self-circulating granular sludge process.

Wei-Kang Qi1, Jian Song1, Li-Fang Liu1

  • 1National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Beijing University of Technology, Beijing 100124, China.

Bioresource Technology
|April 12, 2026
PubMed
Summary
This summary is machine-generated.

This study shows a novel aerobic granular sludge reactor effectively removes nitrogen from saline wastewater. Selective inhibition of nitrite-oxidizing bacteria (NOB) enabled stable partial nitrification-denitrification (PND) at high salinities.

Keywords:
Continuous flow bioreactorMicrobial acclimationPartial nitrification–denitrificationSalinity shockSalt inhibition kinetics

More Related Videos

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
15:19

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

Published on: October 15, 2015

10.3K
Aerobic Biodegradation Testing of Materials Using a Natural Marine Seawater Inoculum and Closed Loop Respirometer
08:43

Aerobic Biodegradation Testing of Materials Using a Natural Marine Seawater Inoculum and Closed Loop Respirometer

Published on: October 24, 2025

589

Related Experiment Videos

Last Updated: Apr 14, 2026

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge
06:10

Extraction of Structural Extracellular Polymeric Substances from Aerobic Granular Sludge

Published on: September 26, 2016

24.1K
Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor
15:19

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

Published on: October 15, 2015

10.3K
Aerobic Biodegradation Testing of Materials Using a Natural Marine Seawater Inoculum and Closed Loop Respirometer
08:43

Aerobic Biodegradation Testing of Materials Using a Natural Marine Seawater Inoculum and Closed Loop Respirometer

Published on: October 24, 2025

589

Area of Science:

  • Environmental Microbiology
  • Wastewater Treatment Engineering
  • Bioreactor Technology

Background:

  • Saline wastewater poses challenges for conventional biological nitrogen removal.
  • Aerobic granular sludge (AGS) reactors offer potential for efficient wastewater treatment.
  • Understanding microbial inhibition kinetics under varying salinity is crucial for process optimization.

Purpose of the Study:

  • To evaluate the performance of a novel continuous-flow AGS reactor (Zier) for treating saline wastewater.
  • To investigate the inhibition kinetics of key microbial groups (AOB and NOB) under different salinity levels.
  • To determine the optimal conditions for stable partial nitrification-denitrification (PND) in saline environments.

Main Methods:

  • Operation of a continuous-flow aerobic granular sludge (AGS) reactor (Zier) with varying salinity (1%-3%).
  • Monitoring of nitrogen removal efficiency and microbial activity (AOB and NOB).
  • Application of kinetic models (Aiba and Luong) to analyze salt inhibition effects on microbial populations.

Main Results:

  • The Zier reactor achieved 82% total nitrogen removal at 3% salinity via a stable PND pathway.
  • Ammonia-oxidizing bacteria (AOB) showed increased salt tolerance with acclimation, while nitrite-oxidizing bacteria (NOB) activity recovered at lower salinities (1%-2%).
  • The Luong model accurately described salt inhibition, revealing cooperative inhibition in AOB and progressive inhibition in NOB.

Conclusions:

  • The Zier AGS reactor effectively removes nitrogen from saline wastewater through the PND pathway.
  • Microbial kinetic analysis provides insights into salt tolerance mechanisms of AOB and NOB.
  • Findings offer strategies for controlling AGS processes in fluctuating salinity conditions.