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A Novel Bioreactor for High Density Cultivation of Diverse Microbial Communities
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Biofilm formation in attached microalgal reactors.

Y Shen1, W Zhu2, C Chen2

  • 1College of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, Fujian, 350108, China. yshen@fzu.edu.cn.

Bioprocess and Biosystems Engineering
|April 18, 2016
PubMed
Summary
This summary is machine-generated.

This study explored biofilm formation using drum and plate biofilm reactors. Optimal conditions with canvas substrate and glycine achieved high biofilm productivity and adhesion.

Keywords:
Biofilm reactorExtracellular polymeric substancesMicroalgaeNitrogenSubstrate

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Area of Science:

  • Biotechnology
  • Environmental Science
  • Materials Science

Background:

  • Biofilm formation is crucial in various industrial and environmental settings.
  • Understanding the factors influencing biofilm development is essential for optimizing processes.
  • Extracellular polymeric substances (EPS) play a key role in biofilm structure and adhesion.

Purpose of the Study:

  • To investigate the fundamental mechanisms of biofilm formation.
  • To analyze the impact of porous substrates on biofilm development.
  • To determine the influence of nitrogen source and concentration on EPS composition and biofilm yield.

Main Methods:

  • Utilized a drum biofilm reactor with cotton rope, canvas, and spandex substrates.
  • Employed a plate biofilm reactor (PBR) with increased surface area for nutrient diffusion.
  • Analyzed EPS composition and biofilm formation under varying nitrogen conditions and sunlight.

Main Results:

  • Both substrate type and nitrogen concentration significantly affected EPS composition and biofilm formation.
  • Canvas substrate and glycine (1 g/l) as the nitrogen source yielded optimal results.
  • Achieved maximum biofilm productivity of 54.46 g m⁻² d⁻¹ with an 84.4% adhesion ratio.

Conclusions:

  • Substrate properties and nitrogen availability are critical factors controlling biofilm formation and EPS production.
  • The plate biofilm reactor (PBR) design facilitates efficient biofilm cultivation.
  • Optimized conditions demonstrate potential for enhanced biofilm productivity in biotechnological applications.