Jove
Visualize
Contact Us

Related Experiment Videos

The anoxic extractive membrane bioreactor.

E A C Emanuelsson1, J-P Arcangeli, A G Livingston

  • 1Department of Chemical Engineering, and Chemical Technology, Imperial College of Science Technology and Medicine, Prince Consort Road, London, SW7 2BY, UK.

Water Research
|February 25, 2003
PubMed
Summary

Nitrate effectively prevents biofilm formation in extractive membrane bioreactors (EMB), enhancing pollutant biodegradation. High nitrate levels maintain stable toluene flux and reactor performance under anoxic conditions.

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

Interparticle Forces of a Native and Encapsulated Metal-Organic Framework and Their Effects on Colloidal Dispersion.

ACS applied materials & interfaces·2021
Same author

Heterogeneous lollipop-like V2O5/ZnO array: a promising composite nanostructure for visible light photocatalysis.

Langmuir : the ACS journal of surfaces and colloids·2010
Same author

Evidence of species succession during chlorobenzene biodegradation.

Biotechnology and bioengineering·2007
Same author

Strain stability in biological systems treating recalcitrant organic compounds.

Biotechnology and bioengineering·2005
Same author

Overcoming oxygen limitations in membrane-attached biofilms--investigation of flux and diffusivity in an anoxic biofilm.

Water research·2004
Same author

Human cord blood long-term engrafting cells are CD34+ CD38-.

Leukemia·2003
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

Area of Science:

  • Environmental Biotechnology
  • Bioreactor Engineering
  • Wastewater Treatment

Background:

  • Extractive membrane bioreactors (EMB) utilize membranes for selective pollutant removal and biodegradation.
  • Excessive biofilm growth on EMB membranes hinders mass transfer and causes oxygen limitations.
  • Nitrate is explored as an alternative electron acceptor to oxygen for anoxic EMB operation.

Purpose of the Study:

  • To investigate the efficacy of nitrate as an electron acceptor in anoxic EMBs.
  • To evaluate the impact of varying nitrate concentrations on biofilm formation and toluene biodegradation.
  • To analyze the effects on soluble microbial products (SMPs) and bacterial hydrophobicity.

Main Methods:

  • Four experiments were conducted using toluene as a model hydrophobic organic compound.

Related Experiment Videos

  • Anoxic conditions were maintained with varying nitrate concentrations.
  • Measurements included toluene flux, biofilm formation, SMP production, and bacterial hydrophobicity.

    • Main Results:

    • High nitrate concentrations prevented biofilm formation and maintained stable toluene flux.
    • Low nitrate concentrations led to decreased toluene flux and significant biofilm growth.
    • SMP production increased under nitrate-limiting conditions, while suspended bacterial hydrophobicity remained constant.

    Conclusions:

    • Nitrate serves as an effective electron acceptor in anoxic EMBs, mitigating biofilm issues.
    • Optimizing nitrate concentration is crucial for stable and efficient removal of hydrophobic organic compounds.
    • Bacterial hydrophobicity differs between attached and suspended cells, with attached cells exhibiting greater hydrophobicity.