Light irradiance and spectral distribution effects on cyanobacterial hydrogen production

International Conference on Advances in Renewable Energy and Technologies 2016

Salleh, Siti Fatihah^1 ; Kamaruddin, Azlina^2 ; Uzir, Mohamad Hekarl^2 ; Mohamed, Abdul Rahman^2 ; Shamsuddin, Abdul Halim^1

Centre for Renewable Energy, Universiti Tenaga Nasional, Kajang, Selangor

43000, Malaysia^1

School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, Seri Ampangan, Nibong Tebal, Penang

14300, Malaysia^2

关键词: Different lights;    Energy source;    Heterocystous cyanobacterium;    Hydrogen production rate;    Light irradiances;    Light spectrum;    Photosynthetic productivity;    Spectral distribution;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/32/1/012046/pdf
DOI  :  10.1088/1755-1315/32/1/012046

来源: IOP

【 摘 要 】

Light is an essential energy source for photosynthetic cyanobacteria. Changes in both light irradiance and spectral distribution will affect their photosynthetic productivity. Compared to the light irradiance, little investigations have been carried out on the effect of light spectra towards cyanobacterial hydrogen production. Hence, this work aims to investigate the effects of both light quantity and quality on biohydrogen productivity of heterocystous cyanobacterium, A.variabilis. Under white light condition, the highest hydrogen production rate of 31 μmol H2mg chl a-1h-1was achieved at 70 μE m-2s-1. When the experiment was repeated at the same light irradiance but different light spectra of blue, red and green, the accumulations of hydrogen were significantly lower than the white light except for blue light. As the light irradiance was increased to 350 μE m-2s-1, the accumulated hydrogen under the blue light doubled that of the white light. Besides that, an unusual prolongation of the hydrogen production up to 120 h was observed. The results obtained suggest that blue light could be the most desirable light spectrum for cyanobacterial hydrogen production.