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 Experiment Videos

Promoting nitrification by using functional gel as immobilizing medium under different temperature stimulation

Lin-Jiang Yuan1, Tetsuya Kusuda, Takahiro Kuba

  • 1Department of Urban and Environmental Engineering, Kyushu University, Fukuoka, Japan.

Journal of Environmental Science and Health. Part A, Toxic/Hazardous Substances & Environmental Engineering
|July 10, 2004
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

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

Sort by
Same author

Retraction notice to "Efficient cesium encapsulation from contaminated water by cellulosic biomass based activated wood charcoal" [Chemosphere 262, January 2021, 127801].

Chemosphere·2025
Same author

Self-driven electrochemical system for struvite and energy recovery from digested wastewater: Device optimization strategy and long-term operation.

Journal of environmental management·2025
Same author

Assessment of heavy metals accumulation by vegetables irrigated with different stages of textile wastewater for evaluation of food and health risk.

Journal of environmental management·2024
Same author

Electrochemically mediated phosphorus and energy recovery from digested effluent.

Journal of environmental management·2023
Same author

Applying sheet iron to enhance the treatment efficiency of digested effluent with continuous flow and the corresponding mechanism.

Chemosphere·2023
Same author

Condition optimization of iron-air fuel cell to treat phosphate-containing wastewater regarding sustainable development.

Chemosphere·2022
Same journal

HPLC-MS method for tracing multiclass PPCPs in soil and water: optimization of ionization and extraction strategies.

Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering·2026
Same journal

Preparation of a composite dust suppressant and investigation of its toxicity to lung tissue in C57BL/6 mice.

Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering·2026
Same journal

Biodegradation of trimethoprim antibiotic by white rot fungus <i>Trametes hirsuta</i> D7 and its laccase: quantitative analysis, molecular docking, and metabolic pathway.

Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering·2026
Same journal

Sequential struvite precipitation and biological processes for effective removal of ammonium nitrogen from latex concentrate wastewater.

Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering·2026
Same journal

Effects of organochlorine pesticides (OCPs) on adolescent body composition: Integrating epidemiology and bioinformatics.

Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering·2026
Same journal

PM<sub>2.5</sub> chemical composition in Cape Town, South Africa.

Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering·2026
See all related articles

Temperature-responsive N-isopropylacrylamide-Chlorophyll (NIPA-CH) gel enhances biological nitrification. Optimal cyclic temperature stimuli promote substrate transfer and nitrification, while frequent changes can wash out nitrifiers.

Area of Science:

  • Environmental Microbiology
  • Biotechnology
  • Chemical Engineering

Background:

  • Nitrification is a crucial process in wastewater treatment for removing ammonia.
  • Immobilizing nitrifying bacteria can improve process efficiency and stability.
  • Temperature-responsive hydrogels offer potential for controlled release and enhanced microbial activity.

Purpose of the Study:

  • To investigate the effect of cyclic temperature stimuli on nitrification using NIPA-CH gel-immobilized nitrifiers.
  • To compare nitrification performance under cyclic temperature stimulation versus constant temperature.
  • To explore the practical application of this technology in wastewater treatment.

Main Methods:

  • Immobilization of nitrifiers within N-isopropylacrylamide-Chlorophyll (NIPA-CH) gel.

Related Experiment Videos

  • Application of cyclic temperature stimuli (e.g., 32-36°C, 32-34°C) with varying periods (2h, 4h).
  • Monitoring of nitrification rates, nitrite oxidation, and oxygen consumption of immobilized nitrifiers.

    • Main Results:

    • Reversible swelling and shrinking of NIPA-CH gel under cyclic temperature stimuli promoted nitrification.
    • Optimal temperature cycles (32-36°C or 32-34°C with 4h or 2h periods) enhanced substrate transfer and nitrification.
    • Frequent temperature changes (32-36°C, 2h cycle) led to decreased nitrite oxidation and nitrifier washout.
    • Oxygen consumption was higher during swelling phases at 32°C but reduced during shrinking phases at 36°C.

    Conclusions:

    • Cyclic temperature stimulation of NIPA-CH gel can effectively promote biological nitrification.
    • Adequate temperature stimuli facilitate substrate transfer, enhancing nitrification efficiency.
    • Overly frequent temperature fluctuations can negatively impact nitrification by causing nitrifier washout.
    • NIPA-CH gel immobilization presents a promising approach for nitrifier application in wastewater treatment.