%K Bio-hydrogen; Bio-hydrogen production; Biological hydrogen production; Biological production; Clean fuel; Dark fermentation; energy; Environmental-friendly; On currents; Operational parameters; Photo fermentation, Fermentation; Fuels; Hydrogen; Innovation; Sustainable development, Photobiological hydrogen production %X Biological production of hydrogen is the most environmental friendly method in producing hydrogen, a clean fuel which produces only water upon combustion. There are many references available on biohydrogen production. This paper presents a review on current biological hydrogen production focusing on dark and photo fermentation processes. Limitation for hydrogen production such as source of substrate, type of microorganism employed and operational parameter are discussed in this paper. © 2011 IEEE. %L scholars1726 %J 2011 National Postgraduate Conference - Energy and Sustainability: Exploring the Innovative Minds, NPC 2011 %O cited By 4; Conference of 3rd National Postgraduate Conference - Energy and Sustainability: Exploring the Innovative Minds, NPC 2011 ; Conference Date: 19 September 2011 Through 20 September 2011; Conference Code:88531 %R 10.1109/NatPC.2011.6136349 %D 2011 %A N.S. Muhamad %A N.A. Johan %A M.H. Isa %A S.R.M. Kutty %T Biohydrogen production using dark and photo fermentation: A mini review %C Perak