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

The Phosphorus Cycle01:21

The Phosphorus Cycle

44.0K
Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.
44.0K
Chirality at Nitrogen, Phosphorus, and Sulfur02:30

Chirality at Nitrogen, Phosphorus, and Sulfur

7.0K
Chirality is most prevalent in carbon-based tetrahedral compounds, but this important facet of molecular symmetry extends to sp3-hybridized nitrogen, phosphorus and sulfur centers, including trivalent molecules with lone pairs. Here, the lone pair behaves as a functional group in addition to the other three substituents to form an analogous tetrahedral center that can be chiral.
A consequence of chirality is the need for enantiomeric resolution. While this is theoretically possible for all...
7.0K
Oxygen Transport in the Blood01:27

Oxygen Transport in the Blood

6.7K
Hemoglobin (Hb) is a crucial molecule in the human body, consisting of four polypeptide chains, each bound to an iron-containing heme group. This unique structure enables hemoglobin to bind to oxygen, with each molecule capable of combining with four molecules of oxygen, leading to rapid and reversible oxygen loading. When fully loaded with oxygen, it is called oxyhemoglobin, while hemoglobin that has released oxygen is called reduced hemoglobin or deoxyhemoglobin. As hemoglobin binds oxygen,...
6.7K
Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen01:16

Oxygen Delivering System II: Venturi Mask and Transtracheal Oxygen

2.4K
Oxygen therapy is a pivotal aspect of medical care, particularly for patients with respiratory ailments. Two prominent oxygen-delivering systems include the Venturi mask and the transtracheal oxygen catheter.
Venturi Mask
The Venturi mask, named after the Venturi effect, is designed to deliver precise oxygen concentrations. It consists of a large tube with an oxygen inlet that narrows down, causing a pressure drop that pulls air in through adjustable side ports. The mask is a lightweight,...
2.4K
Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

792
Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate...
792
Conditions on Early Earth02:06

Conditions on Early Earth

101.7K
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
101.7K

You might also read

Related Articles

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

Sort by
Same author

Myeloid Cdc42 deficiency-mediated macrophage pyroptosis exacerbates diabetic cardiomyopathy in type 1 diabetes mellitus.

Cardiovascular diabetology·2026
Same author

A case of cardiac calcified amorphous tumor: the potential value of myocardial contrast echocardiography.

Journal of geriatric cardiology : JGC·2026
Same author

[Various models of itch induction and their relationship to pain sensitivity].

Sheng li xue bao : [Acta physiologica Sinica]·2026
Same author

Dysregulation of U12-Type Splicing in Lupus Neutrophils.

Arthritis & rheumatology (Hoboken, N.J.)·2026
Same author

Clinicopathological characteristics, incidence trends, and prognostic factors of salivary gland secretory carcinoma: a SEER database analysis (2011-2021).

European archives of oto-rhino-laryngology : official journal of the European Federation of Oto-Rhino-Laryngological Societies (EUFOS) : affiliated with the German Society for Oto-Rhino-Laryngology - Head and Neck Surgery·2026
Same author

Development and validation of a risk nomogram for predicting recurrence in patients with non-valvular atrial fibrillation after radiofrequency catheter ablation.

BMC medical informatics and decision making·2026

Related Experiment Video

Updated: Feb 8, 2026

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading
10:49

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading

Published on: March 6, 2014

17.8K

[Phosphorus Removal Performance in EBPR System under Extra-low Dissolved Oxygen Condition].

Juan Ma1, Lu Song1, Xiao-Jun Yu1

  • 1School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.

Huan Jing Ke Xue= Huanjing Kexue
|July 3, 2018
PubMed
Summary

Controlled dissolved oxygen in sequencing batch reactors significantly improved enhanced biological phosphorus removal (EBPR). Micro-aerobic conditions maintained high phosphorus removal efficiency, meeting discharge standards consistently.

Keywords:
aerationanaerobicdissolved oxygenenhanced biological phosphorus removal(EBPR)ratio of phosphorus uptake rate

More Related Videos

A Simple Approach to Manipulate Dissolved Oxygen for Animal Behavior Observations
06:20

A Simple Approach to Manipulate Dissolved Oxygen for Animal Behavior Observations

Published on: June 28, 2016

9.8K
Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

8.3K

Related Experiment Videos

Last Updated: Feb 8, 2026

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading
10:49

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading

Published on: March 6, 2014

17.8K
A Simple Approach to Manipulate Dissolved Oxygen for Animal Behavior Observations
06:20

A Simple Approach to Manipulate Dissolved Oxygen for Animal Behavior Observations

Published on: June 28, 2016

9.8K
Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance
09:02

Synthesis of Platinum-nickel Nanowires and Optimization for Oxygen Reduction Performance

Published on: April 27, 2018

8.3K

Area of Science:

  • Environmental Engineering
  • Water Treatment Technologies
  • Microbial Ecology

Background:

  • Enhanced biological phosphorus removal (EBPR) is crucial for wastewater treatment.
  • Optimizing dissolved oxygen (DO) levels is key to EBPR efficiency.
  • Previous studies suggest DO impacts phosphorus removal, but optimal ranges require further investigation.

Purpose of the Study:

  • To investigate the impact of different dissolved oxygen (DO) gradients on EBPR performance in sequencing batch reactors (SBRs).
  • To evaluate phosphorus removal efficiency and process stability under varying aerobic DO concentrations.
  • To determine the feasibility of micro-aerobic EBPR for energy-efficient phosphorus removal.

Main Methods:

  • Operation of two SBRs with alternating anaerobic/oxic (An/O) phases for 127 days.
  • Reactor R1: Uncontrolled DO (up to 6 mg·L⁻¹).
  • Reactor R2: Controlled DO levels (2, 1, 0.5, 0.2, 0.1 mg·L⁻¹) during aerobic stages.

Main Results:

  • Reactor R1 showed initial high phosphorus removal (>95.9%) but deteriorated due to excessive aeration, with only 39.4% meeting standards.
  • Reactor R2 achieved stable performance, with 94.6% of effluent total phosphorus (TP) meeting national standards.
  • Specific phosphate uptake peaked at DO=2 mg·L⁻¹, while micro-aerobic conditions (0.1 mg·L⁻¹) ensured 100% compliance despite slower degradation.

Conclusions:

  • Controlled DO levels in micro-aerobic EBPR systems significantly enhance phosphorus removal efficiency and process stability.
  • Excessive aeration in EBPR can lead to performance deterioration.
  • Micro-aerobic EBPR offers a feasible and energy-saving approach for effective phosphorus removal from wastewater.