Bioconversion characteristics of Rhodopseudomonas palustris CQK 01 entrapped in a photobioreactor for hydrogen production

► The conversion efficiencies during H2 production were evaluated. ► The system at 590 nm could engage in metabolism of energy storage for H2 production. ► The system was of higher energy recovery capacity to the special monochromatic light. ► The total energy efficiency was far lower than the light conversion efficiency.