Characteristics of the effect of light wavelength on the growth of photosynthetic bacterial biofilm

Xun Zhu, Nan Dang, Xin Tian, Qiang Liao, Yong Zhong Wang, Jun Li, Yong Shi, Yu Dong Ding

Research output: Journal PublicationArticlepeer-review


In a plate-type bioreactor for biofilm development, the experiments for the growth characteristic of high-efficiency hydrogen-production photosynthetic bacterial biofilm was undertaken under three different monochromatic light source with light wavelengths varied from 420 nm to 590 nm. The effect of light wavelength on the parameters of Rhodoseudomonas palustris biofilm is discussed, such as the surface coverage rate, thickness, dry weight, and density. The light wavelength has significant influences on the growth rate and structure of biofilm. Increased wavelength results in a higher surface coverage rate. While the dry weight of biofilm keeps almost constant at the same period. After 4 days, the thickness of biofilm decreases with the increase in light wavelength while longer light wavelength leads to higher density of biofilm, which results from the cell division and production of EPS by short light wave.

Original languageEnglish
Pages (from-to)915-919
Number of pages5
JournalChongqing Daxue Xuebao/Journal of Chongqing University
Issue number8
Publication statusPublished - Aug 2009
Externally publishedYes


  • Biofilm
  • Biofilm dry weight
  • Biofilm thickness
  • Photosynthetic bacteria
  • Visualization

ASJC Scopus subject areas

  • Computer Science (miscellaneous)
  • Civil and Structural Engineering
  • Materials Science (miscellaneous)
  • Electrical and Electronic Engineering


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