Comparison of hydrogen production by four representative hydrogen-producing bacteria

Hydrogen production conditions from food waste by dark fermentation with Clostridium beijerinckii KCTC 1785

“…2A shows the accumulation of hydrogen produced from food waste at various temperatures (30, 35, 40, and 45°C). Generally, Clostridium species have been cultured at 35°C, and acetone-butanol-ethanol (ABE) fermentation and hydrogen fermentation has also been carried out between 35 and 37°C [27,28]. Similarly, hydrogen production in this study increased with increasing temperature, up to 40°C.…”

Kinetics and statistical behavior of metals dissolution from spent petroleum catalyst using acidophilic iron oxidizing bacteria

“…Due to several drawbacks of the conventional techniques described above, biotechnological leaching processes have been developed as a potential alternative. Different acidophilic microorganisms are used to recover metal values from various resources including waste petroleum catalyst [12][13][14]. Bacteria can produce various metabolites which are capable of extracting metal values from waste materials.…”

Characteristics of hydrogen production by immobilized cyanobacterium Microcystis aeruginosa through cycles of photosynthesis and anaerobic incubation

“…The hydrogen evolved in Stage II is a byproduct generated during the degradation of carbohydrate storage accumulated in Stage I [25,26]. Stage I is the period during which physiological activities and the viability of the cell are recovered, in addition to glycogen accumulation [8,16]. Thus, even though the glycogen stored in the Microcystis cells was exhausted during H 2 production, this does not mean that their metabolic activity (especially for H 2 production) was also completely drained.…”

“…Much research is currently being conducted regarding the development of environmentally friendly hydrogen production technology which would obviate the need for fossil fuels. Biohydrogen production by microalgae has drawn a great deal of attention since CO 2 fixation and nutrient removal from water can be accomplished simultaneously with hydrogen production [6][7][8].…”