Abstract
The effects of wavelength and intensity of light on energy conversion efficiency of the process of photo-hydrogen production by Rhodoseudomonas palustris was studied by experiments. It is found that at fixed light wavelength the photo-biochemical efficiency of the strain decreases with light intensity increasing, that under the same light intensity the maximum photo-biochemical efficiency is gained at 590 nm and the maximum value is 31.91% in the experiment. While the Rhodoseudomonas palustris presents the minimum photo-biochemical efficiency at 470 nm of the light wavelength. This indicates that the process of photo-hydrogen production depends on both of the light intensity and wavelength. Therefore, different levels of energy in pigment molecule is blazed by different wavelength, this leads to distinct photochemical pathways which are glucose fermentation, hydrogen production, inhibited metabolism in low intensity, optimal intensity and strong intensity of light, respectively. However, the utilization efficiency of energy used to synthesize biomass and hydrogen production is only 1.31% under 590 nm and 6000lx conditions, since the most energy has been consumed by respiration of cells and stored in the interim products.
| Original language | English |
|---|---|
| Pages (from-to) | 390-396 |
| Number of pages | 7 |
| Journal | Taiyangneng Xuebao/Acta Energiae Solaris Sinica |
| Volume | 30 |
| Issue number | 3 |
| Publication status | Published - Mar 2009 |
| Externally published | Yes |
Keywords
- Photo-biochemical conversion rate
- Photo-bioproduction hydrogen
- Photosynthetic bacteria
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Atomic and Molecular Physics, and Optics
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
